Creator - Nicky04192
Project Started - Friday 22nd August
Project Finished -
Special parts?: RC Reciever, 2xMotors, 3 Diffs, Clutch, 91.8 x44 R.
Unofficial Parts used?: Well, a modded wire if that counts.
Updated:1st September 2008
Info: 

Overall
I was on this site, and tried to look for a good idea to make a drive+
steer for the huge RC reciever, I couldn't find one so I started to 
make my own. This is my latest project. This is a 4x4 chassis I am 
trying to create. In the past I had no luck. Look in my 'Ideas' folder
and look at the 4x4 chassis I tried to create. But FAILED. The wheels
used now will be the 91.8 x44 R.


Steering+Drive
This was the most difficult part of creating this chassis. I had to 
try reduce width so it doesnt look too wide. As you can see on
'steering_drive.jpg', I used that green part (I don't know what its 
called) to make the gears  be held secure. In previous attempts of 
creating a strong and compact drive+steer, I put the drive of the 
gears ABOVE the differential. I then couldn't fit all the parts together
so I had to move it to the bottom. All these gears used will cause alot 
of friction and thats why I decided to use worm gears to power it.

Power
This is powered by 2 motors which I got from the Supersonic RC. If 
you look on 'two_halves_attatched.jpg', the two axels on the left 
of the picture is sticking up. This is where these motors will be 
attatched. I have not found a way of securing the motors on yet but 
thats the least of my problems. This car is driven by 2 worm gears that
rotate the 2 8tooth then that rotates the single 24tooth gear which has
another 24tooth attached to it. This then drives the central differential 
and drives the 12tooth bevel gears to rotate  the final 2 differentials.


A little diagram to show the drive.
Key:
~~~= Wormgear
(Diff)= Differential
(##)= Number of tooth gear
---- = Axles 
...=Spaces

=REAR=                                         =FRONT=
Power Input--->~~~                         
..(Diff)(12)....(08)...............(12)(Diff)
........(12)----(24)-(24)(Diff)----(12)
........(12)....(08)...............(12)
Power Input--->~~~

Clutch
I added the clutch to the centre differential. If you don't know what
it does, its a really good way of transfering power to the front and back
and forth. If the clutch is attatched on th differential, it will force the power
to be spread out wide. This will make the wheels at the front and back 
move. If the clutch is moved away, the back can rotate on its own without
any of the front being rotated. The same goes for the front.
Attacted clutch - Mininimum of 2 wheels are driven. (1back and 1front)
Unattatched clutch - Minimum of 1 wheel is driven. (Front or back)

Other Parts
'part_1.jpg', this is a part is not secured from the bottom or the side.
This is secured by using beams attatched form the side. Whats the purpose
for this part? Well, this is mainly used to attatch the big heavy reciever as
you can tell from the 'L' shape beams I used. This is also used to stop the clutch
from moving too far and the getting unsecure.

MORE TO COME SOON!

Questions: Email me at nicky_wong(at)hotmail(dot)(com)
I will do a FAQ and or Q&A if I have been asked some questions.
Feel free to ask me anything about this model or any I created or future projects.