Com-Central.net

Dontos · Posted: Mon Mar 20, 2006 1:28 pm Post subject: Re: fume extractors-- questions?

- Joe_D

Could always tell who had a sticky one because the back was bashed in. Howz cum yoos got to bash yours???
Joe D

As an 'IP' tanker going into transition onto M1A1's,....

Always had to use the sledge on my ol' M1's & IPM1's, no matter how much lube is applied previously,.... so....

WHACK!!! Shocked

(uh oh,....Hey, wheres that 2404...? I got something else to write down...

)

Joe_D · Posted: Mon Mar 20, 2006 1:19 pm Post subject: Re: fume extractors-- questions?

Yeah,
Better hope you didn't have some hot aft caps on the floor when it did. High adventure then.
Never seen any official written rule about main gun fire requiring the engine on. The round about answer was the Tank was safety deadlined for main gun fire if the NBC main system was down. Never stopped me but I did use that deadline to get all my systems repaired in a timely manner.
Never had a problem getting a 120 evacuator off. Had a few 105's needing the old 10lb solution. They were on M60A1's on their last legs of life. Could always tell who had a sticky one because the back was bashed in. Howz cum yoos got to bash yours???

Joe D

Dontos · Posted: Mon Mar 20, 2006 12:46 pm Post subject: Re: fume extractors-- questions?

QUESTION TO JOE:

Ever use the sledge hammer on the 120 Bore evacuator? ( Mr. Green

)

ANSWER: ??? Shocked

(Me?....once!

)

Dontos · Posted: Mon Mar 20, 2006 12:40 pm Post subject: Re: fume extractors-- questions?

- Roy_A_Lingle

- Dontos

- Joe_D

Shawn,
With all that, aquestion for Dontos. Riddle me this, was it authorized on the M1A1/A2 to fire main gun with the engine off ???? War time doesn't count.
Joe D

NOPE!! ...do I have to explain?

For all us NON-M-1 tankers (the M1 was after my time), YES, YES, YES, YES you must explain!

If I could fire my M-139 20mm autocannon on a Lingle in full auto or single shot without any power, why cann't a M-1 do it?
Sgt, Scouts Out!

The NBC system which is required to overpressurize the tank, works off of the running engine.

There are a couple of other reasons I can think about but nothing 'official' that I can remember.

I had an 'old' IPM1 in Germany that would 'fire' the driver halon bottle if you ran the heater with the engine off. That was my first 'taste' of halon, during an 'alert'. We were in a tactical shutdown at the "LDA", awaiting upload. Laying on the front slope, talking to the driver,.....PSSSSSSS RIGHT IN THE FACE!!!. Shocked

(MMMM, MMMM Good!!) I was spitting Halon for a couple of days. Mr. Green

Joe, remember the early days of the 120? Unloading a HEAT round? HAHAHA... handing the loader thesash brush and a dust pan...

(to the loader)
JUST SCOOP IT UP Shocked

AND PUT IT BACK IN THE BREECH, THEN SHOVE THE AFT CAP BACK ON!!!! Shocked

"Tower, this is _____, request permission to fire chambered round...Could you pop a target?"

Bring back any memories?

Roy_A_Lingle · Posted: Mon Mar 20, 2006 11:51 am Post subject: Re: fume extractors-- questions?

- Dontos

- Joe_D

Shawn,
With all that, aquestion for Dontos. Riddle me this, was it authorized on the M1A1/A2 to fire main gun with the engine off ???? War time doesn't count.
Joe D

NOPE!! ...do I have to explain?

For all us NON-M-1 tankers (the M1 was after my time), YES, YES, YES, YES you must explain!

If I could fire my M-139 20mm autocannon on a Lingle in full auto or single shot without any power,

why cann't a M-1 do it?

Sgt, Scouts Out! Smile

Dontos · Posted: Mon Mar 20, 2006 11:31 am Post subject: Re: fume extractors-- questions?

- Joe_D

Shawn,
With all that, aquestion for Dontos. Riddle me this, was it authorized on the M1A1/A2 to fire main gun with the engine off ???? War time doesn't count.
Joe D

NOPE!! ...do I have to explain?

Joe_D · Posted: Mon Mar 20, 2006 3:46 am Post subject: Re: fume extractors-- questions?

Shawn,
Don't let Donto's cavalier attitude fool you, them fumes can get pretty bad when the evacuator doesn't work. Until the M1A1 came out that's all you had along with the turret blower. The blower would suck air in to the turret and force the fumes out, a lot of laymen think the opposite. With combustable casings the bore evacuator prevents flareback (IAW the "Book"). It's also all you have unless the NBC overpressure system is on, the blower was replaced by it. Any unburnt residue left in the chamber will flare up as soon as the gun goes back into battery opening the breech and ejecting the cartridge base giving it oxygen. The bore evacuator lowers the atmospheric pressure in the gun behind it. When the breech opens the higher pressure in the turret rushes in and expells the fumes and potential flare towards the end of the gun tube.
With all that, aquestion for Dontos. Riddle me this, was it authorized on the M1A1/A2 to fire main gun with the engine off ???? War time doesn't count.

Joe D

PS: WELCOME BACK Ole Top, I missed you too.

Dontos · Posted: Mon Mar 20, 2006 3:16 am Post subject: Re: fume extractors-- questions?

HA...you gotta 'catch up'. Many cool little things here. Cool

SHAWN · ***Power User*** Offline Joined: Jan 31, 2006 Posts: 484

okay, i am going to play really dumb on this on dontos, what else was the fume extractor designed for, as far as gun operation, etc.?

SHAWN · ***Power User*** Offline Joined: Jan 31, 2006 Posts: 484

hey dontos,

you seem to have many a "quirk" dont you...

you know, this new site seems pretty cool for AFVnews, i think i am liking it alot more than the older site, and i really enjoyed that site.
shawn

Dontos · Posted: Mon Mar 20, 2006 2:59 am Post subject: Re: fume extractors-- questions?

'Bore evacuators' are more nice but not designed as a purely 'creature comfort' with the crew inmind.

I used to love 'smoking' the fumes that filled the turret, when firing with hatches closed. (one of many little quirks, that I have been known for in the past...)

With the NBC system and overpressurization, there is really little fumes in the Abrams turret anymore.

Cracking hatches helps, but the turret fan or blower was designed to circulate or recirculate 'stale' air.

SHAWN · ***Power User*** Offline Joined: Jan 31, 2006 Posts: 484

i was just looking over some reading material and ran across some items on the fume extractor, etc. and it then seemed "modern" to me. almost taken for granted in large calibre evolution...

i have never really thought of it before and havent read much in particular to it, but it must have been even more "atmospheric" in many of the larger calibred tanks/SPs of WW2 (especially the russians, few of the germans) considering they had no fume extractors.
as if the creature comforts in the soviet vehicles werent exquisite already.
i can only think this must have been a big problem. glad i wasnt in the vehicle.
can anyone relate?
shawn

Com-Central.net

Select Language

Login

`±`Recent Visitors

`±`User Info-big

Com-Central.net

Select Language

Login

±Recent Visitors

±User Info-big

`±`Recent Visitors

`±`User Info-big