Hi Andy,
I tried to send you App 7 from Mr. Ivor Bittle's booklet on mizzen sail control. Unfortunately, his site no longer exists, his models have been sold. So I decided put part of the article here.
.
So I put short excerpt here.
If the mizzen left is on the rudder channel and is mixed with the mainsail by mixing THRO into AIL and the rate set to 50%, it can be made to move backwards when the main is sheeted out. In a similar way the mizzen right servo on the remaining channel can be mixed using another mix so that its arm also moves backwards when the mainsail is sheeted out. This sheets out the mizzen and is shown in 1. When the main, ie THRO is sheeted in both servos can be move forwards by giving them a 50% rate as shown in 2 to sheet the mizzen in. In this way both servos move forwards together or back together when the main is sheeted in or out. If the sheeting cords are set up correctly for length the mizzen can operate in conjunction with the other sails of the rig and help to drive the barge.
Now we can make provision to set the mizzen to windward. This involves letting the aileron stick have an input to the servos. Go to THROW ADJUST and give the AIL stick 50% travel in both directions. The two 50% throws ensure that the servo cannot overrun. Operation of the aileron stick will add 50% throw to the mizzen left but will not move the mizzen right. The last mix can be used to mix AIL into the mizzen right channel which must be set to either +50% either way or –50 % either way as required. Then the mizzen can drive the barge in normal sailing and can be set to windward during a tack. In addition the right hand stick can move to left or right to set the mizzen independently of the main.
The mizzen can now be set to windward to help the barge tack. Normally the barge would tack from beating close to the wind. One would initiate the tack by bearing away a little to increase speed and then turn to rudder to make the head turn to windward. The mizzen can be set to windward using the AIL stick to help with the tack by weather-cocking. It adds to the authenticity of the model as a scale model.
I am beginning to think that the balance of the barge can be improved by using this facility to alter the angle of the mizzen independently of the main when needed. It may be more important than being able to set the mizzen to windward for a tack. But I need a steady wind to find out for certain.
………………………………..
To all .. I tried to copy the booklet some years ago , unfortunately not all the images were copied into the text. Maybe one way would be via Dropbox .I had chance to wrote directly to the Author, and then tested the settings with mixes on the Turnigy 2.4GHz transmitter. It works, but above all there is a problem with the length of the levers on the individual servos, in addition, it takes up space in the model. The short levers were not functional. Unfortunately, these sites no longer exist today, the Author probably died.He had several articles at >Modelbarge .info < site, sorely …these sites do not exists too ..
Tom
Edited By tomarack on 08/08/2020 21:33:49