|
|
|
S |
M |
T |
W |
T |
F |
S |
|
|
|
|
1
|
2
|
3
|
4
|
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
|
26
|
27
|
28
|
29
|
30
|
31
|
|
|
|
0 members (),
479
guests, and
4
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums10
Topics39,502
Posts562,138
Members14,587
| |
Most Online9,918
Jul 28th, 2025
|
|
|
|
Joined: Feb 2002
Posts: 520
Sidelock
|
OP
Sidelock
Joined: Feb 2002
Posts: 520 |
Except that the crusher technology did not measure the entire area under the 'true' pressure curve, because the pressures below that required to achieve deformation were not measured at all, and as already alluded to, the peak pressures did not cause effect due to the brevity of the event and hysteresis of the mechanism.
|
|
|
|
|
Joined: Sep 2007
Posts: 504 Likes: 17
Sidelock
|
|
Sidelock
Joined: Sep 2007
Posts: 504 Likes: 17 |
Except that the crusher technology did not measure the entire area under the 'true' pressure curve, because the pressures below that required to achieve deformation were not measured at all, and as already alluded to, the peak pressures did not cause effect due to the brevity of the event and hysteresis of the mechanism. That's funny. "...brevity of the event and hysteresis of the mechanism." Seriously? Thanks for the giggle.
|
|
|
|
|
Joined: Jan 2002
Posts: 3,660 Likes: 7
Sidelock
|
|
Sidelock
Joined: Jan 2002
Posts: 3,660 Likes: 7 |
Being specific: a 95 model Mauser made in Germany (Loewe-Berlin) and properly re-chambered
for the 7.62NATO cartridge in very good condition.
JC
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
|
|
|
|
|
Joined: Jan 2002
Posts: 3,660 Likes: 7
Sidelock
|
|
Sidelock
Joined: Jan 2002
Posts: 3,660 Likes: 7 |
" brevity of the event and hysteresis of the mechanism"
Very clarifying and I cannot see it as funny. Am I missing something?
hysterisis: the phenomenon in which the value of a physical property lags behind changes in the effect causing it, as for instance when magnetic induction lags behind the magnetizing force.
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
|
|
|
|
|
Joined: Feb 2003
Posts: 4,109 Likes: 78
Sidelock
|
|
Sidelock
Joined: Feb 2003
Posts: 4,109 Likes: 78 |
Since deformation is correlated with peak pressure, how exactly can a crusher measure total area under the pressure curve?
I'm looking at an old Dupont handloader's guide.
Federal Game load hull
Federal 209
R12L
1 oz.
1295 fps
700X = 8600 LUP
PB = 6600 LUP
Clearly the work done is the same thus the area under the pressure curve should be the same.
I call BS on a crusher measuring the area under the pressure curve.
"The price of good shotgunnery is constant practice" - Fred Kimble
|
|
|
|
|
Joined: Dec 2001
Posts: 12,743
Sidelock
|
|
Sidelock
Joined: Dec 2001
Posts: 12,743 |
Seems to me that both systems are measuring the same thing, IE peak chamber pressure. the crusher method just has some inherent inaccuracies which the PE system avoids thus the different readings.
A German made model 95 mauser is a rather strong action regardless of what some may tell you. Pressures on US factory loaded 7x57 cartridges are kept low in deference to there still being a good number of both Remington rolling blocks & Spanish 93's around in that chambering. Yes the 93 & 95 are essentially of the same design,but the Spanish guns did not always use as good metallurgy as did the German built ones, om spanish guns were on the Soft side.
Miller/TN
I Didn't Say Everything I Said, Yogi Berra
|
|
|
|
|
Joined: Sep 2007
Posts: 504 Likes: 17
Sidelock
|
|
Sidelock
Joined: Sep 2007
Posts: 504 Likes: 17 |
Being specific: a 95 model Mauser made in Germany (Loewe-Berlin) and properly re-chambered
for the 7.62NATO cartridge in very good condition.
JC Is this one of the Chilean conversions?
|
|
|
|
|
Joined: Feb 2009
Posts: 7,710 Likes: 346
Sidelock
|
|
Sidelock
Joined: Feb 2009
Posts: 7,710 Likes: 346 |
I think rightfully there are more modern measurement methods, but a technique measuring metallic deformation seems like a good approach to predicting the effects on other metal objects.
|
|
|
|
|
Joined: Feb 2002
Posts: 520
Sidelock
|
|
OP
Sidelock
Joined: Feb 2002
Posts: 520 |
hysterisis: the phenomenon in which the value of a physical property lags behind changes in the effect causing it, as for instance when magnetic induction lags behind the magnetizing force.
And I think that's where power factor (electrical) comes from.
Last edited by Virginian; 10/29/14 11:11 PM.
|
|
|
|
|
Joined: Jan 2002
Posts: 3,660 Likes: 7
Sidelock
|
|
Sidelock
Joined: Jan 2002
Posts: 3,660 Likes: 7 |
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
|
|
|
|
|
|
|
