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Old Mar 15, 2016, 10:12 PM
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Building the 42" Waco SRE


After months of interruption and distraction I got the plans finished up for the 42" Waco SRE and the P-Type finally under construction. The model will be set up with 5 Ch. R/C and a 400 Outrunner on 2 cells with a target weight of around 18 oz.. So now that we have a plan and parts in hand lets get started.

Construction began with the main landing gear so it would be ready when the time came to install it. All of the wingtip and tail section bows were made up as well so's not to slow progress when they were needed. For more info on that process, look in on my web site at; http://patscustom-models.com/bowedoutlinres.html.
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Old Mar 15, 2016, 10:14 PM
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Framing the Tail Section


The vertical and horizontal tail assemblies are framed directly over the plan. Once the assemblies were finished they were lifted from the plan, sanded to shape, and the hinges glued in place.
Old Mar 15, 2016, 10:16 PM
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Building the Fuselage


The fuselage side frames are built directly over the plans. The sides are identical except for the elevator push rod guide on the right hand side, and the later placement of the landing gear mount beam supports.
Old Mar 15, 2016, 10:21 PM
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Joining the Sides


Joining the frames begins by pinning the rear landing gear mount beam to the plan and placing the frames in place on it. The top cabin formers and instrument panel are then fitted and glued in place followed by the balsa cross piece at the aft end of the cabin.

The frame is then removed from the board and the front landing gear beam and the aft cross pieces added.
Old Mar 15, 2016, 10:24 PM
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. . . .Then Moving Rearward. . . .


The tail post id pulled together, aligned, and glued together. Now all of the top and bottom cross pieces can be fitted and glued in place. Then moving back toward the front, the firewall is assembled and glued in place on the frame.
Old Mar 15, 2016, 10:33 PM
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Adding the Stringers and Fairings


The top and side stringers are done first. The window frames and boot cowl are made up from file folder paper and glued in place.

Before the bottom stringers are added, the landing gear is lashed in place on its mount beams, and I would suggest that now would be a good time to build up the servo mounts, mount the servos, and run in the elevator push rod tube. The rudder cables should be run in as well, and the exact location where they exit the fuselage noted on the plans for reference after the model is covered.

Then once all that is done, the bottom stringers can be added, and the hatch opening set up
Old Mar 15, 2016, 10:38 PM
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Setting Up the Motor Mount and Cowl


The motor mount is built up and the motor mounted. I used a Suppo 2212/15 motor w/ a 20A ESC. It doesn't need that much capacity, but the ESC has a 3 amp BEC, and because 6 servos are used I thought the extra capacity would be a good idea.

The false engine is fitted into the cowl, and the cowl then fitted on the fuselage and screwed in place.

Meanwhile, stay tuned, more to come real soon.
Old Mar 15, 2016, 10:56 PM
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The "pro" in procrastination
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What could be better than a new Pat Tritle design and a detailed build thread?

Steve
Old Mar 16, 2016, 12:20 PM
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The framed up and bare fuselage shot really looks nice.

Who will be selling this one?
Old Mar 16, 2016, 12:24 PM
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Building the Bottom Wings


The bottom wing is easy; the main spar, a few ribs plus the leading and trailing edges and the tip bow. Then once the wing is assembled, the strut retention tabs are added and it's done.
Old Mar 16, 2016, 12:30 PM
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Building the Top Wings


The top wing is a little more complex due to the flaps and ailerons and their related servos and wiring. The wing is also done up "egg crate" style, so assembly is fairly straight forward. The aileron servo trays also incorporate the strut retention tabs. Bracing is added at the root to prevent the rib from pulling in when the cover is shrunk. The bottom bracing is flush with the bottom, but the top is inset a bit so's not to make contact with the cover. The tip bracing is put in on center.

The flaps and ailerons are built along with the main wing and cut free after the major assembly is complete. The wing is sanded to shape and the servos secured in place with silicone caulk.
Old Mar 16, 2016, 12:38 PM
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Building the Interplane Struts


The interplane struts are laser cut and are assembled over the plan. The brass joiner tubes were cut to length and fitted into the wings, then the wings test fitted into the fuselage. As it turns out, the struts fit perfectly -- something that rarely happens, so setting up the wings was as simple as it can get.

They're not shown in the photos, but the rigging blocks will be added to the top and bottom wing roots. The model will be rigged with the double flying and landing wires, and the wings will slide off in pairs should transport be an issue.
Old Mar 16, 2016, 12:40 PM
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Quote:
Originally Posted by jonquinn View Post
The framed up and bare fuselage shot really looks nice.

Who will be selling this one?
Jon, This one will be a Short Kit available from Manzano Laser. As soon as she's finished and flown I'll get the plans buttoned up and I'll be Charlie won't waist any time getting the kits ready to go.

PAT
Old Mar 16, 2016, 12:49 PM
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Building Up the Wheel Pants and Landing Gear Fairings


The wheel pants were built up using a .035 styrene rod on the inside to reinforce the seem. For the full story on how to build these up please visit the web site here; http://patscustom-models.com/wheelpants.html

The landing gear fairings are built up from 3 laminations of 1/16 balsa. The outer and middle layers are glued together, then fitted and glued in place on the strut. The inner layer is then trimmed to fit and glued in place. The fairings are shaped and sanded in place on the landing gear.
Old Mar 16, 2016, 12:52 PM
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Should be a nice flying model that fits in a small car. I remember building a Sterling SR-E, a dinosaur ate it.


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