After a long and mostly rainy winter, the weather allowed me to bring Alcatraz, my renewed scratchbuild twin floatplane, back in the air.
Note: if you cannot watch the video due to copyright on this amazing music by Woodkid, use this link
The previous fuselage was made of 3mm Depron but due to its hard nose down stall attitude, I crashed it by landing on a pound. Yes water can be hard!
Specifications:
- New fuselage is made of 6mm Depron
- Motors are two HK DST-1200
- ESC are two HK 20A Blue Series. I've epoxied a heat dissipator on each of them to cool them enough in the fuselage and to make the waterproof
- Propellers are two 3 blades 8x4 GWS
- Battery is a Turnigy 3S 2200mAh 25C
- Servos are two Turnigy 9g servos
- Rx is a HK 6Ch V2
- Tx is a good old T9x with Open9X
I'm pretty happy with it. I have so far set the max throttle range to 75% otherway it was too powerfull. I'll add now one right and one left 8x4 two blade APC style props in order to remove gyroscopic effect of them.
Great fun for this summer :)
EDIT: Below you can find more pictures of the model with some dimensions. If you need a specific dimension, don't hesitate to ask.
All the dimensions are given in mm, as for everywhere else in the world ;))
The wing has a dihedral of about 5°.
The wing is made of two pieces of foams cut with one main spar of ply wood. It is reinforced in the middle with some light glass fiber. I don't know the profile, but you can guess it from the picture below.
From the top, you can have the main dimensions of the fuselage
The side dimensions of the fuselage, you can measure them from the picture below, keeping in mind that total length is 917mm. Note bis: the image is at the scale 1:1 if you click on it to enlarge it ;)
Finally, you can find a few details of the construction below.
The motor mounts
The inside of the fuselage. Note that the two ESCs are epoxied with radiators on them and bind to the wing holder. In case of some water inside the fuselage, they will always stay out of the water level. I have tested it in normal configuration and also upside down...
The Rx is also hold with velcro at a certain height on the side wall.
The battery goes pretty much to the front to keep the CG at the correct location.
The two 9g servos are in the back.
Finally a detail view of the decoration, contribution of my girlfriend to my hobby :)
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