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Author Topic: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce  (Read 1056 times)
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LASTWOODSMAN
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REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #25 on: January 04, 2019, 08:57:14 PM »

BLUEBIRD Ornithopter 16" wingspan,  one quarter ounce   Birdkit.com

Thanks vtdiy  Smiley
     At 3:00 PM there was not a cloud in the sky (finally), solid sun, Temp was  48 deg F (feels like 43), the wind was blowing 11 mph from the South West , gusting to 16 mph , humidity  53%.   I grabbed the dog and the 16" Bluebird ornithopter, and we headed out to our little flying field - the Cricket Wicket grounds in Jackson Park, Windsor, Ontario.  I took some nice outdoor pics on the walk out. 
     I started out with two flights of thirty winds straight down wind.  They worked really good, about three sort of medium tight circles, about 7 seconds.  Then I wound the motor in the other direction, and it still flew just fine - maybe a little better - so I stuck with this and made about 15 flights, making circles as it blows downwind.   

pics 1 to 6  of  12 pics        best pic is #5                 (cont on next Reply)

LASTWOODSMAN
Richard
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Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
LASTWOODSMAN
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REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #26 on: January 04, 2019, 09:03:41 PM »

BLUEBIRD Ornithopter 16" wingspan,  one quarter ounce   Birdkit.com
(cont from last Reply)

     I did mostly 50 winds, but I did try a 60 and a 70 wind flight.  The farthest distance it flew was 45 yards and the longest time was about 16 seconds.  Every landing was super soft, as it just glides so perfectly, like a pigeon with its wings held up in a  "V"  shape, and always seems to have turned into the wind for the landing.   The crank wire can really auger into the base of the grass stems on landing, if there is the slightest number of turns left on the motor - I mean stuck - you can't just pull it out!
     Actually launching this bird was pretty hairy !!    Initial power burst sends it up in fast medium tight circles right over your head,  after which they widen out, circling and drifting with the wind downwind.   Nathan Chronister pretty much guaranteed that they fly, and he was right.
      After those 15 flights and 19  pics later, I decided not to get too greedy and wreck it the first day.   It was nice to see it flapping and gliding around.   This is a really good starter kit.

pics 7 to 12  of 12 pics             best pic is pic #9 (third one)

LASTWOODSMAN
Richard
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Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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« Reply #27 on: January 05, 2019, 12:10:01 AM »

Sounds like you had a lot of fun Richard. I think I would be thinking about a stooge to wind your motor off the model. All you need basically are 2 hooks on a base , spaced around the length of your motor stick. You will need small O rings or similar on the rubber motor and when the motor is fully wound you transfer the rubber from the winder to the rear hook on the model while holding it stationary at the front. Then remove the front of the motor from the hook on the base and carefully place it on the front hook. Just take your time and it will work ok. This is basically how I wound my EZE B many years ago. The hook on the base was the front of a torque meter.

John
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LASTWOODSMAN
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REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #28 on: January 05, 2019, 01:02:16 PM »

Hi John.  After winding, as soon as you let go of that front crank wire, immediately,  the wings beat and the strut assembly wobbles wildly, causing the wings to beat down on your fingers that are holding the strut assembly ...  it is best just to let it all go at once, I think ...

BLUEBIRD Ornithopter 16" wingspan,  one quarter ounce   Birdkit.com

     Well, we went flying again today at 11:45 AM -  Temp was 39 deg F (feels like 39),  81 % humidity, and  the web said 7 mph gusting to 11 mph,  but it turned out to be more than that, and the Detroit radio station said it was getting "breezy" ...
      I got in about 10 flights.   The rubber was weak, and I did not get too much figured out with a Gurney Strip I glued on, as it was getting more windy.   BUT,  I did get a few more good pics - the BLUEBIRD Ornithopter is now safe at home ...

six pics  1243  1247  1248  1250  1251  1253


LASTWOODSMAN
Richard
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Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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« Reply #29 on: January 07, 2019, 06:51:30 AM »

Good job Richard! Looks great in the air! Keep working with it for longer flights, Thanks for sharing,

Robert
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LASTWOODSMAN
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REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #30 on: April 08, 2019, 11:38:15 PM »

