Ron, Yes, welcome to our world. How fast do you want to sail? And how long is that runway?

Nikrum said...

( Damn I Kill me!)

Do you wish some one would
I am sure it could be arranged

Oops! I think I may have upset Clemco. Offering death like that
I thought Giz and Hik would have had more reason.

Seriously though. That "C.A. Marchaj Aero-Hydrodynamics of sailing" Must be good it has a lovely picture of a Yacht on it and it costs a lot of money and I am not a member of a library. I guess I will have to take your word for it but I will say Damn! It certainly feel way more than 1HP.

As for how fast do I want to go.. Let us not get too far ahead of ourselves Clemco, we will just go ahead in increments another 20kmph is the next increment 10 at a pinch.
The Tarmac section is about 100mtrs long by about 40mtrs wide with a row of Blue Metal on it now. I was probably milking it to get 80.2kmph out of the Razor and Chain Mesh looks Awful big when you are charging towards it at that speed

I am not one to Exaggerate greatly about stuff, yes i may brag at times but I do try to keep to the facts. I can not get past the surging acceleration of Land Yachts. It would also be lovely to have a digital Video Cam to mount on the Razor to show some of what is happening as you guys are starting me in to doubting my own senses. I have an Anemometer and a Bicycle Computer which can be set to actual wheel diameter and to day I purchased a meter and a half of lovely Bright Red Cloth to make a local Windsock. Why I have these things I do not quite understand as I was only doing this for a bit of fun and not competitively
Oh By The Way! Gizmo. The Bloke in the Picture------Ah!--------Was he into Land Yachting as well
Ron

If you had a recording wind speed/direction meter on your landyacht as well as GPS set to record direction and speed over distance and time you should then be able to calculate acceleration and also hp/kilowatts given you already know the weight of your yacht and you combined

Today I will run the ute down the Tarmac and across it and post the results so that you may have a more accurate guess.
It may well sound incredible to gain 80k on a short stretch but this is what I was refering to as surging power/Speed and like I said the Chain Mesh and 8' high security Fence was looking like a 20' High Pig Mesh Fence Maybe a little exaggerated there but it did look horrible close when a Bottled it and turned away and at that speed it was with squealing tires and wondering if I would hit it or not I doubt that I would try to crack the ton on it as the Razor might well carry us side ways into the fence. Regarding my claims as to how close to the wind I was getting. I can only go on what I am seeing and if I were
Running directly down the strip and a Windsock 500mtrs away is not far off that axis then I can only go by the info few in. However I must also say that there are a couple of buildings close by and there may be some effect from wind deflection and perhaps compression prior to the deflection again I will post some pic's of the area. Damn! I really need someone more experienced to sail the Razor to the Max' while I take the necessary readings. One of these days I am going to go over to Strahan and go for it on the Ocean Beach.

Ron

aus715 said...

OK, so the load going through the mast step of a Blokart would be what do you think?

Aus 517,
Not much! that type set up with solid struts going back from fairly low on the mast to the ends of the axles and no forestay transfers loads totally differently from a wire stayed rig. It works fine on yachts with really light frames like US Mantas.

When I tried wire stays on a Manta-like set up with 1.5 x .056 wall aluminum tubes in the main frame, I got a serious shock when I tried to tip the boat over to work on the bottom. I pulled on one of the side stays to capsize the yacht and it didn't even lift the opposite wheel it just slammed the frame under the mast right down to the ground

Nikrum said...

Regarding my claims as to how close to the wind I was getting. I can only go on what I am seeing and if I were
Running directly down the strip and a Windsock 500mtrs away is not far off that axis then I can only go by the info few in. Ron

Perhaps we have a mis-interpretation here, are you talking about 10 degrees going into the wind, or away from?

Now we are getting somewhere. Cisco you have just opened my eyes. Hot Mix/Tarmac is the key to what is happening. Low Rolling resistance, High Tire pressure etc is allowing the Razor to Roll faster, quicker and is easier to draw up wind than on Sand which will give a significantly higher rolling resistance. That is what Happened on Somerset Beach a couple of days ago. The Razor refused to move forward up wind and the tires, as wide as they are, settled into the Beach surface.

As I have already stated I try not to Exaggerate/Bull S**t in matters of National Import' . I was having serious doubts about the things that were apparently occurring. Thanks. It is a pity that my Estimate was so far out but it is corrected now (Re Strip Length) Even so 200mtrs is not long enough to go for the Ton and still make the turn.
I hope that some of you Lads have access to a goodly strip of Concrete or Tarmac to prove possibilities. Now a Disused Airstrip would be perfectly.. I hope they shut Wynyard Airport[}:)][}:)][}:)]

Kiwi307; Upwind!
(Down Wind or Across Wind (To Left/Port or To Right/Starboard) Terms, terms terms.[}:)]
Ron

Nikrum said...

Now we are getting somewhere. Cisco you have just opened my eyes. Hot Mix/Tarmac is the key to what is happening.

Hot Mix Tarmac. I dream of owning a square mile of it, dead level with high wind exposure.

Gizmo said...

SALT is the answer..... smooth, hard, flat, SALT km after km of it !!!!!!!

You mean like our Lake Lefroy [}:)]

We have hard clay pans too that are closer than the salt!

give me a sqmile of tarmac yes please.1x2kmof kalgoorlie clay would be awesome. just looked at some gps had one 84kph to 0 in 50sec immeiately followed by 0-85.1kph in 52sec.
that was miranda spinning out and sailing off again

Hey!!! What about Phillip Island (Never been there but it sounds flat) Race Track when it isn't being used?????? Gotsta be some LOOOONG Straights to hit on surely????
Ron