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Double Rifles, Single Shots & Combinations >> Double Rifles

LRF
.333 member


Reged: 28/03/11
Posts: 303
Loc: minnesota ,usa
Re: How not to shoot a double rifle
      05/11/20 04:42 AM

Quote:

.... When a rifle doubles, the recoil doesn't double, it quadruples. The recoil is related to the square of the recoil velocity, and when the velocity doubles, as with a double, then the recoil energy is four time as great.




I ran this past 2 senior mechanical design engineering from Honeywell who I worked with before I retired. They disagree. I copied exactly what was said and emailed it to them:

"Nope. I don't buy it at all.

It is true that that kinetic energy is 1/2mv^2.

You are not doubling the velocity simply because there are two projectiles, as is proposed down below, you are doubling the mass of the projectile (i.e. 2m), and both projectiles will be moving at the effectively the same velocity. So, the energy will be doubled."

and

"Conservation of energy. Each bullet has a specific, and in this case equal, amount of energy. The kinetic energy doubles from firing 2 bullets simultaneously. The kinetic energy of the gun in recoil doubles vs firing one bullet, so the velocity of the gun increases by the square root of 2 (1.414), not by 2.
Force acting on the rifle is equal to the force acting on the bullets and F=ma. Acceleration of each bullet is unchanged from firing each one separately or together, and each is equal. You have the mass of 2 bullets firing instead of one. So the force becomes F=ma+ma=2ma. So the force doubles and the recoil doubles.
Equivalently, force = change in momentum = mv/t. Here's another equation showing velocity. By firing 2 bullets simultaneously, F = mv/t + mv/t = 2mv/t. So the force doubles and the recoil doubles."

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Entire topic
Subject Posted by Posted on
* How not to shoot a double rifle NitroXAdministrator 03/11/20 03:34 AM
. * * Re: How not to shoot a double rifle DarylS   03/11/20 04:14 AM
. * * Re: How not to shoot a double rifle Ripp   03/11/20 04:29 AM
. * * Re: How not to shoot a double rifle DarylS   03/11/20 11:06 AM
. * * Re: How not to shoot a double rifle Marrakai   03/11/20 05:38 PM
. * * Re: How not to shoot a double rifle xausa   03/11/20 09:53 PM
. * * Re: How not to shoot a double rifle LRF   05/11/20 04:42 AM
. * * Re: How not to shoot a double rifle xausa   06/11/20 12:55 AM
. * * Re: How not to shoot a double rifle 85lc   06/11/20 04:09 AM
. * * Re: How not to shoot a double rifle Mike_Bailey   08/11/20 08:38 PM
. * * Re: How not to shoot a double rifle vykkagur   05/11/20 09:34 AM
. * * Re: How not to shoot a double rifle NitroXAdministrator   05/11/20 10:31 AM
. * * Re: How not to shoot a double rifle LRF   05/11/20 01:50 PM
. * * Re: How not to shoot a double rifle NitroXAdministrator   08/11/20 10:52 PM
. * * Re: How not to shoot a double rifle 3DogMike   09/11/20 01:24 AM
. * * Re: How not to shoot a double rifle mauserand9mm   13/11/20 08:37 PM
. * * Re: How not to shoot a double rifle grandveneur   13/11/20 10:58 PM
. * * Re: How not to shoot a double rifle ducmarc   14/11/20 11:55 AM
. * * Re: How not to shoot a double rifle ducmarc   14/11/20 12:01 PM
. * * Re: How not to shoot a double rifle Gankai   21/11/20 03:50 PM
. * * Re: How not to shoot a double rifle NitroXAdministrator   21/11/20 08:09 PM
. * * Re: How not to shoot a double rifle BigBoomer   16/11/20 03:11 PM
. * * Re: How not to shoot a double rifle NitroXAdministrator   14/11/20 01:43 PM
. * * Re: How not to shoot a double rifle DarylS   14/11/20 12:13 PM
. * * Re: How not to shoot a double rifle NitroXAdministrator   05/11/20 04:11 PM
. * * Re: How not to shoot a double rifle DarylS   05/11/20 10:29 AM
. * * Re: How not to shoot a double rifle Postman   04/11/20 12:16 AM
. * * Re: How not to shoot a double rifle 3DogMike   03/11/20 05:15 AM
. * * Re: How not to shoot a double rifle 85lc   03/11/20 09:03 AM
. * * Re: How not to shoot a double rifle 500Boswell   03/11/20 10:59 AM

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