Talk:Turbofan

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Contents 1 Manufacturer joint ventures 2 Useful link for GTF 3 Noob friendly video 4 Inaccurate Picture Caption 5 Spoolup sounds on newer turbofans

[edit] Manufacturer joint ventures

I suggest the manufacturer section be revised in order to account for joint ventures. In particular, the IAE V2500 is as much a Pratt product as it is a Rolls product. Marimvibe 06:27, 12 November 2006 (UTC)

[edit] Useful link for GTF

I am not sure how to incorporate this link into the article:[^[1]] Do we have a turbine expert on hand? —Joseph/N328KF (Talk) 16:43, 12 January 2007 (UTC)

[edit] Noob friendly video

http://video.google.com/videoplay?docid=6519732916557390910&q=turbofan&hl=en

[edit] Inaccurate Picture Caption

The caption for the picture of the intake duct on the A7 Corsair states that the decreasing diameter of the duct slows the air entering the engine. I understand that intake air velocity must be decreased but this would not be accomplished my decreasing the intake diameter. Decreasing that diameter would actually increase the velocity by Bernoulli's equation. There is clearly something else causing the airspeed reduction that is not shown in the picture. I suggest that this picture be removed or the caption changed to eliminate this confusion. Any thoughts?

I came to the same conclusion myself. --Dan Griscom (talk) 02:21, 21 May 2008 (UTC)

Yeah, actually it looks to me like the duct gets bigger- that would slow the air for a subsonic aircraft.- (User) WolfKeeper (Talk) 03:38, 21 May 2008 (UTC)

[edit] Spoolup sounds on newer turbofans

Has anyone noticed that on turbofans built since the 1980s, the noise increases dramatically during spoolup, but drops somewhat when the desired RPM is reached? Any idea what causes this and why older turbofans didn't do this? I've noticed it on the 757 and newer 737s; not so much the MD-80s. -Rolypolyman (talk) 02:40, 31 January 2008 (UTC)