HisSoldier
New member
One odd thing I've often wondered about is twisted wire springs. What are the engineering advantages to the SKS recoil springs? I don't think I've ever seen them in guns made in the West.
Thanks
Thanks
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Combloc springs
- Thread starter HisSoldier
- Start date
HisSoldier
New member
Thanks Scorch.
HisSoldier
New member
I spent about an hour researching this, and the problem with using Google is often that of finding the correct key word. Evidently the correct key words are "stranded wire springs".
From http://www.eng-tips.com/viewthread.cfm?qid=94102&page=7
"The commom use for starnded (sic) wire springs is for helical springs. Where the springs are designed where the helix of the strand is in the opposite direction of the helix of the spring. When the spring is compressed the strand is subjected to a twisting moment which causes the wires in the strand to forcefully stick to each other thereby creating a friction effect that adds a damping property to the spring. This is why it is popular where high velocity displacements are required such as in the return mechanism of fire arms."
What an interesting spring design. I only found one other mention of the type, and it mentioned high velocity compression. What is "stacking"?
From http://www.eng-tips.com/viewthread.cfm?qid=94102&page=7
"The commom use for starnded (sic) wire springs is for helical springs. Where the springs are designed where the helix of the strand is in the opposite direction of the helix of the spring. When the spring is compressed the strand is subjected to a twisting moment which causes the wires in the strand to forcefully stick to each other thereby creating a friction effect that adds a damping property to the spring. This is why it is popular where high velocity displacements are required such as in the return mechanism of fire arms."
What an interesting spring design. I only found one other mention of the type, and it mentioned high velocity compression. What is "stacking"?
Stacking= as you compress the spring, load needed to further compress the spring increases. For example- recoil springs- 19 lbs per inch of compression, but as they are compressed the pressure required increases. Not much of an issue for handguns (short stroke), but for rifles (longer stroke) it can make a difference.
Dfariswheel
New member
Probably the real reason the commies used twisted wire springs are typical commie "belt and suspenders" engineering.
They figured that there might be quality problems with wire or a spring might loose tension or break.
A double spring is simply one more layer of insuring reliable operation.
In the West, we had higher quality standards and better repair systems and figured a standard spring would be good to go.
They figured that there might be quality problems with wire or a spring might loose tension or break.
A double spring is simply one more layer of insuring reliable operation.
In the West, we had higher quality standards and better repair systems and figured a standard spring would be good to go.
DWARREN123
New member
Usually done to longer springs. The M-60 machine gun had a twisted wire recoil spring.
HisSoldier
New member
One thing I read that seems to fit well with full auto fire is "damping". I assume that operating springs are constantly effected by waves or harmonics during normal use, but in full auto fire those harmonics could converge at the wrong moment and spoil the cycle, damping would reduce that tendency. Anyway, that's another theory to toss in. If they use them in M-60's they must have a particular advantage in automatic weapons. The first time I saw one I thought "What a cheesy looking spring!"