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Posted by Knoll53 | Sep 22, 2015 @ 11:28 PM | 10,797 Views
new camera mount

Bird of Time at beach - cloudy - 120 degree lens (7 min 6 sec)

Posted by Knoll53 | Sep 19, 2015 @ 10:59 PM | 9,371 Views
During the dives, there is what sounds like a stall indicator buzzer going off. Not sure what it is really. Maybe the covering on the temporary hatch.

Bird of Time 40 minute thermal (12 min 35 sec)

Posted by Knoll53 | Sep 18, 2015 @ 06:36 PM | 10,130 Views
slope soaring in Virginia Beach?
Posted by Knoll53 | Sep 18, 2015 @ 04:02 PM | 9,953 Views
Bird of Time pulls high start stake out of sand and almost hits wing.

Bird of Time - high start stake puller (0 min 32 sec)

Posted by Knoll53 | Sep 18, 2015 @ 03:53 PM | 9,352 Views
with a little help of the avian community

Bird of Time - with birds (3 min 13 sec)

Posted by Knoll53 | Sep 13, 2015 @ 07:23 PM | 9,075 Views
I've almost forgotten how easy and slow flying can be.
Bird of Time T-tail Slope Soaring (3 min 54 sec)

Posted by Knoll53 | Jun 13, 2015 @ 01:58 PM | 8,904 Views
Here is the current 48" wingspan x 60" long version.
Single fin
Higher aspect ratio wing with a wing strake
Posted by Knoll53 | Jun 06, 2015 @ 06:25 PM | 8,559 Views
a more floaty version

Jet

Posted by Knoll53 | May 11, 2015 @ 01:17 PM | 10,736 Views
At 20 oz. AUW this little plane will have a 13oz./s.f. wing loading. With a 16" chord, this should be flyable most days of the year. my guess is that it will fly in a 12mph wind at the beach.

jet - core cut (1 min 28 sec)

Posted by Knoll53 | Oct 28, 2014 @ 04:06 PM | 7,290 Views
This is an evolution of the SW-2. Same airfoils but with a different plan form and flap layout. This layout should be more versatile with flaps that are only slightly pitch positive.
Posted by Knoll53 | Oct 11, 2014 @ 05:48 PM | 6,708 Views
Spent a few hours trying to be a hero and fly with a high performance aft CG, then moved the CG forward to find a better handling plane. Elevator throws reduced to minimum. Nice little hyper stall with flaps and full nose up.

SW 7 ... Forward CG (1 min 25 sec)

Posted by Knoll53 | Oct 10, 2014 @ 12:48 AM | 6,567 Views
Pulling back with full flaps is not such a smooth ride.

SW 7 tapered flaps testing (0 min 45 sec)

Posted by Knoll53 | Oct 06, 2014 @ 12:20 PM | 6,205 Views
With the potential of lots of highly cambered wing, this one could be a floater, even at 10oz. /s.f.
Posted by Knoll53 | Oct 05, 2014 @ 06:43 PM | 6,331 Views
Flaps are working great now.
So rekit #7 has stretched out the flaps to be full length which requires a bit of nose down mixing with the elevons. There was just a little too much nose down for these flights, which is the safe way to go. This configuration works great. It can fly slow now with flaps and can pull a high angle of attack for final landing flare. As originally hoped for, the flaps provide higher lift at a slower speed.....
SW-7.......... full length flaps (1 min 18 sec)

Posted by Knoll53 | Sep 24, 2014 @ 11:04 AM | 5,379 Views
I'm finding some advantages to full length flaps which are pitch positive.
Posted by Knoll53 | Sep 13, 2014 @ 07:22 PM | 5,056 Views
Final round of flap testing after they were lengthen towards the root by over and inch. Pitch response is a problem with flaps. Even modest nose up input causes a stall. If flies OK without flaps.

Razor's Edge - Flap test after body work (3 min 57 sec)

Posted by Knoll53 | Sep 07, 2014 @ 07:03 PM | 5,128 Views
3rd sighting in 6 weeks of a pack of 3 California Condors. Most video lost to auto focus. One of them dropped out and landed while the other 2 disappeared into the distance for 20 minutes, then they returned and soared around the perched one. I left after 1/2 hour and the perched one was hanging tough.

California Condors at Garrapata State Park (2 min 30 sec)

Posted by Knoll53 | Sep 01, 2014 @ 07:22 PM | 4,626 Views
Flying in calm conditions finally settled on 5% static margin for the most aft safe CG. At nearly 12 oz/s.f. and a 4" airfoil, that's about as daring as I get. The flaps proved to induce a little nose down in the calm conditions, which made it difficult to fly with a high AoA for final flare. This plane needs to move even with flaps. I'll add an inch to the flaps before final finishing. Nickels formula was not that far off.

Soberanes, no wind. no thermal, so lots of testing (6 min 13 sec)

Posted by Knoll53 | Aug 31, 2014 @ 09:44 AM | 4,677 Views
Final layout with field tested "nearly" pitch neutral flaps.