Piston & Radial Conrod - from what engine?

[CrashBurnFly]

Morning, A friend has this and wonders if anyone can tell what it may be from?
The piston is 154mm bore.
numbered 112453 110297-wsb

Conrod numbered ?swp4 ?? 2fd1214/80 fb122899 o/s BR1 BA 846

Thanks, Paul, West Susssex, UK.

 

[herman1rg]

It's very clean for sure, what does the top of the piston look like?

 

[fastmongrel]

Wright R1820 is 6.15 inch bore which is 156mm, pistons are usually a bit smaller than the bore. It could also be from a Shvestov Ash-62 which has the same bore as the 1820.

 

[Michael Hope]

I am not an engine expert, but it can not be a Wright R-1820 as that had 9 cylinders, the connecting rod has 1 master and only six holes for other rods, which adds up to seven. The Wright R 1300 had only seven cylinders with a similar bore.

 

[XBe02Drvr]

How about one bank of a Pratt 1830?

 

[Michael Hope]

How about one bank of a Pratt 1830?

The P&W had a 5.5 inch, 140 mm bore, where the Wright R1300, R1820, R2600, & R3350 all had the approximate piston bore of 6 1/8 inches, the original post states 154 mm, which is a calculated difference of about 1.5 mm. The R1300 and R2600 are 7 cylinders per row, and the R1820 and R3350 are 9 cylinders per row.

 

[fastmongrel]

I am not an engine expert, but it can not be a Wright R-1820 as that had 9 cylinders, the connecting rod has 1 master and only six holes for other rods, which adds up to seven. The Wright R 1300 had only seven cylinders with a similar bore.

Dohh I never counted the number of Conrod holes. I think you might have cracked it.