| This manoeuvre is pretty unique in that it depends on the model aircraft being
deliberately stalled. For once, the model is leading in the manoeuvre - ie. you
wait for it to do something rather than the other way around.
First, gain plenty of height and head into wind. Cut the throttle completely and use up elevator to increase the angle of attack without allowing the model to climb. The model will slow down pretty quickly. You now have to wait until the model stalls. By this time, you will probably have full up elevator on, trying to maintain height and the model will be in a high nose up attitude. When the model stalls, the nose will drop. Now input full rudder and the model will promptly go into a spin. Do not use ailerons to 'trigger' the spin - a common fault with a lot of fliers doing this manoeuvre. Hold on full rudder and elevator as the spin progresses. The number of turns in the spin is up to you but remember that it takes a good amount of height to recover. To recover, centre rudder and elevator then use down elevator to push the nose down, open the throttle to gain airspeed then use up elevator to quarter loop to exit the manoeuvre.
It may be that your model, rather than spinning, will go into a long, lazy spiral dive. This usually indicates insufficient rudder and elevator control movements or that the centre of gravity is too far forward. Try increasing the control throws first and if that doesn't work, gradually move the centre of gravity rearwards -about 6mm. (1/4") at a time. On most models, rather than the nose dropping at the stall point in which both wings stall at the same time, one wing will drop. In this case, you yaw into the dropping wing - ie. if the right wing drops first, use full right rudder and vice versa. You should aim for a complete number of spins so that the model recovers pointing in the same direction that it entered the spin. Recovery from a spin is entirely dependent on the model type and may take anywhere from virtually instantaneous recovery to a further half turn in the spin. In a very few cases, a model will not recover simply by centring rudder and elevator. If yours won't, use opposite rudder to the spin direction and use full throttle. As soon as the spinning stops, get the nose down to regain airspeed and pull out. So far, all the manoeuvres carried out have made little or no use of rudder. Now's the time! |
|||
|
|