Talk:Rolls-Royce RB211

3 spool designs

What is the advantage in terms of efficiency of the three spool design versus the two spool design which is used by everyone else

See Rolls-Royce Trent

RR 1971

I don't remember a large loan to RR from the US government - much more significantly I DO remember RR going bust and having to be nationalised (RR (1971) Ltd) by Mr Heath's Tory government - I have added. Linuxlad 14:34, 8 Jun 2005 (UTC)

What is the source on the US government loan?

--IRelayer 18:53, 15 July 2005 (UTC)

I don't believe there was a loan to RR from the US government. However, if the Brisish government was going to rescue RR and complete development of the RB211, the last thing it wanted was for Lockheed (which was not in a strong financial position) itself to fail as this would have killed the L-1011 project and with it the market for the RB211. So the British government insisted that the US government underwrite the bank loans that Lockheed needed to complete the L-1011 project (around £250million).--JCG33 19:03, 31 December 2006 (UTC)

Notation

How is RB211 meant to be written? With or without the full stop (as in RB.211). Rolls-Royce don't use the . on their website.

I think it should be without the stop. As you say R-R themselves don't use it, neither does Peter Pugh in "The Magic of a Name: The Rolls-Royce Story". Also, the Wiki article on the RB199 doesn't have a stop. On that basis I've removed them from this article.--JCG33 22:21, 30 December 2006 (UTC)

The "B" in RB211 is said to come from Barnoldswick in Lancashire in the area that was described as the "cradle of the modern jet engine". --jmb 22:19, 28 May 2007 (UTC)

the 'RB' designation originally stood for Rover Barnoldswick but Rolls-Royce kept the designation system after they took over Rover's jet engine factory at Barnoldswick, the name Rolls-Royce fortuitously starting with the same initial letter as Rover. — Preceding unsigned comment added by 86.112.68.219 (talk) 18:50, 13 July 2011 (UTC)

Unsnubbered?

"the E4 was the first engine to incorporate a wide chord, unsnubbered, fan to improve efficiency. "

Unsnubbered? Ummm, does anyone have an alternate word here? I tried to find a definition, but every one I found has to do with electronics. Maury 13:24, 6 November 2006 (UTC)

A snubber is a damper used to prevent blade flutter. So presumably unsnubbered could be said to be undamped?--JCG33 21:00, 17 January 2007 (UTC)

Well, yes: you could call it clapperless. 217.205.121.71 17:42, 24 August 2007 (UTC)

Spellings

Someone (not sure who) has changed lots of words from UK English to US English spellings. The Manual of Style says that this should not be done unless there is a compelling reason to do so. What reason is there, particularly as the RB211 was a product produced by a British company? I vote we go back to UK English spellings. Any other views? --JCG33 22:27, 27 April 2007 (UTC)

Done--JCG33 21:03, 28 May 2007 (UTC)

Good on ya. Theres no real vote to be had, its a british company like you said, so you use the british spellings. Reedy Boy 21:21, 28 May 2007 (UTC)

Quite right too... bloody Americans think they own everything... if they had their way wikipedia would be full of US measurements too

Hey, hey be nice to us bloody Americans we are people too. I for one am trying to convert any specs I see to all the different forms. --Colputt 00:27, 13 September 2007 (UTC)

Sound

Not sure if it's exactly encyclopedic information but is there any room to throw in the distinctive sound the engine makes? Planes&mustangs510 (talk) 06:22, 26 November 2008 (UTC)

I think it's by virtue of the wide chord fan design, something to do with how the air meets the blades when they're at high RPMs - specifically the blade tips going supersonic. The Trents seem to make that noise at full power too, and the IAE V2500 The BR700s make a similar noise, although they're only diddy in comparison. You can have a listen to the noise here (spool up is from about 25s until 45s): [[1]] --Ckyliu (talk) 04:13, 22 March 2009 (UTC)

John Coplin (designer worked on RB211) video

There's a video of a Life Stories - an Oral History of British Science featuring John Coplin, a designer who worked on the RB211, on YouTube here: [2]. He gives his talk standing in front of an RB211-22B