Spektrum SPMAR7200BX - Manual (Page 4)

4
Governor parameter adjustments
To enter the Parameter Menu:
1. Once the AR7200BX is initialized, press and hold the setup button until
the LED flashes next to menu point (a).
2. Release the setup.
3. Press the setup button once to move to the next menu point. The 8 menu
points ( a through H) in the Parameter Menu are unchanged. The new
menu points for governor functions are I through K.
4. Press the setup button once at menu point (K) to exit the Parameter Menu.
parameter menu I
Throttle Response In Unloaded Conditions:
Adjust Parameter I to prevent the governor from over speeding the rotor head
or applying too much throttle when your helicopter goes from a loaded to an
unloaded condition.
• Engines in larger 700-size helicopters should use the Low setting.
• Smaller .30-size engines should use the Aggressive setting.
parameter menu J
Initial RPM Spool-Up Rate:
The initial spool up rate is set in RPM/second, and defines how quick the
RPM increases from the point where the governor is engaged, up to the final
set RPM. This setting only applies when the governor activates by slowly
increasing the throttle, otherwise the bailout function may activate (see
Parameter K: Bailout Function for more information).
parameter menu K
Bailout Function:
The AR7200BX Governor supports an intelligent autorotation bailout function.
When the throttle channel value changes from below 25% to above 60%
very quickly, the governor selects a faster spool-up rate to compensate for a
recovery from an autorotation (bailout).
Changing the settings in the parameter menu adjusts how aggressively the
throttle increases after the bailout is activated. If this parameter is set to
“Bailout OFF”, the special autorotation bailout spool up is disabled and the
default spool up behavior is used.
Status-LED
oFF PC Set
purple Solid Low
red Flashing Moderate
red Solid Medium
Blue Flashing Fast
Blue Solid Aggressive
Status-LED
oFF PC Set
purple Solid 50 RPM/s
red Flashing 100 RPM/s
red Solid 200 RPM/s
Blue Flashing 300 RPM/s
Blue Solid 400 RPM/s
Status-LED
oFF PC Set
purple Solid Bailout OFF
red Flashing Smooth
red Solid Normal
Blue Flashing Increased
Blue Solid Heavy
CaUtIon: The bailout function enables the governor to bring the engine back up to speed quickly. The blade bolts MUST be very tight or the blades may swing
back under acceleration and cause a boom strike. If the helicopter has a boom strike in the air, it will be unrecoverable and the helicopter will fall to the ground.