±Recent Visitors

Recent Visitors to Com-Central!

±User Info-big


Welcome Anonymous

Nickname
Password

Membership:
Latest: DIEGO38
New Today: 0
New Yesterday: 0
Overall: 6597

People Online:
Members: 0
Visitors: 115
Total: 115
Who Is Where:
 Visitors:
01: Community Forums
02: Community Forums
03: Community Forums
04: Community Forums
05: Photo Gallery
06: Community Forums
07: Community Forums
08: Community Forums
09: Community Forums
10: Community Forums
11: Photo Gallery
12: Community Forums
13: Photo Gallery
14: Community Forums
15: Community Forums
16: Photo Gallery
17: Community Forums
18: Community Forums
19: Community Forums
20: Community Forums
21: Photo Gallery
22: Photo Gallery
23: Community Forums
24: Community Forums
25: Community Forums
26: Community Forums
27: Community Forums
28: Community Forums
29: Community Forums
30: Community Forums
31: Community Forums
32: Community Forums
33: Community Forums
34: Community Forums
35: Community Forums
36: Community Forums
37: Community Forums
38: Home
39: Community Forums
40: Community Forums
41: Community Forums
42: Photo Gallery
43: Photo Gallery
44: Photo Gallery
45: Home
46: Community Forums
47: Photo Gallery
48: Photo Gallery
49: Community Forums
50: Home
51: Community Forums
52: Community Forums
53: Community Forums
54: Community Forums
55: Community Forums
56: Community Forums
57: Community Forums
58: Community Forums
59: Photo Gallery
60: Community Forums
61: Community Forums
62: Community Forums
63: Downloads
64: Community Forums
65: Community Forums
66: Community Forums
67: Community Forums
68: Photo Gallery
69: Community Forums
70: Photo Gallery
71: Home
72: Photo Gallery
73: Community Forums
74: Community Forums
75: Community Forums
76: Community Forums
77: Community Forums
78: Community Forums
79: Community Forums
80: Photo Gallery
81: Photo Gallery
82: Community Forums
83: Community Forums
84: Community Forums
85: Home
86: Community Forums
87: Community Forums
88: Community Forums
89: Community Forums
90: Community Forums
91: Community Forums
92: Community Forums
93: Community Forums
94: Community Forums
95: Home
96: Community Forums
97: Community Forums
98: Community Forums
99: Community Forums
100: Photo Gallery
101: Community Forums
102: Community Forums
103: Photo Gallery
104: Community Forums
105: Photo Gallery
106: Statistics
107: Community Forums
108: Community Forums
109: Community Forums
110: Community Forums
111: Photo Gallery
112: Community Forums
113: Photo Gallery
114: Community Forums
115: Home

Staff Online:

No staff members are online!
Bore inspection?
The AFV ASSOCIATION was formed in 1964 to support the thoughts and research of all those interested in Armored Fighting Vehicles and related topics, such as AFV drawings. The emphasis has always been on sharing information and communicating with other members of similar interests; e.g. German armor, Japanese AFVs, or whatever.
Go to page 1, 2  Next
Post new topic    Reply to topic    Printer Friendly Page     Forum Index ›  AFV News Discussion Board

View previous topic :: View next topic  
Author Message
blair
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 87

PostPosted: Wed Mar 07, 2007 3:50 am
Post subject: Bore inspection?

Whats this guy doing?

www.dodmedia.osd.mil/A...06814.JPEG
Back to top
View user's profile
Sabot
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 380
Location: Kentucky
PostPosted: Wed Mar 07, 2007 4:00 am
Post subject: Re: Bore inspection?

Bore sighting. He looks through a little in-bore device to align the center of the physical gun tube on a boresight panel 1200m down range.

He then uses hand and finger signals to inform the gunner which way to manually move the turret/gun until the crosshairs are at a certain spot on the boresight panel.

The gunner then adjusts his sights until his reticle (crosshairs) are at the exact same spot as the bore sight device.

The old 105mm bore sight device was called the Pye-Watson, the 120mm was an M26E or something along those lines, but many still called it the Pye-Watson.

There's a similar device for the .50 cal called the Anderson Device. It is used to make sure the commander's .50 sight is aligned as well.

There's normally a long red flag attached that is just like an aircraft's "REMOVE BEFORE FLIGHT" tag except it says "REMOVE BEFORE FIRING". There have been several incidents where the crew forgets to remove the Pye-Watson and sends it down range, normally with part of the gun tube and MRS.

_________________
RobG
Back to top
View user's profile AIM Address
Jens_O_Mehner
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 511
Location: Giessen, Germany
PostPosted: Wed Mar 07, 2007 4:51 am
Post subject: Re: Bore inspection?

