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with improved rudder mounts/plastic floor/board connectors/taller mast and seats
hydrocat sits on the beach after a days testing ,the redesigns worked even better than i had hoped
as you can see from the pic ,there was a good wind blowing , 12 to 20 knots which was great fun
there is a sailing club for begginners about 500 yards from this spot , and thier sails are exactly the same colour as this lodey 6 mtr sail , they all kept close to the beach. so it was quite amusing to me when one of the instructors came racing out to me on a jetski , thinking that i was one of thier smaller craft - hahaa
The first test - i had know idea how it would behave
so i picked a day with fairly light winds to help me understand what it was doing
as you can see from the vid,this is the before the redesign.
after redesigning hydrocat,i took it out on a late evening tide
the vid quality is mobile phone - but as you can see it is working well in light winds
The next vid will be of full speed setup
in stronger wind conditions (coming soon)
there,s some video
here
video of the second test (after design improvements) here
both tacks ,jybe ,reach,broad reach,and every angle i could go
upwind,,downwind ,were all completed satisfactory
HYDROCAT
with redesigned rudder mounts,board connectors,plastic floor,seat,and taller mast
Speed test - kayak with V sail
Wind --gusting--18 to 25 knots
waves -- i waited for the tide to drop till wave height was 1 ft,,water depth less than 3 ft
With the wind strength increasing and wave height at acceptable levels i popped the v sail up
the kayak took off rather more quickly than i thought it would,wonderful pulls of acceleration in the gusts
the odd touch of my paddle skimming for stability it was great to see two sheets of water flying from the bow
the sharp front of my valley nordkapp sea kayak cut through the bigger waves with ease
the sail was making some funny creaks and groans-and at one point i thought the lines were going to snap
but they held,,and i got my first taste of how the hull reacts above 12 knots
a look at the gps counter recorded 13 knots as a best--although it was a bit scary with no outriggers
ok-the warm weather is here and i can order the epoxy and fibreglass for the float build--i have 8 different size windsurfer sails to test with..it is great being out on the water testing this equipment in different configurations and conditions
some video of calmer conditions
A trip to leigh on sea,,twas a nice and sunny day
very strong aluminium angle stress frame
and rear t foil support section-a more accurate drawing will follow as the design evolves
i managed to get 3 windsurfers from ebay for 25 pounds,with 5 masts,6 booms,8 sails and 4 drop skeggs
and a bag full of bits including mast extension and connectors/harness/spare fins/and other stuff--luck really
1 . 2 and 3 sail combinations will be tried out this summer-with me wearing upper body protection/lifejacket
i will cover all hard and nasty surfaces -so i do not injure myself-when the inevitable capsize/pitchpole occurs
1/10/2009 i will update this site as the build progresses
So why am i turning a 17 ft (valley--nordkapp) sea kayak
into a trimaran,why not just buy a boat- -the short answer to that is
i wanted to build something that was faster than the hobie adventure island
My father built two planning speed boats in the back yard back in the 70.s
but it was summer 2009 that had its effect on me
my son came home one day looked up at me and said DAD!!.
At this point my hand automatically felt for any loose change in my pocket.
iv,e just been out on my friends inflatable kayak.somewhat relieved and surprised i asked him
if he enjoyed it and,was he wearing a buoyancy aid or lifejacket. IT WAS AMAZING came the reply.
His enthusiasm and non stop talking for the next twenty minuets revealed a passion in him for sailing,kayaking,canoeing.Ok im,e off down the park (front door slam) . i think i stood there for a couple of minuets just taking in what he had said andit slowly dawned on me that something had sparked in my mind.
