Cajun Queen (oz7813)

 

Cajun Queen (oz7813) by Lou Penrod from American Aircraft Modeler 1973 - plan thumbnail

About this Plan

Cajun Queen. RC pattern plane. Wingspan 62 in, wing area 680 sq in. Webra .60 Blackhead shown.

Quote: "Well proven features and easy handling in any kind of wind make this a frequent Class C or D Pattern winner. Cajun Queen, by Lou Penrod.

Cajun Queen? Wondering what it is? Well, looking it up in the dictionary you'll find that 'Cajun' refers to a very special group of people of French descent that predominantly reside in the Gulf Coast States. A more hospitable or friendly people you will never meet. Queen means the same in any language - a gracious, beautiful lady. I like to think that this describes this airplane exactly.

When I first started thinking of this airplane, I wanted a plane that would perform in windy weather but wouldn't be a dog in calm weather. Being a genius in aerodynamics, I decided I'd better stay with the proven airfoils and mo-ments of other airplanes. The wing root section is 15% symmetrical tapering to a lifting tip. The first planes were 650 sq. in. with fixed gear and 61/2 to 7 lb. but with retracts and FAI Pattern (and weight requirements) the wing was increased to 680 sq. in. Most of the planes have been 7N to 81/4 lb. and handled really well in the wind. The stabilizer, which is Diamond airfoiled, does two things. It increases the amount of drag at the rear of the plane which decreases the tendency to tail waggle and also lets the elevator be soft around neutral.

Now for some Balsa Butchering. To start with, select some light fuselage sides. Cut the 1/32 plywood fuselage doubler F-10 and glue them to the fuselage sides. While these are drying, cut out all the remaining parts. Glue 1/32 balsa doubler F-10 A to fuselage sides, glue 1/4 balsa doubler F-11 to fuselage sides, glue 1/16 plywood F-12 to fuselage sides, glue 1/4 balsa doubler F-9 to rear of sides being sure to leave room for the 1/4 sq on the bottom. Now glue the top and bottom rear 1/4 sq longerons to fuselage sides; at this time you can glue the 1/8 x 1/4 cross bracing to the sides.

To assemble the fuselage you need a good flat surface. This step is one of the most important steps in building any airplane. If you don't have a building jig, take 1/4 plywood or hard balsa and make eight vertical side braces. These braces have to be exactly square. Now position the sides over the plans with F-2 position just off the building surface. Starting with F-2, glue F-2, F-3 B F-6, and F-8 between the sides. Using the vertical braces at all former loca-tions, align the sides so they are exactly square. Take your time with this and your fuselage will be true. After this has dried, pull the tail together and glue inserting a 1/2 in wedge between sides.

Now install F-13, F-16, F-14 and 1/4 sq cross braces; after it has dried, remove the fuselage from the board and with epoxy completely paint the tank compartment. Now add top formers F-3A, F4, F-4A, F-5, F-6A, F-7, and F-8A. Sand the taper into the fuselage top sides to accept the 3/8 sheet balsa for the turtle deck. Glue the two 3/8 sheet balsa sides into place; when dry, sand the top down to the formers and add the top 3/8 sheet. Glue the nose block in place and carve the top to shape. Now install the 3/32 balsa bot-tom rear fuselage. Glue 3/8 sheet to bottom front adding the triangle stock between F-13 and F-3B. Add F-1, F-1A and carve scoop and turtle deck to shape. Sand complete fuselage. The rudder is conventional built-up with 1/16 sheet on each side of the 1/4 stock. Be sure and glue the dorsal fin and rudder onto the vertical fin before sanding to shape.

Now for the wing and stab. The cores are easy to cut, but if you can't cut them, they are available through Mercury Hobby Distributors of New Orleans, Louisiana. Cover the wings with as soft a balsa as you can purchase, being sure not to get the panels mixed. (The lifting tip doesn't work too well upside down!) Install the trailing edge of the stab; then cover with soft balsa, using eight pieces and keeping the high point..."

Hi Mary/Steve - Here is Lou Penrod's Cajun Queen from American Aircraft Modeler magazine issue 03-73.

Direct submission to Outerzone.

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Cajun Queen (oz7813) by Lou Penrod from American Aircraft Modeler 1973 - model pic

Datafile:
  • (oz7813)
    Cajun Queen
    by Lou Penrod
    from American Aircraft Modeler (ref:775)
    March 1973 
    62in span
    IC R/C LowWing
    all formers complete :)
    got article :)
  • Submitted: 17/06/2016
    Filesize: 538KB
    Format: • PDFbitmap
    Credit*: theshadow

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Scaling

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.

 

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