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You are right - they indicate a side mounting so that rules out turret motors and narrows it down considerably. As you say a hydraulic pump is likely as is a propeller feathering pump on aircraft with Ham Std props. A lot of aircraft of the time also carried similar fuel pumps but I do not know if the B-29 did.I have been wondering how the two bolts which stuck out from the outer case were used as not seen in turret photos.
I might have found a clue with this diagram.
Motor: Air Associates Model EE-125M1/EE-1370
Size: Unknown
View attachment 649593
Source: Overhaul Instructions for Air Associates Electric Motors
I do not ensure the exact model number for the relic as there seemed several similar models but your summary is what I have suggested, Tanaka-san.Shimpachi-san, MiTasol,
Thank you so much.
Am I correct to say at this stage;
1) Not generator on APU, not servo motor in autopilot system, not tail gun turret motor;
2) It is considered that No.25 & 29 and the other some parts on the attached are the ones;
3) Likely be the one attached to hydraulic pump somewhere
And, if you elaborate 'propeller feathering pump on aircraft with Ham Std props', it would be greatly appreciated.
As it was found nearby tail part of the B-29, would like to check if it does not related to propeller related item.
Regards, mt