What is the Terminal velocity of a Ballistic Missile Warhead? Mach 17 here.

[Mrc]

There is only 20_ 25 sec from reentry to boom..u dont need to hit the ground with nuclear payload.. its detonated by other means and maximum damage occurs if detonated few km above ground (no energy waisted in crater formation). dont really need to maneuver inside atmosphere i would say... if your final approach is unpredictable ... it will take quiet few seconds to calculate your final trend ... few more seconds to calculate a firing solution than u have to communicate with interceptor and align it... not enough time ... if u are off by 1/2 second u miss target flying at 5km/s by 2.5 km...

What bmd does is calculate ballistic tragectory... confirm it several times over minutes (as speed may and will vary ) and than put an interceptor in the path for head on collision... the minute u change ballistic tragectory... all calculations are off.. pakistani missiles do it several times (interested indians can find their own links)

U really dont actually need within atmosphere maneouvering unless your target is a maneuvering ship trying to avoid u ( df 21 d).. i am really hoping pak would test that soon... iran has recently tested an anti radiation ballistic missike on moving sea target...confirmed by US... north korea is experimenting as well using a medium range missile it seems....

Here our indian """"experts""""" think they are generations ahead and such maneuvering is impossible

 

[Safriz]

There is only 20_ 25 sec from reentry to boom..u dont need to hit the ground with nuclear payload.. its detonated by other means and maximum damage occurs if detonated few km above ground (no energy waisted in crater formation). dont really need to maneuver inside atmosphere i would say... if your final approach is unpredictable ... it will take quiet few seconds to calculate your final trend ... few more seconds to calculate a firing solution than u have to communicate with interceptor and align it... not enough time ... if u are off by 1/2 second u miss target flying at 5km/s by 2.5 km...

What bmd does is calculate ballistic tragectory... confirm it several times over minutes (as speed may and will vary ) and than put an interceptor in the path for head on collision... the minute u change ballistic tragectory... all calculations are off.. pakistani missiles do it several times (interested indians can find their own links)

U really dont actually need within atmosphere maneouvering unless your target is a maneuvering ship trying to avoid u ( df 21 d).. i am really hoping pak would test that soon... iran has recently tested an anti radiation ballistic missike on moving sea target...confirmed by US... north korea is experimenting as well using a medium range missile it seems....

Here our indian """"experts""""" think they are generations ahead and such maneuvering is impossible

20-25 seconds of atmosphere flight is for ICBM.
For Pakistani MRBM such as Shaheen series and Ababeel it's more like 60-90 seconds, owing to slower reentry speeds.
But from ABM perspective THAAD needs 210 seconds to detect, track,calculate and then fire the missile. If incoming target parameters change then it's another 210 seconds.
How much time does Indian AAD PAD needs? Has to be more than THAAD.
Pakistani missiles use late release to dodge Indian ABM.
The RV BUS doesn't release the warhead until very later, I.e just above the Atmosphere.
Until then the RV BUS along with the warhead, keeps firing sideways thrusters to keep changing trajectory.

 

[Mrc]

20-25 seconds of atmosphere flight is for ICBM.
For Pakistani MRBM such as Shaheen series and Ababeel it's more like 60-90 seconds, owing to slower reentry speeds.
But from ABM perspective THAAD needs 210 seconds to detect, track,calculate and then fire the missile. If incoming target parameters change then it's another 210 seconds.
How much time does Indian AAD PAD needs? Has to be more than THAAD.
Pakistani missiles use late release to dodge Indian ABM.
The RV BUS doesn't release the warhead until very later, I.e just above the Atmosphere.
Until then the RV BUS along with the warhead, keeps firing sideways thrusters to keep changing trajectory.

Shaheen 3 can be scooped up.to achieve a very high reentry speed if required... total flight time from lauch to hitting delhi is around 3 minutee i ve been told... dont ask for source

 

[The Deterrent]

@amardeep mishra @HRK @The Deterrent and others interested

Also, I just watched the video. You are basing your entire calculations on the presumption that the video starts when re-entry begins at 100km altitude, based on the re-entry glow. Which is why your calculations are quite off the mark.

Please be informed that deceleration is quite slow from around 100 to 60/50km (meaning little friction, hence little to no 'glow'), from thereon rapid deceleration occurs till around 20/10km (this window is based on the Beta coefficient of the RV. The better it is, the lower the altitude at which the RV actually 'hits' the atmosphere and decelerates). Afterwards the deceleration begins decreasing as the decrease in velocity slows down.

Shaheen 3 can be scooped up.to achieve a very high reentry speed if required... total flight time from lauch to hitting delhi is around 3 minutee i ve been told... dont ask for source

Kindly ask your source to either attend some Aerospace 101 classes or not indulge in jingoistic gossips.

 

[Mrc]

Kindly ask your source to either attend some Aerospace 101 classes or not indulge in jingoistic gossips.

So scooping up wont increase speed??

 

[The Deterrent]

So scooping up wont increase speed??

Scooping what up?

 

[Mrc]

Scooping what up?

Ballistic trajectory

 

[The Deterrent]

Ballistic trajectory

Sure, that's how BMs achieve minimum range (the lower end of their entire engagement envelope). That would essentially mean a higher trajectory, taking even more time than standard. However if you push it too much, the RV will burn up on re-entry.

There is no way any ballistic missile that Pakistan has can hit Delhi in under 3 minutes. Unless of course if you take a Nasr vehicle close up.

 

[Mrc]

Sure, that's how BMs achieve minimum range (the lower end of their entire engagement envelope). That would essentially mean a higher trajectory, taking even more time than standard. However if you push it too much, the RV will burn up on re-entry.

