Hi TOMARACK!

You mean like this stuff? Available in 4mm, 5mm, 8mm, and 10mm, in my model sail loft. Seams are interlocked together so that no seam loose edges are showing on either side. Three strips of double-backed tape per seam. I have 8 sails to deal with, 63 panels, and 55 seams plus hems. I am about two-thirds the way through seaming. The draft for these sails is SUPPOSED to be 20% at 40% chord depth. So far I am close. The foresail was thrown out and is in re-do. ALIGNMENT!! The current teaching sailcloth is simply polyester cotton left overs. When i pass SAILMAKING 1 I will move up to 36 gram RIPSTOP. The seams are 4mm overlap then folded to hide the edges, and taped again. Is this tape 3M sufficiently strong enough adhesive to operate without oversewing?

here is next link

To Ross .. Is it the one or similar. The width of the tape according to the size of the sail. I used such tapes mainly when gluing Ripstop material, both for gluing parts together and for gluing edges. My friends mainly use this technology. We use mainly
3M tape 4 - 5 mm overlap. I even use this tape for gluing boltropes to big cotton sails for model and for gluing boltropes in general.
You can find many similar tutorials on YouTube

Tom

Tom,
Drawing of typical seam shown in cross-section 4mm wide seam.
Are you sewing through the tape after or not sewing at all? Does the tape hold by itself without sewing the seam? I am using tape in between each layer of the seam.
4 layers of cloth
3 layers of tape

You have plenty of sail there Ross. Remind us how large your boat hull is 😉

"I was teasing", certo.
Well I thought of 183 cm by eye, you measured it, it doesn't apply. Joke.

About that:
"The JIB TOPSAIL will need to be pulled over the mainmast forestay, so 2 sheets, port and starboard, will be needed to handle the JIB TOPSAIL. Likewise, the JIB will need to be pulled over the foremast, requiring so 2 sheets, port and starboard, to handle the JUMBO runs quite normally with its JIB BOOM."

I don't think I understood very well due to the translation. A drawing would be useful.
However, if I haven't misunderstood, your system seems valid to me but very difficult to create as an RC model.
If I'm not misunderstanding, I thought about doing it that way too but then I gave up.
In practice it is very similar to the real system. I couldn't do it like this, have you seen what mine is like?
Maybe you pass the sheets through two different holes and control them with a spool below deck?
Ah! Maybe I understand, you exploit the already existing closed loop.
A sheet is bullshit and a sheet is pulled.
I can not wait to see it. I will learn a lot and I could probably copy you in the future.

You wrote:
"I don't think there is enough time to change it during tacking."

So for you it's just a matter of time. You are very ahead of me, because I really can't imagine how I could do it in an RC model, even having all the time available.
When sailing I would find no other solution than to remove it so as not to prevent the foresail and top foresail from changing tack.

However this model becomes more and more interesting and I can't wait to see it in the water.

Ok Ross, I think I understand, you were very clear (this time I didn't use the translator and it was better).

The doubt that remained with me was this: when the staysail is gathered back towards the mainmast (to ensure that the FORESAIL moves to the opposite side when tacking or jibing) aren't there still two running riggings left (between the foremast and mainmast) to prevent this manoeuvre?
Maybe they will be stretched enough to not stop the movement?

However I have the impression that when I see the system in action or in a drawing I will say: "ah that's how it worked! Well done Ross".

Do you mean just one servo (besides the one for the jibs) for all the other sails? A total of two servants for the whole ship?

Thank you very much RossM for your explanations, everything is clear to me now.

In reality, what was happening above deck was already very clear beforehand but I had many doubts about what was happening below deck. Now thanks to your descriptions it is much clearer.

However, I wanted to ask you one more question, but you didn't do anything wrong, absolutely, it's just my curiosity, I hope it won't bother you.
Keep in mind that I like many models being worked on on this forum but I consider some to be more interesting because they are more difficult.
Commanding all these sails is not a given and yours is one of the most difficult jobs to complete.

I wanted to know if you have already tested this system for jibs before or not. I'm asking you because initially I too thought of this system, as it was much more realistic.
But then I gave up due to the various difficulties I couldn't deal with: firstly I had too little space, secondly I feared that this system would only work in theory because in practice the sheets (as thin as mine) would get tangled.
You certainly have more space as it is a very large model but I don't know how you will manage the second problem.
What worries me is that the sheet is not under tension when it loosens (unless you count on the traction of the wind which however is not a certain guarantee of strength or constancy), but only when it is furled.
I'm curious to see how you'll do it (because I'm sure you've already found the solution or will find it) and learn.

Alessandro,
Thank you for the continuing questions. Yes. You have identified a definite problem.
1. Starting at the winch, I chose a winch speed that would allow fast enough speed for the sheets.
2. I tested the winch with a 2 kilogram weight. It passed the test.
3. I was told to NEVER use twisted string/thread for a sheet. It will wrap up and twist. The photo shows heavy twisted thread and the braided cord. What I chose was a braided nylon cord approximately 1.5mm diameter. It is commonly used as cord on window blinds and is available in large quantities for a reasonable price. It is similar design to braided lines used on many full sized boats
4. The lines running below deck will be contained in plastic tubes from just beyond the winch to the surface of the deck. Hence the need for overpowered winches, to compensate for the string/plastic pipe friction.
5. As for the 2 upper jibs, they are on a closed loop system of starboard-port sheets.

Please, keep the challenging questions coming. You will find a place where I have slipped up. (I have done again 2 of the sails for critical errors that I caught)

Hi RossM, sorry but the translation brought back some illogical sentences.
I don't think I fully understand how you want to maneuver the staysail.

I didn't come up with any good ideas for maneuvering the foresail and topforesail despite the presence of the staysail.
I tried to imagine a system but the running rigging would still get in the way even with the sail folded up.

This theme on staysails interests me a lot because I have never used them (unlike jibs for which I had devised my own method).
I'm really curious to see how your system works.

I hope someone can give you more qualified opinions.

The transmitter is a FLYSKY FS-i6 6 channel, connected to FS-iA6B 6 channel receiver, running 6 servos, (one rudder and 5 winches). 1 servo for each channel.

3 channels are running 2 sails each
1 JIB & JIB TOPSAIL
2 FORESAIL & FORE TOPSAIL
3 MAINSAIL & MAIN TOPSAIL 6 sails
2 channels are running 1 sail each
1 JUMBO JIB
2 STAYSAIL 2 sails

8 sails when the STAYSAIL control is complete
5 WINCHES

An interesting concept Ross, 5 servos serving the sails. I have enough problems using all 6 channels on another boat where non essential things are operated on 4 of the channels, so what it will be like trying to sail your boat using all 6 channels I just can't imagine. Tricky to say the least !
Good luck . 😉

The latter Ross. Remembering which control to use for the desired purpose. Each time I went to the lake it would take me at least 30 minutes to remember what to do; sometimes much longer. But then, at my age everything takes longer, and sometimes doesn't happen at all !! 😉

Yes, I used to find it would take 10 hours of operation to get to the point that I didn't have to think about it, just do it. Skid steers and snow plow trucks