BLUEBIRD Ornithopter 16" wingspan,  one quarter ounce   Birdkit.com

FLIGHT REPORT            MONDAY APRIL 8 2019

     It has been a long time since this ornithopter flew on Jan 5 2019.  I had just again flown it last night for several flights, but it was circling to the left too tight, and staying too close to me  - only 6 sec max flights - alas, I had no clay weight with  me.  Tongue
     Today 72 deg F and little wind, so we went back in the heat of the afternoon past the Spit and Hurri to the Cricket Field of Jackson Park, with some clay to try to trim out the flight of the circle wider - it flew fine on Jan 5,  but not now ...  I tried many different places for little bits of clay, at the wing tips and tail tips, of various combinations, to no real success at all.   Sad   LOL   Here are some different views of it in the air.

Pic #1     1887
Pic #2     1888
Pic #3     1891
Pic #4     1894
Pic #5     1897

LASTWOODSMAN
Richard
cont.
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Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Logged

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
LASTWOODSMAN
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Topic starter
REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #31 on: April 08, 2019, 11:43:36 PM »

BLUEBIRD Ornithopter 16" wingspan,  one quarter ounce   Birdkit.com

FLIGHT REPORT      MONDAY APRIL 8 2019
 cont. from previous Reply  

      It is still flying circles too tight for some reason, and not drifting downwind for long oval circles, and I only got a couple of 10 sec flights on 30 to 50 winds.   More thinking - maybe a  3/32" rubber motor to slow down the flapping - it actually was really flapping faster on one of the flights only, with the flapping so rapid,  it was almost twice the frequency it seemed  ??   mind boggling ...   Huh Huh  -    I will tie a couple of motors up for next time.   Anyways,  here are some nice pics on the first hot day this season.   The close circles were good for close pics, though.   Grin

Pic #6     1898
Pic #7     1900
Pic #8     1902
Pic #9     1904
Pic #10     1905   BEST PIC

LASTWOODSMAN
Richard
Attached files Thumbnail(s):
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Re: BLUEBIRD Ornithopter by birdkit.com 16 inch wingspan 1/4 ounce
Logged

OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
OZPAF
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« Reply #32 on: April 09, 2019, 09:41:01 PM »

The tail has not developed some "Tail tilt" by any chance? The tail would have a strong effect.
John
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LASTWOODSMAN
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« Reply #33 on: April 10, 2019, 12:16:56 AM »

     Hi John.  I have now looked at it from every angle, and every position of those flapping wings, and I cannot readily see any warps. 
       I do however, have a theory.  Huh   As it accelerates and climbs on launch and starts to bank left, it seems to be approaching an angle of attack too steep, as demonstrated by a lower speed, stall warning, as it enters the turn with a more pronounced upward angle of attack.  All because I installed a larger, newer, more fuel efficient motor (a copy of a competitor),  Tongue   mounted a little more forward and a little higher, because it did not quite end up fitting this model.   This really affected the CofG .    Sad    Unbeknownst to me, my MCAS kicked in (I never knew I had MCAS),  Huh Undecided    and directed my stab trim tab (I never knew I had one of these either), for a down attitude angle of attack to compensate for the up attitude of the new motor.   I did not know this either -  an r/c guy was flying next door on the same frequency of my MCAS, and his transmissions interfered - purposely or not - with my MCAS, and kept causing the ornithopter to keep nosing down in these fast descending tight spirals, into the ground ...

LASTWOODSMAN
Richard
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
LASTWOODSMAN
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REAL PLANES HAD ROUND ENGINES AND TWO WINGS



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« Reply #34 on: April 10, 2019, 04:58:37 PM »

     Sorry, ...  I forgot to say what the acronym MCAS stands for -  Maneuvering Characteristics Augmentation System.   
https://phys.org/news/2019-03-ethiopian-airlines-mcas-boeing-max.html

LASTWOODSMAN
Richard
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
OZPAF
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« Reply #35 on: April 10, 2019, 09:10:39 PM »

 Cheesy That sounds perfectly viable Richard. The  trim tab is hidden and it moves around on the tail as the covering distorts

John
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