Formulas for recoil energy??

[BlindJustice]

Thanks 1911Tuner, hadn't considered the recoil spring's
movement/force against the frame as it compresses.

O.P. - Socalbeachbum
My Model 60 3" w/full underlug
W&E Adj. rear sight j/ black ramp front

Yeah, great gun, & accurate, I want to
get the Herretts Jordan Trooper grips for it.. so the
.357 Mag loads aren't so painful.'

I have plans to get a 3" Model 63 to go withit
I bought it for my grand daughter for her 18th B Day
so I only get to keep it for 10 or so more years heh

I'd still like to see a calculator with Barrel length
in the equation - seems like measuring it
over time is 'work' w/o it, you just have
an event - & compare 3" vs 5" or whatever

Randall

 

[rcmodel]

I'd still like to see a calculator with Barrel length
in the equation -

It is in the calculator I posted, or the formula others posted.

If you have a chronograph and measure the actual muzzle velocity of the bullet?
And not use the published velocity from the manufactures?

Barrel length is accounted for by the actual velocity number.

What cannot be accounted for is barrel weight, (IE: full under-lugs, pencil barrels, etc.)

That has a big effect in felt recoil and muzzle flip.
But there is no simple way to put it in the formula for recoil.

rc

 

[BlindJustice]

Input on the calculator rcmodel posted

Bullet Wt grins
Velocity FPS
Powder charge
Weight of the weapon Lbs

umh, where's the barrel length input

i.e with different barrel lengths
A. the powder charge would be different
to achieve equal velocity
B. Time to exit the muzzle will be greater
with the longer barrel gun and thus the
force of the recoil is present longer

of course the balance of the handgun
will have effect on 'felt' recoil, but
as 1911Tuner pointed out the recoil as
felt in a semi-auto and a revolver are different

I have a 1911 Full size Stianless
at 40 oz, and a full magazine is
about 9.6 oz

& a S&W 625 5" full underlug
45 oz empty & with 6 rds, let's
say 5.5 oz....

so they are withing an oz of each other in weight

and the Recoil calculator calculates
nearly the same nuberr in Impulse
firearm vlecoity and energy

I thin we'll all agree
They sure feel different

The calculator would be a good way to
quantify the difference in recoil given
the same Barrel length but
say compare

Revolver small/medium/large frame
all with a 4" bbl. and the same load.

Gives yah numbers to illustrate why lightweight
small frame guns kick more and how much

R-

 

[481]

Input on the calculator rcmodel posted

Bullet Wt grins
Velocity FPS
Powder charge
Weight of the weapon Lbs

umh, where's the barrel length input

The "barrel input" is this: Velocity FPS

Barrel length is what effects/produces the velocity of the bullet to be used in the calculator. By entering the velocity of the bullet, you are including the effect of the barrel's length upon the velocity of the bullet.

 

[murf]

there are a couple of good slow motion handgun videos at brassfetcher.com . after you watch the opening video (didn't know a glock frame would stretch like that), go to handguns to see the slow mo of a full size 1911. looks like a two-stage recoil on the full sized pistol.

murf

 

[BlindJustice]

Thanks, Murf

Yes, 2 stage

Stage 1 The barrel and slide are locked together
then as the slide and barrel unlock and the
recoil spring then becomes involed
there's the transition
Stage 2: Slide reaches furthest rearward movement
& Sthen it's over slide is moving forward and so on

 

[1911Tuner]

The barrel and slide are locked together
then as the slide and barrel unlock and the
recoil spring then becomes involed

The spring is involved the instant that the slide starts to move...which is the instant that the bullet starts to move. Stage One comes from the spring and its equal/opposite push on the slide and frame. Stage Two comes when the slide impacts the frame...then Stage One starts all over again as the spring pushes in opposite directions against the slide and frame.