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Rolls-Royce

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Rolls-Royce licensed-built some of the engine series, but I don't know which ones or when (the 1970s weres the bulk of production), nor do I have sources on this. Jane's may have something. - BilCat (talk) 09:30, 27 December 2009 (UTC)[reply]

Or the Flight archive possibly? Nimbus (Cumulus nimbus floats by) 09:43, 27 December 2009 (UTC)[reply]
Its not the IO-368 is it (which we don't seem to have an article for) - according to the 1980-81 Janes's it was mainly developed by RR.Nigel Ish (talk) 15:47, 27 December 2009 (UTC)[reply]
The IO-368 appears to be unrelated, and unsold. This source and the next volume linked to it, have some details, but it's not really a reliable source, so I'm going easy on citing it. Flight Int'l has a good article here; it's from 1970, and has some good deltails on the engines, esp. the Hydra-Torque drive, with illustrations. I'll try to update the article and cites form it in the next few days. I'd also like to find a good article analyzing the engines' commercial failure. It would help tp fill out this article well, and might make a good DYK for a relatively unknown series of engines. - BilCat (talk) 18:15, 27 December 2009 (UTC)[reply]
Here is a schematic drawing of a Tiara 6 from Flight which can be used as an external link [1]. Two things that I can see from it are that it has hydraulic valve lifters (same as the Lycomings) but it has detachable cylinder heads (unlike a Lycoming, easier for maintenance but more likely to blow a head gasket!). Something anyway, this range has disappeared into obscurity. Nimbus (Cumulus nimbus floats by) 01:25, 28 December 2009 (UTC)[reply]
Looking at the drawing I can also see a misconception in the text. The article currently says that the prop is driven by the camshaft (I had my doubts!). What is actually happening is that the prop is being gear driven from the crankshaft and this gear is also driving the camshaft (hopefully at half engine speed). I was sent on a five week theory and practical course on aircraft piston engines in '97 as part of the UK civil AME syllabus which was mainly Lycoming based, with the odd Merlin bit thrown in for the BBMF boys on the course. A highlight of this stimulating course (apart from the electromagnetism phase!) was to visit the engine collection in the London Science Museum where we spent 10 minutes looking at the engines and two hours in the pub across the road. Hope that I'm not boring you!! Nimbus (Cumulus nimbus floats by) 01:59, 28 December 2009 (UTC)[reply]
OK, that sounds correct. Gunston has a description in his Development of Piston Engines (I think you have that one - page number is in the article for the 2.nd edition_, and the Flight article link posted above also has a link. I'm definetely out of my element here, so feel free to read those, and then correct text. Thanks. - BilCat (talk) 02:15, 28 December 2009 (UTC)[reply]
I'll just tweak it Bill, frustrating that there is not much info on this range or the license-built RR-Continentals. I would imagine that lack of spares support killed them off. I have seen Conti's in the hangar, need to quiz the owners and take some photos. Nimbus (Cumulus nimbus floats by) 02:36, 28 December 2009 (UTC)[reply]
Photos would be great, if you could get them! There's not much info period (full-stop) on them anywhere, US- or UK-built versions. - BilCat (talk) 03:06, 28 December 2009 (UTC)[reply]

Certificating

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"the costs of certificating their products" seems awkward. Should it be certifying?Flight Risk (talk) 19:52, 22 February 2015 (UTC)[reply]

I believe that the current version is correct, there is a subtle difference between the verbs 'to certificate' and 'to certify'. Certification of an engine is the process of testing and granting of a type airworthiness document (FAA TCDS in the U.S.), perhaps best thought of as a one-off process. 'Certifying' is used more for ongoing maintenance paperwork, an engineer may write 'I certify that this engine is released to service for another 100 hours' or similar. Nimbus (Cumulus nimbus floats by) 21:49, 22 February 2015 (UTC)[reply]
Perhaps "the costs of certification of their products" - is this less awkward?Nigel Ish (talk) 22:14, 22 February 2015 (UTC)[reply]
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