SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jul 21, 2012, 11:19 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,960 Posts
Very nice carving job,especially the head and the feet
am a bird glider lover too,did a lot of carving last year
regards
Sam
PICT0260
PICT0296 (3 min 1 sec)
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 21, 2012, 07:12 PM
Mongo like wind. Wind Good.
V1VrV2's Avatar
Joined Apr 2004
422 Posts
Here's some pix of the tip feathers.

V1VrV2 is online now Find More Posts by V1VrV2
RCG Plus Member
Latest blog entry: Superhawk Last time offer!
Reply With Quote
Old Jul 21, 2012, 07:21 PM
Mongo like wind. Wind Good.
V1VrV2's Avatar
Joined Apr 2004
422 Posts
Eagles fly very fast whan they want to. Having the ability to change aspect ratio in flight...PRICELESS!

Here's a video of a Bald Eagle soaring and I noticed later after watching it that the Eagle twists it's wingtips to turn as well as it's tail. Twisting its wingtips would be akin to humans twisting their wrist. A simple movement and very effective for turns.

Enjoy!




Bald Eagle Soaring Fidalgo Island, WA, USA. (2 min 30 sec)
V1VrV2 is online now Find More Posts by V1VrV2
RCG Plus Member
Latest blog entry: Superhawk Last time offer!
Reply With Quote
Old Jul 21, 2012, 11:01 PM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,960 Posts
Quote:
Originally Posted by V1VrV2 View Post
There will be no vertical fin if things work OK.

Here's a Youtube post of the Japanese Birds being tinkered with. This guy has built countless birds and control systems. All without vertical fins.

http://www.youtube.com/watch?v=wfnM8...eature=g-all-c

Kanai-san have been dedicated to the vertical finless gliding birds for 10 years,found one his latest version plans from Japaness magzine.
the Kanai's gull glider,same as his birds' family,used seperated alirons to control the yaw which is quite interesting vs Bob's twisting wingtips.
the spec. of Kanai's gull glider:
wingspan...1520mm
lenth...620mm
RTF weight...240grams
RC channels:tail X1 servo
wing X 2 servos(seperated ailerons)
control range of the seperated ailerons: outer aileron...-45 to +5 degree
inner aileron...+25 to -5 degree
cheers
Sam
PICT1159
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Old Jul 21, 2012, 11:59 PM
Registered User
G-LO's Avatar
Va.Beach VA.
Joined Aug 2007
2,128 Posts
If someone were to manufacture and sale your bald eagle in epp or in good quality epo, I think they would definitely find a lucrative market in the rc field. So far, only flyparty is producing the only epp eagle right now....so far.
G-LO is offline Find More Posts by G-LO
Reply With Quote
Old Jul 22, 2012, 10:00 AM
Mongo like wind. Wind Good.
V1VrV2's Avatar
Joined Apr 2004
422 Posts
Quote:
Originally Posted by samwei1950 View Post
Kanai-san have been dedicated to the vertical finless gliding birds for 10 years,found one his latest version plans from Japaness magzine.
the Kanai's gull glider,same as his birds' family,used seperated alirons to control the yaw which is quite interesting vs Bob's twisting wingtips.
the spec. of Kanai's gull glider:
wingspan...1520mm
lenth...620mm
RTF weight...240grams
RC channels:tail X1 servo
wing X 2 servos(seperated ailerons)
control range of the seperated ailerons: outer aileron...-45 to +5 degree
inner aileron...+25 to -5 degree
cheers
Sam
PICT1159
That is the first control scheme I was going to try with the Eagle. Trying to fly it with no vertical tail I am very concerned with adverse yaw. Low speed controllability could get interesting That's why conventional ailerons probably won't work too well. The split aileron/drag flap will alleviate the adverse yaw but is not very efficient as everytime the controls move, they create lots of drag and loss of lift. Bob Hoey's tip feather arrangement is more efficient but in order for them to work he needs alot of negative incidence on the tip feathers. He's not gaining any lift from the tip feathers like a real bird but on the other hand it works for turning the model. Ideally whats needed is the ability to twist the outer wing panels like ailerons. That's where the "easy part" ends. Mechanically accomplishing this would put more weight at the wingtips and cause Dutch Roll problems. For now, it's all about compromise so I'll try it with the split flap/ailerons first and go from there.
V1VrV2 is online now Find More Posts by V1VrV2
RCG Plus Member
Latest blog entry: Superhawk Last time offer!
Reply With Quote
Old Jul 22, 2012, 11:20 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,960 Posts
Another split/ailerons model (kite glider version No.8 ) from Kanai-san
spec:
wingspan...1620mm
lenth...........537mm
control........ tail servos X 2
wing 1 servo for split/ailerons
regards
Sam
PICT1166
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Old Jul 22, 2012, 12:19 PM
Registered User
G-LO's Avatar
Va.Beach VA.
Joined Aug 2007
2,128 Posts
Mr. V, this may give you a system overload, but it might be for your own good.

