General Mast Construction.

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Nikrum
Nikrum
TAS
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TAS, 1972 posts
23 Jan 2011 8:27pm

I pose this question to Paul, Cisco and who ever wants to add their 10c Worth.
Would it be safe to assume that a more flexible mast would be suited to beginners? and as you become more accustom to the foibles of the wind go to a stiffer Mast?

If I have learned one thing from my small sailing experience and from driving. It is that one cannot afford time to think and react it has to in fact be the opposite, one must react (Correctly) to a situation and then think about how you saved the day later. Anything in the beginning to allow time for correct reaction is a boon to the beginner (Softer Mast).

I think a softer Mast is probably less efficient to our sport in Speed Racing but would have a beginner over before they knew what was happening.

In the last week I have had 2 young ladies sail Occum's Razor successfully, I believe because it is a heavier land yacht with a more flexible mast and as the picture.


the Razor (Perhaps I should call Phydaux) because it can lift it's leg Perhaps a more rigid mast would have hag her over as well.
Ron

cisco
cisco
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23 Jan 2011 10:55pm
Nikrum said...


I pose this question to Paul, Cisco and who ever wants to add their 10c Worth.
Would it be safe to assume that a more flexible mast would be suited to beginners? and as you become more accustom to the foibles of the wind go to a stiffer Mast?


I think that is about the way of it Ron but suck and chew it first and see how it mushes. It is not necessarily gospel in all cases.

cisco
cisco
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12365 posts
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23 Jan 2011 11:00pm
Nikrum said...
In the last week I have had 2 young ladies sail Occum's Razor successfully, I believe because it is a heavier land yacht with a more flexible mast and as the picture.


I have put young ladies in my landyachts too and they invariably squealed with surprise, pleasure and delight!!

Did they do that for you too??

Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
24 Jan 2011 12:07am
Oooh! you lucky Devil you.. The one pictured said "****! It is quick" and took the Razor down the beach under control. The second a little Hong Kong Chinese Lass Giggled with delight and "Kept telling me how she didn't know how to make it go forward or stop but managed both. Then she wanted her picture taken with Occum's Razor and I. I also explained how she was not to go back to Honkers and tell people I was a Silly Old Fart to which she giggled a bunch more.
Ron
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
24 Jan 2011 12:11am
cisco said...

Nikrum said...


I pose this question to Paul, Cisco and who ever wants to add their 10c Worth.
Would it be safe to assume that a more flexible mast would be suited to beginners? and as you become more accustom to the foibles of the wind go to a stiffer Mast?


I think that is about the way of it Ron but suck and chew it first and see how it mushes. It is not necessarily gospel in all cases.




As anything involving Humans there would seem to be a general Rule of Thumb and some Fuzzy Logic involved. I was suggesting based on "All things being equal"
Ron
Nikrum
Nikrum
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1972 posts
TAS, 1972 posts
29 Jan 2011 12:17am
I just had another thought.. Terrible things as they seem to get me into Hot Water.

It is said that an Aircraft wing that has it's wing tips set forward of the the Wing Root is more efficient though a bit more unstable in flight. Mind you with computers in control they could make a Brick fly straight these days. The other thing they are doing is applying a Stall Pack/Truncation to the Wing Tips. This stops Air from the top of the wing from spilling over to the bottom side decreasing the lift potential of the wing. High Pressure area spilling into Low Pressure area. With the Squarer Sail Head type sails Has anyone given thought to using a similar type setup to improve efficiency at the Sail Head?? If you look at a Long Range Passenger Jet and the recen Learjet's from front on the Wings look a bit like an "L" on its back where as I was thinking more in the way of a "T" from front on. This would allow the effect to be effective from both sides of the sail preventing any air transfer from one side to the other. Just a thought and probably well flogged anyway??
Ron

Test pilot 1
Test pilot 1
WA
1430 posts
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28 Jan 2011 10:30pm
Richard has similar on top of Greenbird wing
landyacht
landyacht
WA
5921 posts
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30 Jan 2011 8:54pm
what you thinking of is a end plate to stop a tip vortex forming. before adding one put a load of telltales up there and see what happening. I did on VINDIVATOR's wing and was pleased to see evry telltale streaming nicely, so didnt add a plate
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
2 Feb 2011 11:22pm
Paul
I guess that depends on what industry you are in and who has devised the Additions but I guess Truncations would be more accurate and in the case of a Sailing Vehicle, Double Truncation. No matter what their name they all serve that same purpose, to deplete the Efficiency Loss via tip Vortex. That is why a wing designed to sweep forwards is more efficient than the std swept back wing. Actually it would be interesting to see the effect on Occum's Razor when it's sail lays over in heavy gusting. I should think the more rigid the Sail/Wing the better it would function. As for my Mast I am not sure how to or weather to Stiffen it as under some of the heavy gusting I have experienced OR surges heavily increasing a great deal in speed when least needed. It would be more than likely to want to do the Phydaux thing and get one leg up Hopefully not at a post, Tree or Building etc. What are your thoughts on this sort of thing.
Because The Strip has a couple of largish buildings up one end Winds from the SW offer a Wind Shadow then clear for the last 1/3 of the strip giving acceleration when you really should be looking to back Off.
Ron
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2 Feb 2011 9:07pm
Nikrum said...

