±Recent Visitors

Recent Visitors to Com-Central!

±User Info-big


Welcome Anonymous

Nickname
Password

Membership:
Latest: HighestAce
New Today: 0
New Yesterday: 0
Overall: 6648

People Online:
Members: 0
Visitors: 257
Total: 257
Who Is Where:
 Visitors:
01: Home
02: Community Forums
03: Community Forums
04: Home
05: Home
06: Downloads
07: Community Forums
08: LinkToUs
09: Home
10: Home
11: Community Forums
12: Community Forums
13: Community Forums
14: Community Forums
15: Photo Gallery
16: Photo Gallery
17: Home
18: Downloads
19: Member Screenshots
20: Community Forums
21: Photo Gallery
22: Photo Gallery
23: Community Forums
24: Statistics
25: Home
26: Home
27: Community Forums
28: Home
29: Member Screenshots
30: Home
31: Community Forums
32: Home
33: Home
34: Community Forums
35: Home
36: Home
37: Community Forums
38: Home
39: Home
40: Home
41: Home
42: Home
43: Community Forums
44: Home
45: Community Forums
46: Home
47: Home
48: Community Forums
49: Downloads
50: Home
51: News Archive
52: Community Forums
53: Home
54: Home
55: Member Screenshots
56: Member Screenshots
57: Photo Gallery
58: Home
59: Photo Gallery
60: Community Forums
61: Home
62: Home
63: Downloads
64: Home
65: Community Forums
66: Community Forums
67: Home
68: Photo Gallery
69: Home
70: Member Screenshots
71: Home
72: Community Forums
73: Community Forums
74: Community Forums
75: Community Forums
76: Member Screenshots
77: Photo Gallery
78: Community Forums
79: Member Screenshots
80: Community Forums
81: Community Forums
82: Community Forums
83: Community Forums
84: Home
85: Home
86: Member Screenshots
87: Community Forums
88: Community Forums
89: Home
90: Home
91: Home
92: Home
93: Home
94: Community Forums
95: Community Forums
96: Photo Gallery
97: Photo Gallery
98: Community Forums
99: Member Screenshots
100: Home
101: Downloads
102: Home
103: Community Forums
104: Home
105: Community Forums
106: Community Forums
107: Community Forums
108: Photo Gallery
109: Member Screenshots
110: Community Forums
111: Community Forums
112: Downloads
113: News Archive
114: Home
115: Home
116: Downloads
117: Community Forums
118: Community Forums
119: Home
120: News Archive
121: Home
122: Community Forums
123: Community Forums
124: Home
125: Downloads
126: Community Forums
127: Home
128: Member Screenshots
129: Photo Gallery
130: Community Forums
131: Member Screenshots
132: Home
133: Community Forums
134: Community Forums
135: Community Forums
136: Member Screenshots
137: Community Forums
138: Community Forums
139: Home
140: News Archive
141: Member Screenshots
142: Home
143: Photo Gallery
144: Community Forums
145: Home
146: Home
147: Home
148: Community Forums
149: Community Forums
150: Home
151: Community Forums
152: Community Forums
153: Home
154: Community Forums
155: Community Forums
156: Photo Gallery
157: Community Forums
158: Member Screenshots
159: Community Forums
160: Downloads
161: Home
162: Home
163: Community Forums
164: Home
165: Home
166: Community Forums
167: Community Forums
168: Home
169: Community Forums
170: Community Forums
171: Community Forums
172: Community Forums
173: Home
174: Community Forums
175: Community Forums
176: Community Forums
177: Community Forums
178: Photo Gallery
179: Community Forums
180: Community Forums
181: Community Forums
182: Community Forums
183: Community Forums
184: Home
185: Statistics
186: Home
187: Home
188: Community Forums
189: Home
190: Home
191: Photo Gallery
192: Photo Gallery
193: Downloads
194: Home
195: Community Forums
196: Downloads
197: Community Forums
198: Home
199: Community Forums
200: Community Forums
201: Home
202: Community Forums
203: Member Screenshots
204: Community Forums
205: Home
206: Home
207: Member Screenshots
208: Downloads
209: Member Screenshots
210: Community Forums
211: Community Forums
212: Home
213: Home
214: Community Forums
215: Home
216: Community Forums
217: Home
218: Photo Gallery
219: Home
220: Home
221: Community Forums
222: Community Forums
223: Home
224: Home
225: Community Forums
226: Community Forums
227: Community Forums
228: Photo Gallery
229: Home
230: Community Forums
231: Home
232: Community Forums
233: Home
234: Photo Gallery
235: Photo Gallery
236: Photo Gallery
237: Member Screenshots
238: Photo Gallery
239: Community Forums
240: Home
241: Home
242: Home
243: Photo Gallery
244: Community Forums
245: Community Forums
246: Home
247: Home
248: Statistics
249: Community Forums
250: Photo Gallery
251: Home
252: Community Forums
253: Community Forums
254: Home
255: Community Forums
256: Community Forums
257: Community Forums

