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Posted: 2/1/2006 6:54:26 PM EDT
[#1]
how would wind resistance factor in?
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Posted: 2/1/2006 6:55:21 PM EDT
[#2]
good point, that is why im asking. questions get answered around here and i like it :)
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Posted: 2/1/2006 6:55:47 PM EDT
[#3]
 The muzzel velocity is relative to the environment it was fired from. So it would be the muzzel velocity of the gun/round plus the velocity of the firing a/c... Relative to the ground it would be moving at that much faster... How do you think the term "emparting energy" to missiles came about? Accelerating to supersonic speeds before firing a missile so the missile starts out moving faster before accelerating. |
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Posted: 2/1/2006 6:59:25 PM EDT
[#4]
yes but im guessing the target is moving at about the same speed as the laucher so it evens out I would guess there would be some increase on stationary targets or thats my story and im sticking to it |
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Posted: 2/1/2006 7:00:55 PM EDT
[#5]
+1 No offense guys but this is something you should have learned in high school physics . |
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Posted: 2/1/2006 7:01:25 PM EDT
[#6]
The Muzzle Velocity would be the Stationary Muzzle Velocity + the Velocity of the Air Craft.
As the Machine Gun is firing the Figther will slow down somewhat (due to Conservation of Momentum) The Projectiles speed will rapidly decay once it leaves the Muzzle. A Projectile when supersonic: its speed will decay linearly until it approaches the speed of sound, as it slows down past the sound barrier, the decay is no longer linear, but becomes quadratic. The Speed of Sound varies due to a Medium's density, its temperature and humidity. |
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Posted: 2/1/2006 7:11:53 PM EDT
[#7]
that why ya need friking lasers
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Posted: 2/1/2006 7:12:06 PM EDT
[#8]
The answer is yes. One reason that .50 cals were so effective in the ground attack role during WWII.
Air resistance (drag) does play a part in slowing the bullet, but the overall energy is certainly increased by the speed and altitude of the aircraft. |
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Posted: 2/1/2006 7:15:21 PM EDT
[#9]
Smart Dog! |
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Posted: 2/1/2006 7:15:36 PM EDT
[#10]
Yes, the MV of the projectile is added to the speed of the aircraft. |
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Posted: 2/1/2006 7:16:28 PM EDT
[#11]
I'm don't know physics in real life, but I play a physicist on the net......what was you're question again.
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Posted: 2/1/2006 7:31:56 PM EDT
[#12]
How about the old what if you shot backwards, into the direction you came from as opposed to going towards .
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Posted: 2/1/2006 8:13:23 PM EDT
[#13]
What about fighters that shoot airsoft?
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Posted: 2/2/2006 6:02:14 AM EDT
[#14]
You assume that high schools still teach physics. . . . |
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Posted: 2/2/2006 6:17:16 AM EDT
[#15]
The rule only applies to projectiles. Since the speed of light in a given medium is constant, there would be no additional KE in a laser fired from a moving aircraft. Regarding the original question, the KE would be higher, but the energy imparted to the target depends on the target's velocity as well. |
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Posted: 2/2/2006 6:22:03 AM EDT
[#16]
This reminds me of the discussion about whether the gun on an A-10 had enough recoil to stop the airplane in flight.
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Posted: 2/2/2006 6:44:58 AM EDT
[#17]
I think the B-58 Hustler had a prototype gatling gun in the tail, but it didn't work well and was discontinued.
Imagine if the B-58 was hauling ass at about 2900 fps, and the gun fired rearward also at about 2900 fps, wouldn't the bullets fall to the ground????? 2900forward -2900 rearward ------------- zero |
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Posted: 2/2/2006 7:04:44 AM EDT
[#18]
Physics? I know most of my numbers and letters but I just don't know them in order.
____________________________________________________________ A warriors greatest joy is to drive his enemies before him and slay them. Burn his fields and sack his villages, then gather his wives and daughters as his own. |
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Posted: 2/2/2006 7:15:12 AM EDT
[#19]
Ask the Lockheed Skunkworks guys. They tried to put MG's on the YF12A (the prototype SR-71).
The bird came home with bullets in it. So, in answer, yes, for a short period. Get going too fast, and you will overcome any benefits the projectile gains. |
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Posted: 2/2/2006 7:17:47 AM EDT
[#20]
If the A10 were going real slow, maybe, but there is probably a safety system that doesn't allow the gun to fire under a certain airspeed. The Harrier cannot fire any of it's weapon systems while in hover due to configuration of the landing gear system and the safties related to it. If the gear is down, it locks out the weapons. |
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Posted: 2/2/2006 7:37:24 AM EDT
[#21]
I did go to a public school. Do you really think I learned ANYTHING? |
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Posted: 2/2/2006 7:42:43 AM EDT
[#22]
Technically, the laser would be slightly "blue shifted" and have more energy due to the airplane's velocity. |
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Posted: 2/2/2006 7:55:08 AM EDT
[#23]
When your aircraft is going Mach 2, all of the objects attached to the aircraft is also going at Mach 2. So when you fire the 20mm cannon, the bullets have an initial velocity of Mach 2, starts to pick up speed from the powder ignition inside the chamber and bore, and starts to decelerate as soon as it leaves the barrel due to wind resistance, gravity, mass of bullet/frictional forces, etc... You also have to remember that Mach 2 for bullet projectiles isn't that significant. Mach 2 around sea level is only 2230 fps (55 gr M193 is around 3200-3400 fps sea level).
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Posted: 2/2/2006 8:06:27 AM EDT
[#24]
Culled from the web:
Tom Attridge flying F11F-1 138620 on September 21st, 1956. While in a (slightly) supersonic dive, he fired his 20mm guns. Seconds later, the accelerating aircraft had overtaken the shells one of which was ingested into the intake. |
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Posted: 2/2/2006 8:49:53 AM EDT
[#25]
What's a "muzzel?" And does it have a "break?" |
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