lol.. no. You said KN > Kgf marginally, IIRC. But it was the other way around.
What I meant was that 130kN will provide more thrust than 13000kgf. Thought the remaining part of the post should have clarified that, still should've been more clear i s'pose.
Each Al-31f weighs 1.6 tonnes! So 2 engines weight around 3.2 tonnes. Avionics, radar, Hydraulics, cockpit, TVC weighs around.. say.. another 2 tonnes.
So 18400-5200= 13200
13200 X.06 = 792
792 X .4 = 317 kgs weight saving.
think the MKI's TVC alone will weigh that much. MKI most probably is heavier than MKK.
I heard MKK's tail section is different. So it may put on some weight there.
BTW, this page of Milavia does not quote Su-30mkk's weight:
http://www.milavia.net/aircraft/su-27/s ... ations.htm
Even the 18400 is an educated guess I think, since generally Russians don't release empty weights.
Also the BR's page does not say anything about composites. The vayusena tripod page(a fan site?) says it's a rumor.
Look at in terms of where the MKI is different from the MKK (at least cursorily) - canards, TVC, HUMS, OBOGS?. THese would add weight. At the same time advanced avionics components such as LCDs, processors and analog replacements should save weight, plus the addition of composites.
There is little to doubt that composites have been used in the MKI - ithink production images show this, esp along the fins and on the fuselage. Moreover there are other sources apart from the Vayu site:
* Many of the sophisticated features of the Su-30MKI were to be derived from another advanced Su-27 variant, the single-seat "Su-27M", designed by a team under Nikolai Nikitin of the Sukhoi OKB beginning in the early 1980s. The idea was to build a single-seat multirole fighter that could excel as an interceptor, an air-superiority fighter, and a strike aircraft, to complement or replace the first-generation Su-27S in VVS service.
This was demanding, particularly because in many cases aircraft designed for multiple roles don't necessarily excel at any one of them. The Su-27M needed to carry avionics for air combat, strike navigation, and targeting of laser or TV guided smart munitions, and was to have an advanced FBW system for high agility. It was also to be fitted with canards and "wet" tailfins for additional fuel. The new kit meant an increase in empty weight and a corresponding degradation in performance. The Sukhoi OKB felt the weight increase could be dealt with though improved AL-31FM or AL-35 engines, and through reductions in weight using composite materials and lithium-aluminum alloys.
.
http://www.vectorsite.net/avsu27_2.html
More clearly, from ACIG and masterspy Harry:
HAL and ADA have tied up to chart out a programme that will dramatically increase the % of composites in the airframe, compared to the current 6 %.
http://www.acig.org/exclusives/aero/aci ... 5_su30.htm
Also, look up the article on BRD 11 - it was replacing OEM parts with composite panels and skins on the IAF BAAZ; with so much experience in working with the LCA composite structures, it would be strange if the MKI did not see good use of composite structures. IIRC.
CM