Author Topic: Scratch built giant rc car  (Read 29105 times)

Offline KB

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Scratch built giant rc car
« on: September 11, 2013, 03:51:07 AM »

I haven't built any model engines lately, but I have done a bit of model engineering.

Rear differential and drive-train;













Servo saver and steering linkage;







Shocks,



















Various parts;















Coping a tube in the lathe;









Hopefully, one day, it will all come together to look something like this;










Have fun out there!

-Kevin



Offline metalmad

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Re: Scratch built giant rc car
« Reply #1 on: September 11, 2013, 04:18:49 AM »
Wow, How nice is that
Love it  :praise2: :praise2:
Pete
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Offline swilliams

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Re: Scratch built giant rc car
« Reply #2 on: September 11, 2013, 06:38:09 AM »
Innovative and cool  :ThumbsUp: :ThumbsUp: :ThumbsUp:

Steve

Online steamer

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Re: Scratch built giant rc car
« Reply #3 on: September 11, 2013, 11:04:54 AM »
Wow Kevin!    What is powering that beast?......looks like a quad bike engine and transmission! :o

Dave
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Offline MuellerNick

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Re: Scratch built giant rc car
« Reply #4 on: September 11, 2013, 11:48:23 AM »
Quote
What is powering that beast?


Looks like a Honda Monkey (or SS 50) knock-off engine (available with more than just 50 ccm). Cheaply available from China.


Parts look very professional made!




Nick

Offline b.lindsey

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Re: Scratch built giant rc car
« Reply #5 on: September 11, 2013, 12:15:01 PM »
That is really some amazing work there Kevin. Beautifully machined parts too!!

Bill

Offline V 45

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Re: Scratch built giant rc car
« Reply #6 on: September 11, 2013, 12:41:34 PM »
Again Kevein....GREAT WORK !! That will be pretty cool for your son to crash  :naughty: !! But by the looks of the construction he'll have a hard time doing it !!
  Dave
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Offline KB

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Re: Scratch built giant rc car
« Reply #7 on: September 11, 2013, 05:00:34 PM »

Thanks a lot everyone.

Yes it is a Honda clone. I believe Honda started producing these engines when they came out with the Cub or Passport. The most produced motorcycle scooter in history.
The one I have is a 70cc, 3speed auto. It came from a Chinese quad I was given. It needs a complete rebuild. (think disposable engines) I think up to 110cc uses the same crank-case.

I put a real Honda, 70cc, 3 speed, manual in this contraption;






Quote
That will be pretty cool for your son to crash  :naughty: !! But by the looks of the construction he'll have a hard time doing it !!

I'm not too worried about the car, but whatever gets hit! I'm going to try and set-up a triple redundant fail-safe/ kill switch system. 2 electronic and one mechanical.
I should probably take out an insurance policy too. It will be about 4 feet long and weigh well over a hundred pounds.

Cheers!


Offline Tennessee Whiskey

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Re: Scratch built giant rc car
« Reply #8 on: September 11, 2013, 06:57:41 PM »
Looks great Kevin. I love the "huge" RC stuff. Aircraft with 8' wing span and this kind of stuff.  Dave, this thread may need to be off limits to William. I'm waiting on a Wallaby 8)

Whiskey

Offline smfr

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Re: Scratch built giant rc car
« Reply #9 on: September 11, 2013, 07:41:06 PM »
Wow, awesome stuff!

The front end looks a bit fragile. Any reason there aren't struts across the very front of the frame? Or did you just slice off the front for the rendering?

Simon

Offline jwcnc1911

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Re: Scratch built giant rc car
« Reply #10 on: September 11, 2013, 09:42:50 PM »
This is freakin awesome!
----------
JW

Offline KB

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Re: Scratch built giant rc car
« Reply #11 on: September 12, 2013, 04:59:01 PM »

Thanks all,

Simon, You are right, there will be cross bracing up front and a bumper of some sort. I just didn't work it all out ahead of time. I want to make sure I am happy with the steering linkage before I fill it in.
Also I may need room for a battery and electronics, maybe the fuel tank as well...

I made full size templates for bending.

First set my very expensive angle o' meter;




Then set the starting point of the bend. A sample bend is marked to a corresponding mark on the benders' die. It is placed so that the bend touches the outside of the bend and the mark is transferred to the template;




Then the mark is transferred to the stock;




Then into the bender and bent to the previously set angle;




Then it is notched and back to the template to be marked for final trimming;





I don't have a proper bender, but your standard import bender for which I have made quite a few dies.


For pieces too large to fit the lathe I have this tube notcher, which I made a long time ago;






Cheers,

KB

Offline KB

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Re: Scratch built giant rc car
« Reply #12 on: February 27, 2018, 04:08:47 PM »
Well this project was shelved while I raised my two sons, racing BMX with them and doing a lot of home renovations.

It is time to get back out in the shop!

<a href="https://www.youtube.com/watch?v=MiKhhqmCz0s" target="_blank">http://www.youtube.com/watch?v=MiKhhqmCz0s</a>








.

Online Vixen

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Re: Scratch built giant rc car
« Reply #13 on: February 27, 2018, 04:30:48 PM »
Hi KevinB

That's an amazing vehicle. A full size racer, but in miniature.

I watched the video and have a question about that steering servo. It looks like you are using a window winder motor with a slave servo to give position feedback. Am I correct? The next question is about what are you using for the electronics module. Who is the manufacturer ans supplier?

Mike
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Sometimes, it can be a long and winding road

Offline Allen Smithee

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Re: Scratch built giant rc car
« Reply #14 on: February 27, 2018, 04:39:40 PM »
If you're going to run it off-road won't you need a lock for that diff?

AS
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