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Old 01-31-2004 | 03:29 PM
  #15  
FHHuber
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Default RE: canards v. forplane

ORIGINAL: probligo

[sm=spinnyeyes.gif]Errr FH, I said that????

You are absolutely right - that is why my ff canard has the foreplane at +7* and the wing a 0*

To the world at large - sorry. Take out the "not" and it makes sense.

I found... on models, especially smaller canards, that you want the Canard at +1 to +3 vs the mainplane when trimmed for level flight. This has the plane balanced a bit further back than the larger decalage. The foreplane then has a bit more authority to change pitch for maneuvering. The forplane actually has a chace to pitch the nose up enough to loop, rather than stalling out of every attempt.

If the foreplane is +7 to the mainplane... since the mainplane will tend to be at +3 AOA for level cruise. (most of the models I have done anyway) then the foreplane would be cruising at +10, which is already near stall in some cases. Put a bit of downward deflection on the canard control surface (up elevator function)... and it stalls the foreplane "right quick."