|Subject: RE: [harryproa] mast bury|
|Date: 1/29/2007, 6:37 AM|
ps.com.au [mailto:harryproa@ yahoogroups. com.au] On Behalf Of Peter Southwood
Sent: Friday, 26 January 2007 7:41 PM
Subject: Re: [harryproa] mast bury
The short answer is no, but the loads are inversely proportional to the bury. Less bury, higher loads.It is possible to engineer a rig where the mast has no bury at all and is bonded onto a flange mounted on the deck. Something like this was done about 20 years ago by Richard Glanville (here my memory may fail me, so dont quote me on this) If I remember correctly the monohull "Nissan Skyline" had an unstayed rotating wing mast on a stub axle which had a flange attached to the deck by rails and could be moved fore and aft for balance. a lot of carbon rovings were involved, and the flange was a fairly massive piece of structural laminate, but it crossed oceans.Cheers,Peter----- Original Message -----From: Phil KeckSent: Thursday, January 25, 2007 10:42 PMSubject: [harryproa] mast bury
On an unstayed rig, is there a rule of thumb on how much bury you need for a given length of mast?I read on this page:that "The minimum "immersion" of mast into cabin is about 1 in 7 ie a 35' high mast needs 5' of bury." Do you really need that much? What's the bury on elementarry?Thanks,
Never miss an email again!
Yahoo! Toolbar alerts you the instant new Mail arrives. Check it out.
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.17.5/645 - Release Date: 2007/01/22 04:10 PM