Help Identifying WWII Engine Cylinder

[texasace]

Ok here's a tough one! Im pretty sure it is WWII But I cannot find what type of plane it was off of. Hoping you guys can help!

Some identifying number are"

NO.45
C85P440
127241-1
TX369W
46
Caps labeled "Alcoa 117233 4290 A1 3"

Again thank you in advance!

 

[bobm4360]

Looks vaguely "Wright". What is the bore?

 

[texasace]

Looks vaguely "Wright". What is the bore?

What would the "Bore" be? Sorry complete novice.

 

[bobm4360]

Inside diameter of the cylinder.

 

[texasace]

Inside diameter of the cylinder.

Approx 6" d.

 

[Shortround6]

Looks a lot like a Wright.
The fins on the cylinder barrel (not the head) look like sheet metal in the Pictures

Please note that Wright used this type of cylinder finning on 9 cylinder R-1820s, 14 cylinder R-2600s and 18 cylinder R-3350s and not all engines used the same configuration of exhaust port.

 

[WJPearce]

I'm certain that is a Wright rear cylinder, and I think it is from an R-2600 engine. I don't think any R-3350 engines had the angled intake port. Some notable aircraft that the R-2600 Twin Cyclone powered were the Curtiss SB2C Helldiver, Douglas A-20 Havoc, Grumman TBF (TBM) Avenger, and North American B-25 Mitchell.

 

[texasace]

I'm certain that is a Wright rear cylinder, and I think it is from an R-2600 engine. I don't think any R-3350 engines had the angled intake port. Some notable aircraft that the R-2600 Twin Cyclone powered were the Curtiss SB2C Helldiver, Douglas A-20 Havoc, Grumman TBF (TBM) Avenger, and North American B-25 Mitchell.

Ok, that would make sense because I also acquired an escape hatch from a B-25 from the same person. Thank you and the others very much for your knowledge!

 

[AMCKen]

Ok, that would make sense because I also acquired an escape hatch from a B-25 from the same person. Thank you and the others very much for your knowledge!

And the bore in an R-2600 is 6 1/8 inches.