PFM-1 air, Russian air delivered dispenser mine

[pzgr40]

[FZG76]

An attachment : fuze

[spotter]

An attachment : fuze

Very nice, i like how this is presented

[pzgr40]

Thanks for the info. I like the display also; it makes it very clear how the PFM-1S works.
I also found out I made a mistake in the difference between the PFM-1 and the PFM-1S. The one I described is the PFM-1S , the PFM-1 has a different (much shorter) fuze. I will post the pictures showing the differences tonight.

Regards, DJH

[pzgr40]

A drawing clearly showing the difference between the PFM-1 (no self destruct mecanism) and the PFM-1S (with a self destruct mechanism).
So I had it wrong initially. The (self destruct) mechanism with the lower dash pot does not appear in any shape on the PFM-1, only on the PFM-1S.
Sorry for the inconvinience!
Regards, DJH

PS: ** I have also changed the name of the main posting from PFM-1 to PFM-1S**

[EODGUY]

Thought I would add a photo of a couple of the PFM-1's. Desert tan, forest green and OD. The OD one is the inert trainer with the "y" cut into the wing. Shown for size comparison is the US BLU-43 Dragonstooth submunition used during the Vietnam period. Does anyone have a white PFM? I know they were made, but have never sen one.

[FZG76]

Your wish is my reality!
The orange model had a dark liquid (Training)
Regards

[Sprockets]

Dear pzgr40,
Another "Tour de Force"! I will soon have nothing to think about on sleepless nights! A few observations.
A)- Could Popov have introduced the clever tilting primer, so that only a low order detonation would take place in the event of a fire, (Americans went for the "Aerex" binary explosive to provide for the primer cooking - off )? Were the plastic bodied units considered to be very vulnerable in the case of a fire?
B)-This device was notorious for requiring multiple operations to operate, in the non-delay form. Perhaps this was due to tight fits being used to stop leakage. Then, where the fits were too close, a pressure pulse would move the parts until they jammed. The fluid would then seep between the surfaces, allowing fresh movement at the next pressure impulse.
The Self Destruct version had to have free movement, so Popov provided a diaphragm to provide a seal, and relaxed the tolerance on fits.
C)-Your point about not allowing the silicone grease to mix with the explosive explains the two discs, closing the bottom chamber. The spring pressure on the top disc causes it to act as a one-way valve, preventing outflow of the silicone. However, as a negative pressure devloped with piston movement, due to the area of the piston rod, then fluid could enter the chamber. Do you agree?
D)- Finally, why was the Russian unit so much larger? It can't be due to inferior explosive, can it?

[pzgr40]

Hi,
A- I think this plastic is easily damaged by fire, so I suppose the PFM will burn up rather than detonate. In safe position there is no direct contact between the rotated firing cap (red) and the detonator (pink) , so in case of an accident it will not detonate.
B- still working on an awnser.
C- The fluid can enter the lower dash pot through the holes in flanges 22 and 23. Plate 23 is curved a bit so it does not lock off the hole in flange 22. The fluid creeps along the side slots in flange 23 into the hole in flange 22 when the piston moves forward.
D- Russians have a tendency to make their mines bigger than NATO types anyway. As a typical nato AP mine contains 25 to 50 grams of explosives , their russian counterparts mostly have 100 to 250 grams of explosive. They are meant to kill, not to blow off a foot

[25thapril]

Hello all a great cutaway once again pzgr40 thank you. Could someone please tell me what the liquid is that is in the training models? and can someone confirm that the training models have a solid base and the Y symbol cutout in the wing.
Regards Daryl