Staff Online:

No staff members are online!
M551 Conduct of Fire Training Video (1969)
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.
Post new topic    Reply to topic    Printer Friendly Page     Forum Index ›  AFV News Discussion Board

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

Offline Offline
Joined: Apr 08, 2006
Posts: 2054
Location: Beatty, Nevada
PostPosted: Tue Nov 30, 2010 6:00 pm
Post subject: M551 Conduct of Fire Training Video (1969)

www.youtube.com/watch?v=DwtP188z9ZQ

_________________
"TUMBLEWEED"
Back to top
View user's profile Send e-mail Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Tue Nov 30, 2010 8:54 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

EXACTLY as I was trained (though they are a little casual and slow about the commands, no doubt for training purposes, as they are using voiceovers). Especially notable and different from any MBT was the action of the TC when firing main gun. In MBT, he was to be looking through binocs to spot for gunner and help apply burst-on-target. In the Sheridan, the drill was for the TC to grasp the spade grips on the locked-down .50 and hold on (for very good reason!). Laughing
Back to top
View user's profile Visit poster's website Photo Gallery
JeffStringer
Power User

Offline Offline
Joined: Jan 24, 2006
Posts: 637

PostPosted: Tue Nov 30, 2010 8:58 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

That's a gem of a video! Mr. Green


- Jeff
Back to top
View user's profile
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Tue Nov 30, 2010 11:14 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

Notice the film is dated 1969 and they are using HEAT to engage bunkers. I suggest that this is why we see it in the other M551 thread, HE-T was not yet available in quantity.

www.com-central.net/in...ic&t=13629
Back to top
View user's profile Visit poster's website Photo Gallery
MarkHolloway
Power User

Offline Offline
Joined: Apr 08, 2006
Posts: 2054
Location: Beatty, Nevada
PostPosted: Wed Dec 01, 2010 2:32 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

I guess you guys didn't notice but if you listen to the sound of the tank in the video you will hear the soundtrack of an M60. Quite different from those old whining 6V53T's. A mistake that only an old Sheridan loader would notice was when they showed the 'safe-to-fire' indicator it was out of range (low gun mount pressure). The other thing I noticed was when the TC gave a coax fire command the first thing the gunner did was turn on the turret power. This should already have been on!!! This would delay your engagement time by about 20 seconds. But I loved the video anyway Smile

_________________
"TUMBLEWEED"
Back to top
View user's profile Send e-mail Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Wed Dec 01, 2010 10:00 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

- MarkHolloway
I guess you guys didn't notice but if you listen to the sound of the tank in the video you will hear the soundtrack of an M60. Quite different from those old whining 6V53T's. A mistake that only an old Sheridan loader would notice was when they showed the 'safe-to-fire' indicator it was out of range (low gun mount pressure). The other thing I noticed was when the TC gave a coax fire command the first thing the gunner did was turn on the turret power. This should already have been on!!! This would delay your engagement time by about 20 seconds. But I loved the video anyway Smile


Mark,
A member over at tank-net noted the 20sec. time to full turret power engagement and asked why. As I don't recall myself, I suggested that you would likely know. I'd guess it has to do with the stab system (like spooling up gyros on an M60A2 or something) but am not sure.

How different is this from modern tanks in terms of time? What's the reason?

Thanks,
Doug
Back to top
View user's profile Visit poster's website Photo Gallery
C_Sherman
Power User

Offline Offline
Joined: Jan 24, 2006
Posts: 590

PostPosted: Thu Dec 02, 2010 5:04 am
Post subject: Re: M551 Conduct of Fire Training Video (1969)

Hi,

I can't speak for Sheridan's, but I remember that M60's took as much as 10-12 seconds to charge the hydraulics, depending on how much they had bled down. If the accumulator had held pressure, it wouldn't take any time at all from switch-on to ready. But a flat accumulator would recharge with a gawd-awful howl from the pumps, for as long as it took.

I don't remember any other reason that there would be a delay between switch-on and ready to fire, but I might be wrong. It's been a few years...

