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How do Bulleids Work?

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How do Bulleids Work? Empty How do Bulleids Work?

Post by 35005CP Sun Aug 23, 2009 6:53 am

Hi all,

Following a Round Robin email regarding Tangmere's beat not sounding right - I thought I would start this thread; in the hope of starting some good dicussion?

How many beats and reliability??? Free for all to discuss! Carry on!!!

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35005CP
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Posts : 1287
Join date : 2009-05-19
Age : 45
Location : Sussex, But Imagining 70A or Ropley MPD.

https://nineelms.forumotion.com & http://www.wix.com/35005cp

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Post by 34028 Thu Aug 09, 2012 4:13 am

Somewhere on a videotape at home the narrator at the very end of the programme comments that 35028 Clan Line has an uneven exhaust beat as well. It's an old programme called "Express Locomotives of the Southern Railway" I think.

Having seen Tangmere on the mainline in various locations over the past 18 months I can't say I've noticed anything odd about the exhaust beat, or has it been sorted?
Pete

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Posts : 83
Join date : 2010-03-16
Age : 63
Location : Sandhurst

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Post by Nickt Fri Aug 10, 2012 6:43 am

Three cylinder locos won't have a perfect beat, even when perfectly set up. The exhaust passages are of different length and shape. The inside cylinder of Bulleids is 8 degress above the horizontal but the crank is offset too, so this may not be a factor on the audible beat.

Nickt

Posts : 101
Join date : 2010-05-26

http://www.southern-locomotives.co.uk/

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Post by 34028 Fri Aug 10, 2012 9:32 pm

Is that because the inclination of the inside cylinder causes the angles on the crank to be uneven? 120° +120°-y +120°+y (y= the angle of inclination of the inside cylinder)?

Pete

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