... From: Anthony Bull To: proa_file@yahoogroups.com Sent: 31 July 2001 10:43 Subject: Re: [proa_file] Rig placement <snip> Tom Speer suggests the old trick of...
3036
Fishwick
Fishwick@...
Aug 1, 2001 9:49 am
On: Mon, 30 Jul 2001 20:59:03 -0700 Wrote: Ron Badley <badley@...> ... weights ... the ... Er . . . No! That would imply that an Atlantic proa with...
3038
Joseph Oster
oster@...
Aug 1, 2001 5:27 pm
... More to tell about that meeting, out of time for now... Check out this photo he loaned me to scan!!! (WARNING! 192K) ...
3039
Michael Schacht
michael@...
Aug 1, 2001 6:40 pm
... I've been sailing with some Captain Blighs before, but it never went to that extreme... :-) -- Michael Schacht http://www.schachtdesign.com/proafile The...
3040
Michael Schacht
michael@...
Aug 1, 2001 6:49 pm
... Wonderful photo, wonderfully scanned. Thanks, Joseph. -- Michael Schacht http://www.schachtdesign.com/proafile The ProaFile: Re-discovering the Oceanic...
3041
Ted Lamont
tlamont@...
Aug 2, 2001 1:45 am
Nice pic Joseph, had me reaching for another G & T and it's only 8-30! Ted "It's always a good idea to keep the pointy end going forward as much as possible."...
3042
Dave Culp
dave@...
Aug 3, 2001 4:49 am
Several posters have correctly pointed out that righting moment (RM) has nothing to do with the rig at all; it is entirely controlled by the hull(s) and their...
3043
Ted Lamont
tlamont@...
Aug 3, 2001 5:43 am
Agreeing with and/or understanding most of your comment's Dave i'll just add what i have said before on the Multi list some months back. If a heeling beach cat...
3044
Malcolm Smith
mal@...
Aug 3, 2001 8:22 am
For what it's worth, I've put up a diagram at http:/www.cybernautics.com.au/Vproa/CantedSails.html which hopefully shows the relationship between canted rig...
3045
Malcolm Smith
mal@...
Aug 3, 2001 8:26 am
Sorry, that should have been http://www.cybernautics.com.au/Vproa/CantedSails.html ... -- Cybernautics - Designers and Naval Architects ...
3046
Malcolm Smith
mal@...
Aug 3, 2001 8:46 am
... Expanding on this, at large angles of heel, the foot of the sail begins to take on some of the role of the luff, the direction of the drag vector changes...
3047
Malcolm Smith
mal@...
Aug 3, 2001 8:58 am
... This is not entirely correct. The projected area argument is also a bit of a myth because the planform is arranged at a low angle of incidence to the wind...
3048
Dave Culp
dave@...
Aug 5, 2001 7:01 am
... I would think that the most-extreme case might favor both placements equally; any other scenario would favor the rig to leeward. Two other effects favor...
3049
Dave Culp
dave@...
Aug 5, 2001 7:01 am
... Agreed, Ted. However, kite powered proas pretty badly "bend" the definition of Atlantic proa. For instance, all my proas are "atlantic," in that the small...
3050
Dave Culp
dave@...
Aug 5, 2001 7:01 am
... I agree with you regarding the angle of incidence, Mal. It does increase and it has a large effect--possibly the major effect. But let's get something...
3051
Malcolm Smith
mal@...
Aug 5, 2001 10:53 am
Dave Culp wrote; ... The plane that we are projecting the length onto is the plane normal to the apparent wind direction. Lets say the apparent wind direction ...
3052
Brian Southwood
briansou@...
Aug 5, 2001 8:15 pm
Dave, Using the same set of assumptions and simplifications I take it you would agree that a rig canted to leeward would be stable due to heeling moment...
3053
Ted Lamont
tlamont@...
Aug 6, 2001 2:47 am
... Starting from the atlantic and not from kite boats, i've always looked at a real kite as a perfect complement in the atlantic wardrobe as i thought no...
3054
Arto Hakkarainen
ahakkara@...
Aug 6, 2001 1:17 pm
At 10:50 3.7.2001 -0000, you wrote: ... = sorvi ... = iho, venemerkityksessä lähinnä ulkopinta ... = jyrsin ... = sivusuhde (purjepinta-alan korkeuden...
3055
Dave Culp
dave@...
Aug 7, 2001 4:27 pm
... Dammit, I think you're right. I *hate* it when that happens... ;-) Actually, I think you're wrong, but not in any significant way. Large angles of heel,...
3056
Dave Culp
dave@...
Aug 7, 2001 4:41 pm
... Kiteboats typically "wear about," they do not tack. A very few kite buggiers can successfully tack their buggies, while wearing their kites across. The...
3057
Rob Denney
carbondesign@...
Aug 9, 2001 1:09 am
G'day, Seems I am not quite as hopeless a boatbuilder as I thought. Harry chafed through it's mooring yesterday and washed up on a sandy beach in big winds ...
3058
Hemi Fox
waka_ma_uri@...
Aug 9, 2001 6:05 am
Kia Ora Rob, Love the story of Harry going Landwise. These are the things that build legends. So can you briefly describe the hull material? (I love wood too) ...
3059
Ted Lamont
tlamont@...
Aug 9, 2001 7:45 am
... Sounds great ------ to watch, especially an anal pitch-pole ... My thoughts on kites have always been with the old rig where i was constricted between my...
3060
mal@...
Aug 10, 2001 2:29 am
... Ted, I may have missed this in an earlier post, but what are you planning to do with your rig? Are if you are doing something to it, what were the...
3061
Ted Lamont
tlamont@...
Aug 10, 2001 7:54 am
What you missed, Mal, is the "probably".... I've been talking to anyone who knows or professes to know about schooner rigs (this list and others), but am not...
3062
Rob Denney
carbondesign@...
Aug 10, 2001 1:17 pm
G'day, ... Harry is 8mm (5/16) flexiply (95% of the veneer runs lengthwise), butt block joined at 8' intervals. Laminate is 400 double bias inside and out, ...
3063
Ted Lamont
tlamont@...
Aug 10, 2001 2:13 pm
Mal Basically there was too much rig and it was too old - 20 years so most stays were past use-by - i had replaced about 6 of the 18 as they broke or frayed...
3064
Brian Southwood
briansou@...
Aug 10, 2001 8:20 pm
Ted, So you want to Pacify the Atlantic? ;-) - like oil on troubled waters... Good luck. Your planned new rig sounds like a good compromise with reality ...
3065
Terho Halme
thalme@...
Aug 10, 2001 8:27 pm
... even ... about ... There are some good tips of scantlings at Dave Gerr: The Elements of Boat Strength. The book is for monohulls, but you can use it as a ...
