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M38A1"D" Production Units

38a1d_13.jpg (144434 bytes)
This 1955  "D" model with date of delivery of April 1955 is owned by Bill Harris

Battle Group Atomic Delivery System:  M28 Mounted on Truck, Utility M38A1D

This M38A1 "D" model shows a manufacture date of April 1955 with a serial number of 83752.  The original hood number is 2A 5770 and both serial numbers are present.  Only 50 +/- of the "D" models were produced and converted.  Much like the M170, an extra spring leaf was added and the spring hanger has the reinforcing strap.  The original Detroit Arsenal Data tag (XM28) remains present on the jeep.  TM9-1000-209-12 also shows the proper placement of where the tag resides on the gun carriage.  The glove box is stenciled Autobahn 40, Cities 25, Others 35.  Under the metal covers which take up the rear seat area are two of the atomic projectiles (dummies of course).  

For a time in the early portions of the Cold War, military planners anticipated that atomic weapons might be used in large scale conflicts of the future.  Both the Soviet Union and Unites States worked on tactical use of atomic weapons, made possible by the miniaturization of nuclear components.  In 1950, a 280MM atomic cannon was developed in the United States, as were later close support weapons such as the Honest John and the Davey Crocket.

Named for the famous Tennessee frontiersman, US Congressman and martyr of the Alamo, the Davey Crocket consists of a 279MM atomic projectile fired from a 120MM recoilless gun.  A fixed round charge of propellant and a separate piston could launch the approximately 1 Kiloton-Yield projectile to a range of 2000 meters or just over 1.25 miles.

By the late 1960's, the limitations of the Davy Crocket were recognized and it was withdrawn from the military arsenal. 

This vehicle was acquired in 2000 and subsequently endured a frame-off restoration to bring it back to it's glory as one of only a few production units.  Congratulations Bill!

120MM Davey Crocket Weapons System M28, including M29 20mm spotting rifle

2 ea projectile, 279-MM, Atomic, XM388
2 ea piston, 120-MM, Launching, M5
2 ea charge, 120-MM, Propelling, M92E2
20 ea cartridge, 20-MM, Spotting, M101

Mount, telescope, M117
Telescope, elbow, M107

Gun elevation, 10-25 degrees
Minimum right, 30 degrees
Maximum right, 44 degrees
Gun elevation, 10-25 degrees
Minimum left, 90 degrees
Maximum left, 180 degrees

Two (2)

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38a1d_05.jpg (82987 bytes) Battery Box - Cam strap type.  Note the two additional footman loops.  
38a1d_22.jpg (64091 bytes) There are two corresponding footman loops on the drivers side as well.  They were for stowage straps for holding a long canvas bag that held cleaning staff sections for cleaning the 120 MM Gun.  As time permits, I will make a replica bag and place it on the hood where it belongs.
38a1d_17.jpg (134636 bytes) Radiator - including support rods
38a1d_21.jpg (78132 bytes) Front Fender Seam - 
38a1d_04.jpg (114088 bytes) Front Bumper and Grill - 
38a1d_01.jpg (103638 bytes) Glove box showing posted speeds (original)
38a1d_02.jpg (121432 bytes) Two M5 Launching Pistons
38a1d_03.jpg (110033 bytes) Two M92E2 Propelling Pistons
38a1d_06.jpg (126048 bytes) Spare Tire Postion
38a1d_07.jpg (110551 bytes) Clamp to hold gun in traveling position
38a1d_08.jpg (110350 bytes) Original data tag #38, Detroit Arsenal
38a1d_09.jpg (137946 bytes) 120MM gun in traveling position.  From the TM, it has also been learned a larger version of the gun (155 MM w/ a 37 MM sighting gun) will also fit on the M38A1D.   The Gunner's Quadrant is original and was a donation from a fellow member.
38a1d_10.jpg (107573 bytes) Storage container for two atomic projectiles
38a1d_11.jpg (104735 bytes) Two XM388 projectiles
38a1d_12.jpg (136684 bytes) 120MM gun in traverse position
38a1d_14.jpg (135688 bytes) 120MM gun in traverse position
38a1d_15.jpg (146949 bytes) 120MM gun in traverse position
38a1d_16.jpg (88033 bytes) Breech of 20MM spotting rifle
38a1d_20.jpg (121913 bytes) Tri-pod for sighting telescope
38a1d_23.jpg (125306 bytes) Rear spring reinforcement strap
m38a1df.jpg (68232 bytes) Atomic Projectile launch mechanism as found in a museum.
m29aa.JPG (96002 bytes) From the Tech Manual, the BIG NUKE.  M29!
m29ab.JPG (101840 bytes)
m29ac.JPG (111584 bytes)

Bill Harris
for providing pictures of his "D" model.

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