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Posted by FeiJi | Jul 11, 2016 @ 07:37 PM | 870 Views
Haven't flown anything for a year now. Back in china with no planes or radio but I did buy a new charger for my robot projects and after the summer holiday will start flying something on the mountain behind my school.
Pictured is the small charger that I got for $32. I have had the bigger brother for about 4 years and it still works great.

Also here is a great video about a full size racer that will use contra-rotating props and electric power.
Electroflight | Fully Charged (17 min 43 sec)

Posted by FeiJi | Feb 18, 2016 @ 01:22 PM | 2,015 Views
Couple of pictures from an air show about 4 years ago in Michigan.
I got to fly in a T-6 about 15 years ago in Kissimmee Florida where the pilot would let me fly the plane for about half an hour doing loops and rolls - the best amusement park ride ever.
Posted by FeiJi | Dec 21, 2015 @ 08:53 PM | 2,276 Views
Wow. This is historic.

Historic Landing of Falcon 9 First Stage at Landing Zone 1 (1 min 45 sec)

Posted by FeiJi | Dec 21, 2015 @ 04:55 PM | 2,108 Views
Wow what an ugly number - going to to take a whole wing or fuselage to write it.

Go here to register and get your 5 bucks back if you do it in the next 30 days.
https://registermyuas.faa.gov/
Posted by FeiJi | Dec 18, 2015 @ 06:09 AM | 2,776 Views
I think registration is not a bad idea - because of the sales of so many multi-copters this holiday season to people who have absolutely no flying skills - what can one expect? There will be incidents - like the infant blinded by a copter, who by the way was an experienced pilot but obviously not experienced enough to know not to fly around babies. (http://www.dailymail.co.uk/health/ar...ball-half.html). If this can happen to an experienced pilot - imagine what will happen to an inexperienced one who could just run away from an incident without accountability.
Registration is a good idea - because of the idiots who have no idea how to fly. I'm getting in line (online) for registration.

Here's a funny thought. A lot of rc pilots will be crying and complaining about registration but I'll bet when I look at their builds and blogs in the future their aircraft will have nice big bold registration numbers on their planes (not on a slip of paper inside the fuse).
Posted by FeiJi | Oct 07, 2015 @ 09:06 AM | 2,754 Views
I need someone to make me a gyroscope rotor like the attached photo. Needs to be about 5 inches in diameter and half inch thick and the center hole would fit a prop adapter (l need to get size of the adapter yet). Material could be aluminum, brass or steel. Please pm me your price. Only need a one-off but perhaps a couple more in the future.
Also attached pdf of specs.

Update: found a source to make the rotor for me for 105$.
Posted by FeiJi | Aug 06, 2015 @ 07:36 AM | 2,708 Views
I flew this asymmetric tailed flatplate delta and it has an obvious flight behavior - can you guess what it is?

Rolls great to the right but if try roll to left it death spirals. Too much drag to the left I guess.
Posted by FeiJi | Aug 01, 2015 @ 08:34 AM | 3,271 Views
Back from China now and no access to cheap EPP foam so resorting to Dollar Tree foam. Don't know AUW. About 20" WS. 1800kv motor with 7x5 prop and 1000mah lipo. Flies ok , nice roll to right but not to left because am using paperclip control rods and they give sloppy control. Going to get little bike spokes and beef them up but not bad for an hour of work, at least am flying.
Fin is asymmetric but seems ok, dont think it affects weird roll to left but will find out when I replace rods.
Posted by FeiJi | Jul 26, 2015 @ 09:18 PM | 2,823 Views
Someone may have missed seeing this concept delta(s) video from last year.
Future Concepts - The Transformer (0 min 48 sec)

Posted by FeiJi | Apr 26, 2015 @ 02:23 AM | 3,721 Views
Well my hatcam worked but couldnt be sure where it was pointing so made this adapter for my glasses and it works quite well. An adapter would make a nice 3d printer project as mine is a little heavy.

Video is some noodling around with my new plank wing. Flew over 12 minutes with many takeoffs on a 2200mah lipo. Going to see if I can break 20 minutes on a single flight.

