Air Creation iFun XL Manual de operaciones para pilotos - Página 13

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5.3.3

Flight Techniques

Taxiing:

Avoid turning sharply as this generates large amounts of torque and hence wear,

transmitted to the pylon, hang point and keel. Always try to keep the wing aligned with

the trike when turning by bracing the control bar. Turning circle is very small, but

beware – wing tips and tip fins stick out and can move around their arc very fast!

Take-off and landing techniques:

Take-off is conventional. Keep the aircraft straight using the nose wheel steering. Allow

the bar to float in the neutral position in pitch and keep the wings level. Let the control

bar move forwards to obtain takeoff rotation. As the aircraft rotates, allow the control bar

to move back smoothly and allow airspeed to build.

If taking off in calm conditions or from a soft field or from a field with long grass, the

minimum take-off roll distance is reached by increasing rpm to full power with brake,

then releasing the brake and pushing the control bar fully forward. The control bar should

be brought backwards immediately once the wheels are in the air to obtain a climbing

speed of 65 km/h (40 mph) according to the load. If a performance take-off is not

required then once the aircraft has rotated allow the bar to move back smoothly, adopt a

shallow climb attitude and allow the airspeed to build to a safer low-level climbing speed

of around 70 km/h (44 mph).

The landing is conventional. Maintain the approach speed until 8-10 foot height, then

flare out to make a smooth touchdown. Braking may be used once all wheels are on the

ground. A short landing requires a slow approach speed of 70 km/h (44 mph). Raise the

nose a few meters from the ground, in order to touch down at stalling speed. Brake and

pull the control bar to the maximum in order to obtain more aerodynamic braking once

the rear wheels have touched ground. If conditions are gusty or a strong wind gradient is

suspected, use a higher approach speed value.

Turning:

The iFun wing is very well-balanced in the turn and is capable of high rates of roll with

modest control forces. Roll rate is proportional to both airspeed and wing loading. Fastest

roll rates will be achieved at light weights and high airspeed. Conversely when flying at

high weight and low speed, maneuverability is reduced. Ensure that the runway is long

enough for take-off and that no sudden maneuvering is required to avoid obstacles early

in the climb, when speed may be low.

Turns at bank angles up to 60 degrees are permitted. To balance the turn at this bank

angle, forward bar movement is necessary to generate the required lift for level flight and

increased power is required to overcome drag and maintain airspeed. Under these

conditions substantial wake turbulence is produced. For turns of over 45 degrees of bank

it is recommended that a heading change of no greater than 270 degrees is used, in order

to avoid entry into the wake turbulence and a possible excursion outside the permitted

flight envelope. The iFun has neutral spiral stability at high cruise speed and thus will

remain balanced in a turn without any roll control pressure required. With a high loading

GDMUiFXL-evo-1G

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