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Old Jan 18, 2015, 04:56 PM
TEAM HORIZON
Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
2,559 Posts
Build Log
110" Republic Twin Seabee ( Twinbee )

Hi gang.
A buddy( Rob) and I have been sitting on plans to build a giant scale Seabee for a couple years. In the mean time we bought a GP sales Sea bee kit an assemble it with an electric power system. Overall, its a good flying plane, but the lack of prop clearance limits the power and thrust you can have.
Moving to the scratch build project, we took a set of plans and had them blown up to the size we wanted.

Since this is a scratch build, not laser cut parts, no fiberglass cowl or floats, we'll be making our own.

The plane is being designed to accept the EVO 20cc motors. http://www.horizonhobby.com/20gx-20c...carb-evoe20gx2
They're on order now and I expect to have them this week. We already have an EVO 33 in a Hangar 9 Beaver and couldn't be happier with the performance, so its a no brainer to use a pair of 20cc motors in this build.
The plan shows a single engine plane, so we'll be modifying to make it a twin.

First thing we're doing is building the wing. Thats the most difficult part of this build, do we'll tackle it first.
The wing is a three piece setup, with the center section originally designed to stay with the fuse. We'll change it slightly and make the center section wider, incorporation the dihedral and the two motors. Doing this, the outer wing panels will simply slights right onto the wing tubes.

Off we go.
We cut most ribs out of 1/8 balsa, the rest are 1/8 a/c ply where the motors will attach, The panels will be capped with 1/8 liteply.
After that was accomplished, we clamped them all together with a ply rib on each side and touched up the tops and bottoms with a sanding block. The spar cutouts were also sanded to perfection while they were clamped together.

Setting the ribs aside, we designed out spar system and build the spar box. Our plan is to build an A/C ply spar, which incorporates a hollow for the 7/8 aluminum tube which attaches the outer panels. West Systems epoxy and a bunch of clamps will soon produce a bullet proof center spar.

The build will take time, we only get a couple evenings a week to work on the plane, so I hope you'll stick around and see what the results are.

LEN
RcAerotowing.com
Team Horizon
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Old Jan 19, 2015, 03:44 AM
Slip the surly bonds...
Sopwith Mike's Avatar
Christchurch,England
Joined Aug 2004
2,790 Posts
A great project, and despite its size will be a lot quieter than any single-engined Bee!
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Old Jan 19, 2015, 07:08 AM
TEAM HORIZON
Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
2,559 Posts
And faster than the full scale too, even with one engine out. lol
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Old Jan 19, 2015, 11:30 AM
boat butcher
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Whittier CA.
Joined Oct 2009
1,502 Posts
.

Mark
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Old Jan 23, 2015, 09:25 PM
TEAM HORIZON
Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
2,559 Posts
The spar was allowed to cure and then trimmed to size. Very strong.
Our motors arrived from Horizon Hobbies, wow, these are really nice motors. Excellent machining and great muffler system.
We'll be starting to frame the wing soon.
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Old Jan 24, 2015, 01:44 PM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
2,025 Posts
This should be fun !

subscribed

Bart
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Old Jan 24, 2015, 01:49 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
2,278 Posts
Old school,, cutting with saws and stuff,,, cool
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Old Jan 25, 2015, 10:38 PM
TEAM HORIZON
Lbuff1's Avatar
Killingworth CT
Joined Nov 2008
2,559 Posts
Thanks guys.
Since I had a little time today while the epoxy was curing on a large scale sailplane I'm assembling, I thought I would draw up the cowl and Nacelle for the 20cc motors.

Believe it or not, I think I got it the first time through!!!

Yippee

LEN
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