has anyone thought of putting trim tabs on the tail of a sailboard much like a speedboat to adjust the attitude of the whole board? what about a rigid jib that is pre-tensioned to
adjust to wind angles..what about getting back that old idea of pumping air into a board to a certain p.s.i. to determine the volume i think Doyle was the inventor of that but never took off..what about ballast? sliding lead weights or water inside the board to and from the length of the board to get the exact equilibrium at speed and chop..drag reducing components like teardrop shaped masts like the hobies..all the companies are thinking of refining sail design and aesthetics so much so the board makers but if one company just think of the rig as a whole and experiment with not just say the fin am sure a few more kts. is easy done than said..look at the french they think of the contraption as a whole and they always break records...just something i'd like to daydream about

jp747 said...

has anyone thought of putting trim tabs on the tail of a sailboard much like a speedboat to adjust the attitude of the whole board? what about a rigid jib that is pre-tensioned to
adjust to wind angles..what about getting back that old idea of pumping air into a board to a certain p.s.i. to determine the volume i think Doyle was the inventor of that but never took off..what about ballast? sliding lead weights or water inside the board to and from the length of the board to get the exact equilibrium at speed and chop..drag reducing components like teardrop shaped masts like the hobies..all the companies are thinking of refining sail design and aesthetics so much so the board makers but if one company just think of the rig as a whole and experiment with not just say the fin am sure a few more kts. is easy done than said..look at the french they think of the contraption as a whole and they always break records...just something i'd like to daydream about

No wind over there for a while, huh? you sitting around the house with the wife and sundry driving you nuts or, either that your parked under that great big tree, sinking frosties and its getting a tad hot

how about a solar powerd turbine airfoil made from computor fans carbon&divinicell, thats if you can get any, theres a world shortage of carbon because decrepit has restocked
A turbine blade for an axial-flow turbine includes an intrados generating a positive pressure, and an extrados generating a negative pressure, wherein the intrados and the extrados are provided between a leading edge and a trailing edge. An inflection point is provided between a concave portion on an upstream side and a convex portion on a downstream side in a region extending from a position of 80% on the intrados to a rear throat, and the length of a normal line drawn downwards from the intrados of one of the turbine blades to an extrados of the other turbine blade has at least one maximum value in a region extending from a front throat of the one turbine blade to a rear throat. Thus, it is possible to disperse a shock wave generated from the intrados at the trailing edge

How about sailing in a river that flows downhill???? Can't go wrong!

DavMen said...

Wet Willy said...

How about sailing in a river that flows downhill???? Can't go wrong!

Yep.
Yet to see an uphill following river.

Is you trying to be clever?

I meant a river flowing down, like, a really really steep hill. Maybe over a bridge. Yeah, that's it, a river flowing over a bridge! Like the Sydney Harbour bridge. Is there a river there? Could it be diverted to flow over the bridge?

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

graceman said...

My F2 SX has trim tabs in the PIPES
Does that count?

is it trimable at different sea states and speeds thoughf2 should have thought farther by making "foot pressure actuator pads" to adjust the trim just like a throttleman does in
offshore powerboat racing..kinda expensive for a boardmaker for the masses though

landyacht said...

jp747 said...
..drag reducing components like teardrop shaped masts like the hobies..

Niel Pryde tried glass wing masts way back in the mid 80's. ( I have been doing this thing for a long time too)I do recall reading a review at the time. they found that they were great for cruising.
Then along came bigger pockets,and cams..
I suspect the sail designers are too busy trying to make the sails look new and trendy. I think I have seen a latest design with a SPIDERMAN theme. would go well with your pyjamas when you get home after a big day wave sailing,and mummy cooks you a nice dinner.
with the materials you guys have at hand , Im amazed at how SLOW relative to windspeed sailboards are going. I once wrote that you are using the materials that are being used to build the next generation of supersonic fighters,but you are building BLERIOT monoplanes. I still think that is accurate.
Sorry if I added a serious comment

Wet Willy said...

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

Plenty of air time though

Wet Willy said...

DavMen said...

Wet Willy said...

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

Plenty of air time though

Nobody goes over the falls deliberately

That's not true!

nobody said...

Wet Willy said...

DavMen said...

Wet Willy said...

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

Plenty of air time though

Nobody goes over the falls deliberately

That's not true!

I love these quote boxes.

shear tip said...

nobody said...

Wet Willy said...

DavMen said...

Wet Willy said...

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

Plenty of air time though

Nobody goes over the falls deliberately

That's not true!

I love these quote boxes.

If you stare into the middle one for long enough, a monkey comes out and pisses on your keyboard

stribo said...

Yes but landyacht sailbaords are dealing with two elements.Wind and water...
The wheel has been around since the dawn of time.Thats a long time to perfect something that is ...simply...round... If you held your towel up on a land yacht you could beat water speeds.
You can't compare landsailing speeds to water sailing speeds , if thats what your getting at.
I think some of the finest engineers spent three million bucks on a thing called "Yellow Pages " only to be beaten by a windsurfer.. Sooo i don't think we're doing too badly.

but you want to sail faster in lighter winds,just like Yellow Pages dont you?
form reading about yellow pages / Maquarie Innovations. they are designed to sail in an optimum wind of 25knts. in that wind they are aproaching the theoretical max. to be beaten by a sailboard by a knot or 2 in almost double the wind ie not much more than wind speed, and kites in much the same . . that must be very frustrating for them. I'm guessing that at 25knts the best speed sailboarders are thinking of setting up ,not packing up.
last spring we finally managed to get sailing Data for VINDICATOR that included wind speed at the same time as yacht speed. the one day that we got data was not very goodfor wind , but in 20kph wind Bill Finch managed 124.4kph, just over 6xwindspeed. All the theoretical data I have read says that we should be able to reach 5.5 times windspeed, so we are happy because VINDI is desined for 40-50kph winds.
Since the thread is "going faster in lighter winds" think about this when your wing gets a double skin you significantly increase your power/speed/controlability........ Sailboarding materials are well up to that task.
Us lazy landsailors only have to worry about the ideal wheel diameter/width.tread pattern/compound hardness/balancing/tyre wear/expansion during acceleration.
Surface conditions may change during the day
having sorted that out, you need the right axle flex for the surface on the day. given Aerodynamics really starts to be important after 100kph. you need to get rid of every bit of drag.
then there is wing twist and the ever present problems ,seeing where your going,not hitting anything and stopping. Absolutely nothing that resembles a brake . If you reverse the wing to fastto slow down the front lifts off like a jet taking off

Wet Willy said...

Leech said...

shear tip said...

nobody said...

Wet Willy said...

DavMen said...

Wet Willy said...

DavMen said...

Wet Willy said...
I meant a river flowing down, like, a really really steep hill.

I think thats called a waterfall

Too steep.

Plenty of air time though

Nobody goes over the falls deliberately

That's not true!

I love these quote boxes.

If you stare into the middle one for long enough, a monkey comes out and pisses on your keyboard

I'm trying but all I see is...WAIT! THERE IT GOES! Cheeky monkey!

Hey!! Damned Monkey!!