Paul
I guess that depends on what industry you are in and who has devised the Additions but I guess Truncations would be more accurate and in the case of a Sailing Vehicle, Double Truncation. No matter what their name they all serve that same purpose, to deplete the Efficiency Loss via tip Vortex. That is why a wing designed to sweep forwards is more efficient than the std swept back wing. Actually it would be interesting to see the effect on Occum's Razor when it's sail lays over in heavy gusting. I should think the more rigid the Sail/Wing the better it would function. As for my Mast I am not sure how to or weather to Stiffen it as under some of the heavy gusting I have experienced OR surges heavily increasing a great deal in speed when least needed. It would be more than likely to want to do the Phydaux thing and get one leg up Hopefully not at a post, Tree or Building etc. What are your thoughts on this sort of thing.
Because The Strip has a couple of largish buildings up one end Winds from the SW offer a Wind Shadow then clear for the last 1/3 of the strip giving acceleration when you really should be looking to back Off.
Ron


not sure just what your question is ?

Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
3 Feb 2011 9:38am
Paul
As for my Mast I am not sure how to or weather to Stiffen it as under some of the heavy gusting I have experienced OR surges heavily increasing a great deal in speed when least needed.
I am sort of considering stiffening the Razors Mast (That sounds Bad,bad,bad)but I don't want to ruin a CF Stick if it doesn't work.
Ron
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
3 Feb 2011 5:57pm
Yup! It Just occurred to me that I have to take around 800mm from my Spare mast to suit the New Sail. Now here is what I'm thinking, I can knock the excess of the top of the mast working in the stiffer/thicker part.. How does that sound?? I had thought of putting a section inside but that would leave a weak point at the mast join..

Ron
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4 Feb 2011 4:30pm
Nikrum said...

Paul
As for my Mast I am not sure how to or weather to Stiffen it as under some of the heavy gusting I have experienced OR surges heavily increasing a great deal in speed when least needed.
I am sort of considering stiffening the Razors Mast (That sounds Bad,bad,bad)but I don't want to ruin a CF Stick if it doesn't work.
Ron



sounds like you need a softer mast
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
4 Feb 2011 8:39pm
That's really funny as I was thinking it was too soft as it realy bends a hell of a lot but doesn't lift a wheel very often. So there is the problem not having Land Yachter's about the local. I gusess like Cisco I;m going to have to chew it up and mush it a bit.
Ron
bumbadin
bumbadin
7 posts
7 posts
27 Mar 2011 4:07am
hey guys im a bit stuck, im in the process of designing my first "wind warrior"(please tell me if that was sad), the frame fabrication is the part im confident about - just got to lay out a floor plan to tailor to my height. its catching the wind correctly that puzzles me (apart from the basic physics) im struggling to understand the basis of how the setup of the mast sail and rigging mechanisms work (basicly need to know what does what and where it goes). thought you could point me in the right direction (diagrams, drawings, jargon busters, etc) cos google is like a mass of noise

thanks in advance
andy
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
27 Mar 2011 10:15am
G'day Andy,
Have you started your build yet??? If not I would suggest strongly that you browse through Construction and find a set of plans for a beginner preferably a LLF Mini I built both a Class5 and a Mini together. Until you get a little experience in fabrication Stick religiously to the design and you can't go wrong. Adapting an existing Wind Surfer Sail is a viable cheap option and should be done to Paul Days Formula. Once you've built one or two units and learned the What and Where Fores then you can go for it in design for yourself.
Good Luck
Ron
PS It can never be one construction as the whole experience is totally addictive.
nebbian
nebbian
WA
6277 posts
WA, 6277 posts
27 Mar 2011 2:41pm
Nikrum said...

I just had another thought.. Terrible things as they seem to get me into Hot Water.

It is said that an Aircraft wing that has it's wing tips set forward of the the Wing Root is more efficient though a bit more unstable in flight. Mind you with computers in control they could make a Brick fly straight these days. The other thing they are doing is applying a Stall Pack/Truncation to the Wing Tips. This stops Air from the top of the wing from spilling over to the bottom side decreasing the lift potential of the wing. High Pressure area spilling into Low Pressure area. With the Squarer Sail Head type sails Has anyone given thought to using a similar type setup to improve efficiency at the Sail Head?? If you look at a Long Range Passenger Jet and the recen Learjet's from front on the Wings look a bit like an "L" on its back where as I was thinking more in the way of a "T" from front on. This would allow the effect to be effective from both sides of the sail preventing any air transfer from one side to the other. Just a thought and probably well flogged anyway??
Ron




Funnily enough, the 'fat head' on modern windsurfers sails does exactly that -- far from just flapping around doing nothing (which is what it looks like) it actually improves efficiency of the lower parts of the sail. It also depowers the lower parts of the sail in a gust.

