Yacht SuperMaxi Top Loader Viking

thingiverse

Downloaded some Radio Control model yacht designs. Non of them suited my fancy for building, so I decided to come up with my own. Main Desing principles... No Keel! -> Surf Board / Windsurfer style. Light Weight (relative to size of jib!) Jumpable! Must be able to leave water, fly, and dive into ocean with full recovery tactics available at the helm. Inorder tobe able to jump, the impact of bouyancy must be LOW, rather than high, worst case scenario is a belly slap perfect flat landing, where the centre of this yacht is designined viking style with an anti twist. The better way to land is to land angled of course. Angle of attack can be as low as 80 degrees!!! AND It still sails even at below 90! (cant stear though) Openscad File Included, but you need overrides.scad 54th's coming along. And a Feeling I'm done with ya. 26th: Rudder Control Arms Done, soon, main keelRibs (not actually a keel traditional) 26th 2240: Spinaker almost done. 27th: // Spinaker Issues: /* The outward feed of the spinnaker mast stay pulley rope, can go as a jib stay to the spinnaker. but that is no good cause then ya cant pack it. The spinnaker mast stay rope should go toward the broadstay tension, but this is a long length. , and you still need a tensioner second motor. The total is still 3 motors per spinnaker, so there is no saving in just having 3 motors seperate per corner of jib. As the broadstay rope gets pulled in, the maststay rope is lengthened. you 'could' place this on one spool as a loop, but really, you need something to tension. ,then again maybe not. The jibstay rope def needs its own motor. During packing it, the rope is left exposed on deck. I would rather the jibstay main anchor point be at the front side. Rather than pulling from the mast. ,but if I place the anchor point at the mast I can always place a pulley at the edge of boat later. -> ie, do I want jibbed pulls from the mast or the side of the boat, in low wind: side of boat is better, but high wind centre of boat is better, so again, another servo req. Total of 4 channels per spinnaker (upto), bare min is 2 as looped mast/broadstay + jib. ,3 would be the nice option (one tensioner per corner jib, as it would be typically, with a 4th motor as pulley tensioner) for 2 spinakers (due to incapability to choose a side since I am not on the ship) = 4 channels. Saving a channel via connecting port and starboard jib pulleies as 1 channel? ,but then I cant use both spinnakers at one time in very low wind conditions. Def 8channels just to run the spinnakers is way too much. so far I have Rudder, Massbalance, Mainsail(1 or 2)(can be done as 1 if tensions kept via an idler current in opposing releif motor), JIB tension (siding done via centre pulley), LED(optional of course), + the spinakers comes to a total of 4 + 4 + LED , 9 channels. If its as I want it, it is 8 + 4 + LED = 13 channels! Doesnt worry me, doing it via arduino PWM with custom sensing for MainsailTension. -> and mixing with Massbalance/rudder. Note mixing with massbalance/rudder saves a channel if done onboard without Remote Control, but I want to be able to play with it ashore. Ie, I want todo a quick stear and dive by flicking the massbalance. ie stearing is more appropriate with the massbalance rather than the rudder, especially at very high knots and smooth sailing. ie. the two main controls during stable rigging are left hand massbalance up/down and left/right rudder on right stick. Left hand left right is main sail tension from centre (relative positioning) ,ie when stick at centre, motors are locked holding tension, when stick at degree.dir, motors are in differential movement accordingly. Spinaker control algorithms: Start packed... Switch.on.Unpack = *Maststay motor.pull(till sence unfurled to full) *BroadStay motor.loose(||reverse.lowcurrent) THEN on.maststay.sence.unfurled -> apply tension *Jibstay motor.loose(||reverse.lowcurrent) THEN _user-intervention (stick req (right hand up down)).tension -> NOTE, an algorithm with or without user intervene can/should be on broadstay/jibstay tension as a choice in direction of the spinnaker. This is normally done as (in real life)... choose a loose or tight mix tension on broad/jib main pulleys, then set a tension via a second pulley ,in options as either: *interveneing pulley pulls on jib tension only. *interveneing pulley pulls on broadstay tension only. *interveneing pulley is rigged to pull on BOTH broad and jib tension. *interveneing pulley is rigged to pull on both AND with a direction and to ANOTHER sails tension arangement. (eg, a bellow amidst, 2 bellows amidst and to crown or mast, bringing total of 3 extra sails under the control o 1 rope) This is ofcourse all to complicated on an RC yacht, BUT a rigging onshore as an option could have a bellow sail or 2 rigged for low wind conditions and controlled on the rightupdown stick as a mixed mechanical setup. Problem: I have TWO spinakers. I have to be able to SELECT the spinaker command to apply to right stick.tension. Selections are: 1 spinakker 2 spinakker at same time. The spinaker NEEDS tobe able tobe controlled as quickly as a rudder, so I have no option here. Need tobe able to reliably pack and unpack it too for tacking and windspeed changes. eg. If I want to stear into starboard, with a toward port wind while the port spinnaker is up, I cannot. Spinaker has to not only go loose but be packed. Which brings me to option B for DUAL Jib Motor rigging, allowing me to not only apply tension to spinnaker jib, but to move it to the broadstay, leaving it loose flapping. (technique used to quick tack). Personally for an RC boat, this is too much again. Similar technique can be achieved by pulling in the broadstay and leaving the jibstay very loose, enough for it to get pulled into the broadstay. But ofcourse, this is pretty much what the packing routine is anyway. ie. 2 types of spinnaker packing can be done... Typically most of the midship sail corners go in first leaving the jib corner to go in with the maststay corner. But a half method could be done, where the jibstay is very loose and gets caught in the broadstay, going in with the broadstay corner at the same time. In reality though it would never happen. You need a human to bring the rope in too the broadstay inorder for it to get sucked in. */