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Old Jul 20, 2015, 05:36 AM
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Quote:
Originally Posted by Lee View Post
I have been playing with feathers on conventional wings trying to see what effect they have on flight.

This is the most recent step to get a bird kit back on our site.

.
Hey Lee. Where are the primary "feathers" located on your site? I have thought about that idea some time back; thinking that your pelicans and Albatross was basically a flyparty Epp Eagle without the feather tips.

With a little tweaking, that design is favoring the look of a Golden Eagle. Very nice *
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Last edited by G-LO; Jul 20, 2015 at 05:45 AM.
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Old Jul 20, 2015, 06:43 AM
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I have been consulting with the same artist that helped with the Peregrine to see what we can come up with. Before we started with a bird and tried to make it a plane. Now we are taking a plane and trying to make it look like a bird so it will fly better. We are going to modify the wing and tail shape and tail and give room for the feathers to be cut into the back of the wing.
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Old Jul 20, 2015, 03:15 PM
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Dayhead and Speedactyl: About membrane wings....

Can I introduce wing warping into the conversation? Here is a 'Carbon Falcon' from Acesim.com It ought to work.
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Old Jul 20, 2015, 04:15 PM
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Originally Posted by nickchud View Post
Dayhead and Speedactyl: About membrane wings....

Can I introduce wing warping into the conversation? Here is a 'Carbon Falcon' from Acesim.com It ought to work.
Thats cool . My wing require a CG as far back as 30% given it has a AOA of 3-5degrees . Like some powerd microlite planes .

Try upthrust the motor that much to enduce that AOA on your wing.

Wing warping is interesting like those early airplanes.
I could incorporate theconcept for future builds
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Last edited by speedactyl; Jul 20, 2015 at 04:23 PM.
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Old Jul 21, 2015, 09:43 PM
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Carbon Falcons are great, just particular within their nature.

My first one flew great but I did a few mods, like alum tube ribs, BL IPS w/ CF rod, a few other whittle thangs and lots of time in set up per specs in da manual n trimmin.
Heck, I use to thermal it to boot.
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Old Jul 21, 2015, 09:55 PM
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hmm I do away with the ribs for simplisity reason and just use airflow to inflate them . problem is if my AOA drops the wing collapse causing a stall. hence the reason I always fly with the nose pointing up. which for some RC pilots this looks unnatural when compare to solid wing aircraft or wings with ribs
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Old Jul 21, 2015, 10:35 PM
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Ahw, but can one fold their plane in a postal tube in a moment, only to later a field to fly again within moments?
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Old Jul 21, 2015, 11:05 PM
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Quote:
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Ahw, but can one fold their plane in a postal tube in a moment, only to later a field to fly again within moments?
That should be the most ideal rc plane for those who commute and travel by bike
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Old Jul 22, 2015, 10:00 AM
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I just checked, they are out of production! ... Carbon falcons, that is...
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Old Jul 22, 2015, 11:30 AM
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Believe me . Its alot complex to produce this type of carbon airframe than to form Foam airframe. This is why foam planes are common. Even wood airframes hardly compete.

my frame is fabricated in aluminum. And just as complex to build.
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Old Jul 22, 2015, 02:49 PM
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When I was a kid back in the mid 60's,I made a escapement controlled simple Jedelsky airfoil wing glider. It flew ok. The Jedelsky airfoil with its flat sheet construction should be able to make a compact foldable wing, kinda like the Carbon Falcon. The first 3rd of the wing would be a sorta strong rigid shaped spar airfoil and the back 2/3rds would be a foldable semi-rigid membrane. This semi-rigid membrane would be a sandwich composite of currently available materials, like the tear proof polyester paper, thin pack foam, kevlar roving and mylar, kinda like how they make racing sails. (btw, I built a 'Geoboat" membrane type canoe using dacron and kevlar roving for the membrane). Anyway, I was kinda thinking along this path with the goal of making a 1/2 scale (14') Pterodactyl and I wanted to simulated the animal's membrane wing which i find fascinating. Its another 'brainteaser' project for now...
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Old Jul 22, 2015, 07:03 PM
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Cool. My last membrane aircraft is loosly base of the pterodactyl and the brits westland hill variant . But with the added tail fin for extra control
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Old Jul 23, 2015, 02:01 AM
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I was also wondering about wing warping as a way to replace the tail fin, somehow providing yaw stability,

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Old Jul 23, 2015, 04:58 AM
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will incorporate that on my next build.. else a I could do a separate surface in a elevon setup attach to the main wing
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