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PostPosted: Sat Oct 27, 2018 9:36 am 
Site Rank - Deck Hand

Joined: Tue Aug 21, 2018 10:30 pm
Posts: 23
I plan to get a Bixpy for my Oasis. I generally use it solo, and it is moored permanently in the water in the harbor. The plan is to use it in the unused rear drive well as an aid when I venture out solo into the ocean. The local hobie dealer has sold several of these and indicates good results from their customers. I have talked with one guy on a 13’ Revo, in the harbor, who seemed extremely satisfied.

PostPosted: Sun Nov 04, 2018 10:52 am 
Site Rank - Captain

Joined: Fri Jun 06, 2014 8:12 pm
Posts: 120
More weight translates to a boat sitting lower in the water and it takes more effort to push it along. I had a 8 ft inflatable with a 15 HP outboard and when I bought a 14 ft inflatable that weighed twice as much the 15 HP motor actually moved the larger inflatable at a higher speed as the boat did not sit as low in the water with the increase in flotation and load support there was less drag overall with the larger boat.

Same effect with a displacement hull that has to move against the water as compared to a "sled" that gets up out of the water and reduces the drag involved. With a kayak one has a displacement hull, especially with people and gear, and any propulsion is going to take more energy as speed increases. A battery also has a limited amount of output per unit of time, even a lithium ion type. There is going to be a sweet spot in terms of speed and time with respect to discharge which the Torqeedo's CPU tries to calculate in real time.

Put a two hundred pound person in a Revolution 11 and I would expect greater power consumption than the same person in a Revolution 16. A TI adds the drag of the amas and so is going to take more power than either kayak. The TI is designed to be powered by two people to compensate for the increase in drag. For the TI I would rig up a standard trolling motor and add a sealed battery and pay less than $500 to do so.

But with a TI I would be using sail power once away from the dock or launch area and only use an electric motor to deal with strong current and augment my pedaling with the Mirage drive if the wind fell below 3 knots. In San Francisco bay for example and outgoing tide can generate 7 knot currents and with no wind, having to pedal a kayak against the current would be extremely difficult and a Bixby or other electric drive would be most welcome.

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