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Old 06-08-2019, 10:06 PM   #16
gus3
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Actually, slack in the treads helps the driver to steer. As a tank turns, the outer tread has to reach farther per step than the inner tread. Having slack in the treads makes it feasible.

So maybe "more slack" translates to "more speed in tight turns".
 
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Old 06-10-2019, 11:07 AM   #17
longtimeslacker
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https://www.goodreads.com/en/book/sh...ying_for_Slack

https://www.amazon.com/Praying-Slack.../dp/B001PIHU4A


In one of the comments:

"Praying for Slack: A Marine Corps Tank Commander in Vietnam contains gripping and highly-readable accounts of close combat with NVA regulars in the Eye Corps region of South Vietnam. Peavey shows the strengths and often surprising limitations of tank tactics and weapons in an unconventional war. For readers interested in an NCO's view of the war after Tet in '68, this is a good selection. It earned Four Stars from me."
 
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Old 06-10-2019, 03:28 PM   #18
Richard Cranium
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Quote:
Originally Posted by gus3 View Post
Actually, slack in the treads helps the driver to steer. As a tank turns, the outer tread has to reach farther per step than the inner tread. Having slack in the treads makes it feasible.

So maybe "more slack" translates to "more speed in tight turns".
Excessive slack in the tread allows thrown track, which converts your mobile tank into an immobile pillbox that's sticking out of the ground.

I'm not sure what you mean by "inner" and "outer" tread, especially on those tank models. There's a left and right track which are made of rigid track blocks. The track itself can be viewed as a portable road that is put down and picked up; the track itself shouldn't move from where it first strikes the ground until it is picked up on the back end.

(19A, M60A1, M60A3TTS for those who recognize such magic codes. Let's just say that I was responsible for 5 of those things back in the day.)

Last edited by Richard Cranium; 06-10-2019 at 09:13 PM. Reason: Left out the word "is".
 
Old 06-10-2019, 09:13 PM   #19
gus3
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In the context of a vehicle turn, the "inner" is the side on the direction of the turn. So, turning right, the right side moves more slowly, since it's moving along a shorter turn radius; the left side moves more quickly, on a longer radius, so it's the "outer" wheel. That's what I meant, although maybe there are more technical terms that I'm not aware of. (I'm trying to imagine a tank, not a car or truck. I don't know any car that can turn in-place.)

In any case, I bow to your superior knowledge and training.
 
Old 06-10-2019, 10:32 PM   #20
Richard Cranium
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Cracks knuckles. Cackles maniacally.

Well, tracked vehicles are rather odd.

There's a couple of ways a tracked vehicle can turn. I'll use US Army nomenclature, since that's what I'm used to using.

One way is the "neutral steer" (US Army) or "pivot steer" (as some other militaries name it). When you decide to turn in a given direction, the left and right tracks rotate in opposite directions. Pivot steer to the right means the left track moves as if the vehicle was moving forward while the right track moves as if the vehicle was moving backwards. Pivot steer to the left reverses the two (left track moves as if the vehicle was moving backwards, right track moves as if the vehicle was moving forward).

That puts a rather large lateral stress on the track which tends to pop the track off the road wheels. US tanks won't do such a turn unless the vehicle is stationary. (I've been out of the business for a generation, so I cannot state if other countries' vehicles are able to do such a thing on the move.)

The other way (which doesn't merit a name that I can remember) locks the track (there's no movement) on the side where you want to turn. So, if you want to turn to the left, the left track locks and the right track continues to move forwards. You won't be surprised to find out that turning to the right locks the right track and leaves the left track driving forwards.

Any turn with a tracked vehicle (well, maybe not on ice) will create a lateral stresses on at least one side of the vehicle that will attempt to move the track from underneath the road wheels. Since the track is the road for those wheels (which are not powered on modern tanks but were able to be powered on most variants of a Christie suspension), such track movement will immobilize such a vehicle.

No, really, I'll shut up now unless there are specific questions.
 
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Old 06-11-2019, 01:05 AM   #21
greencedar
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I found this interesting comment on Robert Peavey's book, "Praying for Slack" that seems to be a fair interpretation of his meaning.

Quote:
In the American slang vocabulary, the term “slack” is generally taken to mean that one wants special consideration or a lessening of a burden, or to “take it easy” when a task demands the ultimate effort. In the military it usually refers to a desire to avoid an onerous task. While deployed to Vietnam, one of the author’s M48A3 tanks carried the legend “Pray For Slack” on its 90mm gun tube, thus the title of his memoirs.
Here is the link to the quote:

http://www.missing-lynx.com/reviews/..._fdesisto.html
 
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Old 06-11-2019, 04:44 AM   #22
gus3
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@Richard Cranium: M60A3TTS? I found a majestic quote that sums it up, in combat, and in life:

"Oh, whatever. Come on! COME ON! Screw you, get on over here!"

Which perfectly sums up my restaurant kitchen life yesterday, as I dragged the mop bucket to&fro.
 
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Old 06-11-2019, 12:27 PM   #23
Richard Cranium
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Quote:
Originally Posted by gus3 View Post
@Richard Cranium: M60A3TTS?
https://en.wikipedia.org/wiki/M60_Patton#M60A3_series It was the model with the Tank Thermal Sight; you could see field mice popping their heads up in the field to look around when it was pitch black.
 
Old 06-11-2019, 05:15 PM   #24
justwantin
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With reference to Joe Biden in an online CNN editorial
Quote:
Biden botched his response to concerns about his touchy-feely habits and even some Republicans said everyone should cut him some slack.
The author was Michael D'Antonio, born 1955, perhaps the use of slack is a generational thing except amongst Slackware users and adherents to the Church of SubGenius
 
  


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