There is no way any ballistic missile that Pakistan has can hit Delhi in under 3 minutes. Unless of course if you take a Nasr vehicle close up.

Rv of icbms dont burn up on reentry ... i dont expect rv of a mrbm or irbm to burn up with higher speed with scooped trajectory..

3 minutes comment was from a defence official... whats total flight time a missile takes at mac 15 to travel 2500 km (normal ballistic trajectory) .. about 9 minutes?? Fire it from punjab to delhi... 700 km ... scooped trajectory to 1000 km and return at a lot bigger mac number... 3 may be 4 minutes?? Or am i missing some thing

 

[The Deterrent]

Rv of icbms dont burn up on reentry ... i dont expect rv of a mrbm or irbm to burn up with higher speed with scooped trajectory..

The 'burning up' doesn't have to do with the speed, rather the re-entry angle. If the trajectory is too much 'scooped up', the RV will have to enter the atmosphere at a very high angle, which can result in a very expensive fireworks show.

3 minutes comment was from a defence official...

Well as I said, ask him to not talk about stuff that he doesn't really knows about.

whats total flight time a missile takes at mac 15 to travel 2500 km (normal ballistic trajectory) .. about 9 minutes?? Fire it from punjab to delhi... 700 km ... scooped trajectory to 1000 km and return at a lot bigger mac number... 3 may be 4 minutes?? Or am i missing some thing

Whoa whoa whoa, easy there. Please go through projectile motion, how the velocity is highly variable, and then go through ballistic missile trajectories. Its not as if the missile travels in a straight line at ground level at the highest velocity it can achieve.

The realistic estimate of time for striking a target at around 2500km is somewhat around 15 minutes.

 

[Mrc]

The 'burning up' doesn't have to do with the speed, rather the re-entry angle. If the trajectory is too much 'scooped up', the RV will have to enter the atmosphere at a very high angle, which can result in a very expensive fireworks show.

Well as I said, ask him to not talk about stuff that he doesn't really knows about.

Whoa whoa whoa, easy there. Please go through projectile motion, how the velocity is highly variable, and then go through ballistic missile trajectories. Its not as if the missile travels in a straight line at ground level at the highest velocity it can achieve.

The realistic estimate of time for striking a target at around 2500km is somewhat around 15 minutes.

Total flight time for minute man 2 is 30 minutes ... at mach 23 to travel 13000 km...

It wont take 15 minutes to hit 2500 km at mach 15...

Boost phase is around 3 minutes... travel time around 7...

The 'burning up' doesn't have to do with the speed, rather the re-entry angle.

That angle can b adjusted by post separation maneuvering system... to an acceptable value i guess

 

[The Deterrent]

Total flight time for minute man 2 is 30 minutes ... at mach 23 to travel 13000 km...

It wont take 15 minutes to hit 2500 km at mach 15...

Boost phase is around 3 minutes... travel time around 7...

Ballistic missiles don't travel all the time at the burn-out peak velocity. Both boost phase and reentry take a huge chunk of time. Also, as I said missiles don't travel in a straight line. Even if they did, a missile can cover only 2100km in a straight line at constant Mach 15. Please see the following image.

That angle can b adjusted by post separation maneuvering system... to an acceptable value i guess

If only it was as simple as that. If the RV hits the atmosphere at an angle different than its angle of approach, it will simply explode because the main body of RV cannot take the aerodynamic stresses. Only the 'tip' can.

I highly recommend again to study ballistic missile trajectories. By mere assumptions you cannot arrive at the logical answer.

 

[Mrc]

Ballistic missiles don't travel all the time at the burn-out peak velocity. Both boost phase and reentry take a huge chunk of time. Also, as I said missiles don't travel in a straight line. Even if they did, a missile can cover only 2100km in a straight line at constant Mach 15. Please see the following image.

If only it was as simple as that. If the RV hits the atmosphere at an angle different than its angle of approach, it will simply explode because the main body of RV cannot take the aerodynamic stresses. Only the 'tip' can.

I highly recommend again to study ballistic missile trajectories. By mere assumptions you cannot arrive at the logical answer.

Scooped trajectory was first and actually most accepted method of dodging an abm by sheer speed... its well recogenised ... and i have never read the objectiin you are making sir...

By this logic ...lofted trajectory is not possible at all?? Is that what u are saying??

 

[Safriz]

Ballistic missiles don't travel all the time at the burn-out peak velocity. Both boost phase and reentry take a huge chunk of time. Also, as I said missiles don't travel in a straight line. Even if they did, a missile can cover only 2100km in a straight line at constant Mach 15. Please see the following image.

If only it was as simple as that. If the RV hits the atmosphere at an angle different than its angle of approach, it will simply explode because the main body of RV cannot take the aerodynamic stresses. Only the 'tip' can.

I highly recommend again to study ballistic missile trajectories. By mere assumptions you cannot arrive at the logical answer.

At depressed trajectory and extremes of it such as DT-100 (Rising to just 100 Km instead of the full 300 in case of S-2 and 690 km in case of S-3) or DT-60 , ballistic trajectory can be flattened enough to cut down times to hit target at the expense of missile needing fat more energy and extra roll maneuvers and deteriorated accuracy.
Same as a Tridet with full carbon fiber body a shaheen with metal body cannot do DT-60 but theoretically can do DT-100.

 

[Mrc]

2100km in a straight line at constant Mach 15. Please see the following image.

Excellent image....

But depicts normal ballistic tractory...
What if lines are moved to left ... more height less distance time will reduce according to this graph ...also return is a larger mach number also factor that in