Boneyard Plank EPP Wing (12 min 49 sec)

Posted by FeiJi | Apr 24, 2015 @ 01:56 AM | 3,872 Views
Finally after screwing up the fuselage angle and flying a loop which forced me to dive for the ground to avoid being hit,I got it flying. It takes very little powerfor takeoff and cruise and is easy to control.
The video is just a few cuts of takeoffs because my hatcam was askew and I took picutures of empty space.
Boneyard Plank EPP Wing (0 min 34 sec)

Posted by FeiJi | Apr 17, 2015 @ 11:02 PM | 4,819 Views
Working on a plank using 9mm epp foam laminated with copyshop laminate and it also has a carbon fiber pole frame and spar. Should be stout enough yet still plenty light. I tried to make it without the front middle section but just couldnt get enough weight forward to balance. Now have lots of space to play with cg. Also it is a prop in the slot configuration as if that is not obvious. Should be very noisy but I'm in china where it is already noisy.Going to add a vertical stab on this one. I love how planks fly.
Posted by FeiJi | Mar 15, 2015 @ 03:04 AM | 5,919 Views
Here is a neat little poster I got here in china in a bookstore of the P51 B.
Unfortunately it is printed on brown paper so hard to read but I took some closeups for you aficionados.
Posted by FeiJi | Feb 19, 2015 @ 08:22 PM | 5,625 Views
Getting 15 minute+ flights from my 40" wing.
AUW is 750 grams but 120 of that is dead weight in the nose under the battery. So I could replace that with another 2200 3s lipo and get 30+ minute flights but that would tax my neck.
Motor I think is 1800kv, 40amp esc 7x5 prop.
Spars are fiberglass fishing pole sections, very light and strong.
Wing was then covered with laminate film. Very strong and flies very well.
Posted by FeiJi | Feb 05, 2015 @ 01:56 AM | 6,017 Views
Just some noodling around with my new BoneYard 6 40" EPP wing with big tube spars. No fins. No expo - I like my sticks touchy. Not a good place to fly, too many obstacles.
40 Inch EPP Wing with Big Tube Spars - Noodling Around the Sky (4 min 59 sec)

Posted by FeiJi | Jan 17, 2015 @ 08:29 PM | 5,625 Views
My first hatcam finally died, rip, and I bought another keychain camera (dont know which one) last year but the battery died very quickly.
So made it into a hat cam with external battery.
Just opened up the case, unsoldered the original battery leads, soldered in it's place a female JST plug , hotglued the wires to the circuit board so they won't pull out, and away we go.
I like the external battery because I can user bigger mAh lipo for long life between charges.
The battery is under the cap held in the liner by the spring clip.
Bolted and zip-tied camera to the hat.
I had to get rid of my MGB but kept the hat. Both have seen better days.
Posted by FeiJi | Jan 03, 2015 @ 12:26 AM | 4,053 Views
Wow, still tail heavy but I can tell it's got great glide. Add a little more nose weight, and clean up the end of the wings (one still has some extra length of tube spar sticking out) - guess I should be surprised it flew at all. Now 700 grams so will probably end up at 750 but that will handle wind well and it still will glide great
(Optimist.)
Update: 1/11/2015 - another 50 grams did the trick - it flies beautifully now. Just have to get my camerawoman back. Love flying finless.
There is so little sweep that it is basically just a flying plank. CG has to be spot on. I knew that.


BoneYard 6 EPP Flying Wing Maiden (0 min 34 sec)

Posted by FeiJi | Nov 17, 2014 @ 08:38 PM | 4,457 Views
AUW 615 grams. About 400 sq inches area. 1800 kv motor, 40amp ESC, 2200 3s lipo, Radio is inside wing. Just don't have camera anymore for maiden so will have to get someone to video or attach my camera to my tx somehow.

First flight didn't go well as too tail heavy. Same story with first one I built as it has low sweep and needs forward cg - almost as much as staightwing tailless plane.
I will add couple ounces and it should be fine. This size wing carries more weight easily and doesnt effect flight time much. I expect to hit 20 minute flights with this battery as my last wing of this configuration hit 18 minutes on an 1800mah lipo..
The truth is in the testing I guess.
Posted by FeiJi | Nov 12, 2014 @ 06:06 PM | 6,490 Views
Finished the airframe and ready to add controls and electronic stuff. Weighs 260 grams without any equipment. About 400 sq inches and should be final AUW of 600 grams. This is my BoneYard 6 wing. This will be finless like my other wings.
Posted by FeiJi | Nov 09, 2014 @ 04:57 AM | 4,882 Views
I gave away my last 40" wing when I moved and enjoyed flying it so much I had to build another. Reinforced this one with carbon fishing pole sections - so strong I can't bend the wing and I haven't even laminated it yet. With the big tubes (which add very little weight) and little flex, this feels more like a real airplane wing. This one should last a few years.