indranilroy wrote:I don't see much fault in Shivji's calculations (Assuming uniform acceleration). He is just using the basic mechanical equations and back of the envelop calculations which are not way off.
But we have an easier way to calculate this. Please notice the 1000 ft distance markers. The nose-wheel is up at (roughly) 2000 ft marker and the plane takes off. The think the MLG becomes airborne is 200 more feet.
So that translates to 610 mtrs for nose-wheel up and 670 mtrs for MLG up.
Indranil, where do you see the 1000ft distance markers? I am no math guru (in fact quite handicapped in math by the standards on BR) so can't really comment on Shivji's numbers. However, what I did do was simply looked at the closest runway marker (denoted by white stripes) that the LCA takes off at, and then verified that length via google maps - what i found was that the LCA took off just before the 6th marker on the strip (starting from a standstill at HAL runway, direction didn't matter), and that was how I came to the
conservative 750 meter distance.
But YES, I redid the same thing again, and I would agree that wheel-up happened around 600 meters just BEFORE the 5th marker lines.
I know it is not the most sophisticated or even accurate method, but is my best guesstimate
CM.