±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: 288
Total: 288
Who Is Where:
 Visitors:
01: Home
02: Home
03: Community Forums
04: Community Forums
05: Photo Gallery
06: Treasury
07: Home
08: Downloads
09: News Archive
10: Photo Gallery
11: Home
12: Home
13: Community Forums
14: Photo Gallery
15: Community Forums
16: Community Forums
17: Community Forums
18: Home
19: Home
20: Home
21: Community Forums
22: Community Forums
23: Community Forums
24: Community Forums
25: Home
26: News Archive
27: Home
28: Community Forums
29: Home
30: Community Forums
31: Community Forums
32: Community Forums
33: Home
34: Member Screenshots
35: Community Forums
36: Member Screenshots
37: Downloads
38: News
39: Community Forums
40: Community Forums
41: Your Account
42: Member Screenshots
43: Downloads
44: Community Forums
45: Home
46: Photo Gallery
47: Member Screenshots
48: Member Screenshots
49: Downloads
50: Community Forums
51: Photo Gallery
52: Community Forums
53: Home
54: Member Screenshots
55: Home
56: Community Forums
57: Home
58: Community Forums
59: Photo Gallery
60: Statistics
61: Member Screenshots
62: Downloads
63: News Archive
64: Member Screenshots
65: Community Forums
66: Home
67: News Archive
68: Photo Gallery
69: Member Screenshots
70: Member Screenshots
71: Downloads
72: Photo Gallery
73: Home
74: Member Screenshots
75: Statistics
76: Community Forums
77: Member Screenshots
78: Community Forums
79: Downloads
80: Photo Gallery
81: Statistics
82: Community Forums
83: Home
84: Community Forums
85: Photo Gallery
86: News Archive
87: Photo Gallery
88: Photo Gallery
89: Home
90: Community Forums
91: Statistics
92: Home
93: Home
94: Home
95: Photo Gallery
96: Member Screenshots
97: Member Screenshots
98: News Archive
99: News Archive
100: Home
101: Member Screenshots
102: Community Forums
103: Community Forums
104: Downloads
105: Home
106: Community Forums
107: Community Forums
108: Community Forums
109: Community Forums
110: Community Forums
111: Home
112: Downloads
113: Home
114: Photo Gallery
115: Photo Gallery
116: Downloads
117: Home
118: Home
119: Community Forums
120: Home
121: Community Forums
122: Member Screenshots
123: Downloads
124: Community Forums
125: Your Account
126: Downloads
127: Member Screenshots
128: Photo Gallery
129: Community Forums
130: News
131: Community Forums
132: Home
133: Community Forums
134: Home
135: Home
136: Photo Gallery
137: Community Forums
138: Home
139: Home
140: Photo Gallery
141: Photo Gallery
142: Member Screenshots
143: Photo Gallery
144: Member Screenshots
145: Community Forums
146: Community Forums
147: Home
148: Downloads
149: Community Forums
150: Community Forums
151: Downloads
152: Community Forums
153: Community Forums
154: Home
155: Community Forums
156: Community Forums
157: Community Forums
158: Community Forums
159: Community Forums
160: Community Forums
161: Downloads
162: Home
163: Photo Gallery
164: Home
165: Community Forums
166: Community Forums
167: News
168: Community Forums
169: Home
170: Member Screenshots
171: Photo Gallery
172: Photo Gallery
173: Downloads
174: Community Forums
175: Home
176: Member Screenshots
177: Home
178: Downloads
179: Community Forums
180: News Archive
181: Member Screenshots
182: Member Screenshots
183: Home
184: Member Screenshots
185: Home
186: Community Forums
187: News Archive
188: Search
189: Statistics
190: Member Screenshots
191: News
192: Community Forums
193: Member Screenshots
194: Downloads
195: Photo Gallery
196: Downloads
197: Member Screenshots
198: Community Forums
199: Community Forums
200: Downloads
201: Home
202: Home
203: Downloads
204: Photo Gallery
205: Home
206: Home
207: Downloads
208: News Archive
209: Home
210: News Archive
211: Community Forums
212: Community Forums
213: Home
214: Home
215: Community Forums
216: Member Screenshots
217: Community Forums
218: Statistics
219: Downloads
220: Community Forums
221: Community Forums
222: Community Forums
223: Community Forums
224: Home
225: Home
226: Community Forums
227: Photo Gallery
228: Community Forums
229: Member Screenshots
230: Home
231: Home
232: Home
233: Community Forums
234: Home
235: Community Forums
236: Community Forums
237: Photo Gallery
238: Home
239: Statistics
240: Downloads
241: Community Forums
242: Photo Gallery
243: Community Forums
244: Community Forums
245: Community Forums
246: Home
247: Your Account
248: Community Forums
249: Home
250: Photo Gallery
251: Member Screenshots
252: Home
253: Community Forums
254: Downloads
255: Community Forums
256: Community Forums
257: Community Forums
258: Community Forums
259: Community Forums
260: Home
261: Community Forums
262: Home
263: Photo Gallery
264: Community Forums
265: Member Screenshots
266: Photo Gallery
267: Member Screenshots
268: Member Screenshots
269: Member Screenshots
270: Home
271: Community Forums
272: Community Forums
273: Community Forums
274: Community Forums
275: Community Forums
276: Community Forums
277: Community Forums
278: Community Forums
279: Home
280: Home
281: Community Forums
282: Photo Gallery
283: Community Forums
284: Community Forums
285: Community Forums
286: Home
287: Home
288: Statistics

