Snautzer01
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Uhmm no.
Engineman's WW2 Aircraft Parts Quiz!
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- #282
OK. Here is some extra info folks!
ian has correctly id'd 1 R as a Merlin piston, 1 L next to it is from the famous WW2 American V12.
The second pair are from; the most numerically common engine of the Augsberg Eagle, and the other one powered most of the other famous German fighter!
Go for it!
Eng
Tony Kambic
Airman 1st Class
I see that one at the upper left then must be from an Allison V1710.
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- #284
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- #285
So, here is another big clue, in the second photo, you have pistons from the two most important German Fighter engines in WW2. The one on the left has a bore of 154mm, the one on the right has a bore of 156mm. If you look carefully you can read the part number that starts with the engine type on the right one!
Good luck!
Eng
Good luck!
Eng
Tony Kambic
Airman 1st Class
Bottom Right, Jumo 211.
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- #287
I see the similar look from the profile, but the Jumo 211 piston has a bore size of 150mm and this is 156mm and it goes in a 2-valve cylinder!
Cheers
Chris
Snautzer01
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Bmw 801 ?
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- #289
Great call Snautzer! Correct BMW 801. So, that leaves just the last one 2 L. Any chancers out there know the most important Bf 109 engine with 154mm bore?
Eng
- Thread starter
- #290
So, well done all those who joined or looked at the Piston quiz! It does require considerable research to get detailed info about this subject, the Merlin is possibly one of the easier ones to research and the Rolls Royce Heritage Trust books are quite good.
So, starting with the 1 L piston, a Allison F-2R or L from a P-38. This was from a crash dig in Germany and shows a high-speed impact with the con-rod ripped-off!
That said, it is recognisable and carries a large number of marks, including the 6L installation marks which show it to be from the front Left cylinder, which is different to the RR numbering which has the front cylinders as number 1!
This is a historic relic from the daylight bomber escort war! These pics are from the engine manual online.
Eng
So, starting with the 1 L piston, a Allison F-2R or L from a P-38. This was from a crash dig in Germany and shows a high-speed impact with the con-rod ripped-off!
That said, it is recognisable and carries a large number of marks, including the 6L installation marks which show it to be from the front Left cylinder, which is different to the RR numbering which has the front cylinders as number 1!
This is a historic relic from the daylight bomber escort war! These pics are from the engine manual online.
Eng
- Thread starter
- #291
The next piston, 1 R, is a Rolls-Royce Merlin 25, which was basically a 24 with reversed coolant flow for the Mosquito. This is a late war built engine with late standard pistons. Rolls-Royce improved their product as developments were made and many improvements were incorporated into the later-built engines. The Merlin 25 was built for several years (1943-47) and this was probably built in 1944/45.
This is a crash engine and the crown is a bit corroded. This piston is stamped A 4, which makes it from the RH cylinder block, 4th back from the front. The illustration below is from the RRHT Merlin in Perspective book. You can see how early Merlin pistons were skirted, and how RR made many modifications. This piston is similar to the "mod 742" shown and is very similar to the pistons in the Merlin 100. A great piston.
Eng
This is a crash engine and the crown is a bit corroded. This piston is stamped A 4, which makes it from the RH cylinder block, 4th back from the front. The illustration below is from the RRHT Merlin in Perspective book. You can see how early Merlin pistons were skirted, and how RR made many modifications. This piston is similar to the "mod 742" shown and is very similar to the pistons in the Merlin 100. A great piston.
Eng
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Snautzer01
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DB605
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- #293
Snautzer01
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Well you had to spoon feed it...
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- #295
OK, So Snautzer rounds this off with his correct call of DB 605 for pic 2 L.
This is a mid to late war example of the famous Bf 109 G engine. The DB 605 had a large number of developments and improvements and pistons were many times modified. Not least was the changes in material specification in the late war period. The strange thing is that the illustrations in the parts catalogue remained the same for the DB 605 A and in fact, the illustration used is an old DB 601 E one! However, this piston is a mid/late one, made to suit the updated DB 605 A/B from Autumn 1943 onwards. The design is skirtless, with a similar configuration as the late Merlin piston. The information on the underside of the piston pin bosses is good. This one shows a fairly common mid-war abbreviation of the engine number on the piston to 881, although the engine will have had a full 8-Digit engine number like, 00702881 which would be a Genshagen made late 1943 DB 605, but it could be a later built engine as we don't have the full number. It is also shown as cylinder number 11, which in the DB numbering of 1 to 12 was one pot forward of the rear left corner. You may also see the BAL ministry approval stamp, the weight of 1904grammes, the fitting size 153.57mm and other details.
This is from another recovered Bf 109 G engine and is suitable for re-use with refinishing and testing.
Overall, another historic item.
Eng
This is a mid to late war example of the famous Bf 109 G engine. The DB 605 had a large number of developments and improvements and pistons were many times modified. Not least was the changes in material specification in the late war period. The strange thing is that the illustrations in the parts catalogue remained the same for the DB 605 A and in fact, the illustration used is an old DB 601 E one! However, this piston is a mid/late one, made to suit the updated DB 605 A/B from Autumn 1943 onwards. The design is skirtless, with a similar configuration as the late Merlin piston. The information on the underside of the piston pin bosses is good. This one shows a fairly common mid-war abbreviation of the engine number on the piston to 881, although the engine will have had a full 8-Digit engine number like, 00702881 which would be a Genshagen made late 1943 DB 605, but it could be a later built engine as we don't have the full number. It is also shown as cylinder number 11, which in the DB numbering of 1 to 12 was one pot forward of the rear left corner. You may also see the BAL ministry approval stamp, the weight of 1904grammes, the fitting size 153.57mm and other details.
This is from another recovered Bf 109 G engine and is suitable for re-use with refinishing and testing.
Overall, another historic item.
Eng
- Thread starter
- #296
Lastly from this piston quiz, we have the BMW 801 D. This piston is from a mid 1942 built engine with the number 3701. The big 14 cylinder BMW did change a lot over the war period and the pistons changed between the C and D types, with them losing the ribbing on the underside of the crown. Another feature is the shallow dome of the 801 D piston crown, compared to the flat-topped 801 A and C pistons. This piston is from a crashed and recovered engine and it has some crash damages and marks from the recovery. However, it is in reasonable condition, with a considerable number of cast and stamped detail marks. This is another historic item.
Cheers
Eng
Cheers
Eng
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- #297
SaparotRob
Unter Gemeine Geschwader Murmeltier XIII
Wing tip light mount? I'm done.
Snautzer01
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Thats were i am going. But underwing.
cammerjeff
Staff Sergeant
ADF Antenna?
