• If You Are Having Trouble Logging In with Your Old Username and Password, Please use this Forgot Your Password link to get re-established.
  • Hey! Be sure to login or register!

US35b Full size print out

STA 44.100: .265 & 4.640
STA 31.500: .246 & 6.760

So it looks like it does not rise further past the STA 18.900 upper ordinate. (except for .001") That is good to know.

Andrew.
 
In your list, there is a missing station and ordinate at roughly about station 44.100. Do you have that station and ordinate?

Also at either station 31.5 or 31.3. The ordinate at that point is 6.760.

44.100 = 0.265 / 4.640
31.500 = 0.246 / 6.760
 
Well, I finally finished redrawing the US 35B mod based on dimensions from a legible copy of 13814 that was redrawn without change June 15, 1951, compared it to leading edge skin drawing 10630, and extracted the camber line and chord line for the 35Bmod. Noticed several interesting things.

The upper surface of 13814 is drafted wrong in front of Station 1.580. The drafting doesn't match the listed.dimensions and is too low.

The chord line is rotated 1.755 degrees more than the old NACA reference line. Therefore all the old NACA data referenced to the angle of attack needs to have 1.755 degrees subtracted from the angle of attack to match current reference conventions.

The leading edge radius is 1.498 inches (1.50 inches).

The Station labled 37.800 should perhaps be 37.880 to match other drawings and to better match the listed ordinate of 5.770 (it calculates as 5.782).

If I were to let all the listed Piper coordinates float by up to 0.0005 inch, I could slightly improve the fit, but I don't think it is worth the effort.
 
Last edited:
Great progress Jim!
I have been busy working on the fuselage 3d for the Wag Aero 2+2, as soon I am done with that (many little mods here and there to get it just right) I will redraw the airfoil. Do you have the updated station data to make sure I use those and get the airfoil redrawn.

All the best.
 
I do.

I'm cleaning up the Acad drawing this weekend and will email you a copy in a couple of days.
 
Hello Darrel,

The link to the airfoil data (after only 6 years ) is no longer working. Any leads on other good sources ?

thanks,

Jonny
 
Back
Top