Search found 219 matches

by old school
15 May 2016, 20:52
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

Hi Peter, What it seems to boil down to is a juggle with weight and cost……sure your ama will weigh less if it is 15-20% lighter, but it could be even longer at same volume and weigh less if is built in advanced materials. The connecting beams could be carbon composite as well, so this will help to r...
by old school
11 May 2016, 08:06
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

Hi Peter, What you say about twisting of the connecting structure, and that it will be reduced with less volume in the ama, is of course valid. But at the same time it will be depressed more easily, so might become more draggy. I am inclined to think that displacing the volume over a greater length ...
by old school
04 May 2016, 23:52
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

What do I think about the “Fijian catamaran” theory and outrigger dimensions ? -- Performance wise, a smaller lighter ama to w/ward will be beneficial --- if the connecting structure and displacement of the entire craft shows a low DL ratio. This is where a shunter will hold an advantage over a tack...
by old school
04 May 2016, 04:15
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

John, Here is the link -- http://sailingtrivia.ravenyachts.fr/2013/08/the-evolution-of-sailing-multihulls.html. It would be interesting to hear what others think of this theory, it certainly is novel, but makes more sense than the 'age distribution theory [of Oceanic canoe evolution| where the proto...
by old school
03 May 2016, 23:05
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

Peter, Yes, I notice things like the ability to carry a dinghy and move without restrictions around the deck area…..it is important enough to do these things, right? When they are not important, the resultant design is no more useful to me than any number of ordinary mono or multihulls out there. So...
by old school
02 May 2016, 03:24
Forum: Sailing, Upgrades, & Lessons Learned
Topic: Arpex - 30ft. tacking outrigger
Replies: 30
Views: 11165

Re: Arpex - 30ft. tacking outrigger

Hey Peter, Having just taken a look at your Arpex sailing videa makes me think…..I’le have some of that thanks. Seeing the way your deck layout allows you to hoik the dinghy aboard and move about unrestricted handling sails is neat. The craft appears to sail no differently to a catamaran of equal po...
by old school
04 Mar 2016, 22:37
Forum: Proa Tech
Topic: Force balanced proa anyone?
Replies: 20
Views: 6690

Re: Force balanced proa anyone?

Hey old school. Not necessarily, in the link I posted you can see a "kite on a stick" being used on a kayak. Definitely no significant heeling force there! The "stick" is more like rigid lines, which are free to move like kite lines. I agree with your second statement, so that's where the challenge...
by old school
03 Mar 2016, 22:10
Forum: Proa Tech
Topic: Force balanced proa anyone?
Replies: 20
Views: 6690

Re: Force balanced proa anyone?

@tdem, Maybe when you "actively" think about the kite on a stick application, the leverage of the stick on the CB fulcrum will show that the lee side ama will bear the weight of everything bar the sail......kind of making a mute point about an Atlantic proa having even having an ama, any more than a...
by old school
03 Mar 2016, 21:53
Forum: Proa Tech
Topic: Force balanced proa anyone?
Replies: 20
Views: 6690

Re: Force balanced proa anyone?

@blacq,
Forgive me spelling your moniker wrong.....I was sitting in the car at Westhaven marina (best free parking in Auckland city) unconnected when I wrote that message, and did not check to correct it when I got home and posted it
by old school
03 Mar 2016, 08:00
Forum: Proa Tech
Topic: Force balanced proa anyone?
Replies: 20
Views: 6690

Re: Force balanced proa anyone?

Blaqcue, hi, I’m not sure what you mean when you say –“ a shunting Atlantic proa with inclined "balanced" rig to leeward has some merit” --, probably because my mind is set, having accepted the advice of those who have tried it and who advocate flying the ama. I have entertained ideas about hiking t...