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Jan 04, 2012, 04:29 PM
Country studio

It has turned


Although it seems to make the rudder reverse in flapping ailerons, since Wing Dihedral will become large if wings are raised, it has turn in the direction which considered.
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Jan 04, 2012, 04:47 PM
Registered User
G-LO's Avatar
OK. I see.
Jan 08, 2012, 07:16 PM
Registered User
therealthing691's Avatar
just a couple of pictures of my bob hoey build im not building exactly to plan but slowly getting there.I havent build a model of balsa in about 20yrs well holidays are over, back to work this evening i owe i owe its off to work i go 4pm to 1am cheers brian
Jan 09, 2012, 01:34 AM
Country studio

flight of a flapping eileron airplane


The bird type airplane by flapping eileron was flown today.
I did video photography with the helmet camera.
Flapping Eileron in omiya tanbo (1 min 1 sec)
Jan 09, 2012, 04:09 AM
DIY Mania from Taiwan
Quote:
Originally Posted by kanai
The bird type airplane by flapping eileron was flown today.
I did video photography with the helmet camera.
http://www.youtube.com/watch?v=Ri2a-vDYDnI
Kanai-san:
Yes,it turned when wingtip aileron flipped
Nice vid,thanks for sharing
Cheers
Sam
Jan 09, 2012, 09:05 AM
Registered User
Quote:
Originally Posted by kanai
The bird type airplane by flapping eileron was flown today.
I did video photography with the helmet camera.
http://www.youtube.com/watch?v=Ri2a-vDYDnI
Mr. Kanai, sorry about that but IMO your previous turning methods work better. Probably G-LO's suggestion about simultaneously- differentially moving of the control surfaces will help and also will reverse the turning direction.

Best wishes!

Otto
Jan 13, 2012, 01:36 AM
DIY Mania from Taiwan
Gents:
completed my scaled hawk yesterday and maiden the bird this AM...
unforunately the bird crashed
this is the first time I have ever crashed my flying pets on the maiden flights
root cause.....the size of ailerons I'm convinced......needed further modification
Cheers
Sam
PICT0973
PICT0984 (0 min 53 sec)
Jan 13, 2012, 03:58 AM
Registered User
therealthing691's Avatar
sorry to hear about the crash hope your hawk is ok regards Brian
Jan 14, 2012, 02:45 AM
Registered User
Larry Jolly's Avatar
Sam,
I have been watching your bird models with interest. Studying your video of your Hawk design, it appears to be unstable in pitch axis from the moment you launch it. You have far more experience than I with your designs, but perhaps the horizontal area is marginal for the wing area, and or the center of gravity has exceeded the aft postion for your static margin. My comments are suggested by the oscillations in pitch, which appears to end in a stall. The ailerons seem to correct fine and the model appears stable in roll.
Good luck I hope it is not damaged badly. Larry
Jan 14, 2012, 05:32 AM
DIY Mania from Taiwan
Quote:
Originally Posted by therealthing691
sorry to hear about the crash hope your hawk is ok regards Brian
Brian:
Thanks for the kindness
the bird happened to crashed on bush,no damage observed
will do another maiden soonest.
Best Regards
Sam
Jan 14, 2012, 05:37 AM
DIY Mania from Taiwan
Quote:
Originally Posted by Larry Jolly
Sam,
I have been watching your bird models with interest. Studying your video of your Hawk design, it appears to be unstable in pitch axis from the moment you launch it. You have far more experience than I with your designs, but perhaps the horizontal area is marginal for the wing area, and or the center of gravity has exceeded the aft postion for your static margin. My comments are suggested by the oscillations in pitch, which appears to end in a stall. The ailerons seem to correct fine and the model appears stable in roll.
Good luck I hope it is not damaged badly. Larry
Larry:
very good comment,also a good learning,thanks
have both re-do the CG & pitch axis,and modified the ailerons
will post another maiden flight when the weather's OK
Best regards
Sam
Last edited by samwei1950; Jan 14, 2012 at 09:15 AM.
Jan 14, 2012, 07:28 PM
Registered User
therealthing691's Avatar
im glad no hawks where hurts in your maiden sam cheers brian
Jan 18, 2012, 06:11 AM
DIY Mania from Taiwan
Second miaden flight in the nice afternoon sunshine here in Taiwan,the bird is now as good as a little baby
thanks Larry,you're right
Cheers
Sam
PICT0995 (1 min 37 sec)

PICT0988
Jan 18, 2012, 08:39 PM
Registered User
therealthing691's Avatar
very good sam congrats regards brian
Jan 18, 2012, 08:42 PM
Registered User
G-LO's Avatar
Very, very nice flight. I wanted to see another pass. I love the silhouette ....


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