Pilot Operating Handbook
Cavalon
SECTION 4
NORMAL PROCEDURES
AutoGyro_POH_Cavalon 915iS
Revision 1.0 – Issue Date 08.MAY.2019
4-10
4.8
Take-off Procedure
Check relative wind
With right hand, maintain control stick in a forward position
Switch pneumatic mode selector to FLIGHT and return to brake with left hand
Hold wheel brake without having locking pawl engaged
While holding wheel brake adjust throttle to give 2000 RPM
Activate and hold pre-rotator. To reduce lateral stick force during prerotation, adjust
the forward stick position by pulling it slightly aft and to the right
Let pneumatic clutch fully engage (stabilization at about 100 rotor RPM).
If necessary release pre-rotator button momentarily and press again to maintain
engine RPM within green arc, respectively to prevent engine from stalling!
Carefully increase throttle to increase rotor rpm to that required for the take-off.
Minimum rotor rpm for take-off is 200, maximum achievable is 320. Between 280 and
320rpm it is possible that the high engine rpm and resultant propeller static thrust
generated may be causing the aircraft to slide with wheels locked – depending on the
runway surface and payload. If sliding starts reduce power! If the rpm is not sufficient
for take-off, abort and restart as required.
In case of a slipping clutch (CLUTCH light), reduce power and match engine rpm to
rotor rpm.
When the minimum required rotor rpm is reached, release pre-rotator button.
Gently - but smartly - move control stick fully aft (stick travel ~ 1 sec.), see 4.9
In a strong headwind be prepared to stop movement as the nose wheel rises!
Release wheel brake with throttle unchanged
Monitor rotor speed and progressively increase throttle to take-off power
If the CLUTCH light is flashing, check that the rotor rpm is sufficient and consider
aborting the take-off run.
WARNING
Before activating the pre-rotator, check area is clear.
WARNING
Prior to releasing the wheel brake, make sure that the control stick is
sufficiently aft. A take-off run with flat rotor system may have cause a very
serious accident.
WARNING
The 915iS generates high thrust loads, meaning fast acceleration and rapid
take-off.
Take off with low rotor rpm and high thrust WILL result in blade flap!
Take care to understand and manage the high power available!
