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Forum: Aerodynamics

08-19-2008, 11:55 AM

Replies: 22

Incidence on a PT 22

Views: 3,897

Posted By hogboy52

RE: Incidence on a PT 22

All wings have downwash, which is what makes the plane go up. The negative stab would offset the forward cg which together would make the plane more stable in pitch recovery. It might also compensate...

Forum: Aerodynamics

06-04-2008, 10:20 AM

Replies: 65

Propeller acts as brake?

Views: 11,194

Posted By hogboy52

RE: Propeller acts as brake?

I would say that the prop on an idling engine is exactly the same as frictionless. In any case it's been established: low pitch prop- more drag spinning; high pitch prop- more drag stationary (and...

Forum: Aerodynamics

04-23-2008, 09:42 AM

Replies: 46

Good Reading?

Views: 10,936

Posted By hogboy52

RE: Good Reading?

I have a copy of Charles Grant's "Model Airplane Design, Theory of Flight" c.1942, which covers all that's involved in free-flight from the classical era- a major analysis of the principles of...

Forum: Aerodynamics

04-19-2008, 11:57 AM

Replies: 10

Wing incidence degrees for a low wing monoplane?

Views: 1,574

Posted By hogboy52

RE: Wing incidence degrees for a low wing monoplane?

The original Stahl plan has an airfoil 14% thick (Clark YM?) set at +3deg. per stab. at 0. This airfoil is 50% thicker than the normal Clark Y which would sit at 2deg. in the same position. Either is...

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