Recent content by Aeroweanie

By "elevator" I mean the pitch axis control surface.

Pitch stability is dependent on the rate of change of pitching moment with lift, not the actual value of the pitching moment. The pitching moment requirement for an airfoil for a flying wing is that it be zero or slightly positive. It it isn't, negative elevator deflection is required to get...

Pitch stability is dependent on the rate of change of pitching moment with lift, not the actual value of the pitching moment. The pitching moment requirement for an airfoil for a flying wing is that it be zero or slightly positive. It it isn't, negative elevator deflection is required to get...

I figured it out from this drawing. The airfoil is a AVA 0 0 12.598-2 28/.55 thickness form added to camber from a NACA 1.1151R2 12.598. The main difference between the resulting airfoil and the NACA 1.1151R2 12.598 is that the trailing edge angle is reduced significantly.

Very overdue, but the answer is: this provides a means of creating NACA modified 4-digit airfoils using a method developed by the AVA in Germany. These airfoils are uniquely described by the six numbers of their designations: The first number indicates the maximum value of the mean-line...

Its a lot of typing, but these are the loft coordinates of the P-51D/K wing. Be careful, as the wing of the P-51B/C and P-51H are different. N13Y started life as a P-51D.

This website is worth knowing about, but they don't seem to have the Potez IX: RCL : 3views

These days, the distinctions have become blurred, as while I have paper drawings of aircraft like the Spitfire, they are reproductions. I prefer to have the drawings as pdfs, as they are a lot easier to store and I can then print them to whatever size I want. Good sources are Download Aircraft...

There is a chapter is this book that discusses the B-24 airfoil: What engineers know and how they know it : analytical studies from aeronautical history : Vincenti, Walter G. (Walter Guido), 1917-2019 : Free Download, Borrow, and Streaming : Internet Archive

Wow - thank you!!

Drat! I don't have the spitefireperformance part

Yes, if you include the CFD analyses I've done of WWII aircraft, I probably have more than 10 Tb

I think I got everything, but its 569 Mb.

Hank Borst was an important contributor in propeller development. He rose to be the chief aerodynamicist at the Curtiss-Wright propeller division and later was Director of Preliminary Design at Boeing Vertol. After leaving BV, he worked as a consultant. Among his clients was McCauley Propellers...