Wind Speed

> 10 years ago
Reply
Register to post, see what you've read, and subscribe to topics.
BobMc
BobMc
27 posts
27 posts
16 Aug 2013 1:09pm
New to the forum and to the sport. I just finished my first LLf Mini build and have been awaiting some wind here in Homer Alaska in order to try it out.

I did take it out in about a 5 mph wind today on asphalt with no real result.

I was curious as to what kind of wind speed I should expect to be able to sail in.

I am using about a 4 meter sail (unsure about that, maybe a bit smaller), I weigh about 86 Kg. and I will be sailing on sand and asphalt.

I appreciate any feedback,
Gizmo
Gizmo
SA
2865 posts
SA, 2865 posts
16 Aug 2013 3:05pm
Thats got to be the most picturistic land sailing location I have ever seen.......
Arjay
Arjay
VIC
267 posts
VIC, 267 posts
16 Aug 2013 8:48pm
gee I do like the look of that spot. 5mph will be on the edge of getting going, but more reliable and enjoyable above 8 knts. Have fun.
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
16 Aug 2013 8:15pm
BobMc said..

New to the forum and to the sport. I just finished my first LLf Mini build and have been awaiting some wind here in Homer Alaska in order to try it out.

I did take it out in about a 5 mph wind today on asphalt with no real result.

I was curious as to what kind of wind speed I should expect to be able to sail in.

I am using about a 4 meter sail (unsure about that, maybe a bit smaller), I weigh about 86 Kg. and I will be sailing on sand and asphalt.

I appreciate any feedback,


5mph should work if you are reaching,and slightly upwind. downwind will be a struggle. meanwhile ,have a look at just how easily your wheels roll.
we use precision ball bearing wilth light seals. a bit of spray or light oil over the seals to loosen them up. tyres aught to to be ribbed type, but more importantly light weightas possible. great heavy 6 ply tyres that can be used on the road are gonna stop you dead
I left your pic in my reply cas its just AWESOME!!!!!!!!!!!!
BobMc
BobMc
27 posts
27 posts
16 Aug 2013 10:23pm
Thanks for the input.

I'll spend some time on my wheels, see if I can't get them loosened up. My front is in pretty rough shape, scavenged off an old wheelbarrow.

Chook2
Chook2
WA
1249 posts
WA, 1249 posts
16 Aug 2013 10:25pm
I'm gob smacked by that back drop!!!!!! Stunning..................

An old trick that was taught to me, by a fellow radio controlled glider pilot was.
For comparison of wind speed "square it" to get power ratio.
eg. 6 knots x 6 =36
8 knots x 8 = 64
so, 6 knots, is half as power full as 8 knots.

I use this simple math, all the time when kite buggying.
I select the correct size traction kite, by multiplying the "actual wind speed" to see what m2 I'll be using.

I weigh too much and need lots of m2 to get moving. On hard salt yachting, nothing happens before 7knots for me. Even with a 6.9m2 sail.
desertyank
desertyank
1264 posts
1264 posts
17 Aug 2013 12:24am
Great photo. How far from home is that area? Do you have any pics of the build?
BobMc
BobMc
27 posts
27 posts
17 Aug 2013 12:44am
This spot is about 5 kilometers from my house. We live on the kachemak bay, lots of beach at low tide. The sand varries in hardness quite a bit from place to place though.

I did not take any pics of the build. Most of the frame is made from an old weight bench. I used a well seasoned spruce tree (as we have an abundance here) for the mast and boom, the sail is made from tyvek and fashioned in the radial style as explained on this site. I purchased two of the wheels from Home depot (wheelbarrow) and the front is a scavenged wheelbarrow tire.

With wheels, paint (John Deere), fence post for mast step and pulleys the total cost so far is just under $150.

The tyvek was given to me. I would like to find some more as the sail making aspect is very interesting to me. My battens are made from Douglas Fir (still experimenting with stiffness and taper).

Still need to add something under the foot pedals to keep my feet from hitting the ground in case they slip off and also need to istall a seatbelt. I will be checking the transfer station salvage pile for old car seat belts. I will post some pics of any and all upgrades to the mini.
BobMc
BobMc
27 posts
27 posts
17 Aug 2013 12:47am
Chook2,

Thanks for the info on power ratios. Really puts it into perspective. I will put that one in the tool belt
US306
US306
55 posts
55 posts
17 Aug 2013 1:17am
to keep your feet from slipping off you foot pegs, use heel hangers, it is just a loop from your foot pegs around your heels back up to the peg. run the loops out the top and down around your heels back on the top, by having the loops off the top the rope will hold forward so it easier to drop your heels in. I run the rope though soft vinel tubing which really helps to hold the hangers forward. Just the rope goes though the pegs the vinel tubing lays on the radius of the foot peg../Burt



Chook2
Chook2
WA
1249 posts
WA, 1249 posts
17 Aug 2013 9:24am
US306 is right on the money.
I have a dodgy leg so use heel straps on my kite buggy and small yacht.
I make them out of heavy "1 Ton ratchet strap" webbing and they can be adjusted for angle of your heel and also the depth to support your heel. The red coloured tape is a tow strap. "Walk of shame" strap. With heel straps you can steer with only one foot, which helps when your kicking your yacht/buggy, backwards with the other, to position it.

"Pannikin" a mini mini yacht. Also there is no such thing as a sail that's too big on a light wind day. (Just a fun photo it's never sailed with this 9m2 sail.) I reckon this sail would hammer on a class 3.


Your going to just love what you have built. Keep us posted Bob.
Please Register, or first...
Topics Subscribe Reply

Return To Classic site 😭
Or... let us know if a problem, so we can tweak! 😅