Precision guided disc golf launcher: noobs are now pros

Stuff Made Here
2 May 202425:43

Summary

TLDRIn this exhilarating video, the creator embarks on a quest to enhance his Disc Off skills by designing and building a unique disc launcher, affectionately termed a 'disc bazooka.' The ambitious project aims to achieve pinpoint accuracy and control over the disc's speed and spin, with the hope of rivaling professional players. The journey is fraught with trials, including grappling with the physics of disc flight, overcoming mechanical challenges, and refining the launcher's design through numerous iterations. The video documents the meticulous engineering process, from conceptualization and prototyping to the final testing phase. Along the way, the creator experiments with various wheel configurations, grapples with motor control issues, and implements innovative solutions to achieve the desired disc trajectory. The culmination of the project results in a device capable of launching discs at high speeds and with impressive accuracy, offering a thrilling demonstration of the power of engineering and innovation in the realm of disc sports.

Takeaways

  • 🚀 The creator built a disc bazooka to improve his Disc Off skills, aiming for accuracy and control over the disc's speed and spin.
  • ⚙️ The device was designed with multiple stages to incrementally increase the disc's speed, similar to a mechanical rail gun.
  • 🤔 Initial tests revealed issues with grip and slippage, leading to destructive vibrations and the need for multiple rebuilds.
  • 🔄 The final design included a system of wheels and rollers to grip and spin the disc, with modifications to prevent it from getting locked between wheels.
  • 💡 A computer running Linux with a touchscreen was integrated to control the machine and allow for more precise adjustments.
  • 🔋 The use of flywheels stored energy to deliver a large amount of power in a short time, overcoming the underpowered motors.
  • 🛠️ The project required precise machining and careful balancing due to the high vibration levels and the number of parts involved.
  • 🔩 The launcher was modular, designed for easy assembly and repair, with parts that could be 3D printed to simplify the process.
  • 🔋 A complex electrical system was involved, with the challenge of managing high current draw from multiple motors.
  • 🧠 Software was developed to control the motor speeds, using hall effect sensors to measure and adjust the rotation of each wheel.
  • 🎯 Despite challenges, the final result was a machine capable of launching discs with high speed and spin, although it could only spin discs in one direction.

Q & A

  • What was the original purpose of the disc launcher?

    -The original purpose of the disc launcher was to improve the user's skill at Disc Off by providing better accuracy in launching discs with controlled speed and spin.

  • What is Disc Off and how is it different from regular golf?

    -Disc Off is a sport similar to regular golf, but instead of using a golf ball and a hole, players use a disc (frisbee) and a basket. The objective is to get the disc into the basket with the minimum number of throws.

  • Why did the creator decide to build a disc bazooka?

    -The creator decided to build a disc bazooka to achieve greater accuracy and control over the speed and spin of the disc, with the hope of becoming as good as a professional player at Disc Off.

  • What was the main challenge faced during the development of the disc launcher?

    -The main challenge was finding a way to grip the disc securely without causing it to bend or slip, while also ensuring that it could be launched with high speed and spin.

  • How did the creator address the issue of the disc not spinning properly?

    -The creator redesigned the launcher to spread the wheels out, allowing the disc to touch no more than two wheels at any given time, which enabled the disc to spin freely without jamming.

  • What is the significance of the flywheel in the motor?

    -The flywheel stores a significant amount of energy as it spins with the motor. It can deliver a large amount of energy in a very short time, which is crucial for the initial high-speed launch of the disc.

  • What safety measures were taken to prevent damage or accidents during the testing of the disc launcher?

    -The creator used a knee stop mechanism to quickly halt the operation of the launcher if things went wrong, preventing further damage or potential accidents.

  • How did the creator ensure repeatability and consistency in the disc launcher's performance?

    -The creator designed a mini launcher mechanism that holds the disc in a repeatable position and releases it straight with momentum when the computer is ready to fire, ensuring consistency in each launch.

  • What software and hardware components were used in the final design of the disc launcher?

    -The final design included a computer running Linux with a touchscreen interface, 16 motor controllers with flywheels, and a software system to calculate and control the precise speed of each motor for accurate disc launch.

  • What was the maximum distance achieved with the disc launcher in the video?

    -The maximum distance achieved with the disc launcher was approximately 450 feet at a speed of around 90 mph.

  • What future improvements does the creator plan to make to the disc launcher?