Staff Online:

No staff members are online!
M47 Question
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: Sun Apr 09, 2006 11:36 am
Post subject: M47 Question

The first tank I ever got on was an M47. Happened at the Motor Pool at the then Selfridge AFB near Detroit where my dad was the NCOIC. Was probably around 1957 or 1958. I assume it was there for some sort of USAF compatability testing. Anyway, I have, what I think, is a pretty vivid memory of the occasion even though I was probably 4 years old. I remember getting in the turret and my dad going to the driver's compartment and starting the engine. After he shut it down he said,"I only started one of the engines". Was there ever a twin-engined M47? Even a prototype? Or do I remember this wrong? Neutral

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

Offline Offline
Joined: Jan 24, 2006
Posts: 517

PostPosted: Sun Apr 09, 2006 6:28 pm
Post subject: Re: M47 Question

'weed:

I'm wondering if he ran the auxilliary generator instead of the main engine. Tanks have big engines with a lot of mass to spin and get started. The story about the M3 Grant was the motor had to be turned for x seconds to spread the lube oil throughout before firing the cylinders. That kind of draw on the electrical system would need either a whole lot of heavy big wet cell batteries or some sort of chorehorse to generate the current.

Any M48 dogs on the list to help out?
Back to top
View user's profile
Doug_Kibbey
Power User

Offline Offline
Joined: Jan 23, 2006
Posts: 4678
Location: The Great Satan
PostPosted: Sun Apr 09, 2006 6:49 pm
Post subject: Re: M47 Question

I did my AIT on 48's...we'd just git it and go...no fancy procedures. Used to idle in for maybe 20 seconds before going anywhere, other than that, nuthin' special.

M47's only had one main engine (this is what Jay Leno has in his "Blastolene Special" car...though seriously modified). I don't recall an aux engine on any of the Patton series of tanks.
Back to top
View user's profile Visit poster's website Photo Gallery
oldtop
Power User

Offline Offline
Joined: Mar 17, 2006
Posts: 70

PostPosted: Sun Apr 09, 2006 7:02 pm
Post subject: Re: M47 Question

The reason you turned the M3 med tank engine over was because it was powered by a "radial engine" you kicked the engine over with the mag switch on off to pump out the built up oil in the lower cylinders and pervent "hydrostatic lock", if you fired-up the engine with the oil in the cylinders you will break the crankshaft and/or rip the cyliners/"jugs" from the crankcase and get what mechs called a "dancing jug"..remember you can't compress a liquid.
..Ever seen picture of aircraft crews turning over their aircraft's engines over by pulling through the props by hand before starting them...same reason. You did the same test on the old 1790 "gaser V-12s.."hydrostatic test"
1. master switch on.
2. mag switch to "off".
3. squeeze start switch lever to on, kick over for 5-6 sec.
4. mag switch to "both"
5. squeeze both start and "boost" levers together
6. pump "wobble pump" like crazy and hope for a cough and roar, if it was a 1790AVSI you pumped even harder.
Back to top
View user's profile
oldtop
Power User

Offline Offline
Joined: Mar 17, 2006
Posts: 70

PostPosted: Sun Apr 09, 2006 7:30 pm
Post subject: Re: M47 Question

The M47 had a 2 cyliner (A41) auxiliary generator (located on the right side of the engine compartment ) as did the M48s up till they were dieselized M48A3, that where the space for the over sized fuel tanks came from in the M48A3s engine compartments. The aux gen was called the "little joe", its cooling airstrem from the engine housing was equipped with a baffle that you engage to devert the heated air to the main engine compartment to heat up the engine before starting. the a41 generator could be started from the drivers compartment or you can "pull start" that bitch by hand. Oh ya the M103 and A1 also had the same thing.
Back to top
View user's profile
Maple_Leaf_Eh
Power User

Offline Offline
Joined: Jan 24, 2006
Posts: 517

PostPosted: Sun Apr 09, 2006 10:33 pm
Post subject: Re: M47 Question

- oldtop
The reason you turned the M3 med tank engine over was because it was powered by a "radial engine" .... Ever seen picture of aircraft crews turning over their aircraft's engines over by pulling through the props by hand before starting them...


That is what I was getting around to saying, without getting off topic on the particular post.

As for auxilliary engines, does anyone recognize the nickname, 'chorehorse' in connection to AFVs, or am I thinking about little generators?
Back to top
View user's profile
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