Lisa Rolls Out Second Akoya Prototype

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Lisa Aeronautics has started flying the second-generation prototype of its sleek Akoya, a multi-surface, would-be LSA. The Akoya is designed to take off and land on runways, water or snow. The most visible change to the new airplane, PS1—for Pre-Series 1, replacing the Pre-Series 0 aircraft—is in the seafoils, which are two canard-like wings extending downward near the cockpit for water stability. In PS0, the seafoils were canted significantly down, but Lisa’s pilots found the long landing gear required to keep the seafoils away from the runway excessively reduced forward visibility on the ground. The Akoya has a traditional, tailwheel landing-gear configuration. The new seafoils are essentially level, which allowed Lisa to shorten the landing gear on PS1 for visibility similar to a tricycle-gear aircraft.

Lisa plans to seek approval to sell the Akoya in the United States as a light-sport amphibian with a maximum takeoff weight of 1430 pounds and a useful load of about 550 pounds. Marketing Manager Vanessa Troillard says the basic empty weight of the PS1 is 900 pounds, which leaves around 20 pounds to be trimmed in order to meet their useful load target. The fifteen-person French company hopes to launch production next year, with U.S. approval to follow in 2019. 

UPDATED: A previous version of this article incorrected stated the empty weight of PS1 as 990 pounds. It is 900 pounds.

Comments (5)

A hundred and ten pounds is a lot of weight to trim off of a thousand pound airframe. This is just another example of why the LSA weight limits need to be revised. LSAs are not hang gliders or ultralights and the FAA should reevaluate their current standards to allow the category to grow (pun intended).

Posted by: John McNamee | August 22, 2017 12:09 PM    Report this comment

Structure is safety. I agree with John that basing it on an arbitrary number (just below a C150) introduces problems for both longevity in a training environment and lack of stability in gusty conditions. Light training aircraft (like C172's, etc) have proved their safety and should be included in "sport" amateur pilots.

Posted by: Mark Fraser | August 22, 2017 7:40 PM    Report this comment

I'm with you guys. For many years, I operated my C172 out of Mojave, CA where the winds were incessantly strong. I have actually landed it and then had a hard time taxiing it back to the hangar. I cannot imagine trying to do the same thing with an airplane lighter than a C150 and with a tail wheel to boot. I can picture many fine designs if the LSA gross weight were changed to a nice round 2,000 pounds. This airplane isn't one of 'em. From the pic, it appears short coupled ... not something you want in a tail dragger.

If the FAA is truly all about "safely," ... increase the LSA weight and allow this segment to be a viable entry level segment of GA.

Posted by: Larry Stencel | August 23, 2017 1:25 AM    Report this comment

I'm interested in seeing how that does on the water. That hull doesn't look particularly hydrodynamic, but on the previous version I assumed the sea foils would counteract that some, like a hydro-foil. With this version I'm not sure how well that would work.

Posted by: Ryan Leeward | August 25, 2017 3:43 PM    Report this comment

I'm interested in seeing how that does in the water, as the hull doesn't look particularly hydrodynamic. With the previous version I assumed the seafoils would work like hydrofoils, but on the new one it doesn't look like they stick down far enough to be effective.

Posted by: Ryan Leeward | August 25, 2017 3:46 PM    Report this comment

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