Curtiss-Wright Junior (oz808)
About this Plan
Curtiss-Wright Junior. Radio control scale 2-seater pusher model. Plan shows a Cox .049 motor.
Quote: "Scale model of a great light plane of long ago is ideal subject for 1/2A radio flying on rudder only. Curtiss-Wright Junior, by Robert Hawkins.
IN the late twenties and early thirties, the real romance of flying came from sitting in the breeze of an open-cockpit plane. One of those planes was the Curtiss-Wright Junior, a pusher airplane that was offered in two versions - first as a 40-hp landplane and second as a 60-hp amphibian. The landplane design lends itself well to becoming a sport-flying R/C ship of today. Let's look at the features which make it suitable for R/C flying:
1) Two open cockpits; the front one to house the receiver and batteries and the rear one as the location for the magnetic actuator.
2) A high-wing design with sufficient dihedral to provide good, inherent stability.
3) A pusher-mounted engine which eliminates propeller breakage even in rough fields.
4) An upswept fuselage in the nose area and a landing-gear position that combine to prevent nosing over upon landing.
5) The receiver and battery box are well protected in the front cockpit. There's practically no chance of getting oil or fuel near them with the engine in its high, rear-mounted location.
6) It's different from the usual R/C plane. It looks like a real airplane (at least to those of us old enough to have attended some of the pre-war Nationals meets).
One of the frustrating things that modelers sometimes find with some magazine or kit plans is the 'leave it up to the builder' attitude regarding location and choice of accessories. Most of us would like to know what actuator, battery box, wheels, etc the original builder used. We are listing the manufacturer of items we used in constructing this plane. Of course, many substitutions can be made.
1) Engine used on prototype: Cox Babe Bee.
2) Displacement range: .049-.051.
3) R/C equipment used on prototype: F&M Vanguard receiver, F&M GG-1 trans-mitter and Adams single magnetic actuator.
4) Types of alternate equipment: Any single channel equipment using escapement, magnetic actuators, or servos.
Much of the construction of this plane is straightforward and needs little explanation. Other items require some detailed explanation to make assembly as easy as possible.
Let's start with the wing. The leading edge is made from 1/2 x 1/2 in pre-cut LE stock and notched 3/32 deep by 1/16 wide for each rib, except where noted. Notching can be done quite easily, using an X-acto saw at each edge of the notches and then breaking out the center piece with a single-edge razor blade. Trailing edges are notched in the same manner. The wing spars are x 3/4 and 1/8 x 1/2 Sig spruce. Wing ribs can be cut from medium 1/16 thick balsa, but use R/C balsa for the ribs at the center dihedral joint and at the locations for mounting the engine nacelle.
Build the wing, except for the ribs adja-cent to the engine nacelle, and trim the leading edge, trailing edge and spars for proper dihedral angle. Assemble the dihedral joint, cementing all dihedral braces in place. Now, with the bottom of each wingtip rib raised 2-1/8 above the workbench surface, install the nacelle ribs with the engine nacelle sides in a vertical position. Cement the 1/8 plywood firewall in place after installing four 3-48 blind mounting nuts on the rear surface..."
Update 12/02/2019: Added article, thanks to RFJ.
Supplementary file notes
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
by Robert Hawkins
from American Aircraft Modeler
Tags: Scale IC F/F Parasol Pusher Civil
all formers complete :)
got article :)
Found online 25/04/2011 at:
Format: • PDFbitmap
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsColour photo of his completed Junior is thanks to SteveStaples. Quote: "Attached is a photo of my Curtis Jr set up on 3 channels with a PAW .03. The plan used was from American Aircraft Modeler."
SteveWMD - 09/11/2012
This plane plan is RC not FF.
hlsat - 09/05/2016
Not sure about this one, hlsat, it doesn't show any radio installation.
Mary - 09/05/2016
Hlsat is correct about OZ plan 808. This Curtiss Junior is for single channel R/C. Note F&M Vanguard RX and eyelet in tailpost for rudder torque rod.
RFJ - 09/05/2016
Thanks Ray - and hlsat! Amended now.
Mary - 09/05/2016
Add a comment
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
© Outerzone, 2011-2019.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.