    -The creator plans to add more sophisticated aiming and tracking systems to predict the flight of the discs more accurately and to improve the launcher's consistency and accuracy further.

Outlines

00:00

🚀 Introduction to the Disc Bazooka Project

The speaker introduces a project to create a 'disc bazooka' aimed at improving their skills in Disc Off, a sport similar to golf but using a frisbee-like disc and a basket instead of a ball and hole. The bazooka is designed for accuracy, with full control over the disc's speed and spin. The speaker also mentions the challenges faced in building the device, including its tendency to self-destruct and the need for numerous rebuilds.

05:01

🔧 Building and Testing the Disc Launcher

The speaker details the process of constructing the disc launcher, which uses a series of wheels to grip and launch the disc. They discuss the importance of grip and the need for a slippery surface to prevent slipping. The initial tests reveal that the discs do not spin and are unstable. To address this, the design is modified to allow the disc to spin freely. The speaker also talks about the power requirements, using flywheels to store energy for quick bursts of power.

10:02

💻 Integration and Software Control of the Launcher

The speaker describes the complexities of integrating all the components of the launcher and the software needed to control the precise speeds of the motors. They encounter issues with motor drivers and the need for accurate speed control. To solve this, they implement hall effect sensors to measure the speed of each wheel and adjust the motor control accordingly. This allows for precise control of the disc's speed and spin.

15:02

🎯 Outdoor Testing and Aiming Challenges

The speaker takes the launcher outdoors for testing and finds that it exceeds expectations, despite initial difficulties with aiming due to the disc's unpredictable flight path. They discuss the need for a system to track the discs and collect data to improve accuracy. The speaker also shares their personal learning habit of spending at least 30 minutes a day on self-improvement using an online platform called Brilliant.

20:02

🏌️‍♂️ Disc Off Skills and Future Improvements

The speaker reflects on the potential of the launcher to improve their Disc Off skills, even humorously considering it a form of cheating. They mention the plan to build a device to track discs in the future and the need for software to predict their flight paths. The video concludes with an exciting demonstration of the launcher's power, slicing a disc in half and emphasizing the importance of safety when operating such a device.

Mindmap

Keywords

💡Disc Off

Disc Off is a sport similar to golf, where the objective is to get a frisbee (referred to as a 'disc' in the sport) into a basket using the fewest number of throws possible. It is a key theme in the video, as the creator is attempting to improve his Disc Off skills by building a device to launch discs with greater accuracy and control.

💡Disc Bazooka

The term 'Disc Bazooka' refers to the disc launcher device that the video's creator has built. It is designed to provide full control over the speed and spin of the disc, aiming to increase accuracy in the sport of Disc Off. The device is a central focus of the video, showcasing the engineering process and its application in the sport.

💡Accuracy

Accuracy is the ability to launch the disc with a controlled speed and spin, ensuring it reaches the intended target. It is a critical concept in the video, as the creator's goal is to enhance his Disc Off performance by creating a device that can consistently and accurately launch discs into the basket.

💡Flywheel

A flywheel is a mechanical device that stores rotational energy. In the context of the video, the flywheel is attached to the motor and is used to deliver a large amount of energy in a short time, which is essential for the high-speed launching of the disc. The flywheel plays a significant role in the power dynamics of the disc launcher.

💡Motor Controllers

Motor controllers are devices that regulate the speed and torque of electric motors. In the video, the creator uses motor controllers to control the speed at which the wheels of the disc launcher rotate, which in turn affects the speed and spin of the launched disc. The motor controllers are a key technical component in achieving the desired disc trajectory.

💡Hall Effect Sensor

A Hall effect sensor is a type of sensor that detects magnetic fields and is used in the video to measure the rotational speed of the launcher's wheels. The creator uses these sensors to provide feedback on the actual speed of the wheels, allowing for more precise control and adjustments to be made for better disc launching accuracy.

💡Slip

Slip in the context of the video refers to the wheels of the launcher not having enough grip on the disc, causing it to slide rather than being launched effectively. The creator discusses the issue of slip and how it affects the performance of the disc launcher, leading to various design modifications to improve grip and control.

💡Vibration

Vibration is a mechanical phenomenon that can cause instability and damage to the launcher if not controlled. The video mentions the destructive effects of vibrations, particularly when the disc launcher is operated at high speeds. The creator had to take measures to minimize vibrations for the system to function properly.

