large r/c yacht

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15 May 2010 at 13:29 #26802
roger thompson 1
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@rogerthompson1
as a newcomer, but with model making experiance, could anyone point me in the right direction, i want to build a metre long yacht, preferably with one sail similar to the lazer type you can buy commecially.

possibly someone has a vic smeed plan which would be suitable .

also, are the servos used in model aircraft strong enough to work the rudder and sail on a yacht?

thanks, roger.
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15 May 2010 at 13:29 #6647
roger thompson 1
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@rogerthompson1
15 May 2010 at 15:26 #26803
Len Ochiltree
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@lenochiltree67043
Hi Roger,

Aircraft servo should be ok for the rudder, but for pulling in the sail you will need something stronger and a long servo arm, try Howes they advertise in the MB mag they do sail arm servos.

Len.
15 May 2010 at 16:01 #26805
roger thompson 1
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@rogerthompson1
thanks len, its just i have some aircraft servos from when i used to fly.
17 May 2010 at 11:12 #26823
Len Ochiltree
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@lenochiltree67043
Dont we all!.

I am using up electric plane stuff making Air Boats. (see my photos ).

Len.
17 May 2010 at 14:03 #26829
Eric Moffat 1
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@ericmoffat1
G’day roger, I doubt if you will find a Vic Smeed plan for a 1 metre. They did not have 1 metre boats in his day.

However I might be able to locate one of his 36″ plans for a yacht called “Krispie” he built using strips of cardboard from breakfast serial packets for planks, don’t laugh, it works! I tried it. He used a number of coats of paint to waterproof it, but I went 20th century and used fibreglass resin. The design is for sloop rig not single sail.

Eric
17 May 2010 at 21:48 #26836
roger thompson 1
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@rogerthompson1
thanks for all the replies. -i wonder if i could use wee nip plans and double the size?–is it about 15 inches long?
18 May 2010 at 05:55 #26838
Eric Moffat 1
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@ericmoffat1
G’day Roger, like I said, the plan is for a 36″ boat, ie, approx. 3″ less than a metre. If you doubled the size you would have a plan 12/13ths. less than 2 metres!!

Eric
18 May 2010 at 23:54 #26844
roger thompson 1
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@rogerthompson1
can anybody explain what a hard chine hull is please?————i notice a vic smeed yacht namely “snow goose” 36″ which is claimed to be suitable for a beginner.

can anyone confirm this please?
19 May 2010 at 08:35 #26846
David Meier
Participant
@davidmeier28154
Hi Roger.

A hard chine is where the side of the boat hull meets the bottom of the boat with a hard corner, rather than one blending into the other in a smooth curve. As a generality most planning hulls are hard chine and displacement hulls are frequently all flowing curves.

I have a hard chine yacht called “Dab Chick” that I restored and fitted radio control, it was from a model boats free plan I think. It sails very well.

I think a hard chine yacht would be a very good one to do as a first build.

Cheers

David.
19 May 2010 at 16:29 #26856
roger thompson 1
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@rogerthompson1
thanks dave for your time.———seems you have to send for plans and figure out if you are proficient enough when you get them, pity you cant see the designs before beforehand, but i think i could handle a three star .

are there any sites for a free download and a contribution if the plans are used that you know of?

thanks again, roger.
19 May 2010 at 18:52 #26857
Tony Hadley
Participant
@tonyhadley
Hi Roger

Have you considered building New Zealander Bryn Heveldt’s 750mm yacht ‘Racing Sparrow’? A book (Build Your Own Radio Controlled Yacht) was published, in 2006, complete with plans, full build instructions etc. This is an extremely well detailed book to build an attractive modern up to date sport yacht. Although the yacht plan is 750mm long some builders have scaled up to 1m, should this be required.

ISBN 9-781844-860432 A Conway Maritime book.

Just a thought

Tony.

Edited By Tony Hadley on 19/05/2010 19:02:48
20 May 2010 at 07:42 #26862
David Meier
Participant
@davidmeier28154
Hi Roger.

Here is a site that has some free plans on it.

http://www.modelismonaval.com/index.html

I have down loaded plans from the site and started making one of them. The text on the plans are in Spanish which is a bit of a challenge, but as they say a picture is worth a thousand words.

Hope this is of some help.

David.
28 May 2010 at 21:24 #26986
roger thompson 1
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@rogerthompson1
thanks to all who have taken the trouble to answer my queries, and i have now sent for plans for the fe fe 2 yacht.

one more thing, what servo set up will i need for the sails?——– is it some sort of winch or a servo arm that moves the jib?

thanks, roger.
28 May 2010 at 21:24 #26987
roger thompson 1
Participant
@rogerthompson1
thanks to all who have taken the trouble to answer my queries, and i have now sent for plans for the fe fe 2 yacht.

one more thing, what servo set up will i need for the sails?——– is it some sort of winch or a servo arm that moves the jib?

thanks, roger.
30 May 2010 at 08:50 #27005
David Meier
Participant
@davidmeier28154
Hi Roger.