The next day saw me trawling the internet in search of inflatable kayaks, i soon realised i wanted one NOW !!so i walked round the corner to the boat shop on the seafront and as luck would have it,they had one ,and it was a good one.A two seat spree 2 ,by stearns.After some impatient opening of the box and some pumping we
were good to go,so with me one end and my son the other,we walked it over to the beach,.a quick shove and of we went,only mildly aware of all the onlookers on the beach,And he was right about kayaking being fantastic,its so peaceful and at the same time exiting ,After weeks of thorough enjoyment,my appetite for this sport was well and truly wetted (excuse the pun)
So there i am again on the wibbly wobbly web (ebay) when i spot a 17 foot sea kayak,a valley nordkapp
and after much bidding and finger biting i find myself driving down to hampshire to pick it up
and enjoying the rest of the summer in a great looking kayak
What happens next is what this site is about
and here she is before the work starts
Long slim and very fast-the valley nordkapp (north cape)
its an early nordkapp HM,the back has been modified for the rudder upgrade
if you are thinking of doing something like this, safe distribution of loads must be top priority
sails can generate huge forces,these forces must be transmitted into forward motion through your craft
these loads would snap this kayak like a twig,so the loads will be taken up by a strong aluminium frame
attached to this frame will be the skeggs and rudder-and eventually hydrofoils and hydrofoil rudder
with the strengthened kayak acting only as buoyancy
1. fibreglass boats are easier to work on,repair,and fix things to
but will need to be strengthened to cope with the higher speeds
polyethelene kayaks are much stronger,but will still need some strength added
2.A longer boat will be more stable and except more sail area
3.try to spend as little as possible on your chosen craft,it makes drilling holes in it less painfull
4.my sail/outriggers/and floats will all be detachable for easy transportation and fast set up
and because i will also be using the kayak on its own
my budget for this build including the kayak is 350 english pounds.
incredibly i am still well under this at 248 pounds
i still have the hydrofoils and streamlined floats to build,but i am doing all the work myself.
buying a dedicated carbon fibre craft may well happen for 2011
of course you can go out and buy a kayak trimaran off the shelf
like the hobie adventure island/if you have three thousand pounds knocking about in your biscuit tin
but i dont , plus i want to go faster than 12 knots and be able to add more sail if needed
so if this floats your boat (heh) click on ,building the kayakamarans parts, on the navigator on the right and check out the pages in that folder,
----------------------------------------
The uk has a wealth of coastline to experience
its waiting for you,,the right clothing will keep you warm as toast
and some friends,a nice fire,and food on the beach will wake your spirit
just do it
after it is built and tested i will be building three hydrofoils that will bolt onto the aluminium outrig arms
with a rudder T hydrofoil at the stern
this kayak handled everything i threw at it last summer and never tried to dunk me
somebody was foolish enough to tell me i was not experienced enough after 2 months
to be going out to far having never been in a kayak before
so i thought i would row to kent -just me- find a beach - and put a tent up for the night
7 kilometers to the other side
i launched from southend sea life centre
had to wait at the shipping lane for a huge ferry to pass
luckily he spotted me and slowed a bit to reduce the bow wave
if they dont,,you have to point the kayak at the approaching wave and ride it
the two holds contained/tent,food,water,sleeping bag,lights,portable stove,
tea sugar milk,and chocolate,and a dry bag with torches/mobile phone/radio etc
there was plenty of fish around and the water quality looked good
keeping a close watch on the environment is good practice
i found a sandy half moon shaped beach,put the tent up and gathered some firewood
once the fire was going i changed out of the wetsuit into some warm clothes and contemplated the view
over to southend on sea with a huge mug of tea,and some chocolate,the tranquility was astounding.
The large stones i placed around the fire were placed inside the tent on some dry seaweed
they served as exellent heaters during the night
in the morning i was rewarded with a southerly wind when it was time to depart
the blue v sail on the front of the kayak took me back to southend with a nice 5 knot breeze
i stowed the paddle,sat back and finished off the rest of the food,rolled a couple of smokes
enjoying the morning sun ,my feet steering the rudder
wonderful
next time i will be catching some fish and cooking them on the beach
i have been so busy searching for 2nd hand parts,and calculating stress and sail loads
so much to think about regarding safe operation,and recovery in the event of a failure
i now have the two 7.6 metre sails-and they look bloody big-have had to increase the beam slightly
the other 6 sails are smaller so i will test with them first.
