arbilab
Mar 11, 2009, 03:41 PM
Got two HLI helis, V4 and HBFP. V4 is calm and submissive (heli whisperer). Does what it's told.
HBFP does what it wants. Inside or out (dead calm), makes widening CCW circles. AKA, apparent TBE. It generates errors faster than I can correct them. I've run this through the RCGroups HBFP thread, checked and rechecked everything they told me.
Dismounted, blades are dead parallel. Dismounted, main rotor is dead balanced (between glasses). Seated on the bearings (3 times), and free to pivot.
Flybar components positioned symmetrically within <1/16". Swash and flybar dynamically level (in operation w/o main rotor assy).
Rotor operating w/o main blades, no vibration at all. Rotor operating with MB assembly, vibration nominal to excessive (short of extreme), varies and not just with speed.
Out of box there was a STATIC blade height difference of 3/8". Static, as in measured from a fixed surface to leading edge. Reversed blades, same SIDE was high (as distinct from same blade). Got this down under 1/4" statically, and dynamically (running) 1/8", but it won't zero. Got a blade mount coming when it gets off backorder 3/20, in case original part was malformed.
OK, seems I've checked about everything. Except the pilot. I know FP has inherent instabilities that CX don't. But I've also seen one fly in a space comparable to mine (small) and it didn't constantly generate huge errors like this one seems to. I'm OK with balancing a marble on glass, but this is like balancing a marble on a basketball.
Did you see this going from CX to FP? Am I just klutzing, making the same control error every time? Or is something amiss with this craft? I don't want to send it back. I love it, got sweat equity in it, and I'm a problem solver by profession. But I've run out of ideas, other than "keep trying". If EVERYone goes through this, then I shall too. But if I'm fighting an alignment problem with the sticks, I need to know that and fix it.
HBFP does what it wants. Inside or out (dead calm), makes widening CCW circles. AKA, apparent TBE. It generates errors faster than I can correct them. I've run this through the RCGroups HBFP thread, checked and rechecked everything they told me.
Dismounted, blades are dead parallel. Dismounted, main rotor is dead balanced (between glasses). Seated on the bearings (3 times), and free to pivot.
Flybar components positioned symmetrically within <1/16". Swash and flybar dynamically level (in operation w/o main rotor assy).
Rotor operating w/o main blades, no vibration at all. Rotor operating with MB assembly, vibration nominal to excessive (short of extreme), varies and not just with speed.
Out of box there was a STATIC blade height difference of 3/8". Static, as in measured from a fixed surface to leading edge. Reversed blades, same SIDE was high (as distinct from same blade). Got this down under 1/4" statically, and dynamically (running) 1/8", but it won't zero. Got a blade mount coming when it gets off backorder 3/20, in case original part was malformed.
OK, seems I've checked about everything. Except the pilot. I know FP has inherent instabilities that CX don't. But I've also seen one fly in a space comparable to mine (small) and it didn't constantly generate huge errors like this one seems to. I'm OK with balancing a marble on glass, but this is like balancing a marble on a basketball.
Did you see this going from CX to FP? Am I just klutzing, making the same control error every time? Or is something amiss with this craft? I don't want to send it back. I love it, got sweat equity in it, and I'm a problem solver by profession. But I've run out of ideas, other than "keep trying". If EVERYone goes through this, then I shall too. But if I'm fighting an alignment problem with the sticks, I need to know that and fix it.