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Home✈️Aircraft🚁HelicopterAutogyros - Gyrocopters › LA 500 autogyro successfully flying!
06-03-2011 08:10 PM  9 years ago
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mikeflyz

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Westlake Village, CA

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LA 500 autogyro successfully flying!
Just a quick note that my LA 500 finished its first flight followed by 5 more flights; some full stop and some touch and goes. I will have more follow up later, but it is completely stock with the head angles, CG and rudder set up as directed.

I did the takeoff roll with some ip elevator to maintain rotor rpm. Once the nosegear got light, I continued feeding in power, releasing some back pressure until it lifted off. (pretty much the same procedure I used with my full-size gyro years ago)

It climbs nice and steep at a slow airspeed, but it is difficult to tell roll orientation when turning back toward you. I got some good altitude to allow for mistakes.

This is not my first model autogyro, a tractor style is easier to start with.

After a couple of landings, I could get the groundspeed down to nearly zero with a light headwind.

It does work...
Mike
MA Fury Extreme, JetCopter SX
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06-14-2011 11:22 PM  8 years ago
mikeflyz

rrApprentice

Westlake Village, CA

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Update on LA500 gyro
Here's some video of the LA500 flying

Watch at YouTube

Here's what I have found so far...

Well, I doinked it twice, mainly from losing orientation. With so few airframe references, it is easy to do. I have to use a combination of rotor disk, main gear and tail, particularly in roll. It does like to roll knife-edge, so some opposite aileron is required in the turns. The tailfeathers break easily, but are just as easily fixed with 5 minute epoxy. Standard crash stuff are the blades, keel landing gear leg and mast. If you have plastic servo gears, they'll be wiped out too. It's easy to fix, but keep the plastic fairings, seats, pilot etc off of it until you get the hang of it.

It will turn on aileron alone, but it is much quicker with coordinated use of rudder. The slower it gets, more rudder and less aileron is required. One crummy thing about the rudder is the lack of right rudder available; the control rod bows under load and receives very little rudder in that direction. I haven't worked out a solid solution yet.

The published head angles are good, but the pushrod lengths to achieve those angles with the HS225 servos are too long. I will be making some new pushrods soon to make the servos centered properly in trimmed flight. Another reason for going to new pushrods is the brass balls on the servos are too tight on the links and the links themselves are VERY brittle. The ball size is a weird one too, so I am planning on using Align balls and links on the next set. That means cutting off the ball on the upper end, and drilling and tapping a small hole to mount the ball.

This is also my first experience with A123 batteries and they're just about perfect for this application. I just have to modify the settings on the ESC to keep it from going into soft cutoff at the 3S LiPo setting.

Now that I got it flying decently, it's time to paint and install the seat, instrument panel and pilot
Mike
MA Fury Extreme, JetCopter SX
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06-17-2011 04:28 AM  8 years ago
jodini

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Omaha, NE

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Congrats Mike! Looks like it flies great!
Joe
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