Gulfhawk Jr Stinson 105 (oz15296)


Gulfhawk Jr Stinson 105 (oz15296) 1939 - plan thumbnail

About this Plan

Gulfhawk Jr (Stinson 105). Free flight scale model for rubber power.

Planfile includes build instructions.

Quote: "Before starting construction, be sure to read the following instructions and study the plan carefully so as to familiarize yourself with every step in the actual construction.

Cover the plan with a sheet of wax paper. This will keep your work from adhering to it.

Fuselage: The conventional square framework construction is employed as the simplest and most accurate method. Start with the sides and when they are completed, join them together with the cross struts. Now add on all the formers according to their designation. Put on the stringers; you will notice that all the stringers do not set flush with the top of the formera, but go in to the depth of the notches in the formers. The nose is built up as shown in the nose detail sketches at the bottom of the plan. Cement the rear hook in place.

Landing Gear: Cut out and shape all the parts from balsa wood. The landing gear is assembled on to the fuselage framework before covering the model and cemented securely in place. See perspective drawing. Use plenty of cement.

Empennage: The entire construction is of 3/32 square balsa. Curved outlines are cut from printed piece and cemented in place.

Wings: Start construction by pinning the leading and trailing edges down on the plan and cementing in the tip outlines. While these are drying, cut out the ribs from the printed pieces. Now raise the leading edges up on the pins to the proper height and glue in the ribs. Fit the top center spars into the notches, touching each joint with a drop of cement. Turn wings over and slip in the bottom spars.

Covering: Cover each part separately with tissue paper, using banana oil as an adhesive. Always cover with grain of paper running lengthwise. In the fuselage, cover the windows with cellophane before applying tissue to the rest of the fuselage. In places where there is a compound curve, cover only a small section at a time. Wherever stiff paper is to be used, the best results are obtained by using regular mechanical drawing paper. However, any kind of stiff bond or letter paper may be used. Striping and numerals are cut from paper of a contrasting color and applied with banana oil.

Propeller: Carve and sand the propeller smooth, then attach propeller shaft, washers, thrust bearing and spinner, and install on the model. Hook on the rubber motor to the propeller shaft and rear hook, then your model is ready for its test flight.

You will need a piece of soft iron wire to draw the rubber through the fuselage.

Flying: The original model has been found to balance perfectly so that any model, if built to specifications, should be very slightly off balance, if any. Don't risk your model in any cramped field or lot when flying. Make sure you have plenty of room to fly in as collisions will prove disastrous to any model.

No doubt you have greatly enjoyed building this superb model! Megow's would like to hear from you as to your success with it and any comments you may wish to make."

Direct submission to Outerzone.


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Gulfhawk Jr Stinson 105 (oz15296) 1939 - model pic

  • (oz15296)
    Gulfhawk Jr Stinson 105
    from Megow (ref:J-14)
    30in span
    Scale Rubber F/F Cabin
    clean :)
    formers unchecked
  • Submitted: 27/04/2024
    Filesize: 1238KB
    Format: • PDFbitmap
    Credit*: dfritzke
    Downloads: 412

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Gulfhawk Jr Stinson 105 (oz15296) 1939 - pic 003.jpg

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* Credit field

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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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