±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: 470
Total: 470
Who Is Where:
 Visitors:
01: Home
02: Home
03: Community Forums
04: Home
05: Community Forums
06: Home
07: Community Forums
08: Community Forums
09: Member Screenshots
10: Home
11: Community Forums
12: Home
13: Home
14: Home
15: Home
16: Home
17: Home
18: Home
19: Home
20: Home
21: Home
22: Community Forums
23: Home
24: Photo Gallery
25: Home
26: Community Forums
27: Home
28: Home
29: Community Forums
30: Community Forums
31: Community Forums
32: Community Forums
33: Member Screenshots
34: Community Forums
35: Home
36: Community Forums
37: Community Forums
38: News Archive
39: Home
40: Community Forums
41: Community Forums
42: Photo Gallery
43: Home
44: Community Forums
45: Community Forums
46: Statistics
47: News Archive
48: Community Forums
49: Your Account
50: Home
51: Home
52: Photo Gallery
53: Home
54: Community Forums
55: Home
56: Home
57: Home
58: Home
59: Home
60: Community Forums
61: Community Forums
62: Community Forums
63: Home
64: Community Forums
65: Photo Gallery
66: Home
67: Community Forums
68: Home
69: Community Forums
70: Home
71: Community Forums
72: Member Screenshots
73: Community Forums
74: Home
75: Home
76: Home
77: Home
78: Home
79: Home
80: Home
81: Home
82: Home
83: Home
84: Home
85: Home
86: Home
87: Home
88: Home
89: Home
90: Home
91: Home
92: Home
93: Home
94: Home
95: Home
96: Home
97: Home
98: Home
99: Home
100: Home
101: Home
102: Home
103: Home
104: Home
105: Home
106: Home
107: Home
108: Home
109: Home
110: Home
111: Home
112: Home
113: Home
114: Home
115: Home
116: Home
117: Home
118: Home
119: Home
120: Home
121: Home
122: Home
123: Home
124: Home
125: Home
126: Home
127: Home
128: Home
129: Home
130: Community Forums
131: Community Forums
132: Home
133: Home
134: Home
135: Home
136: Home
137: Home
138: Home
139: Home
140: Home
141: Home
142: Home
143: Home
144: Home
145: Home
146: Community Forums
147: Home
148: Home
149: Home
150: Home
151: Home
152: Home
153: Community Forums
154: Home
155: Home
156: Home
157: Home
158: Home
159: Community Forums
160: Member Screenshots
161: Home
162: Community Forums
163: Your Account
164: Community Forums
165: Home
166: Community Forums
167: Home
168: Home
169: Home
170: Home
171: Home
172: Home
173: Home
174: Home
175: Home
176: Home
177: Home
178: Home
179: Home
180: Home
181: Home
182: Home
183: Home
184: Home
185: Home
186: Home
187: Home
188: Home
189: Home
190: Home
191: Home
192: Home
193: Home
194: Home
195: Home
196: Home
197: Home
198: Home
199: Home
200: Home
201: Home
202: Home
203: Home
204: Home
205: Home
206: Home
207: Home
208: Home
209: Home
210: Home
211: Home
212: Home
213: Home
214: Home
215: Home
216: Home
217: Home
218: Home
219: Home
220: Home
221: Home
222: Home
223: Home
224: Home
225: Home
226: Home
227: Home
228: Home
229: News Archive
230: Community Forums
231: News Archive
232: Community Forums
233: Member Screenshots
234: Home
235: Home
236: News Archive
237: Community Forums
238: Home
239: Statistics
240: Home
241: Home
242: Home
243: Home
244: Home
245: Home
246: Home
247: Community Forums
248: Home
249: Downloads
250: Community Forums
251: Downloads
252: Home
253: Community Forums
254: Community Forums
255: Home
256: Community Forums
257: Home
258: Community Forums
259: Home
260: Community Forums
261: Home
262: Home
263: Member Screenshots
264: Home
265: Community Forums
266: Home
267: Photo Gallery
268: Home
269: Home
270: Home
271: Community Forums
272: Statistics
273: Downloads
274: Member Screenshots
275: Home
276: Home
277: Downloads
278: Community Forums
279: Member Screenshots
280: Home
281: Home
282: Home
283: Contact
284: Home
285: Community Forums
286: Community Forums
287: Community Forums
288: Community Forums
289: Community Forums
290: Photo Gallery
291: Community Forums
292: Community Forums
293: Community Forums
294: Your Account
295: Photo Gallery
296: Home
297: Home
298: Community Forums
299: Community Forums
300: Photo Gallery
301: Community Forums
302: Community Forums
303: Photo Gallery
304: Your Account
305: Photo Gallery
306: Photo Gallery
307: Downloads
308: Community Forums
309: Community Forums
310: Your Account
311: Community Forums
312: Member Screenshots
313: Member Screenshots
314: Home
315: Community Forums
316: News Archive
317: Photo Gallery
318: Member Screenshots
319: Community Forums
320: Community Forums
321: Community Forums
322: Home
323: Photo Gallery
324: Treasury
325: Downloads
326: Home
327: Home
328: Home
329: Photo Gallery
330: Home
331: Community Forums
332: Home
333: Community Forums
334: Home
335: Community Forums
336: Community Forums
337: Community Forums
338: Community Forums
339: Home
340: Home
341: Community Forums
342: Home
343: Community Forums
344: Community Forums
345: Home
346: Home
347: Home
348: Community Forums
349: Member Screenshots
350: Home
351: Photo Gallery
352: Community Forums
353: Photo Gallery
354: Home
355: Home
356: Home
357: Home
358: Member Screenshots
359: Photo Gallery
360: Community Forums
361: Home
362: Community Forums
363: News
364: Photo Gallery
365: Home
366: Community Forums
367: Community Forums
368: Community Forums
369: Community Forums
370: Home
371: Community Forums
372: Home
373: Home
374: Community Forums
375: Home
376: Community Forums
377: Home
378: Home
379: Community Forums
380: Downloads
381: Downloads
382: Community Forums
383: Home
384: Community Forums
385: Your Account
386: Photo Gallery
387: Community Forums
388: Community Forums
389: Home
390: Home
391: Community Forums
392: Home
393: Photo Gallery
394: Home
395: Home
396: News Archive
397: Community Forums
398: Home
399: Community Forums
400: Home
401: Home
402: Community Forums
403: Community Forums
404: Community Forums
405: Community Forums
406: Home
407: Home
408: Home
409: Home
410: Home
411: Home
412: Home
413: Home
414: Home
415: Home
416: Home
417: Home
418: Home
419: Home
420: Home
421: Home
422: Home
423: Home
424: Home
425: Home
426: Home
427: Home
428: News Archive
429: Home
430: Home
431: Home
432: Home
433: Home
434: Home
435: Home
436: Home
437: Home
438: Home
439: Home
440: Home
441: Home
442: Home
443: Home
444: Home
445: Home
446: Home
447: Home
448: Home
449: Home
450: Home
451: Home
452: Home
453: Home
454: Home
455: Home
456: Home
457: Home
458: Home
459: Home
460: Home
461: Home
462: Tell a Friend
463: Home
464: Home
465: Photo Gallery
466: Home
467: Home
468: Home
469: Home
470: Home

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