💡Modular Design

The modular design approach allows the disc launcher to be broken down into smaller, independent units or sub-assemblies. This design philosophy is used in the video to simplify assembly, maintenance, and repairs. It also aids in the customization of the launcher by allowing individual components to be upgraded or replaced as needed.

💡Repeatability

Repeatability in the video refers to the launcher's ability to consistently launch discs in the same manner, which is crucial for achieving predictable flight paths. The creator emphasizes the importance of repeatability for improving the accuracy and reliability of the disc launcher.

💡Sunk Cost Fallacy

The sunk cost fallacy is a concept where one continues investing in a decision based on the cumulative prior investment (' sunk cost') rather than evaluating the current and future value of the investment. In the video, the creator humorously refers to this fallacy when he decides to continue working on the disc launcher despite the significant time and resources already invested.

Highlights

The creation of a disc bazooka designed for accuracy in disc golf.

The bazooka has full control over the disc's speed and spin.

Aims to improve the user's disc golf skills to a professional level.

The bazooka is capable of shooting a disc faster than any human.

The project faced numerous trials and had to be rebuilt multiple times due to design flaws.

The importance of grip in launching discs at high speeds.

Innovative use of a Hot Wheel set as a prototype for the disc launcher mechanism.

The concept of a mechanical rail gun inspired the multi-stage acceleration of the disc.

Challenges in achieving consistent disc spin due to wheel contact.

Design of a modular sub-assembly system for easier assembly and repair.

Use of flywheels to store and deliver large amounts of energy in a short time.

Integration of a computer running Linux with a touchscreen for precision control.

Engineering solutions to overcome motor speed control issues using hall effect sensors.

Successful launch of discs with precise speed and spin, demonstrating the bazooka's potential.

The bazooka's ability to shoot discs over 450 ft at 90 mph.

The need for further development of aiming and tracking systems for improved accuracy.

Demonstration of the bazooka's power by shooting a machete in front of a disc.

The use of Brilliant.org for daily learning and skill development.

Transcripts

00:00

a few years ago I made this dis

00:02

launching Gauntlet it was supposed to

00:04

make me better at disc off but it just

00:06

kind of ended up being

00:10

dangerous I couldn't let that stand so I

00:13

made

00:13

[Music]

00:15

this it's basically a disc bazooka this

00:18

thing is designed for accuracy it has

00:20

full control over the speed and spin of

00:22

the disc and once we get sights on it it

00:24

should be able to snipe the basket and

00:26

I'm hoping it can make me as good as a

00:28

pro it's also insane L powerful it can

00:31

shoot a disc faster than any human so

00:33

we'll definitely be having some fun and

00:35

shooting it at stuff and yes that's a

00:40

sword I'm also going to show you the

00:42

trials and tribulations of getting this

00:43

thing working and you're in for a treat

00:45

because it was terrible it really wanted

00:48

to tear itself apart and it refused to

00:50

work in reality the way that theory said

00:53

it should so I had to rebuild and

00:56

rebuild and rebuild it has so many parts

01:00

now that I have this I think there might

01:02

be a simpler way to do it but is there a

01:05

cooler way I don't know this is pretty

01:07

cool if you're not familiar with this

01:09

golf it's very similar to real golf

01:11

except instead of getting a golf ball

01:12

into a hole you're trying to get a

01:14

frisbee into a basket the second most

01:16

important thing to know about Disc Off

01:17

is you never call it a frisbee it's a

01:19

disc frisbees are for babies discs are

01:22

for men and at the end of the day you're

01:24

trying to get the disc into the basket

01:27

with the minimum number of throws the

01:28

discs fly like little airplanes so any

01:31

variation in wind or how you launch them

01:33

can make them go to completely different

01:35

locations in fact I think it's

01:37

physically impossible to consistently

01:38

get hole in one so my goal is for this

01:41

to make me as good as a pro get to the

01:43

basket in a couple of throws and then

01:45

snipe it in to do this we need accuracy

01:48

which means launching discs with very

01:50

controlled speed and spin so with all

01:52

this in mind I went back to the drawing

01:54

board and came up with a completely new

01:56

design this is my kids Hot Wheel set

01:59

it's a so my general idea specifically

02:01

this little box down here has two wheels

02:04

that rotate in opposite

02:06

directions and if we push a car into it

02:09

it launches it super fast this should

02:11

work with a disc as well this is a mini

02:14

little fake Disc Off disc watch what

02:17

happens if we shove it into the

02:21

wheels oh wow no

02:24

way oh so close what's really cool is

02:28

you can make it spin

02:30

by making one of the wheels go faster

02:32

than the other but there is a problem

02:34

there's a limit to how fast you can make

02:35

a car or a disc go with this kind of

02:38

setup let me show you what I

02:41

[Music]

