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By: - 9th February 2006 at 13:17 Permalink - Edited 1st January 1970 at 01:00
It is known that Mig-29 has capability to take-off/land from/on unpaved runways and rough fields.Does su-27/30 has also this capability, if so, what are constrains in terms of weapon and fuel payload.
Several Russian runways are in a state, that some "rough fields" capability is mandatory
By: - 10th February 2006 at 06:00 Permalink - Edited 1st January 1970 at 01:00
The Su-27s have grills which drop down and shield FOD from the engines. They're grills though and not actual doors like on the FULCRUM, hence air can pass through and there's no need for overwing louvres to get air into the engine. That's probably because the FLANKER's intakes sit higher off the ground than the FULCRUMs do, I'd guess. As for the rest of the FLANKER series, the more mdoern variants, I'm not really sure, I never bothered to look!
By: - 10th February 2006 at 11:16 Permalink - Edited 1st January 1970 at 01:00
The Su-27s have grills which drop down and shield FOD from the engines. They're grills though and not actual doors like on the FULCRUM, hence air can pass through and there's no need for overwing louvres to get air into the engine. That's probably because the FLANKER's intakes sit higher off the ground than the FULCRUMs do, I'd guess. As for the rest of the FLANKER series, the more mdoern variants, I'm not really sure, I never bothered to look!
The opposite is true - the 'modern' MiG-29's - MiG-29SMT, M2, K, OVT etc have all done away with the upper LERX louvres - in order to house more fuel.
That means they no longer have a retractable FOD door blanking off the man intakes.
The Flanker on the other hand retains the retractable mesh FOD screen in all variants AFAIK.
The new trainer, the Yak-130, has a neat arrangement whereby the anti-FOD door folds down to blank off the intake, opening up an intake in the top of its LERX.
When retracted, it forms the 'roof' of the intake - so a single door either blanks off the main intake or the LERX intake. It also has further intake doors in the LERX/spine.
Ken
By: - 10th February 2006 at 11:16 Permalink - Edited 1st January 1970 at 01:00
Actually the MiG-29M switched to grills like the Su-27, though its intakes are no further away from the ground. I believe the louvre doors and ramp arrangement was deemed excessive to requirements.
By: - 10th February 2006 at 12:36 Permalink - Edited 1st January 1970 at 01:00
The Su-27s have grills which drop down and shield FOD from the engines. They're grills though and not actual doors like on the FULCRUM, hence air can pass through and there's no need for overwing louvres to get air into the engine. That's probably because the FLANKER's intakes sit higher off the ground than the FULCRUMs do, I'd guess. As for the rest of the FLANKER series, the more mdoern variants, I'm not really sure, I never bothered to look!
FLANKER's intakes sit do not higher off the ground than the FULCRUM's do. The idea with ramp doors has proven as unnecessary, pretty heavy and space-consuming. Solution can be seen on the pic.. MiG-29M and MiG-29Ks have grills similar to those of Su-27 series. BTW, tests have revealed that the grills, when applied, decrease the overall performace of the enginess by some 3 per cent.
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By: fft - 9th February 2006 at 11:58
It is known that Mig-29 has capability to take-off/land from/on unpaved runways and rough fields.
Does su-27/30 has also this capability, if so, what are constrains in terms of weapon and fuel payload.