New hi-speed project

[lutach]

Originally Posted by BrianG

Well, I have a Neu 1515 2.5d coming! With a motor kv of 1700, 8s lipo should be a decent match for 50k motor rpm. May go with 9s for 56k rpm, dunno yet. Either way, I'm gonna need a special balancer setup - probably pick up two Commonsenserc balancer units and make a custom 12s balancer. Dual LBA10s is just too much wire for my liking.

Also got another Koolflight UBEC. Keeping the voltage under 40v lets me be able to use the UBEC, otherwise, I'd need a receiver pack or some special regulator design. Technically, I probably could get away with 10s since it's 37v nominal, 42v max, but that's too close to the max input for the UBEC.

I haven't done much progress on the project though. Cut the body out and test-fitted it. Man, that thing is HUGE! The plastic guards don't even come close to touching the sides of the body (at least 1" gap) and there is so much room in front and rear of the chassis that I could easily fit the ESC, Rx, UBEC there. Might put the ESC in back on a custom tray and the Rx/UBEC up front. That should help radio range by keeping the motor wires quite far from the antenna and other low-level signal wires.

Made some fiberglass flat pieces to re-fab the servo tray, but the fleece is a little too flexible I think. So, I'm gonna pick up some glass matting, or a denser cloth and try that. Fleece is nice for curves and such because it stretches in all directions, but not needed for this. Maybe for the battery tray...

Brian,

There are some HV BEC out there: http://www.dimensionengineering.com/VHVBEC.htm and http://www.western-robotics.com/herculesHV.html. They also seem a bit smaller than the Koolflight unit.

[BrianG]

Originally Posted by lutach

Brian,

There are some HV BEC out there: http://www.dimensionengineering.com/VHVBEC.htm and http://www.western-robotics.com/herculesHV.html. They also seem a bit smaller than the Koolflight unit.

Even better! I'll keep those in mind if I decide to go higher V. And I don't mind the Koolflight's size really. I have TONS of room on this thing!

[lutach]

Originally Posted by BrianG

Even better! I'll keep those in mind if I decide to go higher V. And I don't mind the Koolflight's size really. I have TONS of room on this thing!

Ok. Keeps us posted with pictures and a video of your beast running.