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Old Dec 23, 2012, 04:45 AM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
GosHawk 26iV 2mm EPP wing: Good Flight &Good Gliding

GosHawk 26iV 2mm EPP wing: Good Flight &Good Gliding

GosHawk 26iV 2mm EPP wing: Good Flight &Good Gliding (10 min 54 sec)


GosHawk 26iV 2mmEPP wing Light Ornithopter
With New GLDAB for Gliding.
Test Flight3. I added 0.8mm Carbon rod on wings for to increase thrust.
Good flight and Good Gliding.

Width 94cm Length 44cm Weight 69g Total 79g (160mA 2cell Lipo)

Receiver: OrangeRx R415 Spektrum DSM2 Compatible 4Ch Micro 2.4Ghz Receiver
Servo: HK-5320 Ultra-Micro Digital Servo 1.7g*2
Motor:C05XL Micro Brushless outrunner 10800kv
ESC: Cosmotec 7A 4.4g Max Power CT-7A V2.2
Gear:Main Gear:GWS Spur Gear IPS A 82TM0.3, Second Gear DIDEL M0.3 Outer 60T Inner12T SPurGear G260 (inner 12Tgear was exhaged by GWS 12T M0.3 copper pinion gear) ,Third Gear: DIDEL Outer48T Inner12T M0.3SpurGear G348, M0.3 9T PinionGear
Battery:Lipo2cell130mAh G3, 2cell160mAh G3,2cell180mAh G3
Wing: 2mm EPP
Control: 3CH (a motor, inverted Vtail: 2 servo)
Gliding system:New GLDAB

It follows TB30--- http://trhk.exblog.jp/i16/
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Last edited by Kazu-kaku; Dec 23, 2012 at 06:20 PM.
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Old Dec 23, 2012, 05:10 AM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
FalcoHobby 22iV Acrobatic Flight: Looping

FalcoHobby 22iV Acrobatic Flight: Looping

チゴハヤブサ FalcoHobby 22iV Acrobatic Flight: Looping (5 min 12 sec)


Good acrobatic flight. I added 1mm Carbon rod on wings for to increase thrust. Then, Loop is OK.
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Old Dec 28, 2012, 04:04 PM
Push
XXXmags's Avatar
Joined Jan 2008
308 Posts
Great ornithopters Kazu! The GosHawk 26iV particularly caught my attention because of it's motor and weight. I want to make an ornithopter with that same motor that has the capability of hovering continuously, so I have some questions about the GosHawk:

- I see you're supporting the spar of each wing with a metal wire. After having crashed the ornithopter a few times, have the impacts managed to bend the wire? I like the simplicity of this design but I worry about it's strength


- Has the crankshaft been bent after some crashes?


- What is the diameter of the wire the crankshaft is made from?

- What is the diameter of the wire that supports the wing spars?

- Do you know the static thrust that the wings produce at full throttle on a freshly charged battery?

- What is the flight time of the ornithopter in low wind conditions while doing no aerobatics and no gliding with a fully charged battery?

- Have you tried using a lighter material than EPP to make the wings, And if so, what have been the changes in performance?

Although this doesn't relate directly to the GosHawk what has been your experience with changing the tension of membrane wings and it's effect on stability? I've done some experiments with this and found that if there is a slight increase in static thrust there also a decrease in stability, maybe this has been the same in your case?

Anyhow good job on the ornithopters, you act as an inspiration for others
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Last edited by XXXmags; Dec 29, 2012 at 03:37 PM.
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Old Dec 28, 2012, 11:32 PM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
Quote:
Originally Posted by XXXmags View Post
Great ornithopters Kazu! The GosHawk 26iV particularly caught my attention because of it's motor and weight. I want to make an ornithopter with that same motor that has the capability hovering continuously, so I have some questions about the GosHawk:

- I see you're supporting the spar of each wing with a metal wire. After having crashed the ornithopter a few times, have the impacts managed to bend the wire? I like the simplicity of this design but I worry about it's strength
- Has the crankshaft been bent due after some crashes?
- What is the diameter of the wire the crankshaft is made from?
- What is the diameter of the wire that supports the wing spars?
- Do you know the static thrust that the wings produce at full throttle on a freshly charged battery?
- What is the flight time of the ornithopter in low wind conditions while doing no aerobatics and no gliding with a fully charged battery?
- Have you tried using a lighter material than EPP to make the wings, And if so, what have been the changes in performance?
Although this doesn't relate directly to the GosHawk what has been your experience with changing the tension of membrane and it's effect on stability? I've done some experiments with this and found that there is a slight increase in static thrust but also a decrease in stability, maybe this has been the same in your case?
Anyhow good job on the ornithopters, you act as an inspiration for others
A carbon rod of the opposite angle of wing prevents transformation of piano wire of a wing. Look attached picture.


What is the diameter of the wire the crankshaft is made from? -- 1.5mm

- What is the diameter of the wire that supports the wing spars? --1.5mm

- Do you know the static thrust that the wings produce at full throttle on a freshly charged battery? -- I do not know.

- What is the flight time of the ornithopter in low wind conditions while doing no aerobatics and no gliding with a fully charged battery? -160mAh about 5 minutes.

- Have you tried using a lighter material than EPP to make the wings, And if so, what have been the changes in performance? Orcon Film AN36. --Performance was Upped.

