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[SAS~Storebror]

Yak-3UA Replica with a P&W R-1830 Radial, hence the Hamilton Standard prop, you don't see those often on original soviet warplanes

Absolutely right and thanks for the picture.
It's called "Yak-3UPW" and indeed is a Yak-3U repowered by an R-1830 radial engine.

Well done.

Next quest, what's this? (Precise answer please, click to enlarge):



Best regards - Mike

[Full Metal Jacket]

what we see here is a Turbojet engine, what we are looking at here is the first stage compressor, do note the stator vanes in between the rotor vanes, and also evident by the damage to the rotor blades, it might have suffered from FOD damage in the way of sand, small rocks or dust, OR its and old engine and thats the Alluminium corroding, what make it is however, i do not know, too little to go by

[fightingirish]

I think even Sherlock would struggle with this one......any chance of another clue??

[SAS~Storebror]

any chance of another clue??

Not yet.
Thom already tried to get close to it, that's a good way.
It is possible to rule out a couple of engine types by taking a close look on this one, that should get you closer.

Best regards - Mike

[Ont_R]

Rolls Royce Spey possibly

[Full Metal Jacket]

a good shot but i don't think thats it, the intake guide vanes on the Spey are ofset on the central hub:

[SAS~Storebror]

The Spey is pretty close, albeit not correct.
Actually the engine in question exists in different versions, the more common ones have offset stator vanes on first stage as well. They (the offset vanes) had been developed during the lifetime of the engine in question and became a registered patent of the manufacturer.

I must admit that the quest is hard.
If there's no one guessing the right type, I'll give another hint later today.

Best regards - Mike

[Full Metal Jacket]

i'm starting to suspect an RR Avon actually

[SAS~Storebror]

RR Olympus?

No, take a closer look at Olympus LP compressors and you will see they differ by dimensions.

i'm starting to suspect an RR Avon actually

No, same thing: Very different first stage actors.

Time for some hint.
Same engine, different part (no larger size available):


Best regards - Mike

[Ont_R]

Rolls Royce Conway??

[Full Metal Jacket]

aye, we have a winner!



this is the very same engine

[SAS~Storebror]

Bingo! Well done Ont_R!

Here is another, more prominent view of the same stunning early jet engine (click for full size):



Time for the next quest, this time it shall be a little easier.
Guess the plane (click for full size):



Best regards - Mike