02:42

mean I've modified the Hot Wheel track

02:45

to take this die

02:48

grinder before it was launching cars at

02:51

maybe 10 m hour on paper this should

02:53

give us closer to 40 what do you think

02:55

is going to happen

02:57

[Music]

03:00

pretty much the same speed here it is in

03:03

slow motion do you see the

03:05

problem the launcher wheels are just

03:07

slipping the same thing happens when a

03:10

car does a burnout it doesn't matter how

03:12

powerful your engine is if you ain't got

03:13

the grip it's just going to slip but

03:16

imagine if I took 10 of these launchers

03:18

and put them in a row the first one

03:20

would get the car going fast the second

03:22

one faster and on and on and on it's

03:25

basically a mechanical rail gun so if we

03:28

did this and precisely controlled the

03:29

velocity of all the wheels we could

03:31

launch a disc with whatever speed and

03:33

spin that we want all right let's get it

03:37

made the hardest part of this project is

03:40

going to be how do I grip the disc I

03:42

want to put a ton of force into it but

03:44

it's really hard to do that so this is

03:45

the simplest possible Arrangement that I

03:47

could build that will let me try

03:49

different kinds of Wheels gripping the

03:50

disc so we're going to just shoot the

03:53

disc out see what happens go from there

03:56

so do you think it's going to work here

03:58

we go

04:00

[Applause]

