Edmund H. North was a songwriter.
The Nudelman-Suranov NS-37 -LRB- Нудельман - Суранов НС-37 -RRB- was a 37 mm aircraft cannon , which replaced the unreliable Shpitalny Sh-37 gun .. Shpitalny Sh-37. Shpitalny Sh-37. Large caliber was planned to allow destruction of both ground targets -LRB- including armoured ones -RRB- and planes -LRB- ability to shoot down a bomber with a single hit -RRB- .. Developed by A. E. Nudelman and A. Suranov from OKB-16 Construction Bureau from 1941 , it was tested at the front in 1943 and subsequently ordered into production , which lasted until 1945 .. It was used on the LaGG-3 and Yak-9T fighter planes -LRB- mounted between the vee of the engine , in motornaya pushka mounts -RRB- and Il-2 ground attack planes -LRB- in underwing pods -RRB- .. Il-2. Ilyushin Il-2. LaGG-3. LaGG-3. Yak-9T. Yakovlev Yak-9. Although the heavy round offered large firepower , the relatively low rate of fire and heavy recoil made hitting targets difficult .. While pilots were trained to fire short bursts , on light aircraft only the first shot was truly aimed .. Additionally , penetration of medium and heavy tanks ' top armour was possible only at high angles -LRB- above 40 degrees -RRB- , which was hard to achieve in battle conditions .. at high angles. plunging fire. For these reasons it was soon replaced in 1946 by the N-37 autocannon , which used a lighter 37x155 mm round .. N-37. Nudelman N-37