Naaww,

that's Jeff checking if there is any rifling left downtube on that peculiar M60... Laughing

Cheers,

Jens O.
Back to top
View user's profile
Dontos
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 3436
Location: Vine Grove, KY
PostPosted: Wed Mar 07, 2007 6:07 am
Post subject: Re: Bore inspection?

Here's a personal shot, I took during M1A1 transition (in Germany 1988)



Don
Back to top
View user's profile Send e-mail Visit poster's website AIM Address Yahoo Messenger Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 22, 2006
Posts: 4632
Location: The Great Satan
PostPosted: Wed Mar 07, 2007 6:23 am
Post subject: Re: Bore inspection?

'Well, when we used to boresight, we'd used to get oop at 5 o'clock, four hours before the sun went down, then go down to the range and tape two bits o' string across the end o' the moozle and peer through the breech wit' a pair o' binoculars through a ring-shaped deviced centered on the chambere and sight on a distant right angle...say, a patient window at Ireland Army Hospital at Ft. Knox."

"Aye, aye"....

"Now, you try and tell the young people that today....they won't bloody believe ya',"

Back to top
View user's profile Visit poster's website Photo Gallery
bsmart
Power User

Offline Offline
Joined: Jan 22, 2006
Posts: 2516
Location: Central Maryland
PostPosted: Wed Mar 07, 2007 8:13 am
Post subject: Re: Bore inspection?

You must have been part of the new mekinized army. back in the old days we'd pull a hair from the drag horse on the team and use chawin tabac to hold it in placein the notches on the muzzle

_________________
Bob Smart ([email protected])
Back to top
View user's profile Send e-mail
palic
Power User

Offline Offline
Joined: Mar 02, 2006
Posts: 172

PostPosted: Wed Mar 07, 2007 1:19 pm
Post subject: Re: Bore inspection?

- bsmart
You must have been part of the new mekinized army. back in the old days we'd pull a hair from the drag horse on the team and use chawin tabac to hold it in placein the notches on the muzzle


Yap, definitely that is the way we used to "zero-in" the armament of BMP-1 or BPzV Svatava. Instead "chawin tabac" we used small pieces of magnet, instead "a hair from the drag horse" we used thread ...
There was a metal "diopter" piece – typical shape of German "potato masher" stick grenade to be inserted into gun chamber.... Optic device "L" had to be inserted into the PKT MG muzzle - with red flaggie too.

I did it many, many times before live fire trg as a guy responsible for...everything
Back to top
View user's profile
Dontos
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 3436
Location: Vine Grove, KY
PostPosted: Wed Mar 07, 2007 4:16 pm
Post subject: Re: Bore inspection?

Here I am, making the 'boresight face', but using a modified 'bail-out' cord, so I can talk to my gunner thru the intercom. No 'gang sign' directions,.....precision boresighting thru positive communication.



Notice my Boresight instructions on front slope,.....I'm doing final comfirmation following completion of the proceedure.

BTW: The string method is for dinosaurs. The 105mm MBD was the 'Pye-Watson'. The 120mm is known as the 'Lensar'(sp?).

Don

_________________
"Gonna hold my breath until Armor returns home..."
Back to top
View user's profile Send e-mail Visit poster's website AIM Address Yahoo Messenger Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 22, 2006
Posts: 4632
Location: The Great Satan
PostPosted: Wed Mar 07, 2007 4:18 pm
Post subject: Re: Bore inspection?

- Dontos

BTW: The string method is for dinosaurs. Don
Shocked

Now just a gol-durn minute there....that's curmudgeons to you, Buddy! Evil or Very Mad

...and for thems that, by some cruel twist of fate don't recognize the "Four Yorkshiremen", here's the reference:

www.youtube.com/watch?v=Xe1a1wHxTyo



Laughing
Back to top
View user's profile Visit poster's website Photo Gallery
Buq-Buq
Power User

Offline Offline
Joined: Mar 03, 2006
Posts: 84

PostPosted: Wed Mar 07, 2007 6:40 pm
Post subject: Re: Bore inspection?

Mr. Kibbey, I have to say that you capped my night.

"I laughed until I stopped."

All them yoooung peeeople . . .

HA!



Mark
Back to top
View user's profile
Sabot
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 380
Location: Kentucky
PostPosted: Thu Mar 08, 2007 3:56 am
Post subject: Re: Bore inspection?

My first gunnery was in 1985 on M48A5s. Even then we were only using Pye-Watsons, although we were informed of the old string method as field expediant.