04:06

I probably should have put a little bit

04:07

more effort into it this is a great

04:09

example of how destructive vibrations

04:11

can be I'm going to have to be really

04:13

careful with

04:15

this well I'm glad I put the minimum

04:17

effort into this thing because it

04:20

stinks remember how I made a big deal

04:22

about slip yeah if you look closely

04:26

you'll see the disc bending when it goes

04:27

between the wheels this means I can't

04:29

squeeze the disc any harder because

04:31

it'll just bend more every time I launch

04:33

a disc you can just smell burning rubber

04:35

burning plastic so we're slipping we

04:38

really need a better way to grip these

04:40

discs the direction I was going in is

04:43

trying to grip the end of the disc with

04:45

a V kind of like a v- belt pulley but

04:47

thinking it through it seemed really

04:50

hard to do practically but then I was

04:52

thinking well if we put the wheels on

04:54

top and bottom that's kind of like a vwh

04:57

with these I can squeeze pretty much as

04:58

hard as I want so I can generate an

05:00

enormous amount of friction we'd still

05:02

put a set on each side of the disc so we

05:04

can make it spin but we don't actually

05:06

need a tire on the bottom we just need

05:08

something slippery to squeeze

05:10

against before we can make the whole

05:12

thing I need to test it I need to see

05:14

how much grip we can get and see if it

05:16

can actually

05:18

work these rollers are the slippery

05:20

surface we're going to push the disc

05:21

against I really like how the wheels are

05:23

folded on top they push the disc through

05:26

and by driving them different speeds we

05:28

can still make it spin so hopefully this

05:30

will suck the disc in and spit it out

05:33

like it tastes terrible let's

05:42

see pretty clear the discs just aren't

05:44

getting any spin they're coming just

05:46

straight out which makes them very

05:48

unstable we need the disc to spin so it

05:51

acts like a gyroscope and resist turning

05:53

over the wheels driving at different

05:55

speeds should be able to spin the disc

05:57

but when the disc goes between two sets

05:59

of Wheels it's touching four wheels at

06:01

the same time and it can't spin it gets

06:04

totally locked you can see how much the

06:06

tires are rubbing on the disc when this

06:08

happens I think what I need to do is

06:09

spread these wheels out so that the disc

06:11

isn't touching more than two wheels at

06:13

any given time so we're going to

06:14

redesign and remake a bunch of these

06:16

parts to stretch it out like a limo and

06:18

see if we can get that to work it's

06:21

pretty much the same thing just slightly

06:22

different like twins there's enough

06:25

space between the wheels for the disc to

06:27

spin freely without jamming up really

06:30

not a lot to see for so much work but

06:32

hopefully it'll make all the difference

06:34

so let's find

06:38

out okay that is totally spinning it's

06:41

not perfectly stable but it's way better

06:44

and we should get more spin with more

06:46

stages based on the speeds I'm getting

06:48

out of the test stand I think I need six

06:50

stages but I'm going to make eight just

06:52

to be safe the wheels are really hard so

06:54

I'm going to get them done

06:56

first this was harder to make than I

06:58

expected vibration is a huge problem so

07:02

everything had to be machined extremely

07:04

accurately and even after all that

07:05

effort everything had to be carefully

07:08

balanced I spent a lot of time designing

07:10

them to be easy to assemble because

07:12

there's so many of them which really

07:14

saved my bacon because I ended up

07:16

rebuilding these things so many

07:19

times there's a really important detail

07:21

that I've been glossing over which is

07:24

how much power we need out of the motors

07:26

and if you do the math you actually need

07:28

basically this motor inside of every

07:31

single wheel and this is the motor that

07:33

I'm using it is a little bit

07:35

underpowered every motor will have a

07:37

chunk of Steel attached to it that looks

07:39

like this it's called a flywheel this

07:41

will spin up with the motor and store a

07:43

ton of energy think of a car that's

07:45

moving fast or a cannonball once it's

07:47

going to stop it you have to take all

07:49

that energy out the neat thing about a

07:51

flywheel is it can deliver an enormous

07:53

amount of energy in a very short amount

07:55

of time kind of like a car hitting a

07:57

wall it's pretty amazing but this little

08:00

piece of Steel can deliver as much power

08:01

as this motor for a couple milliseconds

08:04

but that's all we

08:07

need the rest of the machine is really

08:09

similar to the previous ones there's

08:11

just a lot more of everything I've

08:13

actually had this idea for 2 years but I

08:15

was waiting until I got the water jet

08:17

because I knew there was going to be a

08:18

lot of parts like this trying to machine

08:20

all these in another way would be such a

08:22

nightmare

08:30

thankfully a bunch of the parts could be

08:31

3D printed because there are so many

08:34

parts I designed the whole thing to be

08:36

three modular sub assemblies that

08:39

combine together like a Transformer to

08:41

make a mighty launcher this makes it a

08:43

lot easier to assemble and if I destroy

08:45

something it's a lot easier to repair do

08:47

you remember those 5ft subs from

08:49

elementary school they'd bring to

08:51

parties that's basically what this is

08:53

the biggest change is this thing I don't

08:56

love having a long thing hanging off the

