Classic Designs > Classic Planes
Jetco Dolphin
Dave_Trible:
Hello Steve. I've had some experience with the design-it's sweet! BUT Mine had the good old Fox .35 no muffler (6 ounces) which was plenty of power and balanced about right. Lew McFarland designed the airplane for the Fox (6 ounces no muffler). Me thinks the FP is WAY too much power and weight for this small airplane. With muffler it will be crazy nose heavy . They have been adequately flown with as little as a powerful .19. I'd sure be looking for another power plant.......otherwise I think you will struggle keeping the speed down with an engine that only knows "giddy up" and too heavy on the controls for much maneuvering .
Dave
Steve Maines:
--- Quote from: Dave_Trible on November 12, 2023, 10:37:14 AM ---Hello Steve. I've had some experience with the design-it's sweet! BUT Mine had the good old Fox .35 no muffler (6 ounces) which was plenty of power and balanced about right. Lew McFarland designed the airplane for the Fox (6 ounces no muffler). Me thinks the FP is WAY too much power and weight for this small airplane. With muffler it will be crazy nose heavy . They have been adequately flown with as little as a powerful .19. I'd sure be looking for another power plant.......otherwise I think you will struggle keeping the speed down with an engine that only knows "giddy up" and too heavy on the controls for much maneuvering .
Dave
--- End quote ---
Hi Dave - the Dolphin came with the OS FP35 mounted and I just assumed this was a 35 size model. I actually have a Fox 35, with the Fox muffler. It's a but grubby, but seems to have good compression ans 'feels' fine when flicked over with the yellow prop I installed.
Dave_Trible:
Steve I sure do believe that will be a much better suited choice for the Dolphin. It will fly the pattern on about 3 1/2 ounces of fuel which also helps the fuel load. The FPs are fine engines but can easily pull an airplane 30% larger than the Dolphin and even then you have to go to a flat pitch prop and let it run at pretty close to full blast since that's what they were designed to do. I haven't tried the retro fit of FP to Fox so not sure what you will need to do to the airplane to mount it but that's for sure what I'd do....
Dave
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