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Thrust vectoring Sukhoi Su-30 MKI Part II

Updated on January 5, 2013

Do you think that V-22 Osprey has better thrust vectoring system than Indian Sukhoi Su30 MKI

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This hub is the second edition to my previous hub Sukhoi Su-30 MKI - Purpose of Thrust Vectoring. In my previous hub, we talked about what is thrust vectoring, what is 2D and 3D thrust vectoring, how thrust vectoring nozzle is controlled in Sukhoi, some facts which make thrust vectoring difficult for other planes, and which other aircrafts are using the thrust vectoring system.

In that hub, I promised that I would share some advanced aspects related to the thrust vectoring system, so first of all, I will start with comparing Sukhoi with V-22 Osprey which is a short takeoff landing and vertical takeoff landing multi mission tilt rotor aircraft.

Thrust Vectoring Indian Sukhoi MKI versus American V-22 Osprey

Some vital information on V-22 Osprey

The V-22 is meant to operate at subsonic speeds, in a regime at which, the jet is highly inefficient. It has been made to cater to requirements of all 4 US armed services.

Thrust vector testing of V-22 by US

What Americans wanted to test in the V-22 was whether the concept of rotating the whole engine mounted at the wing tips is a feasible idea or not. Now, this is easier to do in the propeller than the jet, since in the jet, we have to take care of a number of other factors like jet intake and exhaust, etc. now when I say easy, I mean in a relative sense only. Designing such a bearing-based structure is very difficult. However, the conclusion was that such a configuration is very problematic in terms of stability issues.

It is like this, initially the V22 is on the ship deck and the engines are in a vertical configuration like in a helicopter, so the V-22 lifts off easily like a helicopter, now the problem comes when it switches over from this configuration to the regular propeller based a/c configuration, i.e., the engines rotate, so that now the thrust is in the horizontal direction so that the weight of the aircraft is supported by lift now and not the engines.

During this transition, the stability issues are significant and the Americans found that these problems are fairly complicated rendering the concept not viable in the short term.

Now propellers just make more sense when we talk about such a configuration because remember that in a jet engine, the efficiency is very low when the forward velocity is low. Besides V-22, Harrier is somehow able to solve this problem by boosting the exhaust; however, if you rotate the whole engine, then you are changing the flow of the intake air, which is a big factor in deciding the efficiency. Due to these problems, the propeller becomes an obvious choice.

Another example to study such a configuration is to look at the fairly common RC planes that exist nowadays often called the T-type. You can find some built and tested models on some Australian and American universities.

These planes have fixed engines on their wings with propellers providing thrust in the horizontal direction but their tails are designed such that the plane can actually stand on the tail rather than kept horizontally on landing gears like a normal plane, so the plane just takes off with its nose up, achieving a vertical take-off like a helicopter. Once it is at the required altitude, another small booster engine (a small prop at the tail) is fired to give a moment about the center of gravity to align the plain horizontally and then the thrust points in the horizontal direction again, so here we are using a separate booster engine to vector the thrust back to the normal direction and in V-22 Osprey, they simply tilt the engine.

P.S.: Despite the fact that the V-22 was mostly a failure in terms of validating the feasibility of using a new concept commercially, it is a cool plane and there are several great desktop backgrounds of V-22 that can be found on the net. For any aviation fanatic who has a mechanical background, the V-22 and the A-10 form great backgrounds on their computers.

Osprey V-22 Tilt Rotor Aircraft Over Ocracoke Island

Sukhoi Superjet 100 design
Sukhoi Superjet 100 design
V-22 osprey testing
V-22 osprey testing
American V-22 osprey
American V-22 osprey
V-22 VTOL STOL
V-22 VTOL STOL
Osprey Mechanics
Osprey Mechanics
V-22 osprey design
V-22 osprey design
Thrust vectoring nozzle control system
Thrust vectoring nozzle control system
Sukhoi Cobra maneuvers
Sukhoi Cobra maneuvers
Is Sukhoi's minimum turn radius zero
Is Sukhoi's minimum turn radius zero
Harrier Thrust vectoring system
Harrier Thrust vectoring system

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    • profile image

      Neil 

      6 years ago

      F-35 and F-22 were never even in the MMRCA competition., it was teh F-18 Super Hornet and F-16 Block 60.

      The American congress has put a ban on export of F-22 to any country and F-35 does not meet Indian requirements.

    • profile image

      Hemu 

      6 years ago

      Nice,, do you think that refusing f-35, f-22 in MMRC deal is a good decision.

    • profile image

      Neil 

      7 years ago

      Good effort.

      However I am not sure it was the correct idea to compare V-22 Osprey with Su-30MKI since both serve completely different purpose.

      The V-22 is a VTOL/STOL aircraft powered by Turbo-prop engines whereas the MKI is a Jet Engine powered aircraft design to perform extreme maneuvers in an aerial battles. The MKI was not designed to be a VTOL/STOL aircraft. Moreover the MKI is a combat aircraft whereas the V-22 is a transport aircraft.

      Don't compare a Ferrari with a Rolls Royce. Both fall in totally different classes although both are awesome in their own way. Do get my drift?

    • soni2006 profile imageAUTHOR

      Rajinder Soni 

      8 years ago from New Delhi, India

      I didn't get it but anyway, thanks for your comment and visit Nirnaya.

    • profile image

      nirnaya basnet 

      8 years ago

      i think it is too bad and good think us because this is back presser of future

    • Alexander Mark profile image

      Alexander Silvius 

      9 years ago from Portland, Oregon

      Informative hub, I never considered the V-22 as a thrust vectoring vehicle. Does that then make a helicopter a thrust vectoring vehicle as well since it uses the same mechanism for hovering also for multi-directional flight?

    • soni2006 profile imageAUTHOR

      Rajinder Soni 

      9 years ago from New Delhi, India

      It took me three days worth of research before writing out this hub on purpose of thrust vectoring nozzle.

    • profile image

      Warplane lover 

      9 years ago

      Yes I agree with kmadhav that the research is really astonishing and I am amazed by the results.

    • soni2006 profile imageAUTHOR

      Rajinder Soni 

      9 years ago from New Delhi, India

      Yes I have done a lot of research before writing this hub.

    • Kmadhav profile image

      Kmadhav 

      9 years ago from New delhi

      wow, what a hub. great research you done on this topic.

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