making RC Car with Carbon and Aluminum Parts

Рет қаралды 9,741

Күн бұрын

Пікірлер: 43

@AutomotiveCNC 5 күн бұрын

Hi, I design sports cars and buggies (real ones) for a living, and I would love to see your project getting more recognition. I strongly recommend you to implement the following features to your RC car to boost the performance and handling, as well as to reduce the tyre wear and potential failures that you experienced in the past: 1. Increase the distance between the mounting points of each A-arm where they are connected to the chassis. That will make them much stronger even if you use the same volume of 3d printed plastic. Thinner A-arms that closely resemble a triangle (from top view) are stronger than the current design whose mounting points to the chassis are too close to each other; 2. Use unequal length of the upper and lower A-arms, i.e. make the upper ones shorter and the lower ones longer. That will reduce the negative impact on the tyre patch during high-speed cornering and vastly reduce the chance for a failure of the tyre or breaking the suspension; 3. Set a negative Camber angle of 1 degree, which means that the upper end of the tyre must be closer to the center of the car, while the bottom must be slightly out. This also gives you better handling at high-speed cornering. The tyres on the outside end of the car take the majority of the load, so it's important to keep them vertical while the car inclines. 4. For the front suspension, replace the upper A-arm with two individual toe links to provide a virtual pivot on the upper joint. That will let you have variable Camber angle and Caster angle to the front wheels, hence a considerably better grip due to the reduced sideways tyre deflection. Due to the tight space there, you may need to use aluminum toe links to provide the necessary strength. Virtual pivot suspension is also known as Dual-pivot steering geometry; 5. For the rear suspension, implement the multi-link "Dax Rush suspension". It's a bit complex and tight, so it may require aluminum linkages for your RC car due to the size constraints, but it will provide a much better grip with the road and will keep the rear wheels vertical even when the car is heavily inclined during cornering; 6. Don't use an exact Ackermann angle. High speed cornering means that the outer wheel will slip and deflect sideways, hence the car must steer more to turn in the desired direction. Ackermann geometry dictates meeting the virtual points of the steering arms exactly at the middle of the rear axle. However, a more appropriate steering geometry is to shift the meeting point behind the rear axle with 30-50% of the wheelbase. For example, if the wheelbase of your car is 200 mm long, the virtual point where the the steering axles cross together must be approximately 60-100 mm behind the rear axle. 7. Use fillets for smooth transition of the 3d printed shapes and avoid inner sharp edges wherever possible. Sharp edges are weak points and the plastic tends to break easily exactly there. Hopefully this helps.

@hamburgerinc6995 5 күн бұрын

that's half a thesis omg! thanks so much for taking the time to share this advice, if I ever revisit RC car design in the future, I'll be sure to take your words into consideration. The virtual pivot point sounds interesting, I'll have to research how the toe linkages and all that stuff works. thanks again!

@AutomotiveCNC 5 күн бұрын

@hamburgerinc6995 , you are welcome. It will be interesting to see the difference in performance if you decide to update your project.

@marquiees Ай бұрын

Its so cool seeing the suspension in the rear compress as you accelerate, great camera angle!

@hamburgerinc6995 Ай бұрын

agreed, the fpv shots were pretty neat

@Technical_Failure 16 күн бұрын

Loved this project!

@licencetoswill Ай бұрын

I told you about that suspension hard point in your last video. it failed exactly as predicted.

@hamburgerinc6995 Ай бұрын

indeed 😅

@bengineerr Ай бұрын

Honestly Im Sad to see this proget go, but im exited to see new content

@hamburgerinc6995 Ай бұрын

@licencetoswill Ай бұрын

it'll drive much more smoothly if you offset the u-joints on each transaxle by 90 degrees to each other. look at a the uni joints on each end of a driveshaft and you'll see why.

@luigivargashennings5262 Ай бұрын

I just ended my engineering semester, and I used your design for my final project. Great work, there were some things my team and I had to improve and change in order to meet our project’s requirements, if you want to check out what we did we would happily share it with you

@luigivargashennings5262 Ай бұрын

We added a differential and a better gear train so you don’t have to push it to get it going

@hamburgerinc6995 Ай бұрын

@@luigivargashennings5262 I would love to see that! that's incredible. shoot me an email at hamburgerincofficial@gamil.com

@cipbarbu 26 күн бұрын

Hey, I really dig this design, I want to make one myself, but I have a bit of a hard time figuring out the exact models of the suspension and the bearings. Can you throw some links in here, or maybe on thingiverse?

