ChezDaJez
Posts: 3436
Joined: 11/12/2004 From: Chehalis, WA Status: offline
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quote:
ORIGINAL: Commander Stormwolf A6M3 - tail hook removed to save weight, non-carrier capable, clipped wings to improve roll pilot complaints: not enough range, less maneuverable result: A6M3a - tail hook put back in, wing-tips put back in to reduce wing loading, more fuel capacity A6M3 is some type of easy-rolling, fast diving, shorter range, non-carrier version A6M3a is basically an A6M2 with a different engine The A6M3 was basically a re-engined Model 21 with a smaller fuselage fuel tank and the folding wingtips removed. The wingtips were originally retained on the A6M3 prototype but were deleted starting with the 5th production model at the request of operational units. The A6M3 upgraded to the NK1F Sakei 21 engine which produced about 180 hp more than the Sakei 12 and had a 2-speed supercharger vice the single speed unit on the -12. The Sakei 21 was a very reliable and forgiving engine but it had greater fuel consumption than did the Sakei 12 and the new engine required that the firewall be moved back 8 inches causing a reduction in the size of the fuselage fuel tank from 98 liters to 60 liters. On the plus side, the A6M3 sported 100-20mm rounds for its cannon vice the 60 rounds found on the A6M21. What you ended up with was an aircraft that had only a marginally better roll rate above 200kts, a slightly faster top speed, a marginally decreased rate of climb and a much reduced range. Dive speeds did not change as the problem was with the thickness of the duraluminum skin on the wings, not the wingtips themselves. A total of 343 Model 32s were produced beginning in the summer of 1941 but many were relegated to training duties in Japan after the Solomons campaign demonstrated its weaknesses especially in regards to range. The 904th A6M produced had a thicker wing skin and a redesigned wing structure which finally allowed the Zero to dive faster than 400mph. The wingspan fell between the original A6M21 and the shortened A6M32. This aircraft also incorporated new type exhaust stacks and had 2-45 liter wing tanks installed outboard of the wing cannon. This new Reisen became known as the Model 52 (A6M5). It could hold its own against the new Hellcat when piloted by an experienced pilot but its inability to absorb punishment ensured that there wouldn't be many experienced pilots left to fly it. Chez
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Ret Navy AWCS (1972-1998) VP-5, Jacksonville, Fl 1973-78 ASW Ops Center, Rota, Spain 1978-81 VP-40, Mt View, Ca 1981-87 Patrol Wing 10, Mt View, CA 1987-90 ASW Ops Center, Adak, Ak 1990-92 NRD Seattle 1992-96 VP-46, Whidbey Isl, Wa 1996-98
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