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Old Apr 22, 2009, 11:14 AM
Norfolk Flyer is offline
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Sooner than I expected!

Weather good, glue dry - so no excuses!

Here's the video, suppose I'll have to paint it now

John

My Foamy (2 min 28 sec)
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Old Apr 22, 2009, 12:21 PM
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Beautiful work, John!

I like the detachable rotor feature.

Thanks for the photos!

Can't wait for the videos. (We were playing musical posts...GREAT video, and great flyer... bet you're very pleased!)

Gary
Last edited by sr71fan; Apr 22, 2009 at 12:30 PM.
Old Apr 22, 2009, 12:41 PM
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John.

I forgot...

Nice landing!



Gary
Old Apr 22, 2009, 12:52 PM
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Thanks for the comments Gary.
If you ever build a model with long rotor blades, I can recommend the 3 - finned tail.

John
Old Apr 22, 2009, 03:25 PM
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You bet I will, John!

Thanks!

Gary
Old Apr 22, 2009, 09:00 PM
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Great work!! Your foamy looked great in the air, and appeared to have a decent flight envelope. Thanks for the video. (Nice hatcam)
Regards,
-Mike
Old Apr 23, 2009, 06:34 PM
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It was a GLITCH! Honestly!
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Quote:
Originally Posted by Norfolk Flyer
Sooner than I expected!

Weather good, glue dry - so no excuses!

Here's the video, suppose I'll have to paint it now

John

http://www.youtube.com/watch?v=NlVpls9pQck


Ha...missed this post!!!

Looks to be a very stable flier John.. cant wait to see it 'in the flesh'

Regards Rich
Old Apr 24, 2009, 04:36 PM
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Two-Blade Success!


I was pleasantly surprised when my very first two-blade rotor lifted off so smoothly yesterday. I thought it was going to be difficult, but proved not to be.

WooHoo!

Gary

Autogyro Single-Rotor Two-blade First Flight (3 min 31 sec)
Old Apr 24, 2009, 05:25 PM
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Gary,

congratulations! Sometimes I have the sneaking feeling that those lightweight rotors use their own kind of physics.

Jochen
Old Apr 24, 2009, 06:08 PM
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Masterful control Gary, you made it look so easy.

I would have dismissed the idea of a 2 blade depron head on a foam model as being a non starter, but you have proved me wrong.

I was also wondering how far it's possible to take the flat depron blade (size wise).

Pusher version on the building board?

Jochen,

As well as the lightness of the blades, I cannot help but think the blade length / chord ratio has something to do with it. Just a feeling as my knowledge of rotor blade aerodynamics is almost non existent.

John
Old Apr 24, 2009, 06:29 PM
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Great flying Gary..do the blades have an aerofoil? or is that profile fuselage helping with the lift.....fascinating to watch!!...well done
Old Apr 25, 2009, 03:30 AM
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John,

there's got to be more to it than that. When I switched the three-bladed Nanomum rotor for an unleaded two-bladed one, I got the same pleasant surprise as Gary: I could easily fly the two-blader with the same set-up as before. And that rotor's blades had a relativly normal aspect ratio of 9. On my other three to two-blade conversions with AB blades I had to increase the rotor back tilt and heavily reduce servo throws to get them to fly.

Jochen
Old Apr 25, 2009, 03:52 AM
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Jochen,
I think that I will just carry on using what works without trying to fathom out why!
I know Gary uses 12 inch by 2 inch by 3mm depron blades on his 3 blade version, with a 2mm CF rod on the LE. I assume he uses the same on the 2 blader (confirm please Gary).
When I built my version of his 3 blader, the blades seemed so fragile on the TE I was tempted to tape CF rod to the TE as well, but it flies fine "as is".

I will try a 2 blade head on mine next, but I'm not nearly as accomplished a pilot and I'm sure Gary's expertise is a big factor.

John
Old Apr 25, 2009, 06:46 AM
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Quote:
Originally Posted by Norfolk Flyer
I think that I will just carry on using what works without trying to fathom out why!
John,

you're right, but the behaviour of those lightweight blades really is a bit unusual.

Jochen
Old Apr 25, 2009, 08:12 AM
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John.

I made an extra 3-blade rotor with blade chord of 1.75 inches. It seems to spin faster, and flies better than the wider blades. I also went with 1.75 on the two-blade rotor (because I already had some strips cut to that width). I'm still amazed at the flight characteristics.

Gary


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