08:58

back of my disc launcher but I think

08:59

it's really important we want the disc

09:01

to come out very repeatably which means

09:04

we need to put the disc in very

09:05

repeatably you can imagine if it was

09:07

angled up or down it'll bounce through

09:09

the system and come out differently this

09:11

is kind of like a mini launcher that

09:14

back and it holds the disc and

09:16

then when the computer's ready to fire

09:17

it'll release it and push it nice and

09:21

straight with some momentum right into

09:23

the launcher the disc is held back with

09:25

a trigger mechanism which is really

09:26

important for releasing the disc when

09:28

everything is going exactly the right

09:30

speed and getting consistency it also

09:32

has handles for picking it up like this

09:35

it's not that heavy and then

09:37

electrically there's just basically 16

09:39

of everything which was painful and

09:41

expensive and of course there's knee

09:42

stop because if things go wrong you want

09:44

to make them stop going wrong fast

09:48

although there is a big problem if I

09:49

turn all the motors on at the same time

09:51

they're going to be pulling an enormous

09:53

amount of current trying to spin up

09:55

their fly wheeels and it's going to be

09:56

like 400 amps which will just melt

09:59

everything the battery will explode

10:01

it'll probably start a really foul

10:03

smelling fire so I have to do a little

10:05

more complicated thing where I spin them

10:07

up kind of one at a time and that should

10:10

limit the current to something more

10:12

manageable and then it also has a

10:14

computer running Linux with a

10:15

touchscreen which might seem Overkill

10:18

but I'm planning to add a lot more

10:19

smarts into this later this is going to

10:21

give me an interface to make me way more

10:23

accurate the last thing we need is some

10:25

software that'll calculate how these

10:27

motors all need to spin to make the disc

10:29

go the way that we want it to and

10:31

there's a lot of different strategies to

10:32

do this the most obvious way would be to

10:35

evenly split the acceleration between

10:37

all the wheels but this doesn't really

10:39

work because physics the amount of

10:41

energy it takes to make something go

10:43

from 0 to 30 mph is the same to go from

10:46

85 to 90 mph you might remember the

10:49

whole 1 12 MV squared thing this is that

10:52

which counter intuitively means I need

10:54

each stage to speed the disc up less and

10:57

less but this should actually evenly

10:59

spread the load and give me the maximum

11:01

amount of grip and that's pretty much it

11:03

it's simultaneously not that bad but

11:05

also kind of complicated I think it

11:07

should work but there's really only one

11:08

way to find out so here we

11:20

go here we

11:23

[Music]

11:26

go all aboard next stop integration hell

11:31

when you put all the pieces together it

11:33

never works I started off Strong by

11:35

blowing up half the motor drivers but

11:37

even worse it's throwing discs even

11:39

worse than

11:40

me I thought we fixed this I see a lot

11:44

of problems the first is the disc doing

11:47

this it's not supposed to swim like a

11:49

whale it looks like the disc's able to

11:51

dip down between the rollers and then it

11:53

pops up and then develops a really bad

11:56

oscillation basically a bucking bronco

11:59

[Music]

12:02

so I'm going to try to put a guide right

12:03

down the middle and that'll hopefully

12:05

stop it so let's

12:12

see oh yeah that was way

12:19

better the guide rails totally work but

12:21

there's another really big problem that

12:24

I really don't want to solve if you look

12:25

at the disc closely it's not really

12:27

spinning we to shoot it far it's just

12:30

going to flip over and slam into the

12:31

ground ask me how I know I think this is

12:34

because I don't have good control over

12:36

the speeds that the different Motors go

12:38

if they're going the wrong speed the

12:40

disc is just going to do random stuff

12:42

and this is happening because I'm using

12:43

cheap motor controllers that have very

12:45

bad speed control if I tell them all to

12:47

go the same speed they all go different

12:49

speeds we could either buy thousands of

12:52

dollars worth of nice motor

12:54

controllers or we could do some really

12:58

annoying engineering that I don't want

13:00

to

13:01

do all right so I've been doing some

13:03

engineering and this is what I came up

13:04

with what I'm going to try to do is

13:06

measure how fast each wheel is rotating

13:08

using one of these this is called a hall

13:10

effect sensor and it detects a magnetic

13:13

field so I have one set up right here

13:15

wire to this light and if I bring a

13:17

magnet near it it will detect it and

13:20

turn this light on if we strategically

13:22

place a magnet on each wheel and put a

13:24

hall effect sensor nearby it we will see

13:27

that magnet every time it spins by so

13:30

now if the motor controller is going the

13:31

wrong speed we can quantify how wrong it

13:33

is and compare it to the speed we want

13:35

it to go and adjust the speed we're

13:38

telling the motor controller to go until

13:40

the speed it's actually doing matches

13:41

what we want we have to install and wire

13:43

in 16 of these because they're 16 of

13:46

everything this is getting ridiculous so

13:49

the hall effect sensors work but it

13:51

still doesn't work because these

13:55

motor so watch what happens when I try

13:57

to go 1,000 RPM which is a very

14:00

important RPM for me to be able to

14:04

[Music]

