Thanks for your input. Romeo, good copy on the battery math. I have a 12000mah, 12-24C, 6S lipo that I’ll try for single-battery ops. By putting an XT90 connector on it, I bet it’ll have plenty of power for hovering and significant cruise flight. 1 takeoff and 1 landing depletes a 2200mah battery to 35%, so I’ll do the math to figure out max cruise flight time.
Mr. Covey: Thanks for looking at my logs. Yes, it’s a FoxtechFPV Nimbus VTOL V2. The only mods I’ve done to it are an EPP nose cone, which is maybe 10% heavier than the EPO cone; 70 grams of weight on the tail for better CG; and a pair of APC 13x8 propellers on the front. Also, my elevation here is 3500 feet MSL, so the thinner air, combined with some added weight, and possibly less efficient props than the original Gemfan woodies, may explain my 80-90 amp draw in hover.
I believe I’ll get rid of the battery switch and run one battery. I think that Foxtech installed these and pushed them on the V2 Nimbus, and perhaps didn’t do as much research on reliability as they could have. I think it adds a complication to the process of VTOL flight, and if it reboots my Pixhawk, it does me no good.
As far as the small battery being connected after reboot, that may be because the instant I saw the Nimbus flounder in transition, I popped it back into Qhover mode, which would have re-connected the smaller battery.
Anyway, I have all the parts I need to reassemble this feller, so I’ll put it together tonight and launch it again tomorrow. I’ll let you guys know how it goes!
Thanks again for all your help and input; we’ll get this thing off the ground eventually.