Thank you, sir! My first subject will be about unreliable Vtail servos.
I got my Nimbus VTOL V2 from Foxtech 3 or 4 months ago. It’s the T12 version, because I liked the compactness of the Skydroid T12 radio that comes with it. After two successful flights, and while preparing for a third, I noticed a Vtail servo twitching like crazy. I sent a video of this to Foxtech, and they sent me an entire Vtail assembly, with servos installed. It came with no instructions, so I installed it, made sure the tail surfaces moved in the proper directions, and launched.
This resulted in a crash wherein the Nimbus just tracked straight toward the ground, without any response to my inputs. Foxtech analyzed my logs, and told me that the servos were not properly calibrated. I’m new to airplanes, so I was unaware they needed that. Anyway, one vtail surface moving up too far created a tail stall, and the plane went nose down.
For those of you who haven’t experienced this, be prepared for Foxtech’s cheapo servos to fail. And when you replace them (hopefully with better ones), be sure to adjust them in the Parameters settings (Servo Min, Max, and Trim). Foxtech says they put theirs at 30 degrees up and 30 degrees down. And, if you’re concerned about your CoG being too far forward, and can’t get it to move back, add 3 to 5 degrees up to the trim, so the tail will be pushed down in forward flight.
I imagine that me teaching any of you guys about how a Nimbus works is like teaching water how to flow downhill, but perhaps someone will find this information useful.
I hope you guys are doing well. Sorry for the long post; I’ll try to make them shorter in the future.