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Thread: Crazy axles idea design

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Old 01-13-2018, 06:35 AM   #1
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Default Crazy axles idea design

Hi, I am new to the forum but not to the hobby. I have been designing, constructing and piloting RC cars, planes and helicopters. I designed my first RC car when I was 13 years old and that was 35 years ago...

I lately come interested on Rock-Crawlers, mainly on the superclass, because I think it is the more technically advanced.
After some research I come to some conclusions about Crawlers that I hope they are correct, you let me know:
- Manny of characteristics of a Rock-Crawler are very different than from a speed-racing car.
- Vehicle weight should be as low as possible.
- CG should be as low and forward as posible. In order to achieve that weights are installed on the front wheels.
- As much suspended mass the better.
- As much turning radius the better.
- Brushless motors are not well suited for the task unless they are sensored (difficult to find)

So in order to meet those parameters I come up with this design/idea of how to install all equipment (weight) inside of the wheel rim. It is just a quick render and before going further with it i will like that you have a look to it and give your opinion/suggestions and if I you think it can work.
If I go forward with this I will need some assistance on setups and other details and hope you can help me.
Let me know if you can see the pictures, if not I will link them differently.





Equipment planing to use:
4 x 380/385 brushed motors
4 x 20-25A ESCs
2 x 7.4V (2S) 800-850mAh batteries (one on each front wheel)
4 x 15-20Kg Standard size servo
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Old 01-13-2018, 06:41 AM   #2
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Default Re: Crazy axles idea design

Sound like motor on wheel system ?
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Old 01-13-2018, 06:58 AM   #3
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Default Re: Crazy axles idea design

Here ya go.. a little inspiration!

Bc-brian of Lattice Innovation (a vendor here, that makes the Sickest hubs on the market, Shift hubs) designed this little beauty..

BC-Brian's Real life Unlimited MOW with a dash of something crazy
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Old 01-15-2018, 07:16 PM   #4
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Default Re: Crazy axles idea design

Quote:
Sound like motor on wheel system ?
Yes, that is right Teng MOW system.

Quote:
Here ya go.. a little inspiration!
Bc-brian of Lattice Innovation (a vendor here, that makes the Sickest hubs on the market, Shift hubs) designed this little beauty..
Thank you Bc-brian, I seen your rig, it is great, it was quite inspirational for this idea. Actually after seeing/reading you post I decided to go brushed way instead of brushless.
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Old 01-15-2018, 07:36 PM   #5
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Default Re: Crazy axles idea design

Calculating the steering geometry, actually not an easy task. Thanks that Ackerman Geometry is not needed



About 70, not bad I think.

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Old 01-17-2018, 08:14 PM   #6
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Default Re: Crazy axles idea design

Gear box taking shape. I will 3Dprint it.
Now needs servo, and battery support, Kingpin hears and some more details.


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Old 01-17-2018, 08:26 PM   #7
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Default Re: Crazy axles idea design

What size wheel are you using to be able to fit a 380 motor and gear box inside like that?
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Old 01-18-2018, 07:46 AM   #8
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Default Re: Crazy axles idea design

Quote:
What size wheel are you using to be able to fit a 380 motor and gear box inside like that?
Wheel rim diameter is 152.8mm (around 6") and tire diameter 205mm (around 8")
Moreless the same wheels sizes as other Superclass that are around.
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Old Today, 08:23 AM   #9
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Default Re: Crazy axles idea design

First iteration of the gearbox finished, lets see if I can print it latter today, in order to see if everything fits and check tolerances...

Inner side (Servo, motor, battery)




Outer side (Space for the ESC and weight box)

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Old Today, 10:23 AM   #10
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Default Re: Crazy axles idea design

Its already been done. You might want to do some reaearch.
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Old Today, 01:11 PM   #11
I wanna be Dave
 
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Default Re: Crazy axles idea design

Quote:
Originally Posted by Ditchrat View Post
Its already been done. You might want to do some reaearch.
Everything has been done but there is always room for someone else to try something similar.
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Old Today, 09:38 PM   #12
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Default Re: Crazy axles idea design

Keep up the good work, always to see cool stuff that continues to innovative.
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