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BrianG · 04:36 PM

All,

Thanks for the responses.

Looks like I'll be getting the full CNC'd metal tranny case and devising some sort of lightweight spacer where needed.

As for the rear motor mount; I too think a rear motor brace would be nice because the XLs are kinda long. I'm sure I can come up with some sort of bracket. Does anyone know the length measurements of L and XL motors? Judging from diufferent pics, it looks like the XL is about 1/2" to 3/4" longer than the tranny case. I won't be getting the motor for a little while yet, but I can at least start on the bracket.

Judging by what others are running and such, I think I've decided on the 9XL or 8XL motor. Leaning more towards the 9XL just for longer runtimes despite the slower speed.

MetalMan,
I'm not so sure is isn't switching. The fact that there is no heatsink on the regulator circuit almost requires it be switching - there is no way such a small device could dissipate around 54w without a heatsink: worst case device dissipation @20 cells, @ 3amps = (24v - 6v) * 3amps. The heatsink for the entire device would almost be too small just for that! Anyway, I might just use a discrete BEC like Dafni suggested. It would just be nice to have the circuit as simple as possible - I'm only using one servo after all (Hitec HS-5945MB for steering).

I did a little more work this morning:

I added a receiver box which is just a RadioShack project box (item# 270-1801) cut lengthwise because it was too wide. I then glued a new backing. The top is held down with screws, I just didn't feel like putting them in. There should be enough roo for a BEC and maybe an on/off switch.

Also, I made a motor controller mount Dafni-style (once again). It is a bit thin, but seems sturdy enough. I might re-do it using 1/16" aluminum. I even found a spare grommet laying around for that finishing touch. :)

Pics:

	(#25)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	11.20.2005, 04:35 PM All, Thanks for the responses. Looks like I'll be getting the full CNC'd metal tranny case and devising some sort of lightweight spacer where needed. As for the rear motor mount; I too think a rear motor brace would be nice because the XLs are kinda long. I'm sure I can come up with some sort of bracket. Does anyone know the length measurements of L and XL motors? Judging from diufferent pics, it looks like the XL is about 1/2" to 3/4" longer than the tranny case. I won't be getting the motor for a little while yet, but I can at least start on the bracket. Judging by what others are running and such, I think I've decided on the 9XL or 8XL motor. Leaning more towards the 9XL just for longer runtimes despite the slower speed. MetalMan, I'm not so sure is isn't switching. The fact that there is no heatsink on the regulator circuit almost requires it be switching - there is no way such a small device could dissipate around 54w without a heatsink: worst case device dissipation @20 cells, @ 3amps = (24v - 6v) * 3amps. The heatsink for the entire device would almost be too small just for that! Anyway, I might just use a discrete BEC like Dafni suggested. It would just be nice to have the circuit as simple as possible - I'm only using one servo after all (Hitec HS-5945MB for steering). I did a little more work this morning: I added a receiver box which is just a RadioShack project box (item# 270-1801) cut lengthwise because it was too wide. I then glued a new backing. The top is held down with screws, I just didn't feel like putting them in. There should be enough roo for a BEC and maybe an on/off switch. Also, I made a motor controller mount Dafni-style (once again). It is a bit thin, but seems sturdy enough. I might re-do it using 1/16" aluminum. I even found a spare grommet laying around for that finishing touch. :) Pics: Last edited by BrianG; 11.20.2005 at 04:36 PM.