Flap Retraction and Zero Flap Speed
Hi,
On approach how is zero flap speed derived? I am looking for the regulation and the aerodynamic theory please.
On departure how is the flap retraction speed derived? Again I am looking for the regulation and the aerodynamic theory please.
I do not care about noise abatement.
I have seen V2 plus a value (10, 15 and 20 knots)for flap retraction speed and V2 plus a percentage that varies with aircraft weight or does not vary with anything.
On departure how is zero flap speed derived?
If someone can point me to a manual that gives answers that would be great.
FAR 25.143 is free of stall at 40 degrees of bank and may enter into some of the calculations. The airplane is a four engine airplane so the 1.7% of FAR 25.121 would have to be respected.
Are there actual graphs and/or tables in other four engine airplanes?
I fly an older airplane. A Lockheed Electra and there are no performance data for any of this in limitations or the performance sections. Is flap retraction minimum 1.25 of the stall speed?
Thank-you for any help with these questions.