Pic of the Day

mark-f
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Re: Pic of the Day

Post by mark-f » Fri Sep 01, 2017 3:23 pm

"Developed in the mid 1990’s, 7068 alloy was designed as a higher strength alternative to 7075 for ordnance applications".

https://www.smithmetal.com/7068.htm

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Renegadenemo
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Re: Pic of the Day

Post by Renegadenemo » Sat Sep 02, 2017 7:44 pm

"Developed in the mid 1990’s, 7068 alloy was designed as a higher strength alternative to 7075 for ordnance applications".
And for the V-bombers in the 50s...
I'm only a plumber from Cannock...

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conistoncollie
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Re: Pic of the Day

Post by conistoncollie » Sun Sep 03, 2017 11:16 am

Was that supplied by Birmetals / Birmalloy?

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Renegadenemo
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Re: Pic of the Day

Post by Renegadenemo » Sun Sep 03, 2017 12:20 pm

Was that supplied by Birmetals / Birmalloy?
No way to be sure, but I suspect not. The Birmetals material seems to be pretty ordinary marine grade, 5xxx material but the main outer floor is very exotic. It's obviously come on a roll because it's 18ft long but so narrow that they've had to use two lengths of it joined down the centreline. It'll be something made especially for the Vulcan or Victor. It's had to be annealed and furnace cooled to get it soft enough to do anything with it and it's a nightmare to weld - another of those alloys that 'cannot be welded' and now we have to make as fixture for it so it can be heated and quenched to restore its original properties but without it deviating to the point where it won't fit back on the boat.
I'm only a plumber from Cannock...

"As to reward, my profession is its own reward;" Sherlock Holmes

Voltaire's apology when he wrote a long letter: "I didn't have time to make it shorter."

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Mike Bull
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Re: Pic of the Day

Post by Mike Bull » Sun Sep 03, 2017 4:54 pm

To be pedantic for a minute (Me? No, never!) the floor must be nearer 20 feet long, because it starts at F19 like the cradle, which itself is 19 feet long and still doesn't reach all the way to the back of the boat.

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Renegadenemo
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Re: Pic of the Day

Post by Renegadenemo » Mon Sep 04, 2017 1:15 am

To be pedantic for a minute (Me? No, never!) the floor must be nearer 20 feet long, because it starts at F19 like the cradle, which itself is 19 feet long and still doesn't reach all the way to the back of the boat.
And so one personal attribute complements another. Me, being so forgetful, had to remind myself that it measured about 18' before we thought about sticking the broken part from the front back on so it's going to be nearer 21' when complete.
I'm only a plumber from Cannock...

"As to reward, my profession is its own reward;" Sherlock Holmes

Voltaire's apology when he wrote a long letter: "I didn't have time to make it shorter."

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