Mudge wrote:Rajay wrote:
Yeah, I noticed the extra dorsal turret, too. I was waiting for someone else to comment....
What's the problem...ya' can't have too many guns.
Mudge the armed
Apparently you can have too many guns. The problem is the weight of the guns and the amount of ammunition (and its weight) that you have to carry:
Excerpts from pp 46 – 50 of Roger A. Freeman’s
The Mighty Eighth: A History of the U. S. 8th Army Air Force
“The third squadron
(of the 92nd BG) at Alconbury, the 327th, was equipped with twelve YB-40s, a secret, experimental version of the Fortress, intended for a formation defense role.
Vega Aircraft Corporation did the initial work and in August 1942 converted a B-17F into the XB-40. After satisfactory preliminary tests, thirteen experimental models were ordered between November
(1942) and March
(1943). These Vega-built B-17Fs were turned into YB-40s at the Douglas modification center at Tulsa, by installing power turrets, one amidships over the radio room and the other, a neat, remotely controlled installation, under the nose, and
(double) gun positions in waist windows. These gave the aircraft a total of fourteen .50 machine guns against the nine for the standard B-17F.
On the YB-40, a prodigious amount of ammunition (some 12,400 rounds) was allowed for and much armor plate added at crew stations.
May 29th
(1943) was also the occasion of the YB-40s debut when seven were sent out with leading elements of the St. Nazaire force. Their performance was not a success. Shortcomings had been evident soon after their arrival at Alconbury; before they could be flown in combat it was necessary to install ammunition feed chutes to eliminate the manhandling of ammunition to some positions. But the most troublesome aspect of the YB-40 was its flying characteristics, particularly its tendency to fly tail heavy due to the added weight in the rear section. On this first mission, they flew in leading positions, but after the B-17s had bombed, the YB-40s, still laden with ammunition, could not keep pace, thereby forcing the whole formation to reduce speed.”