Re: Message to Bertie.

bertietaylor <bertietaylor@myyahoo.com> wrote:

On Sat, 9 Nov 2024 3:54:15 +0000, Jim Pennino wrote:
 

bertietaylor <bertietaylor@myyahoo.com> wrote:

On Sat, 9 Nov 2024 0:41:01 +0000, bertietaylor wrote:
>

On Fri, 8 Nov 2024 21:29:06 +0000, Jim Pennino wrote:
>

bertietaylor <bertietaylor@myyahoo.com> wrote:

On Fri, 8 Nov 2024 16:02:42 +0000, Jim Pennino wrote:
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bertietaylor <bertietaylor@myyahoo.com> wrote:

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<snip old crap>
>

Fool, with the low voltage given and its huge mass the momentum of the
armature beats that of most high power rifle bullets.

>
Utter nonsense, crackpot.
>
Railguns don't have an armature, they fire projectiles through the air,
crackpot.

>
The projectile is the armature, of the linear motor that in this case is
the railgun, Penisnino, most extraordinary ignoramus.

>
The muzzle energy of the very common 7.62x51mm NATO cartridge is
typically around 3,346 J.

>
Weight of bullet is say 7g
Muzzle velocity is 300m/s
So ke is 0.5mv^2=0.5*.007*300^2=.0035*90000=3150J so okay

>
The muzzle energy of the very common 5.56x45mm NATO cartridge is
typically around 1756 J.
>
What is the muzzle energy of your low speed linear motor, crackpot?5

0.5*4000*1.5^2= 2000*2.25=4500J, Penisnino

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Sorry we made a mistake above, it should be
0.5 * 4 * 1.5^2 = 4.5 J and not 4500J.
>

which is greater than 3346J or 3150J or 1756J.

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We were wrong, but in Arindam's railgun design we do not talk of energy
except for efficiency we talk momentum.

>
Railguns, actually ALL guns, are ALWAYS specified in energy as that is
the important parameter and no one cares about momentum, crackpot.

 
Moron, ALL guns are specified in terms of *muzzle velocity*

Actually, it is the ammunition that is specified in terms of muzzle
velocity, crackpot.

<snip remaining babble>