14:06

go the motor drivers will not go below

14:10

2500 rpm so I think the right thing to

14:13

do would be to get motor drivers that

14:14

can go the speed that I want but we're

14:16

in pretty deep now so I think it's time

14:18

to go full sunk cost fallacy and just

14:20

try to fix this in software so here's my

14:23

plan if I want a motor to be going slow

14:26

when I fire I can just turn it off

14:28

before I fire and let it slow down and

14:31

right when it hits the right speed boom

14:34

you're fired but It's Tricky with

14:35

multiple motors going different speeds

14:37

because they need different times to

14:39

slow down but I can have the computer

14:41

calculate when to turn each motor off so

14:43

they all reach the right speed at the

14:45

same time and when that happens you're

14:48

fired and when it works it looks like

14:50

this you have all the motors going a

14:52

precise speed to make the disc do what

14:54

we want and it's so cool

14:59

my wife is here to see what I've been up

15:02

to what do you think looks been

15:03

complicated I thought this was going to

15:05

be easy no I think that I know but I

15:07

really thought it like it's always think

15:09

that it's a bunch of Wheels how hard

15:11

could it be you know there's nothing to

15:13

it turns out there was something to it

15:16

you want to press the buttons you see

15:18

what this thing does oh thanks are you

15:20

sure yeah you don't want to fire it no

15:24

how do you not want to fire it I want to

15:26

see what happens you got to admit pretty

15:28

cool yeah you look totally normal take

15:30

it on over to the old disc golf course

15:33

see what happens you look like a vendor

15:35

selling uh Wheels instead of hot dogs at

15:37

a game

15:39

popcorn get your

15:41

popcorn all right so you ready to see

15:43

the

15:44

future here we

15:47

[Music]

15:49

go on buildups you're very sh

15:53

[Music]

15:57

off that sounded good

16:01

goody I

16:11

know

16:14

why I thought I was done but instead I

16:16

got 2 weeks of pain this has been

16:18

driving me insane it was spinning before

16:22

now it's not but I think I figured out

16:24

what's going on it's almost the same

16:26

thing as before where the disc would get

16:27

locked between four wheels but it can't

16:29

physically touch four wheels but I did

16:32

increase the compression of The Wheels

16:34

on the disc so now they're making first

16:36

contact with disc here instead of here

16:38

which is really good at stopping Spin

16:41

and I've tried so many things to try to

16:43

mitigate this but most of them didn't

16:45

work so we're not going to go into all

16:46

the details but here's a little taste

16:48

first I tried to fix it in software with

16:50

about 10 different disc acceleration

16:52

strategies they didn't work I tried so

16:54

many things related to friction and

16:56

wheels I thought for sure this was going

16:58

to work

16:59

but it didn't I also thought for sure

17:02

this was going to

17:04

work but it

17:06

didn't don't even ask you know what

17:10

really stinks having 16 of everything

17:13

but I had an epiphany last night and I

17:15

think I figured it out so let's see

17:22

[Music]

17:34

finally you can tell it's working well

17:36

when the discs drive across the net like

17:38

a car all of my fixes are based on the

17:41

idea that it takes a lot less energy to

17:43

get the disc spinning than moving fast

17:45

laterally so I'm splitting the boosters

17:47

into two groups spinny ones not spinny

17:50

ones the first four stages don't attempt

17:53

to spin the disc they just accelerate it

17:55

as fast as possible and then the fifth

17:57

stage starts at spinning in the last

17:59

three stages only have a wheel on the

18:01

left and if you think about it since

18:03

it's pushing on the edge this will push

18:05

the disc forward but it'll also spin it

18:07

and if you only have a wheel on the left

18:09

side it doesn't lock up so all these

18:11

things together let me get it going

18:13

really fast with a ton of spin so one

18:16

downside with the front wheel

18:17

Arrangement is that we can only spin the

18:19

disc one way but I don't think it's a

18:21

big deal something I want to fix but for

18:23

now you can make the disc go as fast as

18:25

you want with as much spin as you want

18:27

as long as it's clockwise

18:29

wise all right it's time to touch grass

18:32

go outside and find out what this thing

18:34

can do

18:56

[Music]

18:58

[Applause]

19:02

[Music]

19:08

whoa

19:10

[Music]

