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Forum: Tech Log

4th Feb 2018, 21:00

Replies: 30

FPV (Birdy)

Views: 4,907

Posted By Sidestick_n_Rudder

Try here: ...

Try here:
https://www.grc.nasa.gov/www/k-12/airplane/bernnew.html

Forum: Tech Log

4th Feb 2018, 20:31

Replies: 30

FPV (Birdy)

Views: 4,907

Posted By Sidestick_n_Rudder

There’s a lot more factors at play here - like...

There’s a lot more factors at play here - like local upwash/downwash, aerodynamic and geometric twist, wing sweep etc.

I’d argue that even on a plain, straight wing with constant angle of...

Forum: Tech Log

4th Feb 2018, 17:46

Replies: 30

FPV (Birdy)

Views: 4,907

Posted By Sidestick_n_Rudder

The fuselage is not entirely symmetrical, so...

The fuselage is not entirely symmetrical, so perhaps best L/D for fuselage is at ~2 deg?

BTW, thanks for the aerodynamic data for the 787. I would have actually expected it to operate at L/D...

Forum: Tech Log

4th Feb 2018, 16:49

Replies: 30

FPV (Birdy)

Views: 4,907

Posted By Sidestick_n_Rudder

Eckhard, As far as I know, in 3D...

Eckhard,

As far as I know, in 3D aerodynamics, ie. when we are discussing entire airplane , rather than an airfoil, the convention is to reference the AoA from the longitudinal axis of the plane...

Forum: Tech Log

4th Feb 2018, 10:56

Replies: 30

FPV (Birdy)

Views: 4,907

Posted By Sidestick_n_Rudder

It actually does not matter what the angle of...

It actually does not matter what the angle of incidence is - you can use the airplane longitudinal axis as a datum for the AoA and for all practical purposes, the difference between the pitch and FPV...

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