Recent content by blueskies

That flight article is an abridged version of this; The Single Sleeve as a Valve Mechanism for the Aircraft Engine

The Bearcats initial design was very similar to final, and apparently done before Grumman had the chance to look at a 190 up close. https://thanlont.blogspot.com/2011/02/conception-of-f8f-bearcat.html Furthermore just what did Grumman allegedly copy? The funny wing twist? Some of the...

I would guess that the mod was simply increasing the thickness, a somewhat common form of airfoil modification for that era.

NACA M-6 mod per The Incomplete Guide to Airfoil Usage

Was it really that thick at the root? Comparing this to the 23015 that is sometimes given for the zero provides a poor match; A 15014 gives the best 5-digit match I could manage; But a 2314 looks closer still. Maybe the sources that say 23015 mistook a 4-digit for a 5?

Not exactly related, but this website has details on a different Japanese laminar flow airfoil; Tatsuo Hasegawa, Ki-94

I am looking for German R-60 missile manual "Methodische Festlegungen für den GE der Rakete R-60"

This is from various weight surveys I've collected; Weights of wing group / wing area = weight per sqft P-51b= 1070 / 235 = 4.55 P-38= 1813.6 / 328 = 5.53 P-47D= 1459.6 / 300 = 4.87 P-39= 934.6 / 213 = 4.39 Hawk 75= 842 / 236 = 3.57 Spit MkII= 972 / 242 = 4.02 190A3= 1113 / 197 = 5.65 109f-2=...

This is a comparison of service quality wings done by the DVL. This represents service condition wings with a somewhat rough surface. Cwp = Cd, Ca = Cl, Cwp M is measured and Cwp id is theoretical ideal.

Which is why I said "If the Tempest had been called Typhoon II, which is what Hawker originally planned to do, would you be saying that the Typhoon was an airframe 'that could do more than one thing' unlike the Hurricane?" The same can be said of nearly every other mainline fighter of the war...

The Spitfire was a ship of theseus that had nearly every part altered by the time the war ended. The airframe shared some lofts with its progenitor but structurally it was mostly all new. Likewise the P-51H had zero parts similarity to the A, but unlike the Spit it had different lofts...

How far a design was pushed had more to do with what was decided/invested in it rather than some intrinsic aspect of the design. The spitfire at the end of the war is nearly an entirely new aircraft compared to the mkI/II at the start. New structural wing, heavily altered fuselage, completely...

Excess thrust is what determines the rate of climb, and generally the greatest excess thrust will be available near best L/D. If you cut the wingspan down then you are increasing the spanloading, which means the induced drag shoots up. Since best L/D occurs where parasitic=induced drag, then you...

main 700x175mm tail 350x135 For the A-5

The P-59 had about the same climb rate as the P-51D. If you cut down the wing then you'd have an aircraft with a RoC inferior to the piston aircraft already in service. The Germans and British both studied single engine jets for their first gen jet aircraft but decided on twins in large part...