: Build Log
Popfly 2 Night Flyer
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Feb 15, 2012
, 09:22 PM
United States, TX, Lubbock
Joined Jan 2001
Thanks Phil and Lee.
Now to back-fill a little build info: I always seem to make at least one bone-headed move during every build I do. The Popfly was no exception. After tinkering with the motor mount and getting it squared away, I decided to test a couple props to see which I should use. So I placed (not secured...just placed) the tray into its slot on the airframe and hooked the ESC to my servo driver and wattmeter. All was fine for a few seconds and then I saw the tray start to creep out of its slot. Before I could shut down the throttle, the whole thing jumped forward and the prop chewed up the starboard trailing edge. After a few choice words, I grafted in a scrap piece a foam and it was good as new...or close enough. In the end, the worst damage was the destroyed GWS prop. I can live with that.
Other notes are embedded in the photo captions. I hope to maiden it in the next few days.
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This is what happens when you run up the motor without making sure they tray is secured. It could have been much worse.
Here's the same section after grafting in a scrap section of depron.
For pushrods, I used 1/16" carbon rods with music wire z-bends CA'd to the servo end. The control horn end is bare carbon fiber into an EZ connector. I just have to be careful not to crush the rod when I tighten the set-screw.
Here's a close-up of the Rimfire-250...a neat little motor. It's my new favorite speed-400 replacement. I cut a lite ply firewall that is attached to the back of the tray.
Here you can see how big the prop clearance is by moving the servos outward one rib. That's a 5" prop shown. It will fit up to a 7" prop. I think this opens up numerous motor options or even gearing for the 12mm motors.
I placed the Futaba 7C that I'll use to control the Popfly2 under the leading edge. This gives you some idea of the light output from the front LEDs.