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Yakovlev Yak-7R 1942 project (2xramjets, 1x rocket engine)

AF

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Hello, i have question about Yakovlev Yak-7R project. OK, i know that Yak-7R was (probably) unofficial designation of recon version of Yak-7, but in some books i found information about project from august 1942 which was powered by one D-1A liquid fuel rocket engine (designed by Leonid S. Dooskhin) mounted in rear fouselage ande two under-wing mounted DM-4S ramjet engines. Cockpit was moved forward, piston engine was removed.

I want build scratchbuild model so i need some drawings. In book „Encyklopedie sovětských jednomotorových stíhacích letadel 1939 – 1951“ i found side draw (see image 1), but it does not fit to Yak-7 draw. On my hard-disc i have another side draw (see image 2) which i downloaded years ago from now inactive slovakian website. I think that second image is more accurate but i am not sure. Only other info about Yak-7R which i found was this web page:
http://tanks45.tripod.com/Jets45/Histories/Jak-7R/Jak-7R.htm

So my question – does anybody have more information about this project and does anybody have some drawings (3 view etc.) ???
 

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redstar72

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1.jpg picture is correct. 2.jpg isn't correct, and looks to be purely speculative. Yak-7R project actually didn't look much like Yak-7; but in spite of this, the basic fuselage girder was the same.

I attach here the Yak-7R layout drawing from the book "Yak fighters of the Great Patriotic War period" by Alexei T. Stepanets, and its comparison with the basic Yak-7 made by myself. By the way, Yak-7R was 1.325 m longer.
 

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borovik

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Six sources known to me shows the same side view of the project. (Nearly ten years ago, I made a simplified scheme, 3 v-ws, based on the data)
 

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AF

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Thank you very much :) - comparasion and 3 view are very helpful (and interesting) for me
 

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