Seversky/Republic S-3 data?

[tomo pauk]

The data on the S-3 wing profile, as used eg. on P-47 or P-43 seems elusive. Though one web site states it have had a 11% thickness-to-chord ratio at 30% of span. Any data around?

 

[GrauGeist]

Tomo, have a look at this airfoil data:

REPUBLIC S-3 AIRFOIL (s3-il)

 

[tomo pauk]

Thanks, Dave - that is exactly the web page I was making a hint above. Unfortuantely, I'm unable to find the T-t-C ratio at root and at tip.

 

[Aeroweanie]

We are in the process of building a 3D CAD model of the P-47. I measured the spar depth at 20 spanwise locations, as well as the chord at each location. I get this t/c distribution:

 

[ThomasP]

There is a NACA report out there somewhere that tests the Republic S-3 as it was on the P-47B/C/D. In my notes I have the root (theoretical join with the fuselage (not the fuselage center-line) at 15%, 1/3 span from the wing root at 13%, 2/3 span from the wing root at 11%, and the tip at 9%. I am not sure if the 9% is at the theoretical tip (ie full span from the fuselage) or if it is the last airfoil former just before the wing tip end-piece.

 

[Jugman]

We are in the process of building a 3D CAD model of the P-47. I measured the spar depth at 20 spanwise locations, as well as the chord at each location. I get this t/c distribution:

For Spar #1?
Tomo maximum t/c is ~15.5% Root and ~8% tip. I had the exact values somewhere but I can find them. Per NACA-CB-L5E22 maximum thickness was an average of 12.6% from 96.7 to 128.5 from centerline.

 

[Aeroweanie]

I dug through the NACA reports I've found and added the data they list. I guess the spar measurements were a bit off.

 

[Jugman]

I dug through the NACA reports I've found and added the data they list. I guess the spar measurements were a bit off.

Not at all! Spar 1 is 23" in front of the wing datum line (~36% of MAC and 33.6% of root chord) and 14" from the leading edge at the root. Your measurements look good to me.

 

[Aeroweanie]

Not at all! Spar 1 is 23" in front of the wing datum line (~36% of MAC and 33.6% of root chord) and 14" from the leading edge at the root. Your measurements look good to me.

(Said while smacking my forehead): Duh! That totally makes sense!

 

[Jugman]

I don't know what your source material is, but Air Corps Library has a large number of P-47 engineering drawings. This includes the wing rib assembly drawings.

 

[Zmauky]

For whatever it's worth, the gentleman at the link

ƒŠƒpƒuƒŠƒbƒN P-47D ƒTƒ“ƒ_[ƒ{ƒ‹ƒg ƒŒƒCƒU[ƒoƒbƒN 1/72 ƒ^ƒ~ƒ„ Republic P-47D Thunderbolt Razorback Tamiya part 4

has made drawings that also have airfoils.
He is known for making the drawings himself, comparing the results with photos and factory data. Part of the pages has been translated into English and translate (mostly) works and the pictures are understandable anyway .