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All Forums >  Land Yacht Sailing >  Blokarts >  getting top speed
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bryan

WA
Australia


37 Posts

Posted 24/06/2010, 11:30 am        Report  Show Profile  Reply with Quote
I've been blokarting for about 5 years now and have sailed in some very strong winds on Lake Lefroy.Using a 2m sail,ultra carbon mast, gps, and fitting a Pod I have not yet hit 80 kph.Can go sideways on 2 wheels at 65-70 kph which makes for fun sailing, but I want to get some higher speed, Im 84 kgs, would ballasting the yacht with sand bags improve my speed?

Gizmo


SA
Australia


1650 Posts

Posted 24/06/2010, 4:37 pm        Report  Show Profile  Reply with Quote
I would think you have reached the "maximum" speed you can get in that configuration. The thing that's holding you back is aerodynamic drag, take a drive in the car and put your arm out the window at 80kmh and see how much air drag you have.....
To get more speed you need to get the airflow cleaner, things like a Lycra suit might help just a little bit, try a sailcloth skin from the pod to your shoulders/ backrest with just your head out. Think S-M-O-O-T-H AIRFLOW...............
The extra weight in the way of ballast would probably be a negative if your after speed.
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landyacht


WA
Australia


3881 Posts

Posted 24/06/2010, 8:26 pm        Report  Show Profile  Reply with Quote
that same configuration on ivanpah and yeppoon is good for 100kph + you have a couple of things against you.
you need to put on 10kgs
you need to sail in stronger winds
you need to do all these things on really dry, slightly rough, but almost smooth salt.
you need to do this in the morning before the salt heats up and gets damp, ie as soon as the big wind comes in
this would involve getting out of your comfy swag as soon as the wind starts ( sunrise). 9.00am get ups and a feed just dont cut it
finally lots of practice reaching and broad reaching. alot of blokarters tend to bear off to far downwind to really get the max speed from thier yachts.
i think this is because the softer mast on the production models , coupled with the style of sheeting allows a blowie to sail well more downwind.
great for beaches, and beginners , but not so good for speed

Broken Mast


QLD
Australia


32 Posts

Posted 28/06/2010, 10:19 pm        Report  Show Profile  Reply with Quote
Whilst the fastest I've ever been with a GPS on board is mid 70's, (in a production blokart with a glass mast and 4.0 metre sail and borrowed GPS) I know I can achieve in excess of 80 km. I now run a performance Blokart with carbon only in three sections on the 4.0 and two sections on the 3.0. I find this configuration of sail and mast suits my sailing style better and allows me a higher max speed.

Airflow and resistance are everything. I find that when I keep as low a profile as possible and sheet accordingly, even when others are hanging out of their blokart trying to keep all three wheels on the ground I usually make ground and pass if behind. This especially applies on a production blokart. With the performance kart it is probably more important given that the purpose of the POD is to aid aerodynamics and hanging out the side of it certainly doesn't help drag.

I recently flew, and I mean flew past one of our members who was clocking 69.4km on his GPS at the time. Both of us on 3.0 and he had a full carbon mast.

I don't know if any of this help and I certainly don't know the ins and outs of sailing or it's terminology but I do know that when I sheet my sail just right I can go like all hell. And Landyacht, not just downwind. I in fact find that I make the best time up on the competition when sailing upwind.

There are guys in our club who exceed 80 km on a regular basis in good winds.

P.S. I weigh 85 kg.




Hiko


New Zealand


742 Posts

Posted 29/06/2010, 6:01 am        Report  Show Profile  Reply with Quote
It would seem to me that you have good sailing skills and that is what is doing it for you
Good skills equals fast yacht
When my class 5 gets in the groove it goes like hell but unfortunately I cannot get it there like some of the better sailers I sail with
Swapping yachts has proved this to me as does seeing the results of
one class racing everywhere
Cheers
Hiko

Clemco



New Zealand


300 Posts

Posted 30/06/2010, 6:03 pm        Report  Show Profile  Reply with Quote
bryan said...

I've been blokarting for about 5 years now and have sailed in some very strong winds on Lake Lefroy.Using a 2m sail,ultra carbon mast, gps, and fitting a Pod I have not yet hit 80 kph.Can go sideways on 2 wheels at 65-70 kph which makes for fun sailing, but I want to get some higher speed, Im 84 kgs, would ballasting the yacht with sand bags improve my speed?


Hi Bryan, Yes adding ballast is one answer, but you would have to sail in 45-50 kts wind to get a better result. Very unpleasant sailing conditions in my opinion. Im afraid Bryan you may have out grown the Blokart experience and need to progress into a higher performing class of landyacht. There are plenty of options available. It all depends on... how fast do you want to sail?

landyacht


WA
Australia


3881 Posts

Posted 30/06/2010, 7:09 pm        Report  Show Profile  Reply with Quote
Hiko said...


When my class 5 gets in the groove it goes like hell but unfortunately I cannot get it there like some of the better sailers I sail with
Swapping yachts has proved this to me as does seeing the results of
one class racing everywhere
Cheers
Hiko

ditto that hiko
One day after a good sail in Vindicator, I let crazy trav have a go
first time in a yacht bigger than CL5, first time with a solid wing, and he came back from his first sail having clocked 2.5kph faster than my best speed on the day

   
All Forums >  Land Yacht Sailing >  Blokarts >  getting top speed


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