FTScratchBuild
Welcome a real flying version of the iconic aircraft from the cartoon Tale Spin—the FT Sea Duck! The Sea Duck is a twin-engine 3-channel airplane that maneuvers easily on the water and flies great from a position on land.
Before building the Sea Duck, build both of your power pods and center your three servos. This build does not require linkage stoppers.
Start by building the wings and fuse top. Remember to remove the top wing surface where the nacelles will mount.
After assembling the main fuse top, fold up and glue the window pieces one at a time. Then slide the top fuse into the wing.
Remove the nacelles and mount them on the fuse/wing. Route the power distribution cable through the wing and route the ESCs.
Build the tail and rudder. Remember to test fit the tail assembly to the nacelles before gluing so you have a good fit.
After installing your pushrods and control horns, install your servos. Be sure to center your servos before installing them.
Test fit the control horn, then remove it and break the ailerons free. After beveling and reinforcing the ailerons, reinstall the control horn and glue it with the aileron and servo centered.
Connect your electronics and ensure that the motors without props are turning the right way.
Assemble the lower fuse section and glue it onto the upper fuse. Install and glue the rear door.
Test fit and mold the engine cowling before gluing into place to ensure you are happy with the fit.
Build the pontoon and install onto the wing. Brace the pontoon with popsicle sticks.
Install the battery so the plane balances on the reference holes on the wings. Check your throws, install the props and you’re ready for the maiden!
Happy flying!
CHECK IT OUT: FREE DOWNLOAD for Phoenix Flight simulators: Become a confident pilot by flying some of your favorite FT planes, including the FT Sea Duck.
FT SEA DUCK PLANS
STORE LINKS
FT SEA DUCK SPECS
- WEIGHT WITHOUT BATTERY: 2.45 lbs (1111 g)
- CENTER OF GRAVITY: 2.5” (64 mm) from leading edge of wing
- CONTROL SURFACE THROWS: 16˚ deflection – Expo 30%
- WINGSPAN: 56 inches (1422 mm)
- RECOMMENDED MOTOR: 425 sized 1200 kv minimum
- RECOMMENDED PROP: 10 x 4.5 prop (3s) or 9 x 4.5 (4s)
- RECOMMENDED ESC: 30 amp minimum
- RECOMMENDED BATTERY: 2200 mAH 3s minimum
- RECOMMENDED SERVOS: (3–4) 9 gram servos
Other videos worth checking out:
Scratch building without knives!
You guys are awesome!!
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The Sea Duck is my favorite plane of all time. I just finished building a second one (unfortunately I crashed the first one).
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While the 3-wire cable does supply power to the receiver, more importantly it is also the signal from the receiver to the motors. If you did not plug these in there is no way for the ESCs to know when and how much power to supply to the motors
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Is there a posibility to know the equivalent of size 425 motor in Turnigy motor size.
Is it 2836 1500kv.
Thanks.
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Thanks. :)
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Eduardo
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Gryf
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https://www.youtube.com/watch?v=fKTtvHWW-JU
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Maiden will be tomorrow. Taxi test today on grass with inadvertent lift off, stall and crash but no damage. Next a water taxi test with the plane stranded in the weeds and me sinking in ankle deep muck to retrieve.
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2x A2212 1400kv Motor Specification:
KV: 1400
Max Efficiency: 80%
Max Efficiency Current: 4-10A (>75%)
Current Capacity: 12A/ 60s
No Load Current: 0.5A
Number of Cells: 2-3 Li-Poly
Motor Size: 27.5x38mm/1.08''x1.5''
Shaft Diameter: 3.17mm/0.12''
2x 30A Brushless ESC Specification:
BEC: 1A / 5V (Linear mode).
Output: Continuous 30A, Burst 40A up to 10 seconds.
Input Voltage: 2-3 cells lithium battery or 5-9 cells NiCd/NIMh battery.
Max Speed: 210,000rpm for 2 Poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM. (BLM: BrushLess Motor)
4x 9g SG90 Servos
Battery parameter:ZOP Power 11.1V 4200mAh 40C
Capacity:4200mAh
Size:25*43*135mm
Plug Style:XT60 Plug
Weight:312g
Lipo charger Description;
Microprocessor controlled
Built-in balancer for lipo battery
High-power and high-performance circuit
Can charge Li-ion,LiPo,LiFe 1-6 cells,and Ni-Cd,NiMH 1 -15 cells
This item is for a rapid charger/discharger for all kind of battery of RC hobby
Dual Power, built-in AC adapter
Undefined Large range of charge currents
Store function, allows safe storage current, and data storage (Store up to 5 packs in memory)
Battery break in and cycling
Built-in temperature sensor
Note:Temperature cable is not included.
Separate voltage detector for balance charge mode.
Max. charge power 50W
Max. discharge power 5W
Pb battery voltage : 2V-20V
Charge current range : 0.1-5.0A
Discharge current range : 0.1-1.0A
Li-Ion/Polymer cell count : 1-6 series
NiCd/NiMH battery cell count : 1-15 cell
Current drain for balancing Li-Po : 300mAh/cell
Dimensions : 136 x 141*34mm
Package:
1 x English manual
1x 100-240V Power Supply Cable
1 x IMAX B6AC LiPo battery balance charger (Built in Power Supply)
Transmitter and receiver;
FlySky FS-Th9X 2.4Ghz 9 Channel Digital Transmitter and Receiver Radio System
Thanks, Joey
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