- Jun 29, 2009
The Ventra's had vibration problems, both with skin fracturing and with the engines (having your props vibrate is not a good thing for the engine in general and the reduction gears and nose casing are at hazard.)Use of 12 ft 2 in propellers from P-47 leaves 7/2= 3.5 in clearance vs. fuselage. To be extra safe, use a wider blade 12 ft dia unit (4.5in clearance)?
Yes you can extend the wings (one of the commercial conversations of Ventura's did this) but again, the cheap and cheerful conversion of the A-20 winds up taking more money and effort. Besides, you may want a bigger wing root area to fit more fuel to feed the R-2800s.
It took a while but they did get 725US gallons into the A-20, yes you are not carrying bombs but the engines are over 300lbs heavier each (2 speed single stage) and with everything else
you just sucked up 1/2 the bomb load. getting into that 530-725 gal fuel area is going into the higher gross weight limits.
Leave the A-20 alone, just actually deploy it quicker, (Beat somebody in England with a cricket bat to stop the turbinlight program after the first airplane)
Put the .303s in the nose, shoot the bomber with bullets instead of light. In service in the summer of 1941.
The US didn't get a P-70 into service until 1943. Units sent to NA swapped their P-70s for Beaufighters before going into action.
PS, note where the props are in relation to cockpit/pilot. Pilot comfort was not a high priority in WW II but they started to pay attention to it.
BTW, initial requirements for the P-61 called for an 8 hour patrol.