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Model T

Mike.

Pretty Rad if you ask me!

I don't see why he added 2 Lbs of ballast in each hull. It would be better to put the ballast on the windward hull and maybe depower the rig by flattening the sails. Nonetheless, it's a good-looking toy.
David Ho
TheMightyHobie18 1067

Interesting that he has used double keels.

All the Model Cats I've ever seend documented use a single swinging keel that "rests" on the leaward hull (or maybe on a prodder) to privide the righting moment so ir takes virtually no wind to fly the hull and then the keel becomes "engaged"

"All the Model Cats I've ever seend documented use a single swinging keel that "rests" on the leaward hull (or maybe on a prodder) to privide the righting moment so ir takes virtually no wind to fly the hull and then the keel becomes "engaged"

Scooby, if you could be so kind as to attach a pic/drawing of what you just described, I`m battling to imagine it.

Cheers
Steve

I've got a model cat that's 3 feet long and uses US One Meter sails. It has WAY too much power and the sails have a hooking problem that keeps the boat from pointing well. I struggle with it because it is so light and the sailplan so tall that it pitchpolls in a heartbeat. I've considered adding a servo with a long arm in the center of the "trampoline" with a counterweight at the end of the arm. It could be rotated to the aft corner, rear beam, or either hull to help give a little more righting moment. As it is, it accelerates like a bullet but it is hard to control.

When I get some more time to mess with it, I will probably reduce the sail area, make new sails, and try the counterweight thing controlled by a knob on my radio.

Sorry no piccies…..

Imagine a keel attached to the bottom of the front beam by a hinge which can only operate in the Port/stbd plane - directly under the mast

When the boat fly’s a hull, the keel will stay vertical (in the water) until the side of the keel fin touches the leaward hull. At this point the keel will start to provide righting moment as increased heeling will push the keel to windward.