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Archive for October, 2019
Posted by FeiJi | Oct 16, 2019 @ 01:33 AM | 1,530 Views
Cut up a perfect new Lighting EPP wing kit into 3 pieces for portability and to carry on my ebike. Was an experiment that worked out pretty well. Kit cost me about $20 so no loss if I failed. The wings are now very stiff, the new wing is lighter than my old one which I had embedded LEDs. I hold the wings together with a couple zip ties. Takes about 5 minutes to assemble it at the field.
All up weight with 64gram 800mah lipo is about 330grams. That includes metal spinner on folding props and a bigger 15amp ESC. The old wing really flaps its wings on a windy day but this wing is very rigid. CG is at 10cm from leading edge. I don't know how anyone can fly with it at the recommended 50mm. Perhaps it is 3D at that point and I can't fly 3D. It is powerful enough with a 3S lipo to move out pretty quick. I fly around at about 40% throttle.

My maiden went ok but on the third flight the battery dropped out the bottom and I flew it down to a landing without any harm. Looked pretty funny flying with the battery hanging below by the wires. Guess that is the inevitable hazard with the battery hatch being on the bottom of the fuselage.
The video is kind of long and drawn out and out of frame sometimes. Maiden plus one flight is at the end. My wife kindly videoed but in portrait mode. I was training her to video my flights but she has already lost interest so will have to self video in future flights.

Very happy with how this wing turned out. I fly at a large university football field and it is perfect for that size field.

Backpackable Lighting EPP Wing (13 min 42 sec)

Posted by FeiJi | Oct 06, 2019 @ 04:05 AM | 1,296 Views
Live and learn I guess. This wing is more versatile than I imagined. I built it according to the designer specs and didn't like the way it flew because I just didn't know how to fly it - almost 3d. Found several videos that built it according to specs and it flies lightly withing a baseball diamond area. I built mine much heavier(almost 300 grams as opposed to 240) and it flies in wind with long graceful loops, rolls and glides. CG can range from 40mm up to about 5mm.

Haven't flown for 6 months until 2 weeks ago and then today. I love flying this plank as it looks like a bird in flight, is easy to control, very predictable, loops and rolls nicely and is a just cool looking wing. Am located now in Kunming, Yunnan, China, the eternal spring city, where there is always a nice day popping up year-round to fly. I just ordered another one of these kits as this one has grown heavy with the LEDs in the wings. The ESC is located outside the fuselage to keep it cool. The little 1908 2050kv motor is a little small and warms up a bit but I haven't burned it out yet. I use a 3s 800 mah because the 2s is fine for poking around but I like to fly faster sometimes. I need to learn how to fly inverted - never learned. Guess I will get out the FMS.

Lighting EPP Plank WIng Oct 2019 (7 min 43 sec)