Indian Missile News And Discussion

[Guest]

Recalling info for 4 decades ago - the earth rotates at 1600 kmph - and that would mean 260 Km extra flight (about 8 % extra free) towards the east for a 10 minute flight no?





It all depends, hence there are new softwares like six degree freedom, which are programmed into a modern ICBM n MIRVs to compensate 4 the effects of earth rotation, great circle, coriolis effect, Centripetal force, azimuth, state vector, Newton´s first law, (which have 2 be taken into account) so that the warhead is not even slightly displaced from its impact point, as the re-entry vehcle has to travel upward (exoatmosphere) after a lift off (apx 400KM) while oblate spheroid earth is still rotating one way on its axis at the speed of 29.8 KM a second.



By the time my post is read lets say half a minute - The earth has already moved abt 900 KM.......



The result of the Coriolis Effect is:



Projectiles are deflected towards the right at northern latitudes.

Projectiles are deflected towards the left at southern latitudes.

Modern long-range missile guidance systems are designed to CORRECT for the Coriolis Effect.



Also affects low-pressure systems & storms:



Hurricanes in the Northern Hemisphere rotate anti-Clockwise

Tropical Cyclones in the Southern Hemisphere rotate Clockwise



Let me quote David Wright, a scientist:



While the earth’s rotational velocity does affect the velocity requirements for a satellite n exo-launch vehicles, it does not contribute significantly to the range of short-range missiles. This is because the contribution of the earth’s rotational velocity to the range of the missile is nullified to a large extent because both the launch and the impact points of the missile rotate with the earth during the duration of the missile’s flight.



No free lunch here!