Kartik wrote:LCA AF Mk2 variant - the most details that we've got so far, from ADA's 31st Annual Report for 2015-2016. Next year's report will reveal what has transpired with relation to the LCA AF Mk2 variant in 2017.LCA AF Mk2
The changes in NMG have resulted in drag reduction and increase in fuel content by about 20kg. These improvements are going to result in improved point and mission performance.
Aerodynamics : A number of aerodynamics improvements have been carried out to reduce drag and improve performance:
• Drag reduction studies have been completed. Canopy reshaping, outer cowl modification, actuator fairing extension and supersonic pylons have resulted in approx 20 counts (8%) drag reduction in supersonic regimes.
• Wind Tunnel studies have been completed.
• Aero loads computations have been completed.
Increase of only 20kg..? What exactly they are referring to here..? Increase in existing fuel tanks only..?
Also, data point for LCA drag - 20 counts reduction ~ 8% >> baseline drag must be ~250 counts. But its not clear whether they are talking about only supersonic wave drag or total drag. I suppose its the former.
Another figure was mentioned in the Canopy optimization paper from one of the conferences.
http://www.nal.res.in/CFDsympo17/cfdful ... rcraft.pdf
50kg fuel increase and 12 count reduction (~6%) in supersonic wave drag due to canopy reshaping. Which means other 8 counts is due to other factors mentioned above. The 12 counts reduction had increased transonic acceleration by 20%, so total of 20 counts would increase it even further, may be by >30%.