Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Dec 19, 2011, 11:54 AM
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New Product

Grumman Ag Cat in 1:12 Scale


I've been looking at the Grumman Ag for years, and figured it might be a good time to work one up. The full scale is a huge airplane, with a wing span of 42' 4 1/2", so to keep it in line with the typical Park Flyer I decided to go with 1:12 scale with a 42 3/8" span.

Construction will be of the typical stick frame style to keep it light and strong, and a 400 class outrunner on two cells should provide very scale-like performance.
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Old Dec 19, 2011, 11:57 AM
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Starting with the Fuselage


The wings and tail are easy on this one, so I desided to start with the hard part and get it out of the way. The side frames are laid out over the plans, then joined begining with the formers at the bottom wing saddle.
Old Dec 19, 2011, 11:57 AM
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OMG finally!

Thank goodness. And a perfect size too.

Subscribed!

Tom
Old Dec 19, 2011, 12:00 PM
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Pressing On


The fuselage sides were cracked and the nose and tail pulled together and glued. The remaining formers were added, except where they would interfere with mounting the landing gear. The gear is a simple front/rear strut arrangement, and was bent to shape, lashed in place, then the last of the formers added.
Old Dec 19, 2011, 12:03 PM
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Fitting the Stringers


The upper and lower stringers were glued in place, then it was on to the sides. After the stringers were in place the fille was added to fair out the extreme front and rear sections. The servo mounts were located and glued in place, then the bottom stringers were removed to gain access to mount the servos.
Old Dec 19, 2011, 12:08 PM
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Fitting the Canopy Assembly


The canopy assembly was built in place on the fuselage to insure proper alignment. The assembly was then removed and sanded to shape. The top was faired with a foam block, then when rough shaping was done a coat of drywall mud was applied for final filling and contouring.
Old Dec 19, 2011, 12:10 PM
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Building Up the Motor Mount and front Fairing Block


The front fairing block was vut from blue foam and glued in place. The motor mount was then assembled, the motor mounted, then fitted into the fuselage.
Old Dec 19, 2011, 12:24 PM
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Mounting the Servos and detail sanding


The Servos were mounted on the rails, then the assembly was detail sanded to complete the frame-up. From here it'll be onto the tail section, so stay tuned. This one is actually going together quicker then I had expected.

PAT
Old Dec 19, 2011, 12:26 PM
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Very cool! I wonder who will be the first to do Gene Soucy's airshow ride?
Old Dec 19, 2011, 05:21 PM
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There's someone flying an Ag-Cat at airshows? Cool! Looka like it's a bit tricked-out...

This is probably my favourite ag-plane. Looking forward to seeing how the build turns out!
Old Dec 20, 2011, 07:33 AM
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Quote:
Originally Posted by CF105 View Post
There's someone flying an Ag-Cat at airshows? Cool!
Yep. Gene Soucy flies the Showcat which is his modified Ag-Cat. Read about it here.
They were also used by Rosie O'Grady's Flying Circus down around Orlando back in the 80's if I recall correctly.

Tom
Old Dec 21, 2011, 08:15 AM
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I can't wait til this is kitted! I've been working on a 1/10 scale turbo version from foam and I'm modifying the plans of Floyd Fitzgerald's 90" version for the extended tail and wings.
I'm doing the 1/10 scale like the one my cousin flies.

The original AgCat had a 35'-11" top wing span. Then the super "B" model the ws went to 42'-4 1/2" and the top wing was also raised several inches.

Here is a pick of my cousin's AgCat with the Hershey wing tips and extended tail.
Old Dec 21, 2011, 08:37 AM
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Quote:
Originally Posted by CF105 View Post
There's someone flying an Ag-Cat at airshows? Cool! Looka like it's a bit tricked-out...

This is probably my favourite ag-plane. Looking forward to seeing how the build turns out!
Here's a pic of another Cat for shows!
http://cdn-www.airliners.net/aviatio.../2/1944223.jpg
Old Dec 21, 2011, 08:41 AM
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Quote:
Originally Posted by CF105 View Post
There's someone flying an Ag-Cat at airshows? Cool! Looka like it's a bit tricked-out...
Oh yes! I saw Soucy fly his Showcat a few years ago and really enjoyed it. Edges and Extras are great but IMO aerobatics are best flown low, slow, with two wings, and a round engine.

Enjoy!

Gene Soucy at Oshkosh 2006 (7 min 3 sec)


(Pat, sorry if this is off topic!)
Old Dec 21, 2011, 09:52 AM
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Building Up the Tail Section


he vertical and horizontal stabilizers are just a common stick frame, so nothing fancy here. The frames were built over the plans, then sanded and the hinges cut in.


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