全動鷹機尾翼 (0 min 48 sec)


1 4米無動力黑鳶(Black Kite) (1 min 16 sec)


2010-01-02 朝陽飛場 地面測試無動力像真鷹機1 (0 min 37 sec)


老鷹慢慢飛 (1 min 40 sec)


老鷹慢慢飛 (0 min 10 sec)
G-LO is offline Find More Posts by G-LO
Reply With Quote
Old Jul 23, 2012, 12:22 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,960 Posts
Nice vids,thanks for sharing
another Kanai-san from Taiwan
regards
Sam
DSC04939
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Old Jul 23, 2012, 02:04 AM
Registered User
G-LO's Avatar
Va.Beach VA.
Joined Aug 2007
2,128 Posts
Oh MY God!!!!!!!!! What!!?!? You have one of those? PLEASE PLEASE, I WANT ONEE!

I've been looking for them! Trying to contact that guy on YouTube and you have one Sam!?! Why didn't you say so?

Sam did you make it or did you buy somewhere? They look absolutely amazing! I'm "Valkyry5" on YouTube going crazy with my comments like I'm doing now.. Again, that's amazing!
G-LO is offline Find More Posts by G-LO
Reply With Quote
Old Jul 23, 2012, 05:27 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,960 Posts
Quote:
Originally Posted by G-LO View Post
Oh MY God!!!!!!!!! What!!?!? You have one of those? PLEASE PLEASE, I WANT ONEE!

I've been looking for them! Trying to contact that guy on YouTube and you have one Sam!?! Why didn't you say so?

Sam did you make it or did you buy somewhere? They look absolutely amazing! I'm "Valkyry5" on YouTube going crazy with my comments like I'm doing now.. Again, that's amazing!
Mr.G-LO
I did'nt have any of the birds,just collected the pics for reference
someone made the birds from another city,didn't hear from him for a long time
regards
Sam
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Old Jul 23, 2012, 08:12 AM
Registered User
G-LO's Avatar
Va.Beach VA.
Joined Aug 2007
2,128 Posts
Oh.....
Well I guess my search just went cold. But that picture of the pink hawk looks like the tile from your other pictures..kinda. I think.

Ok. I will be quiet now. Was just a false alarm.

I hope Mr. V making some progress with his eagle. Love to see how the rest of the wings would look.
G-LO is offline Find More Posts by G-LO
Last edited by G-LO; Jul 23, 2012 at 08:20 AM.
Reply With Quote
Old Jul 24, 2012, 03:37 AM
Registered User
Bradford West Yorkshire, UK
Joined Apr 2010
1,642 Posts
There was a Brit kit back in the seventies "Gyr Falcon" and a plan from either RM or RCME.

Regards Ian.
Circlip is online now Find More Posts by Circlip
Reply With Quote
Old Jul 24, 2012, 05:17 AM
Mongo like wind. Wind Good.
V1VrV2's Avatar
Joined Apr 2004
422 Posts
I have a copy of an article on that Gyrfalcon.

Found it in a box of old magazines at a model show. It was molded from white foam and apparently flew nicely.

The designer had originally built prototypes with taped (yes, TAPE!) music wire wing frames.

Thanks for the post!

V1VrV2 is online now Find More Posts by V1VrV2
RCG Plus Member
Last edited by V1VrV2; Aug 08, 2012 at 09:05 PM.
Reply With Quote
Old Jul 25, 2012, 12:18 PM
Registered User
Bradford West Yorkshire, UK
Joined Apr 2010
1,642 Posts
Name of plan just hit me, "Cri-key" alzhimers is not reliable.

Regards Ian.
Circlip is online now Find More Posts by Circlip
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Project "Bald Eagle" P51 Micro mod (1stVideo post 89). cabman1969 Scratchbuilt Indoor and Micro Models 129 Nov 20, 2011 05:32 AM
Bald Eagle grabbed my sloper! JWC Electric Sailplanes 15 Mar 31, 2008 11:09 PM