SAIL CONTROL AND ADJUSTMENT SYSTEMS FOR SCALE MODELS

Started by AlessandroSPQR
55 replies 118 likes Last activity: 5 days ago
#6 69
Next up will be bench test of the main boom. The excitement there will be the triple block that the main sheet runs through, the same as full sized BLUENOSE. The block is walnut wood, the sheaves are birch. The sheet travel length is about 120 cm.
Force nothing, waste nothing, leave nothing undone
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#5 68
This was just the test on the bench, but it is radio controlled.

sail from the previous video is at the top of the photo
servos & switches near top,
receiver left side below it,
motors batteries, right below,
receiver battery, blue,
double drum winch, lower right
Force nothing, waste nothing, leave nothing undone
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#4 65
Alessandro

I don't have the capacity to move any larger video but this is it under radio control
Little stick in the middle is the position of the leech of the foresail
Tall stick is where the main mast will be
Stick on the other side is the luff of the foresail
Force nothing, waste nothing, leave nothing undone
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#3 65
Alessandro,

Firstly, I am using 5 winches. 3 winches are single drum. 2 are double drum.

The single drums are:

1) jumbo jib, lowest of the 3 jibs
2) foremast winch
3) mainmast winch

These operate in the conventional manner that you are familiar with, a single sheet to the boom. The JUMBO JIB on the Bluenose has a boom. Note that, with the winch motors all the same, the single drum design is much bigger than the double drum design. The single drum gathers up and releases much more line than the double drum, just as you would expect.

The double drums are the special use drum. The sails controlled by these 2 winches are high above the deck. The sails aloft must go AROUND another object to move from side to side, (unlike the single drum boom controlled sails lower to the deck). The JIBS winch must control 2 sails, JIB TOPSAIL & JIB AROUND the luff of the JUMBO JIB below them. The JIBS winch will carry 4 sheets
1) JIB TOPSAIL port sheet
2) JIB TOPSAIL starboard sheet
3) JIB port sheet
4) JIB starboard sheet
The good part is that the travel distance is short, so the drum can be small. Yes, in this case, one drum takes up a pair of starboard sheets while the opposite drum releases the pair of port sheets, and vice versa when the motor is reversed.

The last double drum is the one that you inspired. The STAYSAIL winch. This is the most complex of the winches. The STAYSAIL winch must GUIDE the luff of the STAYSAIL back from the FOREMAST, along the side of both FORESAILS, behind both FORESAILS and forward to the FOREMAST, on the other side from it's start point. I believe that in my build blog there is a video demostrating the movement of the STAYSAIL, being tested on the bench.
This is alot of information to absorb. Let me know which part is confusing and I will clarify further
Force nothing, waste nothing, leave nothing undone
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#2 63
Alessandro
Yes, I will reproduce the earlier photos and description here, shortly.
For now, today's work
Force nothing, waste nothing, leave nothing undone
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#1 82

SAIL CONTROL AND ADJUSTMENT SYSTEMS FOR SCALE MODELS

This topic has been covered frequently, but often in a sporadic or piecemeal fashion.

We recently discussed it in a thread—titled "Sailing ship 'full-rigged ship', 'Af Chapman', now 'Dunboyne'"—that was actually unrelated to this specific subject (I’ll include a link at the end of this post).
While talking about the Af Chapman, we went off-topic and began discussing sail control systems for RC sailing models.
Ross contributed some very interesting ideas.
I’d hate to lose that information; in fact, I’d like to be able to find it easily when I need it. Buried in that other thread—along with other bits scattered here and there—it would be hard to track down.

That is why I want to use this thread to discuss "systems that regulate and control the sails of RC sailing models, ranging from simple sloops and ketches to schooners and full-rigged ships."

Contributions from anyone who has built—or is currently building—an RC sailing model would be greatly appreciated.

Since the subject isn't exactly simple, I encourage you to include sketches, photos, and videos alongside your written descriptions whenever possible.
Personal experiences are incredibly useful, but so are ideas that haven't yet been put into practice.

I’ll pick up the conversation where I left off in the aforementioned thread.
I had prepared some diagrams and was about to post them there, but I’d prefer to put them in a dedicated thread; it seems more logical and useful.

Ross, if you’re willing, could I ask you to repost the photos you shared there, along with a brief description?


https://model-boats.com/forum/169185
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