For a one meter yacht you would be best to use a sail winch servo. For smaller yachts you can use a largish standard servo with an extended arm to give the required travel. I have a ready to run 900mm yacht that came with a sail winch to operate the sails and I have a 750mm yacht that I restored and fitted a 10kg metal geared servo that I extended the arm on. Both work well. It is just that the sail winch is more up to handling the loads you get with the bigger yachts.

If you are interested I can post a photo of both types.

Cheers

David.
1 June 2010 at 21:57 #27040
roger thompson 1
Participant
@rogerthompson1
does anyone know if using 3.5 mm ply would be too heavy for a 1 metre yacht?

i am building a fe-fe and have access to this size ply.

thanks, roger
2 June 2010 at 02:17 #27047
David Meier
Participant
@davidmeier28154
Hi Roger.

As a general rule you want to build the yacht hull as light as possible and have as much lead as you can at the bottom of the keel to make the boat sit to the waterline. This gives the maximum amount of righting moment to counter the wind force on the sails.

Having said that if you are like me and working to a budget and you have 3.5mm ply already why not use it. The boat will still sail, it will just be a bit slower than one of the same design with a lighter hull and more lead on the keel.

Happy building.

David.
2 June 2010 at 03:16 #27048
David Meier
Participant
@davidmeier28154
Hi Roger.

Here are the photos I mentioned on the PM.

If you look closely you can see one thread coming out of a curved tube on the front of the deck on the small green boat and then changing to two threads by the mast stay wire (one thread going to each sail).

On the Monsoon yacht a thread comes from each side of the sail winch drum and go through separate holes in the deck to each of the sails.

Edited By David Meier on 02/06/2010 03:25:14
3 June 2010 at 00:07 #27068
roger thompson 1
Participant
@rogerthompson1
thanks for the pics. david.——-i now am beginning to get the picture of how the sails are operated.

how do you know where to put the servos , balance wise?-or is it not too critical?

rog.
3 June 2010 at 08:44 #27070
David Meier
Participant
@davidmeier28154
Hi Roger.

On a yacht the positioning of the servos is probably not to critical as the far bigger balancing factor is the lead at the bottom of the keel. Positioning the servos for convenience is more practical and you can always do some trimming with where you put the battery pack and receiver.

Is there a model boat club near where you live? I found it tremendously helpful when I visited our local club, seeing the different way things are done on peoples boats was a great help and I could chose the methods that I felt suited me best . There is such a lot of knowledge in these organisations and every one is so willing to help. Needless to say I soon joined the club.

Cheers.

David.
5 June 2010 at 05:12 #27092
mussels
Participant
@mussels
Hi from NZ everyone. I am new here and would like to ask the crew if I can get, commercially, a scroll that traditionally goes round the hawse pipe of the old Grand banks schooner . I have such a model at two metres long and I am at a loss to make these myself. I am also tinkering with the idea of molding sixteen dorys for said model useing a vac pac machine that has just been purchased at my work. Any advice would be gratefully received. Regards Ronnie
6 June 2010 at 18:35 #27136
roger thompson 1
Participant
@rogerthompson1
hi david, yes there is a model club nearby, but they mainly sail motor boats and such. not many members have yachts, but there are a few which are sadly those off-the shelf-sail now types.

when i was a nipper the local hobby shop kept all sorts of balsa, glue and hardware for home build, i can remember a whole showcase full of props, rudders and similar spares.

just before it closed down it was all kits and toys, the home constructor was not catered for as the modern generation wanted to buy in the morning and sail/fly in the afternoon.

however, now thanks to you and others who have kindly replied, the bulkheads are laid on the baseboard and the hull will be cladded this coming week. i was a bit disappointed to find on the plan which was for a beginner some of the plan was half size, i expected to find it all full size for easy copying but i have managed to figure it out!

still cant work out why there are three sail plans, different sizes included though.

cheers, roger.
6 June 2010 at 23:44 #27137
David Meier
Participant
@davidmeier28154
Hi Roger.

Did you get my PM about the three sail sizes?

The three sets of sails are for different wind conditions. They are
usually referred to as No 1, No 2 & No 3 sets and are for light,
medium and strong winds. So to start with you could pick a size that
best suits the predominant wind conditions and later make the other sets
as you get into it.

You could get the half size bits of the plan blown up to full size at a photo copy shop. I have done this on a number of occasions and it works well.

Can you post some photos of the build progress?

Cheers.

David.
7 June 2010 at 00:56 #27139
roger thompson 1
Participant
@rogerthompson1
hi david, no, i didnt see your info, on sail sizes, but i wondered whether they were for competion use, as the yacht falls within the one metre class.– i was thinking of using the middle size to start with

regarding sail winches, i have seen a winch which pulls 6.5 kg so do you think this is big enough for a one metre yacht sail? ——– seems quite cheap at £15 and it has ball races too.

at the moment the build is only up to the bulkheads temporary tacked down to the building board ready for planking but i will send you some pics. as soon as it starts to take shape.

once more, thanks for your time and interest.

roger.
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