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Chris Noble View Drop Down
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Post Options Post Options   Quote Chris Noble Quote  Post ReplyReply Direct Link To This Post Topic: Anyone With Some Input
    Posted: 14 Dec 05 at 10:52pm

Not quite dinghy development, but pretty close, my newest toy, just finished it the other night, some minor hicups in the design needing refining, i need to make a sail with a tighter leech and add some weight to the extensions, but other than that she went a treat, we timed it over a measured distance and got 18 km/h on the first outing so far so good. Once ive refined it ill send the plans to anyone interested, it hasnt cost much to make at all.

 

pictures are a bit off quality as they are from my fone, any one with any input to the design please feel free to comment. Some research online says that designs very similar to this on which it is based roughyl can acheive 40 km/h



Edited by Chris Noble
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Bumble View Drop Down
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Post Options Post Options   Quote Bumble Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 6:20am

That is very cool...... I think I want one. I can just point out the obvious really - just like your moth, the only thing stopping it going at light speed is drag with the ground, and drag with the air.

I suspect the air resistance is the greater factor by a long way, but much of it can't be solved. I think the rig should be as high aspect as the materials will allow, and you mentioned poor leech tension. Consider a selfvanging wishbone configuration which should save weight considerably.

It looks like you can easily lower the CofE of the rig, and as speed increses, I suppose more rake will be benifitial.

I can't see the materials, but if your rear axil (it loos like) is a metal which can flex, you will need to 'toe in' the rear wheels to reduce drag.

I don't know... like I said, cool toy.

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Post Options Post Options   Quote Philsy Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 8:52am
Looks fun - I want one!

Hard to tell from the photo, but the wheels look quite small in diameter,
which may cause a problem on uneven tarmac.

Also, you need to ensure the front wheel stays on the ground to keep
control - what's it like to steer?

Phil
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Post Options Post Options   Quote Skiffe Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 10:51am

Its a bit hard to tell how its built, but its look cool. When you get around to it I'd love a set of plans.

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Mark Jardine View Drop Down
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Post Options Post Options   Quote Mark Jardine Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 11:12am

We did this a while ago and called the class the 1DL. We've all still got radio controlled landyachts down in the Southampton area. Here's a picture of us racing at Weymouth in 2002.

We've got all the stuff to build a load more of these and get the circuit going again in 2006. We had 20 out at the nationals in 2000 and it is such a laugh. We regularly clocked them over 30mph sustained speed (GPS).

To see more of the events we ran go to:

http://www.yachtsandyachting.com/classes/?s=42&c=124



Edited by Mark Jardine
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Philsy View Drop Down
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Post Options Post Options   Quote Philsy Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 11:14am
I'd be up for this!
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Post Options Post Options   Quote Guest Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 11:17am
Originally posted by Mark Jardine

We did this a while ago and called the class the 1DL. We've all still got radio controlled landyachts down in the Southampton area. Here's a picture of us racing at Weymouth in 2002.

We've got all the stuff to build a load more of these and get the circuit going again in 2006. We had 20 out at the nationals in 2000 and it is such a laugh. We regularly clocked them over 30mph sustained speed (GPS).

To see more of the events we ran go to:

http://www.yachtsandyachting.com/classes/?s=42&c=124

Is it available as a kit?

Rick

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Mark Jardine View Drop Down
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Post Options Post Options   Quote Mark Jardine Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 11:19am

Here's a picture of us racing at Poole:

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Post Options Post Options   Quote Mark Jardine Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 11:23am

I'm sure it could be - I've got around 10 half-built landyachts at the moment without the rig. The rules we made up had a one-design hull but the rig was open to design as long as the whole landyacht fitted inside a 1.5 m hight by 1 m long by .75 m wide box with the main sheeted fully on. We made a jig for producing the hulls so they were all the same and could mass produce them.

We could knock them up for around £250 quid with 44.1 Mhz RC gear, high speed and strength mainsheet serve (the expensive part) and carbon spars and back axle.

I've been waiting until I built my new garage / workshop until completing them. It would be great if the forum revived this class as it was such fun at the time!

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Isis View Drop Down
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Post Options Post Options   Quote Isis Quote  Post ReplyReply Direct Link To This Post Posted: 15 Dec 05 at 12:09pm
I have wanted to build something like this on and off for the last few years... even getting as far as building a spaceframe and mould for the shell at one point (now sat in my garage looking pretty sorry for itself)

Id be really interested in a revival... I see there used to be a 1dl.co.uk which is now offline. If you still have a copy of it somewhere id be happy to host it on my webspace if people are interested?

How much would you be willing to sell the unfinished yachts for? with or without the RC gear/spars etc?
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