Hi Bernard, The last few postings in this thread discuss how the hooked leech might be achieved. However there has been no mention of further windtunnel...
2261
junkrig@yahoogroups.com
Dec 1, 2002 4:58 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the junkrig group. File :...
... Well, these fellows (like Webber on Cook's expeditions) were the 'cameras' of their day and were charged with making accurate representations of scenes,...
http://www2.friend.lynet/~dadadata/junk./platt/platt_chinese_sail.html Hmmm. That URL looks vaguely familiar. <chuckle> Any browser should be able to print...
... I apologize for being so stupid, but I'm still trying to understand the right shape to make the sail to achieve the hooked leech... sorry to be clueless,...
You are not being stupid at all. This topic of spooned leeches/quasi- Gurney effect flaps is still in the process of being thought out. I am groping along as...
... thanks for the kind words, but as sailmakers go, honestly I'm dumb as paint :-) have yet to sew my first sail, and I keep putting it off ... ... flaps......
Hi Paul, Bernard and others Particularly interested in the current developments on the hooked leech as I'm just about to cut my new aluminium battens to fit ...
... Chinese sails had a reinforcing boltrope sewn *to* the fabric, but there was also a heavy rope attached to the periphery of the battens forming a "frame"...
This discussion of spooning sails to increase lift at high AOA's is very interesting. I was wondering if having this curvature and lift producing element at...
Like everybody else I am very excited about Bernard's findings and I have been thinking about how I might add a Gurney flap to Pilger's sails. A couple...
2273
junkrig@yahoogroups.com
Dec 2, 2002 8:00 pm
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the junkrig group. File :...
After the previous tests with the flat model with flap, I did one more test. I increased the flap angle from 45 to 90 degrees and plotted the lift/drag values...
Hi Don, Your comments about how one may create the flap effect, and the possible pitfalls, give us all food for thought and are especially well timed. I agree...
Hi Bernard, Thank you for sharing your test results and your preference about which route to take. I am particularly interested in your preferred route of...
Hi Bernard, I will be doing some much needed maintenance on my boat over the next few weeks and I will also use your suggestions for "spooning"* my ...
2279
junkrig@yahoogroups.com
Dec 3, 2002 8:39 am
The following junkrig poll is now closed. Here are the final results: POLL QUESTION: Paul Stewart-Day has proposed that we change the access permissions to...
Just to be sure that I'm clear on the dicussion,there never was,never will be(?), a FLAT sail.I've had a "flat cut" one but it was NEVER flat if there was...
Hi, Sure, once flat-cut junk rig sails with stiff battens, made from terylene/dacron or similar cloth, they tend to increasingly belly out as wind strength...
Heaving to? Single, Double masters? __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. ...
... that was my thought. I dunno enough about hydro or aero dynamics to know whether this is relevant or not, but I've seen a couple of rudders on biggish...
Hi, De I remember seeing flaps in a v pattern at the back of a trim tab on a wind vane, the kind that used a vertical vane with a trim tab that moved a rudder...
... Sure. These are analogous to winglets on aircraft. They keep the pressure from leaking off the end of the rudder, to speak loosely, and make a shallow...
Hi Bernard, Don't beat yourself up about your mathematical error. It is quite reassuring to see that you check your figures, but even more imprortantly it...
