The Ilya Murometz Type A after the removal of the centered wings.
Type A: 1 built, trainer, unarmed
First flight on 10th December 1913 was unsuccesfull, because additional wings placed between main wings chamber and tail caused dangerous move of center of stability to aft. After climbing to about 50 meters, plane raised nose, lost speed, slipped to left and felt on the ground. Fortunately pilot was not wounded.
During rebuilding the additional wing was removed. After five days Murometz took off for next flight.
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