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Old 11-14-2017, 07:25 PM
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benman94 benman94 is offline
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Question about 15GP22 production

Does anyone have concrete information as to when exactly commercial production of the 15GP22 began, and when it ended?

I know the developmental tubes in the Model 5s were built starting in November of 1953. I'm assuming commercial production of the 15GP22 started in late December 1953 or early January of 1954, and probably lasted maybe six-ish months at most? And about when was hand welding of the ultor flange abandon in favour of automated welding?

My good 15GP22 was manufactured the 13th week of 1954; I'm trying to determine if this tube was hand or machine welded.
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Old 11-14-2017, 08:16 PM
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miniman82 miniman82 is offline
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Answer: both, not that it matters.

Even a ‘machine’ weld in those days was still a manually controlled TIG weld, and any holes found by the leak detector would have to be fixed by hand.
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Old 11-15-2017, 10:43 AM
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Quote:
Originally Posted by miniman82 View Post
Answer: both, not that it matters.

Even a ‘machine’ weld in those days was still a manually controlled TIG weld, and any holes found by the leak detector would have to be fixed by hand.
Thanks Nick. Bob mentioned to me that the later 15Gs seem to have a lower leak rate in his opinion.

Does anyone know when production started and stopped? I'm more interested in knowing how long the tube was actually built.
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Old 11-15-2017, 11:17 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by benman94 View Post
Thanks Nick. Bob mentioned to me that the later 15Gs seem to have a lower leak rate in his opinion.

Does anyone know when production started and stopped? I'm more interested in knowing how long the tube was actually built.
My 1964 Allied still listed a 15GP22 for $222.00. IDK, if it was NOS or recently manufactured.
The newest type listed was a 21FBP22.
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