Anybody own/flown the Draganflyer Predator B UAV? I have the barebones ARF with Speed 400, no cameras. Just wondering about some issues with CG.
The plane manual specifies a 600mah 8.4v nicad. I'm using either a 600mah 7 cell 8.4v Nimh (3.2oz.) 750mah 7 cell 8.4(3.5oz.) or 1100mah 7 cell 8.4v Nimh(5.4oz.).
The manual states CG is to be measured with ventral fin attached, canopy on and wings off, using the aluminum spar as CG. It states the attitude should be slightly nose down. With any of those batteries, the nose is definitely more than slightly nose down. I'm using a micro receiver and 9 gram servos, 20a esc and 4 gram v-tail mixer.
Does anybody know if it is airworthy with the recommended smaller battery, even with nose heavy? I really don't want to make toothpicks the first time out, compounded by the fact it is hand launch only.
The only way I've found to get it to balance out nicely is by attaching wireless camera pod and 9v battery which adds another 4 oz. to the flying weight, somewhere along the bottom between the rails. This seems heavy.