AutoGyro_POH_Cavalon 915iS Revision 1.0 – Issue Date 08.MAY.2019
The manual is not a substitute for competent theoretical and practical training on the operation of this aircraft. Failure to adhere to its provisions or to take proper flight instruction can have high-risk consequence
4.1 Airspeeds for Safe Operation Climb … 116 km/h (70mph, 60KIAS) IAS
Best rate of climb / best endurance... 100 km/h (60mph, 50KIAS) IAS
Best range ... 110 km/h (70mph, 60KIAS ) IAS
Approach ... 100 km/h (60mph, 50KIAS) IAS
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 considerØ aborting the take-off run.
4.9 Take-off Run
Check engine has reached full power for take-off. Otherwise, abort take-off
Commencing the take-off run with high rotor rpm (280-320) and the stick fully back means that there is a high starting drag load. The aircraft has to accelerate to approx. 50mph (depending on loading) to take off, and achieve the rotor rpm for the loading conditions. Therefore, to minimise the drag and enable maximum acceleration at high rotor rpm, move the stick forwards to approximately the mid position as the aircraft starts to move. Monitor rotor rpm carefully ensuring that it is increasing, if the stick is too far forwards the rotor rpm will decay, and a serious accident can be caused!
When the nose comes up allow nose wheel to float at about 10 – 15 cm above the runway by a balanced change of control stick position
Minimize lateral drift by applying appropriate lateral control stick input into cross wind direction Maintain directional control i.e. runway alignment with sensitive pedal input
Maintain attitude until speed increases and gyroplane lifts off (at about 80kmh (50mph, 45KIAS), depending on loading and rotor)
Allow gyroplane to build-up speed in ground effect
4.10 Climb
Perform initial climb at safe climb speed and adjust trim
Set power to maximum take-off power. CAUTION Full take off power will require right rudder input to counteract the high thrust and torque load.
Check engine instruments and respect maximum take-off power time limit
Switch off second fuel pump at safe height
At safe altitude, the climb may be continued with VY and reduced power setting for noise abatement When desired altitude is approached, level gyroplane and reduce power