This one goes back a ways, but I just stumbled across the document I was thinking of when I originally replied. It's called 'Field Manual No. 5-499 - ...
6238
Randy Quimpo
bkrq
Feb 2, 2005 1:38 pm
Hi everyone, I'm building myself a relatively small catamaran, and I am very interested in putting a junk rig on it. I've read that its easy to operate, but...
6239
Victor Winterthun
vwinterthun
Feb 2, 2005 2:11 pm
Hi Randy. You may put the mast in one of the hulls. As the Chinese lug rig is very easy to reef, you may have a lot of sail, and to try it out, you can make it...
6240
Timothy Dunn
steelsil2
Feb 2, 2005 5:04 pm
Hi, Randy However, if your hulls are by Wharram, or of the v bottom type, you will have high wetted surface, which is not fast in light winds. Tim Dunn ... ...
6241
seatimsboat@...
seatimsboat
Feb 2, 2005 5:04 pm
Hi Randy . I am also considering the junk rig, the wharram soft wing, and a type of swing rig for my freedom 40. I am currently making a swing rig for my 9...
6242
Victor Winterthun
vwinterthun
Feb 2, 2005 6:00 pm
If you are making some sort of Swing Wing, you should keep it as slim as possible. Victor ... From: seatimsboat@... To: junkrig@yahoogroups.com Sent:...
6243
Timothy Dunn
steelsil2
Feb 2, 2005 7:03 pm
Hi, Victor Tom Speer, aerodynamic specialist, also says that the sleeve part should be short (fore and aft) to reduce resistance. But both he and BJ Slotbom...
6244
Victor Winterthun
vwinterthun
Feb 2, 2005 7:15 pm
Hi Tim. They might be right, but who is talking about a low aspect sail?. Victor ... From: Timothy Dunn To: junkrig@yahoogroups.com Sent: Wednesday, February...
6245
Timothy Dunn
steelsil2
Feb 2, 2005 7:20 pm
See: http://www.tspeer.com/Wingmasts/teardropPaper.htm and http://www.boatdesign.net/forums/showthread.php?t=603&highlight=wing+sail Tim Dunn ... ===== Tim...
6246
Timothy Dunn
steelsil2
Feb 2, 2005 7:48 pm
Hi, Victor I don't know if that is what our new poster has in mind, but it is typical of the junk rig. The practical problem is that it probably takes a pretty...
6247
Victor Winterthun
vwinterthun
Feb 2, 2005 8:51 pm
Hi Tim The most important item to bring the Chinese Lug Rig forward now is a slimmer mast. That means that we also may make higher mast without too much...
6248
Don Taylor - nospamfo...
schoonerpilger
Feb 2, 2005 9:15 pm
... Do you really 'need' an unstayed mast for a wingsail any more than you really 'need' an unstayed mast for a junk rig? I know that there are advantagous to...
6249
Timothy Dunn
steelsil2
Feb 2, 2005 10:21 pm
Hi, Don We were talking about tall rigs. In a tall rig, the shrouds are at an even more acute angle (especially on a monohull) than on a short rig. Your...
6250
Randy Quimpo
bkrq
Feb 3, 2005 12:55 am
Hi everyone, Thanks for the quick responses! Already very informative, but here are more details on my "project" so maybe you can advise me better: 1. The...
6251
seatimsboat@...
seatimsboat
Feb 3, 2005 7:19 am
Hi Victor I would like to thank everybody for their thoughtful responses I have read several posts by tspeer and have visited his website. I am not an engineer...
6252
Timothy Dunn
steelsil2
Feb 3, 2005 7:28 am
Hi, Tim For Speer plus balance, see http://www.freewingmasts.co.uk/ It's a nice refinement on a balestron rig. The other Tim ===== Tim...
6253
Victor Winterthun
vwinterthun
Feb 3, 2005 9:39 am
Hi Don. What is the distance from your yard to the stays at the top of the mast?. I feel it should be min. 6' ?. How much is the dim. at partners redused...
6254
Martyn Aldis
martynaldis
Feb 3, 2005 10:08 am
In message <ctmd66+rmr0@eGroups.com>, polynesia_tamata <luisnine@...> writes ... Swing wing experiences. I have posted my reservations about...
6255
Don Taylor
schoonerpilger
Feb 3, 2005 1:27 pm
... Victor: The schematics show 3-4' between the yard and the attachment point for the satys, but I have both sails hoisted maybe one foot higher than the ...
6256
Victor Winterthun
vwinterthun
Feb 3, 2005 1:48 pm
Hi Don. Don't your stays interfere with the yard?, or are the stays so slack that the yard push them avay?. What is the height of the mast, and size of the...
6257
Don Taylor
schoonerpilger
Feb 3, 2005 2:36 pm
... No, the stays do not interfere with the yard, but they do occasionally interfere with the forward ends of the upper 2 battens on the foresail. I would like...
6258
seatimsboat@...
seatimsboat
Feb 3, 2005 3:36 pm
Interesting, I had thought that aft mast bend in stronger winds would act in conjunction with the greater leverage of the batten portion behind the mast to ...
6259
seatimsboat@...
seatimsboat
Feb 3, 2005 3:56 pm
In a message dated 2/2/2005 11:30:45 PM Pacific Standard Time, steelsil2@... writes: www.freewingmasts.co.uk Shure is . Tim [Non-text portions of...
6260
Victor Winterthun
vwinterthun
Feb 3, 2005 5:20 pm
Hi Don. May be an advantage with the short yard, is that it will not lay hard onto the stay?. Are both masts made of the same material/dim.? What is the...
6261
Don Taylor
schoonerpilger
Feb 3, 2005 5:35 pm
... Well the after end of the yard will lai on the stay, but not the forward end. I am sure that Tom Colvin did the basic geometry for this boat, plus it was...
6262
Timothy Dunn
steelsil2
Feb 3, 2005 6:11 pm
Hi, Martyn Thanks for including the info about the lee side luffing in the swing wing rig. That's new info. Tim Dunn ===== Tim Dunnwww.steelsilhouettes.com ...
6263
Martyn Aldis
martynaldis
Feb 3, 2005 6:46 pm
Hi Tim, I'm afraid I have confused you about who wrote the (somewhat negative) soft wing sail comments. Bertrand, who has just rigged his "tiki" has not...
6264
Victor Winterthun
vwinterthun
Feb 4, 2005 12:31 pm
Hi Don. You wrote: The masts are constant section: 5" schedule 40 6061 aluminium pipe which translates to: 141.3 mm. OD x 6.55 mm wall thickness. I don't have...
6265
Don Taylor
schoonerpilger
Feb 4, 2005 1:34 pm
... Victor The specifications call for T6. Don....
6266
Andre
mabelsgift
Feb 4, 2005 8:19 pm
Thanks to all who suggested different designs and designers for me to look at. I have decided to buuild a Roberts 246 in wood epoxy. I could have bought second...
