ORIGINAL: mikenlapaz
Can any one direct me to or furnish info on the relationship between plane size (chord) and when that chord starts interacting with the ground surface.
Is their a factor that can be used to calculate when GE comes into play? If there is a relationship is it the same for landing and takeoff?
It seems that with a greater distance between the two it would lessen the landing 'float' of some models if the landing gear were 'taller'.
Thanks for the assist.
mikenlapaz
Mikenlapaz,
When you did read my posts and understand, look to the distances between wing / ground and stab / ground of the Orion.
When these distances are the same and the airplane is right in balance (also downwash wing on the stab) it isn't important anymore on what level you experience the ground effect.
That is the reason I did tell, use a conventional
real taildragger because when you take a tricycle and make it a "taildragger" it does not work. Then the stab is too low and the wing is too high normally. Think also on wind gradient if the wind blows!
Also the position of the CG has to be on that location that, because of the forward point of liftforces of the A-symmetrical airfoiled wing with high AOA, the stab is "loaded" and the total plane is your speed brake during landing. Look to the position of the elevator nearly horizontal.
During start, the situation is the same, I can accelerate on the moment the wheels do not touch the ground anymore before climb even retract the gear first.
I can make a full speed fly by on very low altitude and one times hit the ground with the propeller, after that I did make a belly landing on a distance of about 80 m in the next field without damage!
This is because with the
real taildragger in high speed the wing gets the influence of the ground effect before the stab!!!!
Ground effect, try it yourself. I think the effect starts between a half and a quart span.
Picture to show the dimensions and fly by lower as on this picture!
Cees