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telescoping mast   Message List  
Reply | Forward Message #2870 of 6619 |
Re: [harryproa] Re: telescoping mast

Hello Rob,
 
Happy New Year !
 
Can the mast be lowered while the sail is powered up under load, when it would be most needed to lower it ?  What would the procedure be. 
 
Do you have a back up mast or plan for one if the extendable mast should prove not to be practical ? (not that it would be) or would you have to start from scratch ?  
 
George Kuck
Chestsertown, MD

Rob Denney <harryproa@...> wrote:
G'day,

You aren't the only one who hopes it works!
.



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Wed Jan 2, 2008 12:38 am

chesapeake410
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Message #2870 of 6619 |
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I have several questions. Is the mast free standing? Is the mast keel stepped? Is the section wing shaped? Is the mast metal or composite? have you built a...
captian_rapscallion
captian_raps...
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Dec 30, 2007
4:28 am

On Dec 30, 2007 1:28 PM, captian_rapscallion ... Keep 'em coming! ... Yes ... Yes, with a UHMPWE plastic bearing on the keel and another on the deck. ... Yes,...
Rob Denney
proaharry
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Dec 30, 2007
2:18 pm

Thanks Rob, Sounds really interesting. I hope it works. How much heavier does the mast have to be in order to gain this feature? Could the mast be constructed...
captian_rapscallion
captian_raps...
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Dec 30, 2007
10:17 pm

My research into combination of wood and carbon does not give that much financial advantage to going all carbon as the strength to price ratio is not much...
Robert
cateran1949
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Dec 31, 2007
7:54 am

G'day, You aren't the only one who hopes it works! The mast is about 10% heavier, but considerably more than 10% (yet to be discovered) more labour. It would...
Rob Denney
proaharry
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Jan 1, 2008
9:54 pm

Hello Rob, Happy New Year ! Can the mast be lowered while the sail is powered up under load, when it would be most needed to lower it ? What would the...
George Kuck
chesapeake410
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Jan 2, 2008
12:38 am

Back up plan would be to glue it in the extended position. Mark ................................... Mark Stephens www.harryproa.com <http://www.harryproa.com/>...
mark@...
markstephens...
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Jan 2, 2008
12:26 pm

G'day, ... No, but the on part mainsheet (with 4:1 fine trim) can be eased very quicklywhich allows the rig to weathercock, completely depowered. ... Dump...
Rob Denney
proaharry
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Jan 2, 2008
10:10 pm

How is the luff attached to the upper mast so that it can be lowered to the bottom mast or is the upper luff free flying ? Is there a slot or track for the...
George Kuck
chesapeake410
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Jan 2, 2008
11:11 pm

G'day, Both pieces of luff are attached with slugs/slides in an integral bolt rope track. There is a discontinuity at the join, but should be no problem as the...
Rob Denney
proaharry
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Jan 2, 2008
11:39 pm

Hi, You then have a large section at the top, this is adding windage maybe weight. I extended about 50cm to Sidecars two masts and can now sailo under a bridge...
Doug Haines
doha720
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Jan 3, 2008
12:38 am

Hi, Was wondering where the cut off point is in flying a hull racing and not flying a hull on a cruiser? How light do you need to keep a cruiser to be able to...
Doug Haines
doha720
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Jan 3, 2008
1:00 am

My sense of safety as to weight of ww hull is how much windage there is under bare poles for the stability of the boat when it starts to really blow. A large...
Robert
cateran1949
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Jan 3, 2008
11:34 am

Hi I went under yesterday and cleared top of mast by less than 6 inches - tide was higher than expected. I try sometimes to see if Sidecar will fly, but maybe...
Doug Haines
doha720
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Jan 4, 2008
1:58 am

Theoretical max is one hull in the water with max sail availability. Looks like you could do with another couple of meters on the mast if you want to race,...
Robert
cateran1949
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Jan 4, 2008
4:26 am

Hi, I was just going to need to transfer photos from the camera after it fills up. Hopefully nothing to noteworthy in terms of danger. DOug Robert...
Doug Haines
doha720
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Jan 7, 2008
6:58 am

Hi Robert, Wondering if you or anyone would like a quote on an elementarry? Doug Robert <cateran1949@...> wrote: Theoretical max is one hull in the...
Doug Haines
doha720
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Jan 9, 2008
9:54 am

Why is the boom so high off the hull/deck level? Robert <cateran1949@...> wrote: Theoretical max is one hull in the water with max sail...
Doug Haines
doha720
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Jan 9, 2008
10:37 am

G'day, So the aft end will clear the cabin. Pretty unlikely scenario, but one that had to be allowed for. regards, Rob...
Rob Denney
proaharry
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Jan 9, 2008
4:11 pm

Probably hit the pop top still Rob Denney <harryproa@...> wrote: G'day, So the aft end will clear the cabin. Pretty unlikely scenario, but one...
Doug Haines
doha720
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Jan 11, 2008
12:59 am

There should be plenty of historical terms for the appropriate strings. I'll check out the ropes with a neighbour who is a writer of historical novels on...
Robert
cateran1949
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Jan 3, 2008
10:53 am

I haven't gotten far enough along with the scantlings to figure out that kind of things yet you see. I want to get that far mind you, I'm working on trimaran...
Raps callion
captian_raps...
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Jan 4, 2008
10:38 pm

any new news on the telescoping mast?...
captian_rapscallion
captian_raps...
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Apr 18, 2008
10:03 pm

G'day, Looking for a shed, then it is all systems go. My new partner needs to have his mast ( a 60'/18m stayed wing mast by the end of July, and we need to...
Rob Denney
proaharry
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Apr 19, 2008
2:45 am

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