C

_________________
A positive attitude may not solve all your problems, but it
will annoy enough people to make it worth the effort.
-Herm Albright

Sic gorgiamus allos subjectatos nunc!
Back to top
View user's profile Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Thu Dec 02, 2010 5:35 am
Post subject: Re: M551 Conduct of Fire Training Video (1969)

- C_Sherman
Hi,

I can't speak for Sheridan's, but I remember that M60's took as much as 10-12 seconds to charge the hydraulics, depending on how much they had bled down. If the accumulator had held pressure, it wouldn't take any time at all from switch-on to ready. But a flat accumulator would recharge with a gawd-awful howl from the pumps, for as long as it took.

I don't remember any other reason that there would be a delay between switch-on and ready to fire, but I might be wrong. It's been a few years...

C


There was a delay in the M60A2 series that was definitely the gyros spinning up to something like 40,000 rpm's for the stab system. At shut down, you could hear those puppies winding down for 15-20 minutes.
Back to top
View user's profile Visit poster's website Photo Gallery
MarkHolloway
Power User

Offline Offline
Joined: Apr 08, 2006
Posts: 2054
Location: Beatty, Nevada
PostPosted: Thu Dec 02, 2010 2:30 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

I'll tell you the answer but it will be a let-down for all of those who marveled at how modern the Sheridan was. The 18 to 22 second time delay was to allow the vacuum tubes to warm up! Like the old TV sets. If you are in a Sheridan turret there are two white boxes under the radio. The one on the left (Amplifier Integrator) has latches and can easily be opened. There are tubes mounted inside the cover. Vic Pitts just replaced these on his Sheridan in North Carolina.

Part 2: When the turret power in the Sheridan was turned on then the missile system was automatically placed in stand-by mode. (Gunners may remember the missile 'power supply' light coming on for a second when the turret power was switched on. That's because the missile system is turning on.) Part of the missile system, the rate sensor, had gyros that would start spinning as it went into stand-by. These same gyros were what made the stabilized mode work therefore when the 'STAB' switch was turned on there was no warm-up because the gyros were already operating. This also explains why you could not fire a missile is stabilized mode-the rate sensor could not do both jobs. It either sensed turret movement for missile guidance or it sensed turret movement for stabilized mode but could not do both.

_________________
"TUMBLEWEED"
Back to top
View user's profile Send e-mail Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Thu Dec 02, 2010 6:55 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

Thanks, Mark, passed that tidbit on and it was appreciated. By me, too.
Back to top
View user's profile Visit poster's website Photo Gallery
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Thu Dec 02, 2010 8:48 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

P.S. A viewer writes...

"I didn't notice any "Null" or "Balance" knobs for the stab, were there none, or were they just not visible? "

As I'm too lazy to look through my TM, what is your recollection about Sheridan stab? We never used it once I was out of Sheridan school.
Back to top
View user's profile Visit poster's website Photo Gallery
Dontos
Power User

Offline Offline
Joined: Jan 24, 2006
Posts: 3436
Location: Vine Grove, KY
PostPosted: Fri Dec 03, 2010 3:41 am
Post subject: Re: M551 Conduct of Fire Training Video (1969)

We interupt this thread for a couple of COOL PHOTOS.....





A couple of all you OLD light tank guys.....

Regards
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 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Fri Dec 03, 2010 4:33 am
Post subject: Re: M551 Conduct of Fire Training Video (1969)

I hope they moved those duffle bags first! Laughing

Nah, I know it's not the same vehicle....
Back to top
View user's profile Visit poster's website Photo Gallery
MarkHolloway
Power User

Offline Offline
Joined: Apr 08, 2006
Posts: 2054
Location: Beatty, Nevada
PostPosted: Fri Dec 03, 2010 12:48 pm
Post subject: Re: M551 Conduct of Fire Training Video (1969)

Doug,
Theoreticallyonce you had the turret trimmed in the normal power mode you would not need to make any further adjustments when switching to 'STAB'. There was a box behind the TC's seat known as the accessory box. It is full of circuit boards. If the turret starts to drift when switching to STAB mode then this could be adjusted by turning small screws on the A-12 (traverse) or A-13 (elevation) circuit boards in the accessory box. These are the equivalent of 'stab trim knobs'. This work was done by turret mechs or wanna be turret mechs (me).

When I first got on Sheridans in Germany we were told never to turn the STAB on because it could result in a runaway turret. These runaway turrets were simply a result of the turrret electric drive system not being 'balanced'. At some point we were required to fire a STAB engagement on Table 8. That's when we had to start checking them out. It was my experience that the STAB would work fine after a few adjustments in the accessory box.

_________________
"TUMBLEWEED"
Back to top
View user's profile Send e-mail Photo Gallery
Display posts from previous:   
Post new topic    Reply to topic    Printer Friendly Page    Forum Index ›  AFV News Discussion Board
Page 1 of 1
All times are GMT - 6 Hours



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