Reply
 
Thread Tools Search this Thread
 
Old 19 June 2005, 22:12   #21
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by codprawn
Just a thought - would a big kite tow a RIB??? Maybe not a big one but an inflatable dinghy??? Sure it would - have I just invented a new sport??? Or maybe wedge yourself into a dougnut type inflatable???
i hate to burst your buble , but you're not the first to get a simular idea. people do all kinds of things with kites. a big enough kite could even tow a mid-size sail boat.
check out http://www.kitefilm.com and their "Outrigger canoe-kiting on Maui"
film ( http://www.kitefilm.com/grafikk/cover_canofilm.jpg )

a rib could definitely be towed - the question is: could it tow it upwind? and will it be stable enough?
__________________

__________________
vpolonsk is offline   Reply With Quote
Old 19 June 2005, 22:16   #22
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by vpolonsk
i hate to burst your buble , but you're not the first to get a simular idea. people do all kinds of things with kites. a big enough kite could even tow a mid-size sail boat.
check out http://www.kitefilm.com and their "Outrigger canoe-kiting on Maui"
film ( http://www.kitefilm.com/grafikk/cover_canofilm.jpg )

a rib could definitely be towed - the question is: could it tow it upwind? and will it be stable enough?
A big enough kite??? Thought they were called spinnakers!!!!!


As to towing a rib - we will see........
__________________

__________________
codprawn is offline   Reply With Quote
Old 19 June 2005, 22:35   #23
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by codprawn
A big enough kite??? Thought they were called spinnakers!!!!!


As to towing a rib - we will see........
kites and spinnakers (sails) have totally different aerodynamics. check out the links..
also can search for kiteforum.com for any questions.
__________________
vpolonsk is offline   Reply With Quote
Old 20 June 2005, 02:56   #24
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by prairie tuber
Polyurethane perhaps? I was told PVC sometime ago. See the other thread on hypalon, PVC & polyurethane.

read a bunch of threads from this forum about materials.
this US Navy paper looks very legid and it recommends to switch from hypalone to urethane:
http://www.wing.com/PUvHYPE%204.13.05.pdf

what is your research based on?
__________________
vpolonsk is offline   Reply With Quote
Old 20 June 2005, 03:05   #25
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by codprawn
A big enough kite??? Thought they were called spinnakers!!!!!
by the way, kite used in this video is 50 square meters: http://www.kitefilm.com/grafikk/cover_canofilm.jpg

i guess this compares to sizes of spinnakers . however, when you fly a kite you generate enormous amount of power by moving it around.

i bet you, you can even get a 3 meter foil stunt kite and get going in 15-20 knots on a RIB.. doubt you'd be able to go upwind though.

if you get a 16 meter LEI (inflatable) kite, you can probably go upwind just by using an oar to edge. i would be concerned about the stability of the RIB in this case (dont know much about it yet). once i get my RIB, i'll try it out and let you know.. one thing is for sure - this will never be more fun then kitesurfing.
__________________
vpolonsk is offline   Reply With Quote
Old 20 June 2005, 09:56   #26
Member
 
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
Quote:
Originally Posted by vpolonsk
read a bunch of threads from this forum about materials.
this US Navy paper looks very legid and it recommends to switch from hypalone to urethane:
http://www.wing.com/PUvHYPE%204.13.05.pdf

what is your research based on?

That study is now over 12 years old and the recommendation of PU was based partly because of greater abrasion resistance, partly because of a quicker adhesive curing time, but mainly because of greater puncture resistance of PU. The U.S navy could have easily specified PU for all of their combat rubber raiding crafts (CCRCs) which are hypalon futura 470 commandos made by Zodiac, but they didn't. Why? - I don't know, but this is what I do know;

a) A new bullet proofing technology known as 'armorflate' can be used in conjuction with hypalon, it is far more puncture proof than PU.

b) While PU adhesives may cure quicker, they also crystalize and break down far quicker.

c) The worlds two foremost retubing outfits, Paul Tilley and Olmtec tubing, overwhelming recommend hypalon for retubing. Paul Tilley has stated that neither PVC or PU have even close to the life expectancy of hypalon (see this thread PU or Hyperlon Tubes which to go for? ). Paul has dealt extensively with all 3 materials and won't even warranty work done on PVC or PU.

d) There are Hypalon watercraft built during WWII that are still in use in BC.
__________________
prairie tuber is offline   Reply With Quote
Old 20 June 2005, 12:52   #27
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by codprawn
As to towing a rib - we will see........

here you go:

http://kitesurfingschool.org/faqs.ht...ith%20a%20boat
__________________
vpolonsk is offline   Reply With Quote
Old 20 June 2005, 16:38   #28
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by vpolonsk
Very interesting - thanks!!!
__________________
codprawn is offline   Reply With Quote
Old 20 June 2005, 22:51   #29
Member
 
Country: USA
Town: NJ
Length: no boat
Join Date: Jun 2005
Posts: 13
Quote:
Originally Posted by prairie tuber
That study is now over 12 years old and the recommendation of PU was based partly because of greater abrasion resistance, partly because of a quicker adhesive curing time, but mainly because of greater puncture resistance of PU. The U.S navy could have easily specified PU for all of their combat rubber raiding crafts (CCRCs) which are hypalon futura 470 commandos made by Zodiac, but they didn't. Why? - I don't know, but this is what I do know;

a) A new bullet proofing technology known as 'armorflate' can be used in conjuction with hypalon, it is far more puncture proof than PU.

b) While PU adhesives may cure quicker, they also crystalize and break down far quicker.

c) The worlds two foremost retubing outfits, Paul Tilley and Olmtec tubing, overwhelming recommend hypalon for retubing. Paul Tilley has stated that neither PVC or PU have even close to the life expectancy of hypalon (see this thread PU or Hyperlon Tubes which to go for? ). Paul has dealt extensively with all 3 materials and won't even warranty work done on PVC or PU.

d) There are Hypalon watercraft built during WWII that are still in use in BC.

hmm.. i've been seeing a lot of contradicting statements regarding this topic now..
http://www.cimarineusa.com/index.htm these guys claim to be building hypalon boats in 2006, but i need one now ..

but so far i havent found any DUX type boats made with hypalon.. everything is made with PVC or PU.
__________________
vpolonsk is offline   Reply With Quote
Old 21 June 2005, 02:38   #30
Member
 
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
I definitely would avoid PVC, as for PU, you're right there are differing opinions, enough to make me pretty leery of it. If DUX offered a hypalon option, I'd be quite interested in the PD550. I recieve this email response from Les at Xtreme inflatables today:


"We are planning to implement Hypalon boats, and have some prototypes in the works, currently all boats for sale are PVC. Initially we will likely only produce the Xtreme XL or Cat models in Hypalon, as they account for the majority of our sales. An XL460 is $4,060 in PVC, and will be around $5,500 in Hypalon version. We do plan on an 18' Hypalon and PVC boat, probably available in the spring of 2006. Exact specifications and pricing are yet to be finalized.

Thank you,
Les Valsquier
C.I. Marine USA, Inc.
3409 McDougall Ave.
Everett, WA 98201
www.cimarineusa.com
lesv@cimarineusa.com
Office: 425.252.4089
Fax : 425.252.5111
Cell: 425.971.4999"


One more idea - You might be able to pickup a used US Navy CCRC (4.7m zodiac futura hull with 1800 decitex hypalon) through a government auction for about a fifth of what they would go for new. Those things are extremely well built (very different from zodiac's recreational futuras in terms of durability).

Good luck,

Mark
__________________

__________________
prairie tuber is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:29.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.