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Kryssa Fordring
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Posted - 2006.11.30 21:04:00 -
[1]
Been seeing this a lot lately, missles "evaporate" before hitting a target that's within range.
Example: Level 2 "Avenge a Fallen Comrade"
My missle stats (lights) are 6.50 Flight Time, 5,850 Velocity. This gives me a maximum range of 38,025km. I always undercut by 2km to account for lag and target's movement.
Problem is, the target in this case was stationary (a habitat). I parked myself 34km away and went through three volleys of my 5 assault launchers and not one of them hit the structure. I didn't start making contact until I was 31km away.
A 7km deficit, especially on a stationary target seems pretty drastic.
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Dagis
United Knights Mining and Security
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Posted - 2006.11.30 23:53:00 -
[2]
lol i had a weird thing also, using rage torps (next to a target) they would just circle it then dissapear seconds later..
Was kinda fustrating :O
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Jimbob McKracken
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Posted - 2006.12.01 00:02:00 -
[3]
I believe you have to factor in acceleration into the equation - your missles take a certain amount of time to hit full velocity.
Unlike a gun, missles use a motor to propel themselves, whereas a gun is given velocity by gases expanding behind the round, or by electromagnatism in the case of railguns.
Their maximum velocity is hit at the end of the barrel.
Missles are held in a tube but the maximum velocity takes time to reach and is continued in space via the rocket motor.
I don't know if there is an equation somewhere in the forums for this, but it does make sense that the overall distance is lower due to the time taken to hit maximum velocity.
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Kryssa Fordring
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Posted - 2006.12.01 05:45:00 -
[4]
 Originally by: Jimbob McKracken
I believe you have to factor in acceleration into the equation - your missles take a certain amount of time to hit full velocity.
Unlike a gun, missles use a motor to propel themselves, whereas a gun is given velocity by gases expanding behind the round, or by electromagnatism in the case of railguns.
Their maximum velocity is hit at the end of the barrel.
Missles are held in a tube but the maximum velocity takes time to reach and is continued in space via the rocket motor.
I don't know if there is an equation somewhere in the forums for this, but it does make sense that the overall distance is lower due to the time taken to hit maximum velocity.
I understand what you're saying but I don't think that's what's happening in this case for three reasons:
1) I can shoot a rat at 5000m and the missle will overshoot, turn around and hit the rat
2) If my missle in fact hadn't reached full velocity, it should pass the structure as it continued to accelerate, not vanish a few meters in front of it
3) If you "set parent" on the structure and watch your missles approach, at around 5km their exhaust flares brighter which indicates to me that it's reached it's maximum thrust.
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Jimbob McKracken
Caldari
The Tidemark
Interstellar Alcohol Conglomerate
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Posted - 2007.02.20 20:30:00 -
[5]
Edited by: Jimbob McKracken on 20/02/2007 20:34:32
so at 5km they have hit maximum thrust - all the time they spent getting there they were doing less than maximum
For example lets take your figures and see if we can't make something of them.......
So your missle starts at 0 m/s and accelerates to 5850 m/s, and assuming your correct that it achieves this terminal velocity after covering 5000m, we can work out the average acceleration over the distance using the following formula:
distance = average velocity x time = (intial velocity + final velocity) x time/2
5000m = 2925 m/s x 1.709s = (0 m/s + 5850 m/s) x 1.709 / 2
The figure to look at is the average velocity field - over the first 5000m the missle is averaging only 2925 m/s.
So if you then recalculate the maximum range by doing the following.
Flight time - time to max velocity x max velocity + (average velocity x time to max) = maximum missle distance
6.5 - 1.709 x 5850 = 28080m + (2925 x 1.7 = 4972.5) = 33052.5 m or 33 km
this is also quite rough as it uses an average velocity over the 5km distance where it should really use some complex maths that would hurt my brain, it also assumes the acceleration to be linear.
Jimbob out
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sakana
Purgatorial Janitors Inc.
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Posted - 2007.02.20 21:55:00 -
[6]
Edited by: sakana on 20/02/2007 21:52:22
it'd make sense that its cause missiles have to accelerate up to max velocity, the first few seconds of its flight time it wont be going full speed.
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Dav Varan
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Posted - 2007.02.21 01:59:00 -
[7]
Did you use keep at range 34km ?
If not the problem may be that the client and server are out of sync
Your client shows you as being 34km away , but in reality you are 39km away.
This used to happen a lot a while back and was most annoying when trying to pick up cans. u would get to within 1,500m of a can ( pre wrecks ) and click open only to be told that you are xx.xxkm from the can and you are out of range.
it still happens to some extent , far less than it used to.
sometimes happens at acceleration gates as well when you get the button to go for it and are then told you are too far away.
Use keep at range or orbit and eventually the client and server will become more in sync.
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