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Author Topic: gun harmonization  (Read 2452 times)

Offline MiloMorai

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gun harmonization
« on: September 29, 2015, 09:34:57 AM »
Looking for the names of pilots, or units, who customized the harmonization/convergence of the guns of their fighter and the distance the harmonization/convergence was set at.

For example, Urban Drew set each pair of his guns for 3 different distances (inboard closer, outboard further).

Thanks in advance.
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Offline bustr

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Re: gun harmonization
« Reply #1 on: October 01, 2015, 06:12:08 AM »
Are you writing a WW2 book by any chance?
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This is like the old joke that voters are harsher to their beer brewer if he has an outage, than their politicians after raising their taxes. Death and taxes are certain but, fun and sex is only now.

Offline MiloMorai

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Re: gun harmonization
« Reply #2 on: October 01, 2015, 06:35:38 AM »
No book but am looking for example to show that a person is talking out his butt.
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Offline Scherf

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Re: gun harmonization
« Reply #3 on: October 01, 2015, 08:28:02 AM »
Which particular corner of the net features this butt-talkery? Haven't seen much recently.
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Offline jimbo71

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Re: gun harmonization
« Reply #4 on: October 01, 2015, 11:27:24 AM »
George Beurling had field crew dial his convergence back to 250 and had them replace tracer rounds with regular in his spitfire.
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Offline bustr

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Re: gun harmonization
« Reply #5 on: October 03, 2015, 04:08:38 PM »
How far out of his orifice is he ejecting BS. Err what kind of BS...... :O
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bustr - POTW 1st Wing


This is like the old joke that voters are harsher to their beer brewer if he has an outage, than their politicians after raising their taxes. Death and taxes are certain but, fun and sex is only now.

Offline Chalenge

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Re: gun harmonization
« Reply #6 on: October 03, 2015, 06:06:33 PM »
An author named Gambit goes into some lengthy discussion on testing and harmonization that VMF-214 did under Gregory Boyington. As a result of their testing the entire US Navy and Marine Corps adopted the same standard throughout the Pacific. I think Walsh noted that only a few well-known squadron leaders went outside of those standards afterwards and only on their aircraft.
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Offline bustr

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Re: gun harmonization
« Reply #7 on: October 08, 2015, 05:09:29 PM »
What do you want to bet this article at Wiki, which was added in the last few years, is "part of the problem". There is nothing wrong in the article, you just need to own all of the sources to verify the information and be conversant with it. But, it gives great forum ammunition for quick sound bites.

 https://en.wikipedia.org/wiki/Gun_harmonisation

I've been trying to find excerpts from the VMF-214 testing online. I bet it's an informative read. This link is to a NAVY article on bore sighting which was probably the source for causing VMF-214 to perform field testing. The patterns ended up being worthless even for bombers due to everything being worked out in an office on a slide rule. A validation of von Moltke, "No battle plan survives contact with the enemy".

http://www.researcheratlarge.com/Aircraft/1943PatternBoresighting/
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bustr - POTW 1st Wing


This is like the old joke that voters are harsher to their beer brewer if he has an outage, than their politicians after raising their taxes. Death and taxes are certain but, fun and sex is only now.

Offline Lucifer

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Re: gun harmonization
« Reply #8 on: October 10, 2015, 01:18:10 PM »
75% pilots changed tracers from 1/2 to 1/5-10, reason was tracers rounds ballistics are horrible.... :rolleyes:

Quote from: jimbo71 on October 01, 2015, 11:27:24 AM
George Beurling had field crew dial his convergence back to 250 and had them replace tracer rounds with regular in his spitfire.
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Offline USRanger

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Re: gun harmonization
« Reply #9 on: October 11, 2015, 02:43:26 PM »
This is off topic, but anyhooo, when I carried my M4/M203, I only used tracers for my last 2 rounds in my magazines to let me know it was time to swap it out for a fresh mag.  When I carried an m249 SAW, I used a tracer every 5th round, and tracers for my last 5 rounds on the belt to let me know it was time to reload.  I didn't really like tracers because in combat, they work both ways.  Better to trust your aim.

In AH, I use tracers on because I need em.  Those guys that don't have em on get a huge advantage of getting behind someone and lighting them up without the prey knowing what's going on and from what direction. :salute
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Offline 10thmd

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Re: gun harmonization
« Reply #10 on: October 12, 2015, 03:06:09 PM »
Ranger I had a couple of belts that where 4/5, 4 tracers 1 Ball.  :devil scared the crap out of them.
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Offline icepac

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Re: gun harmonization
« Reply #11 on: October 12, 2015, 06:35:10 PM »
If I carried the saw, I would use "the 5 tracers" in the middle of my load and stop on the last one, wait for the enemy to think I was reloading, and watch for movement.

Always a good thing to make the enemy think you are out or reloading......when you're not.
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Offline 10thmd

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Re: gun harmonization
« Reply #12 on: October 12, 2015, 06:50:30 PM »
We also used to "set up our reloading word for the day"  and use the incorrect word to get the same reaction from the enemy.
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Offline BuckShot

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Re: gun harmonization
« Reply #13 on: October 13, 2015, 06:27:05 AM »
Quote from: icepac on October 12, 2015, 06:35:10 PM
If I carried the saw, I would use "the 5 tracers" in the middle of my load and stop on the last one, wait for the enemy to think I was reloading, and watch for movement.

Always a good thing to make the enemy think you are out or reloading......when you're not.

In ww2, the M1 Garand guys would drop an empty en blok  M1 clip to make it "ting" to make the enemy think he was empty.
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Offline Oldman731

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Re: gun harmonization
« Reply #14 on: October 13, 2015, 02:55:45 PM »
Quote from: BuckShot on October 13, 2015, 06:27:05 AM
In ww2, the M1 Garand guys would drop an empty en blok  M1 clip to make it "ting" to make the enemy think he was empty.


I've never seen anything to confirm that "ting thing."  With the sound generated by any sort of battle, I'd be surprised if anyone could hear the sound the clip makes when it ejects.

- oldman
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