Although this doesn't relate directly to the GosHawk what has been your experience with changing the tension of membrane and it's effect on stability?
Tesnion UP --Stability Down. --Thrust UP

I've done some experiments with this and found that there is a slight increase in static thrust but also a decrease in stability, maybe this has been the same in your case? -- Yes.
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Last edited by Kazu-kaku; Dec 29, 2012 at 01:10 AM.
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Old Dec 28, 2012, 11:33 PM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
GosHawk 25iV with Articulation wing : First test Flight

GosHawk 25iV with Articulation wing : First test Flight

GosHawk 25iV with Articulation wing : First test Flight (6 min 14 sec)


Flight is OK.
Thrust is OK.

I learned this system from KJELL and FUSHIMIbird.
Thank you KJELL.
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Last edited by Kazu-kaku; Dec 29, 2012 at 05:16 PM.
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Old Dec 29, 2012, 02:30 AM
Registered User
therealthing691's Avatar
australia
Joined Apr 2007
2,100 Posts
i really like the flapping action and its ampitude isnt that fast either, good thrust great flight congratalations Doctor regards Brian
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Old Dec 29, 2012, 04:20 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,906 Posts
Enjoyed the vid,great breakthrough
how about the gliding porformance with Articulation Wing accroding to your flight experience
thanks for sharing
best regards
Sam
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Old Dec 29, 2012, 09:10 PM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
GosHawk 26iV Orcon film wing Light Ornithopter

GosHawk 26iV Orcon film wing Light Ornithopter
With New GLDAB for Gliding.
Good Flight and Gliding.


Goshawk26iV with Orcon film wing: Good Flight and Gliding (4 min 1 sec)
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Old Dec 29, 2012, 10:41 PM
PROFESSOR TRUTH JIMMY ICE
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United States, CA, Los Angeles
Joined Sep 2003
6,646 Posts
Beautiful..... speechless


Want....
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Old Dec 29, 2012, 10:49 PM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
GosHawk25iV with articulated wing

GosHawk25iV with articulated wing


GosHawk25iV with articulated wing Test Flight -- Good Flight and Gliding (6 min 11 sec)


So that the 0.8mm piano wire which I use in order to bend wings sags, I tied 1.4mm carbon rod beside piano wire.
By this sagging down of piano wire disappeared.
The wings came to turn well and thrusts increased.

A side to the body of this wings has Airfoil.
Width 94cm
Length 49cm
Weight 128g
battery Lipo 2cell 240mAh17g
Total flight weight 145g

Receiver: Castle Creations Berg Microstamp 4L 4Ch Micro Rx FM
cryistal: Castle Creations Micro Crystal Berg (72MHz)
Servo: Vtail: elevator & rudder (DM 4.7g servo *2)
Motor: Turnigy 1811 Brushless Indoor Motor 3800kv
ESC: H-KING 10A Fixed Wing BrushlessESC
Gear: Main gear: 66TM0.4 Acetal GWS EPS D (Stainless shaft3mm, 3mm ball bearing), First gear: 56TM0.4 GWS EPS 2 (=GWS IPS-42), 64P8TPinionWire(with 4mm ball bearing), Pinion Gear M04 10T(=64P 10T)
Battery: Lipo 2cell 240mAh G3
Film of a wing Orcon filmAN36
Control: 3CH (a motor, inverted Vtail: 2 servo)
Gliding system New GLDAB
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Last edited by Kazu-kaku; Jan 05, 2013 at 09:36 PM.
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Old Dec 29, 2012, 11:46 PM
Registered User
G-LO's Avatar
Va.Beach VA.
Joined Aug 2007
2,058 Posts
You are a REAL pioneer Mr. Kakuta. You're definitely one of the TOP Ornithopter engineers in present day history! You have made your mark....!

Excellent!
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Old Dec 30, 2012, 12:12 AM
K Kakuta
Kazu-kaku's Avatar
Joined Aug 2006
1,107 Posts
Quote:
Originally Posted by G-LO View Post
You are a REAL pioneer Mr. Kakuta. You're definitely one of the TOP Ornithopter engineers in present day history! You have made your mark....!

Excellent!
Thank you.
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Old Dec 30, 2012, 03:05 AM
Natural flight
Devabird's Avatar
Joined Oct 2012
10 Posts
Frequency

Hi Kazuhiko,

nice bird! you lowered the flapping frequency for this one. Usually what is the difference between the frequency with wings and without wings? is it divided by 2 or less?

Thank you,
Good work!
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Old Dec 30, 2012, 03:23 AM
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australia
Joined Apr 2007
2,100 Posts
Quote:
Originally Posted by Devabird View Post
Hi Kazuhiko,

nice bird! you lowered the flapping frequency for this one. Usually what is the difference between the frequency with wings and without wings? is it divided by 2 or less?

Thank you,
Good work!
i noticed that and think its great regards brian
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Old Dec 30, 2012, 03:24 AM
Registered User
therealthing691's Avatar
australia
Joined Apr 2007
2,100 Posts
Quote:
Originally Posted by G-LO View Post
You are a REAL pioneer Mr. Kakuta. You're definitely one of the TOP Ornithopter engineers in present day history! You have made your mark....!

Excellent!
I agree totally G-lo regards Brian
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