Setting up the mini VBar governor for the first time can be a little confusing.
Here are some notes from my setup experience with a flybarless T-Rex 450
mini VBar with with two phase sensor plugs. + and - power plug into RX C. The
sensor wire goes to the top pin of RX A.
Heli: Align T-Rex 450 Pro
ESC: BL35X (Align Stock)
Motor: BL430SP (Align stock)
Hyperion RDU Phase Tachometer HP-EM2-TACHBL from allerc.com
Head: Align FBL
Preset channel from receiver: 1
Output socket on VBar: RX B
Max Headspeed: 3000
Gear ratio: 11.538 (150/13)
Sensor configuration: 3 (That is six "poles"--the
six magnets around the inside of the motor's "can," not to be confused with the
nine stator windings--divided by 2)
(The next two settings are probably very
transmitter-dependent and included just for reference.)
Motor off: -92% <-- the level at which the motor
*just* starts when you turn off Throttle Hold with the throttle in IU.
Motor on: 81% <-- there's a clearly audible
change at 80%. At 81% it's going all out (seems low though...)
Autorotation bailout: I haven't
enabled this yet, but I've been experimenting with it. The electric governor
setup pages at
www.vstabi.info/en say that if you set Throttle Hold
to anywhere from -90 to 0, the auto bailout feature will be enabled. Setting my
DX6i Throttle Hold to 16% (which gives -73% in VBar's "Output socket on VBar")
appears to be the threshold of consitently "arming" autorotation bailout.
DX6i Throttle Hold to 20% throttle arms Autorotation Bailout reliably
which I can tell because the
governor ramps up to full speed in 2 seconds instead of 10).
Calculate how much the headspeed changes for your Max Headspeed setting with
calculator, or just just divide the max headspeed value by 50 to get the
change increment for each 1% throttle change:
3000 RPM Max Headspeed / 50 = 60 RPM headspeed change for each 1% throttle
IU Throttle: 97% <-- This gives a "requested
RPM" of 2820 RPM.
Normal Throttle: 92% <--This gives 2520 RPM.
Transmitter throttle % and
resulting headspeed with VBar gov "Max headspeed" set to 3000
% Throttle RPM
Requested headspeed goes all the way to 0 at 50% throttle. (Note, however, that
efficiency is best when a motor is running close to its maximum speed.)
0% to 50% throttle: 0 RPM
Align BL 35X ESC programming:
Battery protection: High cutoff
Throttle response speed: High
Voltage: 6 v
The throttle is LIVE as soon as you select "Electric."
was behaving so strangely that I went back and read the instructions.
You have to hit Reset after you select "Electric." You really
point in the setup you control the throttle with the collective stick. Make sure
your pitch is set linearly from 0 to 100 or you will get weird results.