As for whether to use softer or harder masts -- the general rule of thumb is to use a softer mast for lighter weight sailors, stiffer masts for heavier sailors.
Test pilot 1
Test pilot 1
WA
1430 posts
WA, 1430 posts
27 Mar 2011 5:43pm
Instead of using differentmasts just start them out on a smaller sail. that way they are less likely to get into trouble at speed.
Gizmo
Gizmo
SA
2865 posts
SA, 2865 posts
27 Mar 2011 8:45pm
bumbadin said...

hey guys im a bit stuck, im in the process of designing my first "wind warrior"(please tell me if that was sad), the frame fabrication is the part im confident about - just got to lay out a floor plan to tailor to my height. its catching the wind correctly that puzzles me (apart from the basic physics) im struggling to understand the basis of how the setup of the mast sail and rigging mechanisms work (basicly need to know what does what and where it goes). thought you could point me in the right direction (diagrams, drawings, jargon busters, etc) cos google is like a mass of noise

thanks in advance
andy

Hi Andy here is a link that you might find useful to get you started...
http://www.lathingstodo.com/landsailing/groundschool.htm
bumbadin
bumbadin
7 posts
7 posts
28 Mar 2011 6:08am
Gizmo said...

bumbadin said...

hey guys im a bit stuck, im in the process of designing my first "wind warrior"(please tell me if that was sad), the frame fabrication is the part im confident about - just got to lay out a floor plan to tailor to my height. its catching the wind correctly that puzzles me (apart from the basic physics) im struggling to understand the basis of how the setup of the mast sail and rigging mechanisms work (basicly need to know what does what and where it goes). thought you could point me in the right direction (diagrams, drawings, jargon busters, etc) cos google is like a mass of noise

thanks in advance
andy

Hi Andy here is a link that you might find useful to get you started...
http://www.lathingstodo.com/landsailing/groundschool.htm



Brilliant, just sat reading that page. astounded by how simple it sounds wen theres a diagram, and from the description of the sheetline i've worked out (i think) that the block of pulleys just makes it less tug of war with the end of the boom.

oh nikrum dont worry, ive not started the build yet, atm just scouting around to find suitable materials. ive seen a few on here to base it on - nothing outrageous yet. the only bits im testing out on paper is structural integrity (gussets/plating, direction of stress on joins and welds, etc) and simplicity (not got a wide range of tools) for instance using box section cos squares r easy and sort of contemplating one that slots (and bolts) together cos my shed is like a spider's johnson
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
28 Mar 2011 10:30am

Sounds Like you're getting all Teckanogicle about it, but better sure than sorry bumbadin.

Paul or anybody. How did this page finish up out front in the search strings on the WEB?
i.e. I was searching through dogpile.com for pages on Land Sailing and Low and behold there was this page on Mast Construction.
Ron
Test pilot 1
Test pilot 1
WA
1430 posts
WA, 1430 posts
28 Mar 2011 10:41am
Web site pages with the most usage refering to the search word or phrase go to the top of the list
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
28 Mar 2011 1:28pm
last year if you googled landsailing you would have got seabreeze forums right at the top. the top of the lists seems to have become blokart orientated.
a few years ago blokarts insisted that they were not landyachts, but now it seems they are and all the dealers have some variation of the word in their business names. . maybe they get more customers that way
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
28 Mar 2011 6:34pm


I guess they would be a bit of fun but without being nasty I can't help but see them as toys. It is a pity there aren't some commercial builders of Land Yachts in Aussie. If there are I've not seen them. I suppose by the time you get accreditation and cover all the OH and S criteria etc etc etc etc blah blah blah. It just wouldn't be worth it as they would be astronomical.

Ron
cisco
cisco
QLD
12365 posts
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28 Mar 2011 11:19pm
Test pilot 1 said...

Web site pages with the most usage refering to the search word or phrase go to the top of the list


So does that mean if I start 10 new threads titled land yachting and typed in land yachting into each thread 100 times, it would put this site up as the first five search results on land yachting on Google??

Test pilot 1
Test pilot 1
WA
1430 posts
WA, 1430 posts
29 Mar 2011 3:33pm
Only if some on ls did not do th sam
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
29 Mar 2011 7:43pm
Test pilot 1 said...

Only if some on ls did not do th sam


WTF??? And you picked on my spelling??? Damn! Talk about double Standards!!
Ron[}:)]
Test pilot 1
Test pilot 1
WA
1430 posts
WA, 1430 posts
29 Mar 2011 6:39pm
My 5th lttr not working on kyboard
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
29 Mar 2011 11:11pm
Well get a new Keyboard. 'samaddayou

Ron
Test pilot 1
Test pilot 1
WA
1430 posts
WA, 1430 posts
29 Mar 2011 10:37pm
bit 'ard, its part of laptop
Nikrum
Nikrum
TAS
1972 posts
TAS, 1972 posts
30 Mar 2011 10:59am
Toy??
Get a real PC [}:)]
Ron
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