Author Topic: The WW2 plane elevator angle vs velocity at level flight data?  (Read 490 times)

Offline Ex-jazz

  • Nickel Member
  • ***
  • Posts: 482
The WW2 plane elevator angle vs velocity at level flight data?
« on: January 10, 2010, 02:51:42 PM »
Hi

I got from my wife a nice Xmas gift. A book about the airplane aerodynamics and flight mechanics. Very nice book.

It had a very interesting chart in flight mechanics section, which is presenting the required elevator angel in different velocities for the level flight.

My remade the chart on below:

The elevator angle is on vertical axes and the velocity is on horizontal axes. The green line marking the stall velocity.

My questions:
Are there available a similar chart from any WW2 fighters? With weight & AOA data included?

Thanks

Offline Stoney

  • Gold Member
  • *****
  • Posts: 3482
Re: The WW2 plane elevator angle vs velocity at level flight data?
« Reply #1 on: January 13, 2010, 03:34:18 PM »
I don't have access to the book right now--its in a box, but, its basically a trim analysis if I'm reading the graph correctly.  I've got some methodology on how to do it, all the formulas, etc. as it relates to the pitching moments of the wing.  I guess if we can get the proper data from some WWII aircraft, we could plug it in.  

The shift from a negative deflection to a positive deflection as speed increases shows the change in pitching moment of the wing over that speed range.  Is this from an actual aircraft or merely an example curve for illustration purposes?
"Can we be incorrect at times, absolutely, but I do believe 15 years of experience does deserve a little more credence and respect than you have given from your very first post."

HiTech

Offline Ex-jazz

  • Nickel Member
  • ***
  • Posts: 482
Re: The WW2 plane elevator angle vs velocity at level flight data?
« Reply #2 on: January 14, 2010, 12:41:05 PM »

The chart is from the "Airplane's aerodynamics and flight mechanics" book.



The chart text is just saying '...from certain small airplane'.



If I understand this correctly, this chart is summing up the airplane static longitudinal stability quality to one curve.
Ok, the airfoil, weight load and AOA data's would help a lot to understand the plane limits.

This is meaning to me a completely new possibilities to code a flight model/engine.