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Breaking the sound barrier using only muscle power (Read 349 times)
Curious Aardvark
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Re: Breaking the sound barrier using only muscle power
Reply #15 - Aug 16th, 2019 at 7:40am
 
here's a thought that the recent bullwhip threads just inspired.

The tip of a bullwhipe breaks the speed of sound.
Could you fire something from the end of a whip ?

Not sure on the actual mechanism, but if you could, it'd be bloody fast !
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EtienneRousseau
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Re: Breaking the sound barrier using only muscle power
Reply #16 - Oct 4th, 2020 at 4:52am
 
I had the exact same idea a few months ago
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IronGoober
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Re: Breaking the sound barrier using only muscle power
Reply #17 - Oct 4th, 2020 at 8:17pm
 
Same. Been thinking about how you would release it consistently, or using an expendable release mechanism.
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John R.
 
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Re: Breaking the sound barrier using only muscle power
Reply #18 - Oct 5th, 2020 at 1:41am
 
Watching Destin's video on whips...https://www.youtube.com/watch?v=AnaASTBn_K4

Because the supersonic portion of the motion is just at the very end of the entire wave of the whip motion, when the portion of the whip right before the cracker starts to pull the cracker in tension,  this makes me think that you could just have a small bb on a string friction fit into place instead of the cracker. Like a tiny little press fit rod into the end of the whip.   So the projectile would just be the cracker, but instead would be essentially like a tiny "hammer" (like olympic hammer throw). 

The friction fit would likely be very finicky and need to be tuned well, because you'd want maximum energy transfer from the whip, so you wouldn't want it to slip out too early.

The other possibility would be just to make a tiny staff sling at the end of a whip.  I think this would rarely work, and would require a very specific type of whip and whip motion.

The whip would need to resist twisting, so it would likely have to be a flat, and a long isosceles triangle with the mini-staff sling at the end. From the video, it seems that the motion of an unrolling-type whip movement would get it to pull the staff sling in the right way to get it to release. The bb pouch would have to be very cupped.
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Sarosh
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Re: Breaking the sound barrier using only muscle power
Reply #19 - Oct 5th, 2020 at 2:52am
 
https://youtu.be/RVT5i4nhIGs?t=499

The trebuchet above is very much like a compound sling, transferring kinetic energy of a heavy body to a lighter body.
Right now I don't understand the energy and momentum transfer that happens on a whip and how it can be transferred to a segmented point mass whip like the compound sling.
watch at the video above.

in medieval mechanics I'd say:
"it's like higher mass absorbs more energy easier
while low mass cant absorb high amounts of energy"
that happens partly because of drag ,but even when we minimize it with lead I'm sure we will not see the energy transfer we see at higher masses. I wish he would do such an experiment.
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IronGoober
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Re: Breaking the sound barrier using only muscle power
Reply #20 - Oct 17th, 2020 at 2:48am
 
What about something like this? It would be for throwing a BB. It would be able to be reloaded.

The idea being to transfer most of the kinetic energy of the whip into a projectile at the end.
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John R.
 
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Re: Breaking the sound barrier using only muscle power
Reply #21 - Oct 17th, 2020 at 5:22am
 
Interesting. I can imagine that that would take a lot of adjusting and fine tuning but could throw pretty darn fast if you can get it releasing right.
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Re: Breaking the sound barrier using only muscle power
Reply #22 - Feb 1st, 2021 at 1:13pm
 
Whatever happened to the DREAD centrifugal machine gun?
https://armourersbench.com/2019/12/08/centrifugal-machine-guns/

Not a sling, but not a chemical/explosive launcher either.
Figure the gearing out to make a hand crank version to launch at or above SOS.
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