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My 3DFoamy SuperXtra

Old 04-01-2006, 11:22 PM
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Wazmo
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Default My 3DFoamy SuperXtra

It's taken a while, but it's finally finished. Powered by a Hacker A20-20L with X-20 ESC and TP 3S 2100. RX is a GWS Naro 6ch and servos are Blue Bird BMS-371's (9.4g each).

I didn't like gluing the pushrod guides to the fuselage, as it would make the pushrod curved. So, I made standoffs from scrap foam and glued the guides to the end of each standoff, so the pushrod would be in a straight line.
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Old 04-01-2006, 11:42 PM
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marzo91
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Default RE: My 3DFoamy SuperXtra

Flight report?
Old 04-01-2006, 11:47 PM
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Wazmo
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Default RE: My 3DFoamy SuperXtra

Haven't flown it yet. Plan to tomorrow afternoon.
Old 04-03-2006, 09:34 AM
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Wazmo
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Default RE: My 3DFoamy SuperXtra

I flew it yesterday. Power was excellent. A fellow club member said, "It doesn't really take off, it launches." Control response was excellent with 60% expo on all surfaces. Roll rate was very fast, about 1440 degrees (four revolutions) per second, at half throttle. It was able to loop within a little more than the length of the fuselage. At low rates (33%, 0 expo) it was very smooth. The CG was too far forward, which caused substantial pitch towards the canopy in knife edge. There was also some roll coupling in knife edge, which seemed to be reduced by moving the CG back. I wasn't able to move the battery far enough back, so I will have to move the Velcro attach point and strap slot reinforcements. With the battery, comprising more than a third of the total weight, on one side of the fuselage, it's heavy on that side which is causing a wing to drop in loops and making hovering more difficult. I'm going to try adding weight to the opposite wing tip to balance. I will probably also add the CF landing gear with large, lightweight wheels for use on grass.
Old 04-03-2006, 10:07 AM
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ben beyer
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Default RE: My 3DFoamy SuperXtra

Was this your own design or where did you get it?
Old 04-03-2006, 10:35 AM
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Wazmo
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Default RE: My 3DFoamy SuperXtra

It's a laser cut kit made by [link=http://www.3dfoamy.com]3D Foamy[/link]. All surfaces are made of three layers of foam laminated together, with five layers on the wing leading edges. The fuselage has CF strip in the center layer and the wing has CF tube spars embedded in the center layers.

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