19:21

wow this is far exceeding my

19:23

expectations it's possible because I set

19:25

them low but I'm just firing from the

19:27

hip with no sights and I'm getting the

19:30

discs to land really close to each other

19:32

I can't imagine how good it would be

19:34

with

19:35

sights it's also really cool because

19:37

it's showing how discs launched the same

19:39

way can fly completely differently

19:41

depending on their air foil shape but

19:43

don't forget we can also change the

19:44

speed and spin this has a huge impact on

19:47

where a dis flies and is going to be

19:49

challenging for predicting where discs

19:51

are going to go all right it's time for

19:53

more speed

20:00

so I think we may have found the speed

20:02

limit I ripped apart one of the wheels

20:04

and then I fixed it and we ripped

20:06

another wheel off its rim and then I

20:08

fixed it and we ripped another wheel off

20:10

its Rim around 90 mph is where these

20:13

wheels just say they can't take it

20:14

anymore this is the sound of the wheel

20:16

giving

20:20

up I don't want to destroy everything so

20:23

I'm going to stop while I'm ahead but we

20:25

got a few good shots in and we're

20:26

getting about 450 ft at 9 mph I think I

20:30

should be able to do better than that

20:31

but there's a lot of things that can

20:32

make you go short so the problem I have

20:35

is that I can't aim this thing because I

20:37

don't know where the discs are going to

20:38

go they're like little airplanes and

20:40

depending on their speed and spin and

20:42

air foil shape they fly in completely

20:45

different ways so the first question is

20:47

if we shoot the same disc in the same

20:49

way does it go to the same place so I

20:51

built this really over engineered test

20:53

stand to prove it to myself I did a lot

20:56

of testing

20:59

as expected it can't get a hole in one

21:00

every time but it's pretty good and

21:03

sometimes it

21:05

[Music]

21:08

can

21:10

oh and besides if I can get even

21:13

remotely close to the basket I should be

21:15

able to just snipe it in we'll have to

21:17

work on the speed though I don't know

21:20

how discs fly I'm going to have to make

21:21

a thing to track the discs so I can get

21:23

a lot of data and then if I combine that

21:25

with some software which will show me on

21:27

a map where it's going to go I can make

21:29

some really nice sites that should let

21:31

me play a really good game of disc off

21:33

this video is already really long so

21:35

we're going to do that in part two so if

21:37

you're interested in that make sure that

21:38

you subscribe so you don't miss it and

21:41

we're not done yet though because I have

21:43

a thing that can shoot discs really fast

21:45

when you have something that can make

21:46

stuff go really fast you have to put

21:49

stuff in front of it like I have to know

21:52

what happens if I put this machete in

21:54

front of a disc coming out of this we're

21:56

going to find out

21:59

I just got up it's way too early to be

22:01

filming but I wanted to show you what I

22:03

do every day I think this is one of my

22:05

superpowers and it can be yours too so

22:08

let me show

22:10

[Music]

22:13

you that's good no matter how busy I get

22:17

I spend at least 30 minutes a day

22:18

learning something new this is how I've

22:20

picked up a lot of my skills and one of

22:22

the tools that I use for this is called

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22:26

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each of these is just the right size to

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do maybe one or two a day and today I'm

22:45

doing a lesson on multivariant data

22:47

modeling I'm not very good at it I'm

22:49

getting better so let's get into it so

22:53

it just taught me some Theory and now

22:55

it's having me do some examples so you

22:57

learn and then you do which is just the

22:59

best way to learn it's part of the

23:01

reason I love making stuff I love doing

23:03

the examples are also interactive which

23:05

really helps you build intuition for

23:08

complex stuff after working through a

23:10

few more Concepts I'm

23:13

done I now know a little bit more and

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I'm telling you this is my superpower

23:19

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you brilliant for sponsoring this video

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and thank you for taking the time to

23:42

check it

23:43

out all right let's blast some stuff

23:45

with some discs it kind of goes without

23:47

saying but don't try this at home and

23:51

this is exciting enough that I invited

23:52

my wife over for the festivities are you

23:54

as excited as I am probably not but I am

23:57

excited no one knows what's going to

23:59

happen what do you think is going to

24:00

happen I think the frisbee is going to

24:02

it's called a

24:04

disc it's not going to go all the way

24:06

through or something I think it's going

24:08

to be the most amazing thing you ever

24:11

saw after me with this one you need to

24:14

go hide outside or something because you

24:17

don't want an errant disc to the belly

24:18

I'm willing to take an errant disc to

24:20

the belly I'll Flex when I fire and

24:23

we're going to do it in three two one

24:35

[Music]

24:42

[Applause]

24:54

that's got to go on the wall for sure

24:57

that is cool I was expecting that very

24:59

cool very

25:01

cool are you impressed with me yes

25:04

always are you impressed with this

25:07

mostly it sliced a disc in

25:10

half I think this could legitimately

25:13

make me really good at DIS off if you

25:15

count using a bazooka playing Disc Off

25:19

yeah it's not a discreet way to cheat

25:20

yeah I don't know how you'd hide this

25:21

under a trench coat or something exactly

25:23

what I was thinking anyway disc launcher

25:26

or all right we're done

25:33

[Music]

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Disc OffInventionEngineeringSportsDIYDisc LauncherAccuracySpeed ControlTechnical ChallengeInnovative DesignDisc Golf
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