- Type
- Build Plan (PDF, AI, etc.)
These are plans for a "giant" size Sea Duck, which I call the Sea Monster.
drive.google.com
The plans are simply 162% of the original, reformatted a bit for convenience. The plans fit and print nicely on 7 sheets of 48"x36" paper. The wings, the fuselage, the horizontal stabilizer, and the booms can be built using very convenient number of sheets of foamboard without a lot of waste. The finished product ends up with a 94" wingspan. It is large enough to impress your friends but can still fit in your car. It is really the perfect size in my opinion.
Except for some doubling up in some areas (such as the fuselage, the tail, the booms, etc), the airplane builds just like the original, with hot glue, etc. The plans reflect the outer features of the airplane and the doublers are simply added on the inside. I would recommend a stiffener in the horizontal stabilizer, which worked fine but got squishy over time when exposed to water. I added a carbon fiber strip to the leading edge to address this. I would also recommend some heavy duty packing tape on the bottom of the fuselage and the wingtip floats. My fuse has proven quite durable with the tape but my wingtip floats are a bit chewed up because initially I had not added the tape.
I used 3 sticks of 1/2" square poplar stacked vertically for the wing spar. The outer sections of the wing then key in to the center section with a single bolt at the motor mount so they can easily be removed for transportation. Josh Bixler and David Windestal demonstrate the approach here: https://youtube.com/clip/UgkxSrQ912_BqNgRwH1uEmQwLiHDi6crhDHZ?si=nt1RQcOIPkVNyhdr
I fly the Sea Monster on a 6S 5000 lipo with two Sunnysky x3520 v3 560kv motors and 12x6 Master Airscrew 3-blade propellers. I get about 6 minutes of flight time on this set up. I have flown with 2 6S 5000 lipos in parallel but got only about one extra minute of flight time and felt that the performance was better with the lighter weight.
I have flown this on grass and on water and can confirm it is a very gentle flyer. See it in flight here:
I'm hoping to see more of these in the future and am hoping Flite Test will release a kit!
162% FT Sea Duck 48x36 Parts Only.pdf

The plans are simply 162% of the original, reformatted a bit for convenience. The plans fit and print nicely on 7 sheets of 48"x36" paper. The wings, the fuselage, the horizontal stabilizer, and the booms can be built using very convenient number of sheets of foamboard without a lot of waste. The finished product ends up with a 94" wingspan. It is large enough to impress your friends but can still fit in your car. It is really the perfect size in my opinion.
Except for some doubling up in some areas (such as the fuselage, the tail, the booms, etc), the airplane builds just like the original, with hot glue, etc. The plans reflect the outer features of the airplane and the doublers are simply added on the inside. I would recommend a stiffener in the horizontal stabilizer, which worked fine but got squishy over time when exposed to water. I added a carbon fiber strip to the leading edge to address this. I would also recommend some heavy duty packing tape on the bottom of the fuselage and the wingtip floats. My fuse has proven quite durable with the tape but my wingtip floats are a bit chewed up because initially I had not added the tape.
I used 3 sticks of 1/2" square poplar stacked vertically for the wing spar. The outer sections of the wing then key in to the center section with a single bolt at the motor mount so they can easily be removed for transportation. Josh Bixler and David Windestal demonstrate the approach here: https://youtube.com/clip/UgkxSrQ912_BqNgRwH1uEmQwLiHDi6crhDHZ?si=nt1RQcOIPkVNyhdr
I fly the Sea Monster on a 6S 5000 lipo with two Sunnysky x3520 v3 560kv motors and 12x6 Master Airscrew 3-blade propellers. I get about 6 minutes of flight time on this set up. I have flown with 2 6S 5000 lipos in parallel but got only about one extra minute of flight time and felt that the performance was better with the lighter weight.
I have flown this on grass and on water and can confirm it is a very gentle flyer. See it in flight here:
I'm hoping to see more of these in the future and am hoping Flite Test will release a kit!