the local lazer class and c class guys will probably be laughing-
until i sheet in the sails
i will be building dedicated streamlined floats
but i am also going to try out the windsurfer boards as they have lots of buoyancy and have the ability to plane
as i have three w/surfer boards i will also build a skeleton T frame with no kayak -its all good
G'day from New Zealand. I've just signed on to this site after finding your site details on youtube. Ive been sailing my old Albatross with a spinnaker of 4 sq mtr in winds from 10-25 knts, sometimes on the edge but generally much safer down wind with following 2mtr + waves with plenty of power to maintain speed and control. Ive been working on designs for many years and have three cnc machined and shaped/fared which are now having molds made. Hope to have some kayaks on the water for speed testing before Christmas. Two designs are sit on and one is sit in expedition. I have designs for out riggers but not really needed for down wind and unsure how the might survive big sea and submarining at 20 kph sometimes 30 surfing rolled out swells.
I also have designs for mainsail and jib sail using wind surf mast and adapting windsurf sail. That's a big rig and requires a full tri outrigger design with hike out seating. All done in carbon fiber. Big expense. My budget is currently about $25 grand and having the molds made and finished kayaks by a manufacturer who are keen on my designs. My concept is a modular system that starts with a purpose design kayak that is great on its own but can be sailed with spinnaker and outriggers added if required.
Anyway best of luck with your project. I think the foil system is great fun to do but maybe not totally practical from a rough water expedition or fishing trip. I think you must design a kayak for general use that the market place want's and then make add-ons for the sailing foil fun. The sailing part gets more expensive particularly with carbon fibre to keep the weight down.
The best fun is design and seeing a beautiful boat materialise. It's a worry though when one learns as we go. Just hope my kayaks float the right way up!!!
Cheers
Duncan
speed test with V sail..
Wind--18 knots
waves-- i waited for the tide to drop till wave height was 1 to 2 ft
With the wind strength increasing and wave height at acceptable levels i popped the v sail up
and the kayak took off rather more quickly than i thought it would,with wonderful pulls of acceleration in the gusts
with the odd touch of my paddle skimming for stability it was great to see two sheets of water flying from the bow
the sharp front of my valley nordkapp sea kayak cut through the bigger waves with ease
the sail was making some funny creaks and groans-and at one point i thought the lines were going to snap
but they held,,and i got my first taste of how the hull reacts above 12 knots
a look at the gps counter recorded 13 knots as a best--although it was a bit scary with no outriggers
ok-the warm weather is here and i can order the epoxy and fibreglass for the float build--i have 8 different size windsurfer sails to test with--im,e very exited now
southend on sea has a wonderful expanse of water with kent visible in the distance 7 kilometers away
i wanted to see how the hull would react over 10 knots
under sail.,The V sail that i built is much larger than those on the market,and great care is needed when the wind is above 10 knots..but it is fast and can be shaped to the wind-by pulling the lines
its amazing what you can do with some overflow pipe
and a beach tent,and some bits n bobs,
haha,,it still has the tent lines on,although i may change this
for something more substantial
The V sail is much bigger than those on the market,,made by cutting out the back of a beach tent
just unclip and the bungees pull the sail into the upright position
and by pulling down one side i can sail 45 degrees into the wind-cost--5 pounds- to have some stitching done
when the tide gets lower it leaves a channel with sandbanks on either side just off of leigh on sea
good wind with little wave friction-it is a perfect spot for testing but the current is more than 1 knot by the time the tide gets this low-so somewhere else when everything is tested and fine tuned
Playing the saxophone and keyboards is also one of my passions
Crossbow was the first sailboat to break 30 knots.built and sailed by tim coleman.Crossbow 2,s best measured speed was 36.0 kts, in 1980, the last year she sailed.
Longshot became the first sailboat to break 40 knots by setting a new record of 41.89 knots on March 16, 1992.
"Longshot",built by dan and greg ketterman,and owned and sailed by Russell Long ,demonstrated just how good self regulating hydrofoils can be and went on to set the Class A record of 43.55 knots on a 500 meter course in Tarrifa Spain in 1993.
