3.7 is better, i beleive the range is longer, and its continious fire. Where as the 2cm your vulneruable when it has to reload.
Ok this is for Der Teddy Bear:
The background on this, is U505 is in port for repairs after being bombed by Silcock's plane. (read here for details:
http://www.uboatwaffe.net/books/books.cgi?a=4 )
Page 132,
Quote:
By late may of 1943, the modifcations and Repairs on our boat were almost complete. Gone were the large gangs of shipyard workers in their thick brown wielder suits. Only a few technicians were to be still found aboard finishing small details.
U505 sported a totaly new sillhouette. We were espeicaly excited to stand on the spacious Wintergarden with its deadly looking Quad barrled flak gun. Combined with the two Twin-barreled 20mm guns on either side of the conning tower, our boat now boasted a total of eight guns for anti-aircraft defense. At least now, we thought, we would have a fighting chance against an any enemy bird trying to drop an egg on us.
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That was before u505's next patrol. Of which it had to return early because it was crippled by sabatoge. This is after the return of that patrol:
Page 145
Quote:
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For the next two weeks, our boat underwent repairs. They also replaced our huge four-barrled 20mm anti-aircraft gun with a newly designed single -barrled Oerlikon 37mm automatic canon. The trim little flak weapon worked flawlessly for us until the very end.
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