[BITList] FW: hd bolts

[Malcolm]

Hugh & Colin,

 

I think that I have missed something here. Did they find out when the bolts
were weak when the ship was strapped down when they were seeing what the
engines could do, or did they find the problem at the sea trials. If so they
must have been ridiculously weak if they could not stand the friction of the
ship moving through the water. Our ship yard made their own bolts using the
quality steel and sizes as specified by the engine builders.

 

Malcolm.

  _____  

From: bitlist-bounces at lists.bcn.mythic-beasts.com
[mailto:bitlist-bounces at lists.bcn.mythic-beasts.com] On Behalf Of HUGH
Sent: 13 August 2012 21:59
To: BitList
Subject: Re: [BITList] hd bolts

 

Colin,

 

They look to be fairly standard medium speed engines.  If direct drive to
prop or gearbox, with internal or external thrust block, where is the shock
force on the bolts coming from?  Movement limiters (can't recall what we
called them) would be used with resilient mounted engines for electric
propulsion, though they would have a small clearance.  Shear forces wouldn't
come into it there.  Slow speed diesels sat on CI chocks or resin similar,
so fitted bolts were hardly practical.  I can't see medium speed engines
being any different.

 

It pissed down yesterday, after 4 or 5 scorching days.

 

Hugh.

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