Guest Maj Millard Posted October 27, 2009 Share Posted October 27, 2009 Ok if it worked, would it be at full brightness ?? And years ago a Mirage did shoot itself down with it's own cannon round, as the round slowed (normal air resistance) the Mirage, travelling slightly above UL speed, caught up and injested the round resulting in loss of the aircraft. Link to comment Share on other sites More sharing options...
facthunter Posted October 27, 2009 Share Posted October 27, 2009 Can we try this? An aircraft travelling at 400mph, fires a bullet forward through a gun which statically has a muzzle velocity of 1200 mph , What is the actual speed of the bullet as it leaves the gun muzzle when fired in the situation above? Nev Link to comment Share on other sites More sharing options...
Guest Maj Millard Posted October 27, 2009 Share Posted October 27, 2009 relative to the gun muzzle its 1200 MPH. Relative to the ground it's 1600 mph..isn't it ? Link to comment Share on other sites More sharing options...
Ferris Posted October 27, 2009 Share Posted October 27, 2009 True story about the Mirage shooting itself down, although not quite the way it has been told here. The incident happened around 1979 - 80 at the Dutson bombing range. The Mirage pilot came in sub-sonic in a dive firing his cannons, then went supersonic, continuing the dive before pulling into a steep climb. When he went supersonic, the Mirage overtook his rounds and shot himself down while climbing out. The aircraft crashed into a swamp and is now buried in 20 - 30 feet of mud. The aircraft was never recovered because of the unexploded ordinance. The pilot ejected without serious injury. Link to comment Share on other sites More sharing options...
Powerin Posted October 27, 2009 Share Posted October 27, 2009 Ok if it worked, would it be at full brightness ?? It would be at full brightness, but I think the light waves would be squashed together from the doppler effect and blue-shifted higher up the electromagnetic spectrum. So somebody at the airport watching you would probably get a burst of x-rays or gamma radiation rather than see a beam of light. Peter Link to comment Share on other sites More sharing options...
flying dog Posted October 27, 2009 Share Posted October 27, 2009 This was done to death on Mythbusters. The plane can take off. (Sorry if that sounds like a wet blanket.) Link to comment Share on other sites More sharing options...
facthunter Posted October 27, 2009 Share Posted October 27, 2009 Bullet velocity. Kinetic energy is velocity squared. That is the clue. The total amount of energy remains the same. You cannot directly add (or subtract) velocities. Keep at it. It's straight physics and there is no trick. Sorry Maj and Destiny. I got caught away for quite a few hours, and couldn't get back to you. Nev Link to comment Share on other sites More sharing options...
ahlocks Posted October 27, 2009 Share Posted October 27, 2009 The object must have velocity and mass to have kinetic energy K = 0.5mv2 So, now that kinetic energy has been introduced and not just velocity, where are you leading Nev? ;) Link to comment Share on other sites More sharing options...
facthunter Posted October 28, 2009 Share Posted October 28, 2009 Enough . There is enough information there already. I didn't give you a formula for Kinetic energy merely pointed out that it is relates to velocity squared. I probably should have started a new thread, but the thread has wandered around somewhat. I am interested in peoples views. It's not a contest. Nev Link to comment Share on other sites More sharing options...
ahlocks Posted October 28, 2009 Share Posted October 28, 2009 relativity Nah, not a competition. Are we discussing the velocity or kinetic energy of the bullet and in relation to the aircraft or a stationary object? What if a tail gunner fired a round straight out the back? Would it have the KE to down a persuing aircraft or would it just drop on the head of an ASIC inspector walking around near the airfield gate? Curious minds..... Link to comment Share on other sites More sharing options...
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