Instructor » Fixed Wing Patter » Ancillary Control Effects
Ancillary Control Effects
SPFTMCC - Student Pilots Fear The Mad C Cat.
(At the holding point)
Ok we are now going to look at the effect of slipstream on our controls.
If I increase the power therefore increasing slipstream we can see that the rudder and elevator become firm and more effective… our ailerons however will not be affected, at low power and therefore low slipstream all controls will be light with less effectiveness.
If we decrease power the aircraft’s nose will pitch down and yaw to the right.
If we increase power the aircraft’s nose will pitch up and yaw to the left.
However when we are normally flying we do not want the aircraft to pitch and yaw when we increase or decrease power.
Therefore we must compensate for this whenever we make power changes.
If we increase power we must ease forward on the control column, and squeeze in right rudder.
If we decrease power we must ease back on the control column and squeeze in left rudder.
If we lower flaps the nose will pitch up, if we raise the flaps the nose will pitch down.
Again we want to compensate for this so whenever we raise or lower flap we move our control column to maintain our attitude.
In this aircraft we have elevator trim which helps us to relieve control pressure.
To show this get student to hold a constant attitude that you set and then un trim the a/c and get them to re trim holding the constant attitude.
This is the mixture, if we wind it out, the fuel to the carburettor is reduced which decreases the fuel/air ratio, we use this to lean the aircraft when flying at altitudes above 3000ft.
(Show them fully leaned and what will happen if the aircraft is leaned any further ie. Rough running)
In training we always keep the mixture in the full rich position to aid in cooling.
C (Carb heat)
We use carb heat as both prevention and a cure for icing.
If we pull out carb heat, warm air is fed into the carburettor and there will be a slight drop in engine RPM.
CAT (Cabin Enviroments)
Show student cabin vents (cool, warm and hot air) and wing root vents.