johnpipe
New Member
Destination Tokyo (1944, Cary Grant, John Garfield) is probably my all-time favorite WWII submarine motion picture. It was the first to have sets with a realistic feeling about them. However, the Pacific "Fleet" submarine was secret, and though the general level of accuracy was high, a little artistic-license was thrown in.
One such bit of license was the "Ma Deuce," the M2 .50 caliber Browning Automatic Machine Gun seen aboard the sub in the battle-action surface sequence. First, a real M2 Aircraft Model, as the D.T. BAM gun turned out to be, fires at 750 to 850 rpm, and at this high rate must fire from a locked and closed bolt, and cannot be actuated by blank-fire. As a result, the M2's seen are amongst what are probably the first of the sim-fire guns, in which a gas-mix such as propane or acetelyne and oxygen are set off to simulate gun-fire.
Here's a look at the D.T. "Ma Deuce":
The rig is actually a B-17E/F side gun, with Boeing side-gun ammo box, and seems to have been inherited from Warner's previous film Air Force (1943, also with John Garfield as a gunner!). Also, the riveted top-plate is some 50% longer than normal, probably to meet BATF regulations!
I had decided to make a scale-model of this; the scale was determined by what was available in my scrap-box to make the barrel jacket, namely 7/8" aluminum tube, and as the real thing has a 1-7/8" diameter jacket, the resulting scale was about 47%. After much research, and a few re-builds to correct errors as I obtained more info, this was the eventual result:

The materials used were 1/4" MDF for sides, 3/4" ex dresser-drawer separators for spacers, ply for the top cover, and old brown clip-board for the bottom, rear and top plates, and the recoil-shield on the E-8 flexible adapter (the cradle-mount). The adapter side-bars are oak-veneered poplar from furniture scrap.
Here's some construction views:

The round, large object from which the barrel-jacket protrudes is called an "E-10 Ring-Spring adapter" and would handle the recoil on the real thing; I made it from a PVC pipe-coupling, over which are two telescoping PVC pipes. The bosses are turned on the wood-lathe from maple, and tapped 1/4-20 and adhered with epoxy; the notched-ring was carved from maple.
I only identified the ammo-box after building same from the movie, and it took me a while after that to obtain the actual plans (available from Smithsonian National Air & Space Museum Archives). The box is a little off, but not by much. It's MDF & .010 brass, with 16ga linoleum nails as "rivets." "Cartridges" are made, some from .223 Remington brass found in a dipsy-dumpster and some from hobby brass tube; "bullets" are turned from hardwood, and "links" are from sheet brass stock.
Hope you like it.
Regards, John
One such bit of license was the "Ma Deuce," the M2 .50 caliber Browning Automatic Machine Gun seen aboard the sub in the battle-action surface sequence. First, a real M2 Aircraft Model, as the D.T. BAM gun turned out to be, fires at 750 to 850 rpm, and at this high rate must fire from a locked and closed bolt, and cannot be actuated by blank-fire. As a result, the M2's seen are amongst what are probably the first of the sim-fire guns, in which a gas-mix such as propane or acetelyne and oxygen are set off to simulate gun-fire.
Here's a look at the D.T. "Ma Deuce":

The rig is actually a B-17E/F side gun, with Boeing side-gun ammo box, and seems to have been inherited from Warner's previous film Air Force (1943, also with John Garfield as a gunner!). Also, the riveted top-plate is some 50% longer than normal, probably to meet BATF regulations!
I had decided to make a scale-model of this; the scale was determined by what was available in my scrap-box to make the barrel jacket, namely 7/8" aluminum tube, and as the real thing has a 1-7/8" diameter jacket, the resulting scale was about 47%. After much research, and a few re-builds to correct errors as I obtained more info, this was the eventual result:
The materials used were 1/4" MDF for sides, 3/4" ex dresser-drawer separators for spacers, ply for the top cover, and old brown clip-board for the bottom, rear and top plates, and the recoil-shield on the E-8 flexible adapter (the cradle-mount). The adapter side-bars are oak-veneered poplar from furniture scrap.
Here's some construction views:










The round, large object from which the barrel-jacket protrudes is called an "E-10 Ring-Spring adapter" and would handle the recoil on the real thing; I made it from a PVC pipe-coupling, over which are two telescoping PVC pipes. The bosses are turned on the wood-lathe from maple, and tapped 1/4-20 and adhered with epoxy; the notched-ring was carved from maple.
I only identified the ammo-box after building same from the movie, and it took me a while after that to obtain the actual plans (available from Smithsonian National Air & Space Museum Archives). The box is a little off, but not by much. It's MDF & .010 brass, with 16ga linoleum nails as "rivets." "Cartridges" are made, some from .223 Remington brass found in a dipsy-dumpster and some from hobby brass tube; "bullets" are turned from hardwood, and "links" are from sheet brass stock.
Hope you like it.
Regards, John