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#10
January 31st 04, 07:16 PM
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"Stephen Harding" wrote in message ... Saw a photo yesterday of a WWII B-17 test aircraft powered with four Allison inline engines as opposed to the usual Wright Cyclones. That would be the XB-38, the ninth production B-17E (41-2401) modified by Vega with Allison V-1710-89 engines. According to "US Bombers" by Lloyd Jones, the changes showed an increase in top speed of 10 mph over the B-17E, with new increased wing fuel tanks giving a range of 3600 miles. The aircraft was lost on 16 June 1943, 29 days after it's first flight, due to an in-flight fire. Anyone know why the modification didn't go anywhere? The usual suspects? Too much disruption to B-17 production? Engines needed by P-38, P-39, P-40? The latter reason is the one given in the book. Jon. 
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