Ofna Ultra GTP - Rev 2.

[BrianG]

After revision 1 of my "high speed" GTP failed, I decided to redesign it. 10s was just too darn fast and uncontrollable. The two speed setup was cool, but I missed having reverse. Plain and simple; I didn't have much fun with it.

As far as components go, just the typical fare:

> Mike's new 5s 5Ah lipos.

> Neu 1512/2.5d motor. Using Mike's font motor spacer plate (mainly to save the threads on the motor). I made a rear cover out of plastic and heatshrunk it in place.

> I still don't think the MMM is smooth enough, so I opted for another Quark 125B. I did the "internal thermal mod" and added two 330uF/35v caps. Since the chassis top plate is aluminum, I am using that for additional heatsinking; works pretty good too! I really love this ESC - smooth as silk. Too bad they're so darn expensive, don't do 6s well, support sucks, and they do tend to run warm. The ZIP tie on the ESC is not really needed, it's just there as a safety net in case the thermal epoxy lets go...

> DimensionEngineering ParkBEC.

> RCMonster battery tray. Had to modify the spacer part of the tray so it sit's a little more over the mudguard to give the spur some room.

> I used the same receiver box idea I used with my MBX5/CORR project (if it works, stick with it). The BEC sits in an aluminum "shield" to prevent any stray noise.

> 51 Ofna spur on the single speed setup. 16T to 18T pinions for speeds from ~45-50mph depending on how fast I wanna go.

And for pics:











Anyway, nothing special. Just wanted to share...