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15 votes
Accepted

What is this item on the nosewheel of the Sukhoi PAK-FA?

It is a mud guard/FOD deflector, which is found in almost all Russian combat aircraft operating from land bases. This is basically a reflection of the Russian philosophy of aircraft operations: ...
aeroalias's user avatar
  • 100k
12 votes

Why was the Sukhoi Su-47 Berkut never adopted for service?

I do not have inside knowledge, but think it is easy to explain why the Su-47 did not progress beyond the prototype stage: Sukhoi enjoyed great export success with the Su-27 and its derivatives in ...
Peter Kämpf's user avatar
6 votes

What is this item on the nosewheel of the Sukhoi PAK-FA?

It's basically a mud deflector. Prevents or reduces rocks, mud, or other FOD that the nose wheel kicks up from getting airborne and either smashing into the airframe or being ingested by the engine. ...
Romeo_4808N's user avatar
  • 74.1k
5 votes

Why do the engines of the PAK FA (Sukhoi T-50) seem not to be not aligned parallel to each other?

The Sukhoi T-50 operates Thrust vectoring nozzle control at low speeds. The nozzles are a part of the Fly By Wire system and will deflect as per the control input given by the pilot. The nozzles move ...
Adder's user avatar
  • 1,452
3 votes

Why was the Sukhoi Su-47 Berkut never adopted for service?

The Su-47 was not a fifth generation fighter. It is an advanced fourth generation. Third generation fighters had invested their entire design into a certain set of attributes, most notably high speed ...
Maury Markowitz's user avatar
2 votes

Why was the Sukhoi Su-47 Berkut never adopted for service?

The Su-47 was started as an advanced multi-role fighter, and first was designated S-37 (do not confuse for Su-37). Later it was selected as an advanced carrier-based fighter, renamed to Su-27KM, ...
Eugene's user avatar
  • 386
1 vote

Why was the Sukhoi Su-47 Berkut never adopted for service?

Among other factors: timing When we take a look at certain dates: Su-27: first flight 1977, introduction 1985 Su-47: first flight 1997 PAK FA: first flight 2010 we see that the first flight of the ...
Dohn Joe's user avatar
  • 1,318

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