The most exciting portion of my career in engineering was the six months I spent working at Holloman in 1992-1993. At the time I was working on ejection seat projects and we were using the track fo our tests, but I also got to watch other testing going on. The highlight was a night-time firing of a three stage hypersonic sled. I enjoyed learning the history of the site and visiting some of the old launch sites and test stands scattered about the area.
Good idea. Thanks and congratulations on being the first in ten years to ask about that particular sound effect. We aim to be accurate and have lots of very cool classic sirens (and pretty much everything else) in our archives so there was plenty to choose from, but I went with an early 50s Civil Defense Air Raid unit (spun up by a massive Ford V-8). Duke Gildenberg affirmed it was the sort of apparatus they'd have used, but I really liked it for its lonely, evocative, deeply appropriate tone.
In the 60s they had a triangular shaped sled that guidance and other componants were placed to test Gs. I watched 2 runs that had some of my dads stuff on them. When you heard the rockets go;you turned your head as fast as possible and you MIGHT see a shadow go by. Seriously exciting for a kid.
Indiana Jones is one of my favorite film characters, but even though you're referring to the one and only scene I enjoyed in that sorry excuse for a sequel, I'm far from certain what historical artifact that jet-propelled contraption was supposed to represent. It definitely wasn't a rocket sled. On the other hand, Dr. Stapp never nuked a fridge.
It depends on what the bullet is shot out of. A .45acp shot out of a pistol will have a pretty low muzzle velocity, although I'm not sure it is that low.
@theknightlynews Craig did say that, specifying a .45 cal. for a reason, though I had to do a little background research myself before that comment made it into the film. Turns out the .45 cal. ACP cartridge was designed to have a fairly low muzzle velocity, in part due to the weight of the slug (it's the mass that does most of the damage) but also because a subsonic bullet is far easier to silence, given the lack of a sonic boom when the bullet leaves the barrel.
true with the original military spec for 45 acp (~850ft/sec), which is relatively uncommon these days. modern 45 acp is well over 600mph and closer to 700mph. stopping power is strongly desired especially by law enforcement, nobody wants weak rounds. suppression was not a design goal of 45 acp, it is merely a side benefit of being subsonic. it is one of the harder calibers to effectively suppress as it has one of the largest bores.
Наука
The most exciting portion of my career in engineering was the six months I spent working at Holloman in 1992-1993. At the time I was working on ejection seat projects and we were using the track fo our tests, but I also got to watch other testing going on. The highlight was a night-time firing of a three stage hypersonic sled. I enjoyed learning the history of the site and visiting some of the old launch sites and test stands scattered about the area.
Good idea. Thanks and congratulations on being the first in ten years to ask about that particular sound effect. We aim to be accurate and have lots of very cool classic sirens (and pretty much everything else) in our archives so there was plenty to choose from, but I went with an early 50s Civil Defense Air Raid unit (spun up by a massive Ford V-8). Duke Gildenberg affirmed it was the sort of apparatus they'd have used, but I really liked it for its lonely, evocative, deeply appropriate tone.
In the 60s they had a triangular shaped sled that guidance and other componants were placed to test Gs. I watched 2 runs that had some of my dads stuff on them. When you heard the rockets go;you turned your head as fast as possible and you MIGHT see a shadow go by. Seriously exciting for a kid.
John Paul Stapp is The Man!
Indiana Jones is one of my favorite film characters, but even though you're referring to the one and only scene I enjoyed in that sorry excuse for a sequel, I'm far from certain what historical artifact that jet-propelled contraption was supposed to represent. It definitely wasn't a rocket sled.
On the other hand, Dr. Stapp never nuked a fridge.
@sciencehighway-Thanks for this post. Pure undiluted courage from Col. John Stapp.
wow never heard about this guy!
It depends on what the bullet is shot out of. A .45acp shot out of a pistol will have a pretty low muzzle velocity, although I'm not sure it is that low.
@theknightlynews Craig did say that, specifying a .45 cal. for a reason, though I had to do a little background research myself before that comment made it into the film. Turns out the .45 cal. ACP cartridge was designed to have a fairly low muzzle velocity, in part due to the weight of the slug (it's the mass that does most of the damage) but also because a subsonic bullet is far easier to silence, given the lack of a sonic boom when the bullet leaves the barrel.
* ehem *
*_F A S T_*
J.P Stapp was a man's man, not too common in the USAF these days.
hes not the only one.. Indiana jones did it too.. and won a fist fight after^^
true with the original military spec for 45 acp (~850ft/sec), which is relatively uncommon these days.
modern 45 acp is well over 600mph and closer to 700mph. stopping power is strongly desired especially by law enforcement, nobody wants weak rounds.
suppression was not a design goal of 45 acp, it is merely a side benefit of being subsonic. it is one of the harder calibers to effectively suppress as it has one of the largest bores.
DId he say that 600 mph was faster than a 45 cal. bullet?
The Sirens used Chrysler Hemi's....
Really? I guess I'd been misinformed. Thanks.