МиГ-21бис with fowler flaps????

Привет Лоран,

As you can see, sometimes there are contradictions between books written by famous specialists and... facts. 8)
(see your PM)

Спасибо Андрей for these facts about МиГ-21ПФМ. :D

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Сообщение от Jean-Philippe

As you can see, sometimes there are contradictions between books written by famous specialists and... facts. 8)

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Not facts. Information.
In the article "The first all-weather generation: MiG-21PF fighter and its derivatives" from Airfleet 3.2003, Type 94 designation was used both for the PFS and the PFM. Type 77B was for the MiG-21FL.

Good, you had the right behaviour. It is information of course, not yet facts.
:wink:

No, about eqail early and late MiG-21PFM in using SPS system - it is my guess, at my look two so difficult fighters can't have one modification code PFM, as i suppose main differences between its - new canopy and seat.

By the way i dont know why, but in ex-GDR Air Force (NVA/LSK) MiG-21PFM (operate only late type MiG-21PFM) officially called MiG-21SPS (SPS-K if was mounted GP-9 underfuselage gun pod), so it is another one fact - late MiG-21PFM had SPS system.
About early type - i don't have full information, but IMHO early MiG-21PFM had this system too:
1. MiG-21PFS had this system.
2. MiG-21PFM was upgraded version MiG-21PFS with same engine.
3. Late MiG-21PFM had SPS flaps, so why early MiG-21PFM hadn't its?

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Сообщение от Котков Андрей

No, about eqail early and late MiG-21PFM in using SPS system - it is my guess, at my look two so difficult fighters can't have one modification code PFM, as i suppose main differences between its - new canopy and seat.

By the way i dont know why, but in ex-GDR Air Force (NVA/LSK) MiG-21PFM (operate only late type MiG-21PFM) officially called MiG-21SPS (SPS-K if was mounted GP-9 underfuselage gun pod), so it is another one fact - late MiG-21PFM had SPS system.
About early type - i don't have full information, but IMHO early MiG-21PFM had this system too:
1. MiG-21PFS had this system.
2. MiG-21PFM was upgraded version MiG-21PFS with same engine.
3. Late MiG-21PFM had SPS flaps, so why early MiG-21PFM hadn't its?

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Спасибо Андрей,
I was only wondering about SPS flaps on late МиГ-21ПФМ, and you answerd my question! :D
So if I want to build a Russian МиГ-21ПФМ from the Zvezda model, I have to modify the flaps because Zvezda had moulded the wings with fowler flaps.
Am I right?

Returning to old discussions.

Today i see technical manual to MiG-21PFM (1969 year issue) - it is not different between this submoficaton (as say in this book from Gorkiy aviation plant), this one boook for both submodification, it is only one differences - two subchapters in chapters about canopy (one piece canopy for early PFM, two piece canopy for late PFM) and seats (SK - early PFM and KM-1(1M) for late PFM).

As write in this manual both PFM version had SPS system with absolutly eqail control panele this sysytem.

So SPS system vas mounted on both submodifacations MiG-21PFM.

Спасибо Андрей! :D

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Сообщение от Котков Андрей

So SPS system vas mounted on both submodifacations MiG-21PFM.

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Thank you very much for the informations but I do not draw the same conclusions than you. Here are mine:
1) MiG-21 PFMs either had single or two pieces canopies (a lot of people would disagree to that)
2) MiG-21 PFMs in 1969 all had the SPS

What about first production MiG-21PFMs built in 1964 ? If all PFMs had SPS flaps, what's the version of Kiev's MiG-21 which appears to have Fowler flaps ?
Thanks again for prooving that PFMs could have PF type canopy and seat !

Laurent