Author Topic: Scratch built giant rc car  (Read 13325 times)

Offline KB

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Re: Scratch built giant rc car
« Reply #60 on: December 05, 2018, 08:20:25 PM »
Dave, I am not really sure. I think the feedback servo was causing some eratic signals.

Alex, thanks. There is a spring loaded damper similar to what you describe. It seems okay for now and my time is limited but I would be happy to share the model for further insight and analysis.

Florian, yes I see what youy mean. The worm wheel is plastic and as the rotation is not full, if a few teeth are broken, I could index it to a fresh set. There is a spring loaded piston damper built, in the hope of absorbing shock loads. The shock also has to be transferred through several pivot points before directly bearing on the worm. I don't know if this will stand up but If I ever get to the point of a test run, I will be testing everything until failure.

The testing facility;


Offline KB

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Re: Scratch built giant rc car
« Reply #61 on: December 17, 2018, 03:19:12 AM »
One of the test pilots checking out the roll cage.


Online Kim

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Re: Scratch built giant rc car
« Reply #62 on: December 17, 2018, 04:58:47 AM »
Now THAT's a great picture!    ;D
Kim

Offline Chester

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Re: Scratch built giant rc car
« Reply #63 on: December 17, 2018, 07:59:14 AM »
Seems like the young fellow has it figured, I know if I get my tongue 👅 held just right, my measurements usually fall just where I need them!

Offline KB

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Re: Scratch built giant rc car
« Reply #64 on: December 26, 2018, 04:40:45 AM »
Thanks Kim, Chester, you know it, if he doesn't have it just right it never works. #1 has been working on his welds.





cut, cope, tac continue....



Merry Christmas.


Offline AlexS

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Re: Scratch built giant rc car
« Reply #65 on: January 05, 2019, 11:54:27 AM »
You are never too young to start learning welding.

And great progression!

Offline KB

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Re: Scratch built giant rc car
« Reply #66 on: January 11, 2019, 12:47:14 AM »
Thanks Alex!

I need to learn too! As you can see;

Fuel cell;















We're running out of room! Still need to build the throttle/brake/servo, mount the battery and house the electronics.

.

Offline AlexS

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Re: Scratch built giant rc car
« Reply #67 on: February 20, 2019, 09:46:35 PM »
Nice aluminium welding job.

I've tried it with some remaining staff material. But I came up with the idea of ​​melting aluminum for castings rather than welding a bit. Any hinds or tips? I did used an standard equipment for tig welding of stainless steel.

Offline bent

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Re: Scratch built giant rc car
« Reply #68 on: February 21, 2019, 08:11:58 PM »
Stainless likes dc tig, you need AC tig for alumin(i)um.

Offline KB

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Re: Scratch built giant rc car
« Reply #69 on: February 23, 2019, 07:58:30 PM »
Thanks Alex, took me a few tries to chase down all of the leaks. Like Bent said AC for aluminum.

Got the chassis up in the rotisserie to weld it out.










Offline ddmckee54

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Re: Scratch built giant rc car
« Reply #70 on: March 06, 2019, 09:59:06 PM »
KB:

Any idea what the all up weight of that thing is by now?

Don

Offline KB

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Re: Scratch built giant rc car
« Reply #71 on: March 13, 2019, 09:50:46 PM »
Hi Don, I am guessing at least 150 lbs, when all is said and done.
Going to need an insurance policy!


Offline crueby

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Re: Scratch built giant rc car
« Reply #72 on: March 13, 2019, 10:16:00 PM »
Wow! Going to need a ramp down from the back of your car to drive it. Hmmm.... open the sunroof and jump it up the ramp?!
Awesome work!