_________________
RobG
Back to top
View user's profile AIM Address
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 22, 2006
Posts: 4632
Location: The Great Satan
PostPosted: Thu Mar 08, 2007 5:03 am
Post subject: Re: Bore inspection?

- Sabot
....we were informed of the old string method as field expediant.


Well, that sounds better than the Jurassic reference! I think.

As of the '70's (or maybe even the '80's, I don't know when the fancy-schmancy optical thingy's were introduced) what y'all are quaintly calling the "old string method" was not "field expedient" it was simply "THE boresight procedure" and the only known way it way it was done. There were a couple of variations of sighting down the chamber from the inside. One involved removing the firing pin mechanism from 90mm's (I believe) and there was also a round template thingy with a female receptacle that could receive the objective end of one side of a binocular that you could stick in the open breech (better method, less squinting) and both had the advantage of letting you just speak to the gunner so he could lay the crosshairs of the string on the selected right angle.

Then the gunner aligns the reticle and you have your rough sights set and you're ready to go to the range and bust some caps for zero.

Joe D. and Rob can clean up an details I've managed to screw up....
Back to top
View user's profile Visit poster's website Photo Gallery
Dontos
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 3436
Location: Vine Grove, KY
PostPosted: Thu Mar 08, 2007 3:38 pm
Post subject: Re: Bore inspection?

- Doug_Kibbey
- Sabot
....we were informed of the old string method as field expediant.


Well, that sounds better than the Jurassic reference! I think.

As of the '70's (or maybe even the '80's, I don't know when the fancy-schmancy optical thingy's were introduced) what y'all are quaintly calling the "old string method" was not "field expedient" it was simply "THE boresight procedure" and the only known way it way it was done. There were a couple of variations of sighting down the chamber from the inside. One involved removing the firing pin mechanism from 90mm's (I believe) and there was also a round template thingy with a female receptacle that could receive the objective end of one side of a binocular that you could stick in the open breech (better method, less squinting) and both had the advantage of letting you just speak to the gunner so he could lay the crosshairs of the string on the selected right angle.

Then the gunner aligns the reticle and you have your rough sights set and you're ready to go to the range and bust some caps for zero.

Joe D. and Rob can clean up an details I've managed to screw up....


Although I may have stomped on some toes, ( Laughing Laughing Laughing ) I do know the 'string method', and have used it on a couple of occasions. The 'witness marks' on on end of the gun tube ( at 12 & 6 and 3 & 9 o'clock positions ) are the alignment marks for the string.

With the breech closed & the firing pin (firing probe on 120mm breech), use one side of binos (looking thru the firing pic 'hold') and direct the gunner to manually adjust the bore to the desired right angle. Then align the electronic / manual sights. THERE,.....see I know how to do it.

Regards ( "Jedi-Tanker" Mr. Green of CDAT "Computerized, Dumba** Tanker" Cool )
Don
Back to top
View user's profile Send e-mail Visit poster's website AIM Address Yahoo Messenger Photo Gallery
SFC_Jeff_Button
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 1311
Location: Ft Hood, TX
PostPosted: Thu Mar 08, 2007 5:55 pm
Post subject: Re: Bore inspection?

I saw that M48A5's and M60's used Pye-Watsons according to previous posts. I'm assuming that these two M60 barrels had these "tick-marks" at 12, 3, 6, and 9 o-clock for back-up, field expediant, string cross hair markings. Were the strings just simply attached with 100mph tape?


_________________
SFC Jeff Button "High Angle Hell"
Back to top
View user's profile Send e-mail Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 22, 2006
Posts: 4632
Location: The Great Satan
PostPosted: Thu Mar 08, 2007 6:10 pm
Post subject: Re: Bore inspection?

- SFC_Jeff_Button
I saw that M48A5's and M60's used Pye-Watsons according to previous posts. I'm assuming that these two M60 barrels had these "tick-marks" at 12, 3, 6, and 9 o-clock for back-up, field expediant, string cross hair markings. Were the strings just simply attached with 100mph tape?


Jeff,

Yep, or spit (if using thread) , or gum, or tied on with another piece of string around the circumference...whatever. Just so's you get the crosshairs where they needs ta' be. Pre-Pye-Watson or what-have-you, this was not the "backup method", but the PRIMARY method (for a certain category of tanker known pejoratively to certain callous, insensitive Jedi-Tankers as "dinosaurs") Laughing

D.
Back to top
View user's profile Visit poster's website Photo Gallery
Display posts from previous:   
Post new topic    Reply to topic    Printer Friendly Page    Forum Index ›  AFV News Discussion Board
Page 1 of 2
All times are GMT - 6 Hours
Go to page 1, 2  Next



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum