HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Dec 01, 2012, 12:57 PM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
Build Log
Flying Fish.....video added

I wanted to do some sort of zoomorphic airplane and after looking at birds, bats, and dragons, I came across a photo of a flying fish. The body reminded me of the fuselage on my Ki-46 Dinah. Since I already had the fuselage mold, I decided this would be a good choice.

The pectoral fins (wings) will be about 54", I'll use the pelvic fins as stabilators. At the moment, I'm thinking just AET for controls. I'll use a curved KF3 wing.

I dusted off the Dinah molds and a couple hours later I had the fuselage shells molded. I glued in a couple 3 mm bamboo rounds (from a roll up blind I found at a home center) to add some compressive strength to the tail area.
pmullen503 is online now Find More Posts by pmullen503
Last edited by pmullen503; Dec 17, 2012 at 05:04 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Dec 01, 2012, 01:40 PM
Registered User
Joel K. Scholz's Avatar
Kingsland, Texas USA
Joined Aug 2000
2,401 Posts
subscribed.
Joel K. Scholz is offline Find More Posts by Joel K. Scholz
Reply With Quote
Old Dec 01, 2012, 02:57 PM
Fremont, CA
United States, CA, Fremont
Joined Jan 2009
1,552 Posts
I'm flying with this fish...
djacob7 is offline Find More Posts by djacob7
Reply With Quote
Old Dec 01, 2012, 03:08 PM
I ask a lot of questions.
Canada, AB, Airdrie
Joined Aug 2012
160 Posts
This one I gotta follow
Disco Stew is offline Find More Posts by Disco Stew
Reply With Quote
Old Dec 01, 2012, 07:31 PM
Registered User
Joined Sep 2006
794 Posts
Awesome I've always wanted to see this!
b36roxs is online now Find More Posts by b36roxs
Reply With Quote
Old Dec 01, 2012, 08:12 PM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
Got the internal structure in place and the halves glued together. The shells are made from $tree foam. The weight of the 30 in long shells alone is only 26g (excluding the tape covering.) I'll leave the tape on (the tape is essentially the female mold of the forming process) until I'm ready to cover it with kraft paper and WBPU to keep it from getting too beat up.

I decided to angle the stabilators (fins) down 15 degrees. I had originally drawn them with more down angle with the idea that I could use them like an inverted V tail and get some yaw control. But that would put them in the dirt on every landing so that wasn't going to work. The current angle will keep them just off the ground. I'm hoping the plane will rock forward on landing, saving the fins. Plan B will be to add some wire skid landing gear to keep them well off the ground if they are getting too beat up.
pmullen503 is online now Find More Posts by pmullen503
Last edited by pmullen503; Dec 02, 2012 at 07:33 AM.
Reply With Quote
Old Dec 02, 2012, 05:59 PM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
I pulled the tape off and block sanded the fuselage smooth. Then I gave it a coat of WBPU to harden it up.

Next, I covered the fuselage with lightweight kraft paper and WBPU.
pmullen503 is online now Find More Posts by pmullen503
Reply With Quote
Old Dec 02, 2012, 11:57 PM
Fremont, CA
United States, CA, Fremont
Joined Jan 2009
1,552 Posts
How about a slight variation on the fuselage...
(Stumbled onto this pic and just had to add it here)
djacob7 is offline Find More Posts by djacob7
Reply With Quote
Old Dec 03, 2012, 12:34 AM
Fremont, CA
United States, CA, Fremont
Joined Jan 2009
1,552 Posts
Oh no! Not another one!
(Hope you guys don't mind).
djacob7 is offline Find More Posts by djacob7
Reply With Quote
Old Dec 03, 2012, 04:44 AM
DIY Mania from Taiwan
Taiwan
Joined Aug 2011
1,834 Posts
Loking forward to the maiden flight of your lovely flying fish
am a flying fish fun too
regards
Sam
20110626_19de2cdd186ef6b8c1d081rlNuRiaHGl_jpg_thum b
samwei1950 is offline Find More Posts by samwei1950
Reply With Quote
Old Dec 03, 2012, 10:36 AM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
Quote:
Originally Posted by djacob7 View Post
How about a slight variation on the fuselage...
(Stumbled onto this pic and just had to add it here)
Creepy!

Quote:
Originally Posted by djacob7 View Post
Oh no! Not another one!
(Hope you guys don't mind).
Sweet!

Quote:
Originally Posted by samwei1950 View Post
Loking forward to the maiden flight of your lovely flying fish
am a flying fish fun too
regards
Sam
20110626_19de2cdd186ef6b8c1d081rlNuRiaHGl_jpg_thum b
Cool!
pmullen503 is online now Find More Posts by pmullen503
Last edited by pmullen503; Dec 03, 2012 at 10:57 AM.
Reply With Quote
Old Dec 03, 2012, 11:05 AM
Registered User
Snuffleupagus's Avatar
Boston, MA
Joined May 2003
163 Posts
This is looking to be a great build. Subscribing!
Snuffleupagus is offline Find More Posts by Snuffleupagus
Reply With Quote
Old Dec 03, 2012, 03:43 PM
Unregistered User
Commander Clumsy's Avatar
Belgium, famous for its brushless sprouts
Joined Feb 2007
295 Posts
Quote:
Originally Posted by samwei1950 View Post
Loking forward to the maiden flight of your lovely flying fish
am a flying fish fun too
regards
Sam
20110626_19de2cdd186ef6b8c1d081rlNuRiaHGl_jpg_thum b
Whatever we try, the Chinese will have done it before.

Specifications, plans, other things you care to share?
Commander Clumsy is offline Find More Posts by Commander Clumsy
Reply With Quote
Old Dec 03, 2012, 04:25 PM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
Quote:
Originally Posted by Commander Clumsy View Post
Whatever we try, the Chinese will have done it before.

Specifications, plans, other things you care to share?
The "plan" I'm working from is in the first post. The fuselage is from an earlier build. Check that thread to find out more about the heat formed foam technique. The fuselage is about 30" long.

Wingspan will be about 54", approximately 300 sq in. Weight 16 to 20 oz. depending on the motor and battery I use. I'll pick that once I get the air frame built and see where I am on CG.

I'm kind of designing as I go but I'll try to post anything that doesn't seem obvious.
pmullen503 is online now Find More Posts by pmullen503
Last edited by pmullen503; Dec 03, 2012 at 06:44 PM.
Reply With Quote
Old Dec 03, 2012, 06:42 PM
Registered User
United States, WI, Fond du Lac
Joined Sep 2008
1,614 Posts
Wings

I'm making the wing from $tree foam using a standard KF3 airfoil with steps at 50% and 75%. I tested out a way to make a curved wing on my old Supercub. I did my best to break it and it held up so I'll use the same method here.

The building board is a piece of 1/4" plywood screwed to a heavier backing board with the outer 8" curved upward. The pieces are glued together on the board and weighted down with sand bags while the glue dries. The top piece was rolled over some pipe to form the leading edge before being glued down.

After the glue was set, I cut slots for the 1/8" plywood dihedral brace.
pmullen503 is online now Find More Posts by pmullen503
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion flying fish, started any ideas micka80ella Foamies (Scratchbuilt) 3 May 31, 2012 04:10 PM
Help! 7006 Flying Fish A-6 change frequency Gavo Racing Boats - Electric 0 Apr 18, 2012 07:24 AM
Discussion Flying and fishing not Fly-fishing. DWA Slope 16 Jul 26, 2010 08:50 AM
Yippee! New HD Fish (yes, flying fish) hybris 3D Flying 12 Apr 27, 2004 10:42 PM