Sailrocket captured the B-class world record with a recorded speed of 47.36kn.-and attained a top speed of 52.26kn.at walvis bay,namibia
Throwing shed loads of cash at the attempt is one way
But showing passion and never giving up after set backs is what paul larson and team sailrocket are about
Even after the huge backflip crash and a bruised head-paul was right there bailing the water out--nuff said
The french hydropter team (with their shed loads of cash) currently hold the speed record of 51.36 knots
i may not be albert einstein but trying to get the record on big waves seems an unnecessary risk
im,e just kidding guys
i have huge respect for anyone attempting the speed record
no one has told me it cant be done sitting in a kayak--which is good-cause i believe it can
Comments (5)
2020 said
at 2:47 pm on Dec 18, 2009
wow...
a blog may be good too
for me to be kept up to date :)
good luck
Radian said
at 2:54 am on Mar 3, 2010
yea-i will start a blog
i have been so busy searching for 2nd hand parts,and calculating stress and sail loads
so much to think about regarding safe operation,and recovery in the event of a failure
i now have the two 7.6 metre sails-and they look bloody big-have had to increase the beam slightly
the other 6 sails are smaller so i will test with them first.
the local lazer class and c class guys will probably be laughing-
until i sheet in the sails
i will be building dedicated streamlined floats
but i am also going to try out the windsurfer boards as they have lots of buoyancy and have the ability to plane
as i have three w/surfer boards i will also build a skeleton T frame with no kayak -its all good
Duncan White said
at 7:15 am on Apr 15, 2010
G'day from New Zealand. I've just signed on to this site after finding your site details on youtube. Ive been sailing my old Albatross with a spinnaker of 4 sq mtr in winds from 10-25 knts, sometimes on the edge but generally much safer down wind with following 2mtr + waves with plenty of power to maintain speed and control. Ive been working on designs for many years and have three cnc machined and shaped/fared which are now having molds made. Hope to have some kayaks on the water for speed testing before Christmas. Two designs are sit on and one is sit in expedition. I have designs for out riggers but not really needed for down wind and unsure how the might survive big sea and submarining at 20 kph sometimes 30 surfing rolled out swells.
I also have designs for mainsail and jib sail using wind surf mast and adapting windsurf sail. That's a big rig and requires a full tri outrigger design with hike out seating. All done in carbon fiber. Big expense. My budget is currently about $25 grand and having the molds made and finished kayaks by a manufacturer who are keen on my designs. My concept is a modular system that starts with a purpose design kayak that is great on its own but can be sailed with spinnaker and outriggers added if required.
Anyway best of luck with your project. I think the foil system is great fun to do but maybe not totally practical from a rough water expedition or fishing trip. I think you must design a kayak for general use that the market place want's and then make add-ons for the sailing foil fun. The sailing part gets more expensive particularly with carbon fibre to keep the weight down.
The best fun is design and seeing a beautiful boat materialise. It's a worry though when one learns as we go. Just hope my kayaks float the right way up!!!
Cheers
Duncan
Radian said
at 4:08 pm on Apr 20, 2010
speed test with V sail..
Wind--18 knots
waves-- i waited for the tide to drop till wave height was 1 to 2 ft
With the wind strength increasing and wave height at acceptable levels i popped the v sail up
and the kayak took off rather more quickly than i thought it would,with wonderful pulls of acceleration in the gusts
with the odd touch of my paddle skimming for stability it was great to see two sheets of water flying from the bow
the sharp front of my valley nordkapp sea kayak cut through the bigger waves with ease
the sail was making some funny creaks and groans-and at one point i thought the lines were going to snap
but they held,,and i got my first taste of how the hull reacts above 12 knots
a look at the gps counter recorded 13 knots as a best--although it was a bit scary with no outriggers
ok-the warm weather is here and i can order the epoxy and fibreglass for the float build--i have 8 different size windsurfer sails to test with--im,e very exited now
peterrobin said
at 9:40 am on Sep 9, 2010
Its nice...........
http://nasa-spacestation-shuttle.blogspot.com/
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