Well Rob, you basically nailed it-Congratulations! I have just a couple of slightly different answers. As both referred-to aircraft in the quiz have the identical wing airfoils-NACA 64A109 root and 64A109 tip (with the Learjets having a modified 64A109 wingtip only slight difference), I thought the correct answer might come from someone looking at all aircraft with the thin NACA 64A109 airfoils, working backwards from the Learjet clue. Here are my answers.
1a. Flug-und-Fahrzeugwerke A.G. (Aktiengesellschaft) (FFA). 1b. P-16
2. 28 April 1955.
3. Armstrong Siddeley Sapphire A.S.Sa.6 turbojet
4a. Thin. 4b. Fuel could NOT be carried in the thin wing of the P-16 so permanent tip tanks carried fuel. 4c. Bill Lear overcame this in the Lear 23 design first flying in 1963 with internal fuselage fuel and permanent tip tanks which became a signature symbol of all Lear jets. There were some early Lear 23 production wing variables: the twentieth and subsequent aircraft had a new wing with MILLED skins but still NACA 64A109 airfoils, tip section NACA 64A109 (mod). These Lear jet aircraft carried fuselage fuel and fuel in permanent wing tip tanks.
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The Swiss state manufacturer FFA designed the jet-powered P-16 to replace various piston-engine ground-attack aircraft in a 1952 government contract to meet rigid Swiss conditions of short alpine runways. First FFA prototype was P-16.04 flying on 28 April 1955. It later crashed into Lake Constance after failure of a small component. Four pre-series P-16s were ordered, and subsequently-100 production aircraft. The third prototype also crashed into Lake Constance. At that point, the production order was cancelled by the conservative Swiss government. FFA however, flew two P-16s under civil registration in 1959 and 1960, but that did not result in any orders, so the P-16 never entered military service. The fifth P-16 went to the Swiss Air Force Museum at Dubendorf.
The P-16 had strengthened retractable tri-gear with dual wheel main gear for rough field operations. It could operate from airstrips only 1,620 feet long. The wings were not swept and of high aspect ratio for both high subsonic cruise and low landing speeds. These qualities carried over to the Lear designs of small executive jets.
Specs and performance
Powerplant: one Armstrong Siddeley Sapphire A.S.Sa.6 Sapphire turbojet of 7,900 lb thrust
Crew: One
Wingspan: 36'7"
Length: 46'11"
Height: 13'11"
Weight: 25,838 lb
Max speed: 620 mph
Max altitude: 50,000'
