I am having a devil of a time trying to figure out why the sailors want flaps?
flaps can cover an entire trailing edge, ailerons are unlikely too, and operate opposite to each other. But it could just be that these are servo devices, and that operating the flap simply pulls the wing around as its on a free bearing. Which makes it a servo device for changing wing angle of attack (AoA).
Go back to what I was saying about the lift centroid.
Normally a wing will have more suction strength vectoring up and slightly forward on a wing, activate a flap and that swishes away to the aft end and pointing aft. That vector change is a result of more drag pulling the lift vector back, and the relocation of the lift vector along the chord is the powerful effect the flap is having
Of course this isnt common, and aircrafft design is such that designers take few risks. But occasionally we see them as trim devices like this rudder trim inset into the rudder. The stick forces are lighter, but deploying some trim operates the whole rudder (as like our bearing its hinged). Actually there proper name is a servo rudder, but model aircraft popularity of the name is precluding the adequacy of its use.
Named a tab here, but you can see the actuator from the bellcrank, so a tab it is not
wiki are such twats
https://upload.wikimedia.org/wikipedia/en/e/e9/Light_aircraft_rudder_and_trim_tab.JPG
.
Posted by: robriley@rocketmail.com
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a new topic | • | Messages in this topic (19) |