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Old Feb 18, 2008, 12:15 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
Yaw rate gyro

Added a rate gyro in yaw. It should dampen out the yaw excursions so It flies more steadily in heading, maybe roll too. Hopefully that makes it easier for the plane to hold heading. That'll reduce pilot workload for long transits and improve efficiency by reducing "weaving" along track. Maybe it'll steady out the compass as well.

Just waiting for good weather. Will report back when I get a flight in.
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Old Feb 18, 2008, 05:55 AM
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CrashingDutchman's Avatar
The Netherlands, Utrecht, Amersfoort
Joined Oct 2004
2,192 Posts
I loved this video very much!

It would have been even nicer if you could move the camera.
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Old Feb 18, 2008, 07:03 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
Quote:
Originally Posted by CrashingDutchman
I loved this video very much!

It would have been even nicer if you could move the camera.
Thanks.

Yes, it would have been better. I accidentally severed the pan servo wire as I was putting the plane together before the flight. It's fixed now. Hopefully the next video will be of a fully functional plane.
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Old Feb 20, 2008, 12:05 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
Warning-Ensure that the notch on the leading edge, inside the fuse, is cut perfectly

One of the chief complaints about the Big Wing Easystar is that it was very slow to turn primarily becuase the reduced moment arm of Easystar's tail exerts less influence over the wing compared to the EasygLider. To fix this as planned, I enlarged the tail and nearly tripled the existing rudder.

I had a short but interesting flight yesterday, when testing this new mod. Soon after launch, I noticed that it had good authority turning right, as expected. When I tried to turn left, it displayed a very mushy feel. I found the stop nearly everytime I tried to turn left. With controls neutral, it wanted to turn right slowly. This was the first flight I observed such a large disparity in rudder authority. Normally I had adequate, but mushy authority, in BOTH directions.

I decided to bring her back after about a minute of flight. Because I was flying with a left to right cross wind, her tendency to turn right was exagerated on apprach. After the third attempt, I added nearly full power. This gave me enough speed which resulted in enough authority rudder authority to the left, allowing me to safely get her over the LZ. As I slowed down for landing, the plane started to turn left again, fortunately "landing", into some shrubs without any damage.

Here's what I learned:
1. Ensure that the notch on the leading and trailing edges, inside the fuse, are cut perfectly to size. This will ensure that the wing aligns with the fuse perfectly. I cut them slightly larger. I relied on "eye balling" the wing root lines to align the wing with the fuse. During this flight, I hastily assembled the plane and did not check alignment. I think that when I launched, the wing as misaligned left wing forward of center causing the tail to give a constant right turn input, which I had to counteract during the entire flight with the rudder...

I will continue testing the new tail when weather permits.
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Last edited by scrtsqrl; Feb 21, 2008 at 04:26 AM.
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Old Feb 21, 2008, 07:16 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
Here are some pictures of the enlarged tail.

It doesn't look too awkward...so it should work, right?

Still waiting on good weather...
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Last edited by scrtsqrl; Feb 21, 2008 at 07:23 AM.
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Old Feb 21, 2008, 12:30 PM
Fly FPV, sleep; repeat
twinturbostang's Avatar
Germantown, MD
Joined Mar 2006
3,376 Posts
Quote:
Originally Posted by scrtsqrl
It doesn't look too awkward...so it should work, right?
LAR rule applies here. (Looks About Right)
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Old Feb 22, 2008, 10:24 PM
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Jack Crossfire's Avatar
Calif*
Joined Sep 2006
2,084 Posts
So what is the flight time up to now?
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Old Feb 22, 2008, 10:33 PM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
The longest flight so far is 1 hour 28 minutes. I had to quit because it started pouring. No sign of running out of "juice".
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Old Feb 22, 2008, 10:47 PM
Husband, Dad, Skydiver, RC'r
Bill K.'s Avatar
United States, NC, Waynesville
Joined May 2002
5,559 Posts
Quote:
Originally Posted by scrtsqrl
The longest flight so far is 1 hour 28 minutes. I had to quit because it started pouring. No sign of running out of "juice".
What is your battery and motor setup? Are you running the whole time or doing a lot of gliding and only using the motor when needed?
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Old Feb 23, 2008, 12:40 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
ARC 28-37-3 & 30 Amp ESC from www.lightflightrc.com
6X6 APC prop.
2 X 2300 2s 8C LiPo from www.microwireless.net

I get to altitude, figure out the minimum power to hold altitude, and simply cruise around at that power setting, adjusting only to keep altitude.
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Last edited by scrtsqrl; Feb 25, 2008 at 09:50 AM.
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Old Feb 23, 2008, 11:07 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
Motor Mod Video...

Easystar Brushless Motor Mod (2 min 15 sec)
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Old Feb 24, 2008, 12:17 AM
Just trying to get a nut.
scrtsqrl's Avatar
United States, VA, McLean
Joined Oct 2006
6,343 Posts
JoeKnight's Big Wing Easystar

Here's 3p video of JoeKnight's Big Wing Easysatar. The video gives you an idea of how it looks and handles...He's had the same experience as I have...Smooth, slow, nice.

Thanks Joe.
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Old Feb 24, 2008, 12:36 AM
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JMSTECH's Avatar
Canada, BC, Duncan
Joined Dec 2006
3,618 Posts
Quote:
Originally Posted by scrtsqrl
Very cool and useful mod JBB!!! God I love that patch!!
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Old Feb 24, 2008, 07:11 AM
dmt
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dmt's Avatar
near Gangneung, Korea
Joined Jul 2004
688 Posts
ScrtSqrl -- great thread. I may do this too some day, to make a Truly Easy Glider (as I already have two Easy Gliders and an Easy Star).
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Old Feb 24, 2008, 03:38 PM
Free Flying
anci3nt's Avatar
Joined Nov 2006
525 Posts
Are you using a 20c lipo?
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