±Recent Visitors

Recent Visitors to Com-Central!

±User Info-big


Welcome Anonymous

Nickname
Password

Membership:
Latest: JerryH
New Today: 0
New Yesterday: 0
Overall: 6595

People Online:
Members: 0
Visitors: 104
Total: 104
Who Is Where:
 Visitors:
01: Community Forums
02: Community Forums
03: Community Forums
04: Community Forums
05: Community Forums
06: Community Forums
07: Community Forums
08: Community Forums
09: Community Forums
10: Community Forums
11: Statistics
12: Photo Gallery
13: Community Forums
14: News
15: Community Forums
16: Photo Gallery
17: Community Forums
18: Search and Rescue
19: Community Forums
20: Community Forums
21: Community Forums
22: Community Forums
23: Community Forums
24: Community Forums
25: Home
26: Community Forums
27: Community Forums
28: Community Forums
29: Community Forums
30: Community Forums
31: Community Forums
32: Community Forums
33: Community Forums
34: Community Forums
35: Community Forums
36: Community Forums
37: Home
38: Community Forums
39: Community Forums
40: Community Forums
41: Community Forums
42: Community Forums
43: Home
44: Community Forums
45: Photo Gallery
46: Community Forums
47: Member Screenshots
48: Community Forums
49: Photo Gallery
50: Photo Gallery
51: Community Forums
52: Community Forums
53: Photo Gallery
54: Community Forums
55: Community Forums
56: Community Forums
57: Community Forums
58: Community Forums
59: Community Forums
60: Community Forums
61: Community Forums
62: Community Forums
63: Photo Gallery
64: Photo Gallery
65: Community Forums
66: Community Forums
67: Community Forums
68: Community Forums
69: Community Forums
70: Community Forums
71: Photo Gallery
72: Community Forums
73: Community Forums
74: Community Forums
75: Community Forums
76: Community Forums
77: Community Forums
78: Community Forums
79: Community Forums
80: Community Forums
81: Community Forums
82: Community Forums
83: Community Forums
84: Community Forums
85: Community Forums
86: Community Forums
87: Your Account
88: Community Forums
89: Community Forums
90: Home
91: Community Forums
92: Community Forums
93: Community Forums
94: Community Forums
95: Photo Gallery
96: Community Forums
97: Community Forums
98: Photo Gallery
99: Community Forums
100: Community Forums
101: Community Forums
102: Photo Gallery
103: Community Forums
104: News

Staff Online:

No staff members are online!
GMC M3 vs. M3A1
The AFV ASSOCIATION was formed in 1964 to support the thoughts and research of all those interested in Armored Fighting Vehicles and related topics, such as AFV drawings. The emphasis has always been on sharing information and communicating with other members of similar interests; e.g. German armor, Japanese AFVs, or whatever.
Post new topic    Reply to topic    Printer Friendly Page     Forum Index ›  AFV News Discussion Board

View previous topic :: View next topic  
Author Message
Chris_C
Power User

Offline Offline
Joined: Jan 28, 2006
Posts: 207
Location: WV, USA
PostPosted: Sun Jul 22, 2007 5:33 pm
Post subject: GMC M3 vs. M3A1

Does anyone have any idea how to tell the difference between the gun mount M3 of the 75 mm GMC M3 and the gun mount M5 on the 75 mm GMC M3A1? Since this is the only differentiation point between the vehicles, it's an important factor. The 75 mm GMC in the LST building at Ft. Knox appears to have a mount similar to the M5 mount on page 104 of Hunnicutt's Half-track. However, no clear pictures of the mount M3 are in the book, only the nonstandardized mount in the GMC T12 on page 98. Obvious differences include the M5 mount being bolted instead of welded, but the top-down picture labeled as a GMC M3 (and therefore having the mount M3) on page 103 also appears to be bolted down (this is more easily visible on the left side). I've attached a picture of the mount in the LST building's GMC. Is it definitely an M3? Thanks. Smile
Back to top
View user's profile Send e-mail Visit poster's website
Dontos
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 3436
Location: Vine Grove, KY
PostPosted: Sun Jul 22, 2007 7:19 pm
Post subject: Re: GMC M3 vs. M3A1

No Clue, but does this help....?



Cool
Don

_________________
"Gonna hold my breath until Armor returns home..."
Back to top
View user's profile Send e-mail Visit poster's website AIM Address Yahoo Messenger Photo Gallery
Jens_O_Mehner
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 511
Location: Giessen, Germany
PostPosted: Mon Jul 23, 2007 12:20 am
Post subject: Re: GMC M3 vs. M3A1

Chris,

check the electronic archives at CMH for TM 9-306, 75-MM gun M1897A4 mounted in vehicles, dated 10 June 1943, which deals specifically with both mounts and can be downloaded as a .pdf-file.

There are a number of differences, including the number of handwheels used to elevate the gun (2 vs 1).

Cheers,

Jens O.
Back to top
View user's profile
JimWeb
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 1434
Location: The back of beyond
PostPosted: Mon Jul 23, 2007 2:37 am
Post subject: Re: GMC M3 vs. M3A1

On the M3 (modified M2A2) there are traversing & elevating handwheels on the left side of the mount and elevating handwheel on the right side.

On the M5 (modified M2A3) there is a traversing handwheel on the left and an elevating handwheel on the right.

So both images above show the M3 mount.

Cool

_________________
TTFN
Jim

If your not a member of JED then your
not serious about anything military..

***********************
www.jedsite.info
JED Military Equipment
***********************
Back to top
View user's profile Visit poster's website ICQ Number
Chris_C
Power User

Offline Offline
Joined: Jan 28, 2006
Posts: 207
Location: WV, USA
PostPosted: Mon Jul 23, 2007 8:47 am
Post subject: Re: GMC M3 vs. M3A1

Thanks, guys, and I will look for that TM pdf. I wonder if the picture of the M5 mount in Hunnicutt's books is mislabeled, as it has a handwheel layout exactly like the mounts above.
Back to top
View user's profile Send e-mail Visit poster's website
Jens_O_Mehner
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 511
Location: Giessen, Germany
PostPosted: Mon Jul 23, 2007 9:33 am
Post subject: Re: GMC M3 vs. M3A1

Chris,

it's only about 8 MB, so if you can't find it at MHI or AHCO or whatever they're calling themselves today, give me a holler and I'll email it to you.

To use the search function, click the righthand button "Military Publications", then "search", then enter the TM number (including the TM bit) in the "DDS Search Panel", and as historical time period, choose "Second World War II". If you're so inclined, search to your heart's content, all the manuals for the halftracks are there as well, as well as some FMs etc.- not everything is online yet, but a lot of interesting things, including the TM for the M6 tanks and various recognition manuals and Army publications, FMs, you name it. Cool

Most recent tank seems to be the M47, so no dice for you M48 lovers out there. Mr. Green

Cheers,

Jens O.


Last edited by Jens_O_Mehner on Mon Jul 23, 2007 9:53 am; edited 1 time in total
Back to top
View user's profile
Chris_C
Power User

Offline Offline
Joined: Jan 28, 2006
Posts: 207
Location: WV, USA
PostPosted: Mon Jul 23, 2007 9:50 am
Post subject: Re: GMC M3 vs. M3A1

Jens, thanks. I did raid the MHI site a while ago, but somehow missed the M1897 TM. Got it now, though!
Back to top
View user's profile Send e-mail Visit poster's website
Display posts from previous:   
Post new topic    Reply to topic    Printer Friendly Page    Forum Index ›  AFV News Discussion Board
Page 1 of 1
All times are GMT - 6 Hours



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum