New interesting ornithopters and ornithopters related stuff - RC Groups
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Jul 25, 2016, 09:31 PM
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New interesting ornithopters and ornithopters related stuff


If anybody know something more or the creator please share some info!
Eric Dainty RC Ornithopter (1 min 37 sec)
Last edited by ZTEX; Apr 17, 2017 at 10:36 AM.
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Jul 26, 2016, 10:09 AM
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Quote:
Originally Posted by ZTEX
If anybody know something more or the creator please share some info!
https://youtu.be/QGaBT0t3fkU
Seems this is the same guy from next video, also the designer signature is the same
Link to the thread: https://www.rcgroups.com/forums/show....php?t=2098474
66" RC Ornithopter (0 min 28 sec)
Jul 26, 2016, 10:32 AM
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Powered by two separate servos reworked for continious rotation and with brush motors. The servos are sinchronized by the black plastic gears wich are used as a cranks as well. The black plastic gears aren't involved in motor RPMs reduction .there can be seen downstroke assisting springs as well.I'm not sure but beleave that there is electromechanical switch for glide position sensing.The way in which wings are locked in glide position is invisible so can't comment it sorry.
Love the way Eric launched it , that is the same way Horst Rabiger done that earlier before with locked in glide position wings .Note how the flapping action begins with downstroke.
The wings design is a mystery but seems as conventional technique for balsa wood models is used and covered by thermo stretching film. Note how low is the wing twist in action.
The tail is clear for everybody I beleave .
That's it all my speculations
Good job Eric !
Bravo
Last edited by ZTEX; Jul 26, 2016 at 10:37 AM.
Jul 26, 2016, 10:55 AM
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Very cool!

I would love to know the weight and span. It's amazing that servo gearboxes could last even that long flapping such large wings, I get the feeling that this model is rather lightweight. I'm guessing < 3lbs and a wingspan > 10 ft?

Steve
Jul 26, 2016, 11:14 AM
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Quote:
Originally Posted by mlbco
Very cool!

I would love to know the weight and span. It's amazing that servo gearboxes could last even that long flapping such large wings, I get the feeling that this model is rather lightweight. I'm guessing < 3lbs and a wingspan > 10 ft?

Steve
You are probably right on the weight Steve or it's even lighter and espetially if my speculation about who's the guy are correct.He build very light ornithopters. Unfortunately as we can reed in the previous thred , he isn't in love with computers so let's hope that his friend Dmitro Silin Singsoftkitty will pop up and will tell us something more
Jul 26, 2016, 02:41 PM
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Velko Velkov's Avatar
Quote:
Originally Posted by ZTEX
If anybody know something more or the creator please share some info!
https://youtu.be/QGaBT0t3fkU
Is this passive articulated wing !

0 : 45
Jul 26, 2016, 02:56 PM
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Quote:
Originally Posted by Velko Velkov
Is this passive articulated wing !

0 : 45
No Velkov , at least it isn't done purposely I beleave,just the aspect ratio is very high and the wing bends up/down under load a litle bit.
Jul 26, 2016, 03:06 PM
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Velko Velkov's Avatar
Quote:
Originally Posted by ZTEX
No Velkov , at least it isn't done purposely I beleave,just the aspect ratio is very high and the wing bends up/down under load a litle bit.
The wing is with 2 parts !? 0:57

Eric Dainty RC Ornithopter (1 min 37 sec)
Jul 26, 2016, 04:07 PM
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Velko Velkov's Avatar
Quote:
Originally Posted by ZTEX
Seems this is the same guy from next video, also the designer signature is the same
Link to the thread: https://www.rcgroups.com/forums/show....php?t=2098474
https://youtu.be/TuOw6BUOo78
This wing is passive articulated.
Jul 26, 2016, 11:12 PM
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Quote:
Originally Posted by Velko Velkov
This wing is passive articulated.
I don't think so Velkov but wouldn't argue with you.
Jul 27, 2016, 01:04 AM
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Velko Velkov's Avatar
Quote:
Originally Posted by ZTEX
I don't think so Velkov but wouldn't argue with you.
The photo
Last edited by Velko Velkov; Jul 27, 2016 at 01:13 AM.
Jul 27, 2016, 01:10 AM
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Velko Velkov's Avatar
See the comments

66" and 16" Ornithopter flying together (0 min 26 sec)
Jul 27, 2016, 01:29 AM
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Quote:
Originally Posted by Velko Velkov
The photo
Velkov, those pictures are from the previous one ( second video in this thread)
And yes those are passively articulated wings.
The new one (first video in this thread and the subject of present discussion ) is not with articulated wings . You are right about that the wing consist of two separate parts which can be seen clearly on 0.24 min in the first video . Seems the inner mainly lift produsing part is profiled (double surfaced) when outher part( mainly thrust producing part) is one surface wing but
I still not convinced that this was designed as passively articulated wing.
Jul 27, 2016, 01:34 AM
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Other interesting thing with this ornithopter is that the flapping mechanism is placed over the wings wich is unusual and will place the CG higher which isn't good for stability but this solution protect very well the mechanism on landings.
Aug 20, 2016, 08:29 AM
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20 km at 100km/h pigeon

Vroege Vogels - Duif vliegt over snelweg (3 min 59 sec)


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