- Joined
- 27 December 2005
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Given his age and enthusiasm for posting, I assume he passed away, or we'd have heard from him again.
I have also had this suspicion for some time and regret this very much. His contributions were highly interesting and excellent in their technical presentation.Given his age and enthusiasm for posting, I assume he passed away, or we'd have heard from him again.
I've made him Senior Member and Top Contributor, and deservedly so.I was going to nominate him for senior member status a few weeks ago, but then saw how long ago his last activity was, and came to the same conclusion
Thank you for the link. I appreciate you taking the time.What does NS stand for in reference to threads?
Can anybody tell me what " NS " stands for on a 11/16-16 die that is used for chasing male threads. A big :thanks: in advance.elsmar.com
I asked Tony Buttler.Hello.
I'm wondering if someone here might be able to help me? I've been researching the RR Derwent engines for some time now, and struggling with some material specifications... I've had various documents copied from the Archives at Kew, and the various materials used to produce the engines are listed within the schedule of spare parts. Unfortunately, a glossary of terms is missing, and whilst many of the acronyms used are self evident, I'm struggling to identify one in particular. A couple of parts are listed as "N.S". Mainly fixings ("screws"), but also some parts of the actual engine itself.
My first thought was that it might refer to Nimonic, but that is abbreviated elsewhere as Nim.
I'm currently leaning towards Nickel Silver (german silver), as the acronym EPNS refers to "Electroplated Nickel Silver".
I guess my question is: would/could the alloy "Nickel Silver" have been used to manufacture engine parts back in the 40s/50s??
It's generally used for tableware, but I do know that RR have made use of it in their car engines/radiators, I guess on account of it's corrosion resistance.
If I'm way off, I wonder if someone here might have a better suggestion for what N.S is referring to, or be able to stear me in the right direction?
Many thanks in advance!
Hi @red admiral thank you for sharing this. May I ask if you could possibly share the article by William Hawthorne?Sorry for the delay;
The Early History of the Aircraft Gas Turbine in Britain by W Hawthorne
Via the Wayback Machine, here's an archived version of the webpage:OT: Modern British gas turbine development
Contra-rotating turbine technology has advantages in pre-cooled engines both for advanced launchers and for hypersonic civil transport when an air compressor is driven by a helium or hydrogen turbine (giving a large speed of sound mismatch between the turbine and compressor).[/SIZE]
http://www.reactionengines.co.uk/contraturbines.html