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_dV
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Join Date: Sep 2009
Location: Australia
05.08.2010, 08:15 PM

Early layout testing. I bought some 3mm MDF to use for further prototyping and thats what is bolted up in the pic. The final layout will be very similar to this. The steering servo will be mounted upside down as i wanted to incorporate the RPM Savage X skidplate mod and the bottom mounted servo would not fit with the skidplate cross brace. The receiver box will also likely be moved to the outside of the TVPs. I planned to use a center diff (under where the receiver box is in the pic) but this later changed when i discovered the slipperential . Also decided on using a Tekin RX8\T8 system after probs with my MMM.



More to come when i have time.

Last edited by _dV; 05.08.2010 at 08:51 PM.
   
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_dV
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05.10.2010, 05:55 AM

After I discovered the slipperential and found out what it was i decided to try it over a straight up center diff. Spur is 46 tooth to keep it mounted low. I plan to use a 14t pinion with a 1550kv motor.

Assembly. Used 100K diff fluid as this will be basher.


Had a few probs during assembly.
1) Slipper pads didn't fit and they required a fair bit of filing
2) Burs around the outside of the thrust washers ..more filing
3) Was very difficult to get the pin in the spur gear side diff cup, there just wasn't adequate room.

It's also leaking on the non-spur side so i will have to take that side off and try to fix.

Slipperential mounted on test MDF\crossbrace bracket in place in the chassis. Diff mounts are Vorza\Hot Bodies. I'd really like custom single piece aluminium mounts that hold a bearing and bolt directly to the TVPs ..maybe later.

Last edited by _dV; 05.10.2010 at 06:00 AM.
   
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_dV
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05.11.2010, 08:59 AM

The battery tray from the Vorza looked like a good way to keep the battery secure in the TVPs. Took me some time to track one down but unfortunately once i got it i found it was unsuitable. The expanded areas on one end for the battery wires meant it wouldn't quite fit between the TVPs. The way it mounts also raised the battery up more than i had hoped (see second pic). The holder mounting holes are also not properly asymmetric in that if you wanted to rotate the holder 180 degrees to have the battery wires at the other end you couldn't use the same holes in the mounting surface.



Eventually i found these Tekno battery trays. They are simple, light and should do the job. They take batteries up to 51mm wide and the longer one can handle batteries up to 165mm long. The long one fits in the new XL layout nps
   
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