If you were going to fabricate new Hurricane stacks…

304 Stainless would be the material of choice for headers mild steel will work but not be as durable and prone to cracking if not fabricated well…………..

304 Stainless would be the material of choice for headers mild steel will work but not be as durable and prone to cracking if not fabricated well…………..

Yup, altho may make some mild steel versions for non flyers.. 😎

I know that this company has experience of fabricating exhaust stubs – check under Spitfire and Lancaster projects! 🙂

I know that this company has experience of fabricating exhaust stubs – check under Spitfire and Lancaster projects! 🙂

I wasn’t planning on paying someone else to do it…..;)

Inconel – cos that what they were made of!

😉

Bruce

The rather sad academic question I’d ask is… WHAT Inconel? There are quite a few different alloys under that trade name (see: http://www.specialmetals.com/products/index.php). It’s easy to find out if there’s a sample available, though!

Beat me too it! Inconel is a trade name NOT a specific alloy, bit like saying stainless without reference to type……………..

I wasn’t planning on paying someone else to do it…..;)

I was thinking of the detail contained in some of the photo captions i.e. “Lancaster exhausts manufactured from stainless steel for ….”

I also know that a couple of years ago they made stainless steel ‘cans’ that went on ‘Night Reaper’ at Coningsby; as featured in several ‘prestigious publications!’ 😉

Inconel – cos that what they were made of!
😉

Bruce

I’ve seen some completely rotted out/rusted ones, so there may have been some mild steel ones at some point.

I suspect they realised after a while that mild steel rotted out, so switched to Inconel….

but I may be wrong!

I suspect they realised after a while that mild steel rotted out, so switched to Inconel….

but I may be wrong!

Possible, or maybe a shortage of Inconel?

The rather sad academic question I’d ask is… WHAT Inconel? There are quite a few different alloys under that trade name (see: http://www.specialmetals.com/products/index.php). It’s easy to find out if there’s a sample available, though!

I suspect they realised after a while that mild steel rotted out, so switched to Inconel….

but I may be wrong!

Actually I think it was the other way round, the mild steel ones were a later fitment, presumably cheaper to make, they did burn out, but were just changed out!

Beat me too it! Inconel is a trade name NOT a specific alloy, bit like saying stainless without reference to type……………..

There’s always AMS 5544 Waspalloy…;)

Anywho, I can sort out what particular alloy once I get the die’s for bending shapes etc.. 🙂

The question wasn’t ‘Which Inconel’ – it was whether to use Mild Steel, or ‘an’ Inconel.

Having been in the business for a while, I do know the difference!

Bruce

If I were planning to make six sets of Merlin exhausts, I probably wouldn’t plan to do much else for the rest of the year. 😮

The rather sad academic question I’d ask is… WHAT Inconel? There are quite a few different alloys under that trade name (see: http://www.specialmetals.com/products/index.php). It’s easy to find out if there’s a sample available, though!

It was Inconel 625
Mild steel was used at various points during and after the war, it is actually pretty resilient in that it does not crack as quickly as Inconel, but probably doesn`t last as long either.
It is much better to use the cheapest stainless sheet for non-flyers than mild, the difference in cost isn`t worth worrying about, but a really good stainless which could possibly be passed as an alternative to Inconel, is 321, which is Titanium stabilised and is frequently used in Aircraft exhaust systems, pretty expensive still, but less than inconel and maybe easier to press.

Are you talking about making single Hurricane stubs or the twin siamesed ejector / fishtail type?

Pete

If you were going to fabricate new Hurricane stacks…

STACKS!!! Another aircraft term that is derived (possibly) from the maritime world! :diablo:

Sorry, wrong thread. 😮

The question wasn’t ‘Which Inconel’ – it was whether to use Mild Steel, or ‘an’ Inconel.

Having been in the business for a while, I do know the difference!

Bruce

Wasn’t aimed specifically at you, Bruce – just wanting to clarify that there’s a range of alloys under that name. If someone has a sample of the original material, it should be relatively easy to find out which alloy it is.

STACKS!!! Another aircraft term that is derived (possibly) from the maritime world! :diablo:

Sorry, wrong thread. 😮

LOL! good catch!

It was Inconel 625
Are you talking about making single Hurricane stubs or the twin siamesed ejector / fishtail type?

Pete

The latter & now I know which inconel 🙂

If I were planning to make six sets of Merlin exhausts, I probably wouldn’t plan to do much else for the rest of the year. 😮

Can get the flanges cut out with a waterjet so thats the “work of a moment” & once the dies are made the stamping won’t take long. Then it’s just a matter of welding em up on a fixture…. or 2 or 3……
Fairly straightforward Tiggery pokery 🙂

Can get the flanges cut out with a waterjet so thats the “work of a moment” & once the dies are made the stamping won’t take long. Then it’s just a matter of welding em up on a fixture…. or 2 or 3……
Fairly straightforward Tiggery pokery 🙂

I think you might find that is a little bit more to it than that; but good look anyway.