What is the gun traverse limit of the 75mm armament on M3 Lee/Grant?

http://www.onwar.com/weapons/tanks/firearms/fm3a4med.html and http://afvdb.50megs.com/usa/m3lee.html say 15 degree L/R.

Does anyone know of any direct and reliable source such as from US army archive records?


According to FM23-95 Basic Field Manual, 75mm Tank Gun M2 (Mounted in Medium Tank M3), the amount of traverse to the left and the right, are actually 14° 0'. Turns of hand wheel to traverse through maximum travel (28°) is 25½. One turn of the hand wheel was 1° 6'.

Note that the link above is to a PDF which may download to your computer, but opens in Firefox directly in my own.

  • Did you check out John's link? That manual says 15 degree. Which reference should we trust?
    – Argyll
    Feb 24 '17 at 5:31
  • I have no idea. I'm not a tanker, I was an electronics specialist. My gut feeling, and that is all it is, is that the 15deg number comes from what the turret/sponson that the 75 mm was mounted in/on/through could handle, but that the gun itself could only go 14. There is an M3 near me, but it's a locked up display piece.
    – CGCampbell
    Feb 24 '17 at 12:34

The operator's manual for the tank is available from archive.org. The OCR quality is not superb, but sufficient to confirm the 15 degree left and right traverse.

See page 41.


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