Bomb release identification

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Mark r

Recruit
1
0
Nov 8, 2020
Hi, thanks for the add, try to id this bomb release handle/ assembly, any help would be much appreciated, pics attached , thanks again
 

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Here is some documentation for the Handle, Bomb Release Mk 4 Mod 2, and the note describing the difference between the Mod 2 and 3 (yours).
I believe that this may have been used in dive bomber applications, such as the SBD, SB2C, (and their USAAF versions) and A-36. I tried to add the page from the SBD manual showing the lever location in the cockpit, but its pretty small. Try visiting the US Naval Aviation Museum website cockpit panorama page to see it. Here's a link: Virtual Tour - National Naval Aviation Museum


Bomb Release Mk 4.jpg

IMG_8791.jpg

1605209371555.png
 
I also think that if you spend some time perusing flight manuals of USAAF and USN dive bombers and fighters that had bombing capabilities, you'll spot that mounting apparatus and ID the specific aircraft type. I don't think this mount was used in either SBD or SB2C s. If you are interested in selling it, PM me.
 
I also think that if you spend some time perusing flight manuals of USAAF and USN dive bombers and fighters that had bombing capabilities, you'll spot that mounting apparatus and ID the specific aircraft type. I don't think this mount was used in either SBD or SB2C s. If you are interested in selling it, PM me.

And you can find many of them here: Manual Index - American
 
The part number and Inspection stamp you posted seem to indicate a Douglas built product. Douglas inspection stamps used that distinctive D shape with a number inside it tho usually a much longer D. The "hammer" inside is very confusing tho unless it is a stylized 7, which I very much doubt. I would expect it is a process stamp like the HT stamps.

If you look on other parts of the mounting pedestal and find part numbers and inspection stamps it should be possible to identify the manufacturer. If there are more of the Ds but with numbers in them then it is a Douglas built product. The part number on the large casting should be easy to read but it may have Alcoa stamps. Sheet parts are better for stamps. Remember lots of companies built parts for other companies so the inspection stamp only shows the manufacturer, not the designer.

1605242188663.png


Typical Douglas stamps look like these samples
1605241495964.png


If you find a stamp that looks like those below, or a variation of them, it indicates the part was inspected after being heat treated. Every manufacturer used similar stamps for this process. An AN stamp means it passed military inspection as well, tho those are much less common.
1605241788549.png

Douglas part numbers follow the same pattern as your number, 199125, but there is no instant recognition of the aircraft model as on Bell, Curtiss, Consolidated and NAA aircraft as the first digit of the part number indicates the drawing size. With Douglas the -1 on the end usually indicates there are both left and right handed versions of the individual part the number is stamped into and this is a right handed (if my rusty memory is correct) version of the part. With some other manufacturers the -1 indicates the first identified/detailed part of assembly 199125. EG Spitfire part numbers all start with the drawing number of the first model the part was used on followed by, in some cases, up to over 2000 dash numbers
 
Last edited:
The part number and Inspection stamp you posted seem to indicate a Douglas built product. Douglas inspection stamps used that distinctive D shape with a number inside it tho usually a much longer D. The "hammer" inside is very confusing tho unless it is a stylized 7, which I very much doubt. I would expect it is a process stamp like the HT stamps.

If you look on other parts of the mounting pedestal and find part numbers and inspection stamps it should be possible to identify the manufacturer. If there are more of the Ds but with numbers in them then it is a Douglas built product. The part number on the large casting should be easy to read but it may have Alcoa stamps. Sheet parts are better for stamps. Remember lots of companies built parts for other companies so the inspection stamp only shows the manufacturer, not the designer.

View attachment 601715

Typical Douglas stamps look like these samples
View attachment 601713

If you find a stamp that looks like those below, or a variation of them, it indicates the part was inspected after being heat treated. Every manufacturer used similar stamps for this process. An AN stamp means it passed military inspection as well, tho those are much less common.
View attachment 601714
Douglas part numbers follow the same pattern as your number, 199125, but there is no instant recognition of the aircraft model as on Bell, Curtiss, Consolidated and NAA aircraft as the first digit of the part number indicates the drawing size. With Douglas the -1 on the end usually indicates there are both left and right handed versions of the individual part the number is stamped into and this is a right handed (if my rusty memory is correct) version of the part. With some other manufacturers the -1 indicates the first identified/detailed part of assembly 199125. EG Spitfire part numbers all start with the drawing number of the first model the part was used on followed by, in some cases, up to over 2000 dash numbers

You are now my unequalled hero of warbird part numbering systems! Fantastic information. Thank you!
 

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