Sorry I was too tired last night, and got some names wrong. The name of the yacht is TYSTIE, and the owner: David Tyler. Victor ... From: "Victor Winterthun"...
... pivoted ... the ... Hi Paul, First of all, congratulations with your test results so far. Your remarks on freely swinging pivoted hinges made me think. ...
A possible simplification might be to leave the spans attached to the ends of the battens and just sew flaps of sail-cloth between the spans at the batten...
Hi, I am new to this group but have been sailing a junk rigged cruising yacht for the past 3 years. The boat is a steel hulled, timber decked (teak over ply)...
Hi John: Welcome to the group. NZ to the Carribean in 3-4 months might be a bit tough even for a JR! I would be interested to read about your experiences with...
Hi Don and Victor, Thanks for your thoughts/suggestions about methods of making gurney flaps. I have decided to stick with hinges with predetermined angles on...
I've been re-reading Marchaj. He tested sails having their draft 1/3 af, one having its draft 1/2 aft, and one having its draft 2/3 aft. Their performance...
I did a little drawing. It looks like a flap at the 80% aft point will produce a camber of 14% with a 45% hinge, and a 7% camber with a 22.5 % hinge. Since...
... See the Reddish part of the Junk Rig Tutorial on my Cheap Pages. He's only published a couple things, but he is an ex-astrophysicist or some such and took...
I'm sorry if this has been posted before, but I am just a beginner in junk rigs, have only been a member of this group for a few months, and haven't been...
Hi, Craig I re-read your tutorial. It sounds as though Reddish is getting some percentage of his camber from cutting rounds in his sail. I just don't see how...
I was doing a websearch on this subject this morning, too. It seems to me that we have been using two different ideas interchangably. A gurney flap is mounted...
There is now a picture of twist induced camber and leech fullness in the Files section in the folder "Reddish style sails". This is the picture that Vincent...
... From: Don Taylor <nospamforme@...> To: <junkrig@yahoogroups.com> Sent: Thursday, May 01, 2003 10:00 PM Subject: [junkrig] Re: Reddish ... A very...
I am new to the group, thanks to everyone for the information here. I am trying to locate a reasonably price copy of the Practical Junk Rig by Hasler. So far...
Well, you are VERY lucky to have found a copy AT ALL! I have "searches" placed at powells.com, abebooks.com, and alibris.com. Powells.com emailed me once at...
Tim: FWIW. Your posting got me wondering how aspect ratio is calculated. I had assumed (for no good reason) that it would be height:width, but Reddish uses...
Hi, Don I must not understand your formula, because I got a very large number when I used it. I calculate aspect ratio by drawing a box around the sail, and...
Hi Tim, Mike and other members, 1. Mike, you assume correctly; the recent uses of the terms "camber" and "hinged" refer to 2 means of putting shape into a JR...
Hi, Has anyone had any direct experience of, or read reports of, how well the Reddish sail performs when reefed and beating into a strong wind? I would have...
Tim: Let me try again: Your method is the one that I would have used until I read Vincent Reddish's article, that is: AR = height:width scaled to a width of...
Paul: Reddish says that when he takes out two panels he still makes 90 degrees between tacks in F4 plus weather. The yard is only 20 degrees off vertical so...
Hi, Don I haven't seen that formula used with rigs, but it reminds me of a formula for the AR of rudders from Douglas Phillips-Birts's Sailing Yacht Design:...
A British online bookshop at http://www.mountain-marine.com/ appears to have the book in stock. Their listing includes the following info: "Practical Junk...
... From: Tim Dunn <steelsil@...> To: <junkrig@yahoogroups.com> Sent: Friday, May 02, 2003 2:26 AM Subject: Re: [junkrig] Re: Reddish ... for the AR...
Hi all, Unless my evaporating memory deceives me, didn't we have an earlier thread on this book, in which it emerged that Tiller Books, publisher of Annie...
Hi David, The reason I posted the info about the UK online bookshop was because the postings in messages 2985 and 2986 made it clear that people want the book...
... I can't answer these questions - the original article was not that technical. But it was clear on the geometry of the sail, which he derived from studying...
... This is the way to do it. You will find that a lot of the book, while interesting, is not relevant to many of us. He was designing an easy-to-manage...
... I think my "Foils FAQ" gives the formula as conventionally used by aerodynamicists. It's not what you expect. Foils FAQ is on John Kohnen's boatlinks.com, ...