@hamburgerinc6995 26 күн бұрын

Most of the parts on this car were scrapped together from many projects lol. The suspension is 60mm 1/8 scale I believe, the motor is an amazon motor, kv rating can be found by looking at it in the video, tbh I've no idea what it is. same with esc and battery. all bolts are m4. I advise caution if you want to build this lol. I'm not a professional engineer yet by a long shot, certainly lots of things need improvement with this design.

@cipbarbu 25 күн бұрын

@hamburgerinc6995 thank you, but I have already started printing it, we'll see what comes out. Worst case scenario, I get a nice piece to look at.

@hamburgerinc6995 25 күн бұрын

@@cipbarbu lol, best of luck!

@jessisagamer3929 Ай бұрын

Would it be better to reduce the gear ratio so it doesn’t need a push at the beginning?

@hamburgerinc6995 Ай бұрын

Oh for sure lol. That, and adding a sensored motor to get rid of the cogging and find what part of the revolution it's on.

@Me-ex6vu Ай бұрын

Hi, I am trying to build this car, its really cool! Do you have a list of parts (screws, suspension) that you used? Thank you

@hamburgerinc6995 Ай бұрын

@ToolsAreToys 5 күн бұрын

I dont understand how you got it to work so well without diffs.

@rc_chan8572 Ай бұрын

very nice ! what about making a basher monster truck 1/10 4 wheels drive ?

@itsVegaplays Ай бұрын

what size bearings are in the wheel hubs?

@hamburgerinc6995 Ай бұрын

2.1cm outer, 1.5cm inner I think

@kihgu Ай бұрын

Of course you can make it without expensive materials, I made a rc car myself and I used Petg for everything and just ended up with pretty beefy parts and mod 2 gears. Instead of just going from the worst material to the “best” in terms of 3d printing you can allways use a better material like pstg from the beginning and doing more revisions before making them from metal

@kihgu Ай бұрын

Basically use your brain and not your wallet

@marcobassini3576 Ай бұрын

The problem of this car is not the material (humble PLA is perfectly fine for a RC car), but the horrible design, clearly done by somebody that has not any mechanical skill and general engineering knowledge (let alone on cars mechanics!). One of the worst RC car ever on KZbin. And being still in this miserable state after 5 months of iterations says it all ......

@Technical_Failure 16 күн бұрын

@@marcobassini3576 What colour is your rc car?

@BraydenWolframe Ай бұрын

Currently working on 3 wheeler RC for my mechanical engineering final project. I love seeing others tinkering around with this amazing hobby! Great work!

@hamburgerinc6995 Ай бұрын

Thanks so much, best of luck on your project!

@solas_tech Ай бұрын

Do you mind attaching your hardware material please, I wanna remake it :)

@hamburgerinc6995 Ай бұрын

everything I used was from amazon, I'm not even sure what most of it is anymore since I've used the same electronics for many projects. I know that the motor is a GoolRC 4076 2000KV 4P Sensorless Brushless Motor. If you are trying to make this car, caution advised I'm not a professional, I'd recommend buying a sensored motor so that it doesn't cog. The ESC just needs to accomodate the motor you use and choose whatever battery you want. the servo is a typical cheap 20-25kg servo from amazon too. shocks are 1/10 scale 60mm I believe. I think I mentioned that somewhere in the last video maybe, idk. everything else is printed

@solas_tech Ай бұрын

@hamburgerinc6995thank you so much

@Jrm5814 Ай бұрын

what about making a slower rock crawler? :)

@hamburgerinc6995 Ай бұрын

have yet to explore that side of RC Car's yet, could give it a look for sure

@WOTKyzmich Ай бұрын

It's funny to watch someone print working models with PLA and be surprised that it keeps breaking. PLA IS NOT AN ENGINEERING PLASTIC!!! To prevent it from breaking, you need elastic parts made of engineering plastics.