[BITList] more on hd bolts

[x50type at cox.net]

Malcolm

the article didn’t say when exactly the bolt problem surfaced and really didn’t make much sense to me.

As the ship was built at avondale, any type of cock-up is possible...............

ct

From: Malcolm 
Sent: Tuesday, August 14, 2012 9:47 AM
To: BITList at lists.bcn.mythic-beasts.com 
Subject: [BITList] FW: hd bolts

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.


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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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