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Old 11-03-2003 | 02:44 AM
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rik756
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From: Horn Lake, MS
Default Some Definitions Please...

I have a general idea on some of these, I think I know a few of them and I know I should know more of them. However there are a few terms that I would like some definition on so tha I can feel like I at least have little better understanding of what some posts are talkingabout. Some of you may recognize a scrap of your own sentence here and there too. Some of the ones I think I have an idea about I just left as a word. I bolded a few in the sentence they were used in to give a little perspective.

Guess this is the part where I have to lay claim to the phrase that, "The only dumb question is the one that isn't asked".So I'll ask


a good way to compare the characteristics of two aircraft is by their wing loading ("cubic wing loading" may be better, but that's a different story).

figuring "wing area "-- then how do we figure span loading??

Powerloading , wing aspect ratio and wing loading probably get my vote as the three most influential points in developing almost any powered model.

For a fully symmetrical airfoil wing with the CG location aft of the 25% chord of the MAC the tail lift is UP.
chord thickness

(reflex camber in the wing is another way, but that is often less efficient).
Camber
Tail Camber

Not using the fuselage aft or forward of the wing is desirable since the CLalpha curves of the fuselage are not those of the wing

variable sweep wing

Usually the lowest sweep angle is used as it is most likely to be theoretically correct and the glove or leading edge strake is not considered.

There is another good reason for not adding the area of the horizontal tail to the aircraft reference area

Both tails would need to generate roughly the same down force to balance the wing's pitching moment.

Dihedral vs anhedral

Incidence (pos and neg)

wing washout vs wash in

slipstream off the prop

The aerodynamic term involved is Clbeta - rolling moment due to sideslip

Winglets


vortex

Also, what are the little fin looking things some people have on the tips of the wing and what do they do?