Inspirer (oz8947)


Inspirer (oz8947) by Frank Tlush from Air Trails 1937 - plan thumbnail

About this Plan

Inspirer. Free flight gas model.

Quote: "Plans for building a rugged gas model designed especially for beginners - the first of two installments. Inspirer, by Francis Tlush in collaboration with Gordon S Light.

THE INSPIRER was developed especially for Air Trails model enthusiasts. It is intended for those builders who haven't, as yet, built a gas model, or for those who haven't had much success with other difficult gas models. The Inspirer will tickle your modeling fancy and will give you much pleasure and enjoyment. And, too, the small cost of building this model will not warp your budget.

Construction is simple. However, clean lines and streamline appearance have not been sacrificed. With relatively little work the beginner can obtain an even footing with the expert through the championship performance of the Inspirer.

CONSTRUCTION. Fuselage: Fuselage construction is different from the methods usually used. There is little work involved. And, even better, there isn't much chance of your building the fuselage incorrectly. It won't be necessary to draw the plans full-scale. Merely following the dimensions given in the reduced drawing will supply all the necessary information.

First obtain 2 perfectly straight pieces of 3/8 x 3/8 x 52 inch spruce or bass, which serve as the basic fuselage longerons for the model.

Next cut the plywood motor mounts out of 1/8 birch or poplar plywood. Two pieces will be necessary - one for the top and the bottom of the main longerons. These pieces are secured to the longerons with small nails and cement. The rear ends of the longerons are now drawn together and fastened with small brads and cement.

The various positions of the cross pieces can be marked off and the corresponding cross pieces cemented in position. The cross pieces up to #9 are of hard wood, the remainder are made of balsa. The longerons between station #9 and the rear of the fuselage are gouged out as shown on the drawing. This is done to remove all unnecessary weight.

After the main basic fuselage structure is completed the upper structure is added. Be careful to cut the front-cabin uprights and the rear-cabin uprights correctly to the proper length. The front ones are 3/16 higher than the rear ones. The top of the fuselage in the rear curves to a point, forming a triangular shape toward the rear.

Bulkheads are cut from 1/8 stock. The widest bulkhead is 3-1/2 in wide and it will be necessary to join 2 sheets of balsa. Merely coat the edges of the balsa with cement and press them lightly together, allowing enough time to dry. The balsa will be joined sufficiently strong for use as a bulkhead.

Bulkheads #4, 5, and 6 are cut out as shown for the battery box. The notches for the stringers - other than the main one - are cut after they have been cemented in position and the main stringer or keel has been added..."

Scan from DBHL, cleanup by theshadow.

ref DBHL-6759.

Direct submission to Outerzone.

Update 27/03/2019: Added article, thanks to RFJ.

Note the article pages include some useful further drawings that are not show on the main plan drawing inc motor mount, landing gear templates, prop blank, ignition system etc.

Supplementary file notes



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Inspirer (oz8947) by Frank Tlush from Air Trails 1937 - model pic

  • (oz8947)
    by Frank Tlush
    from Air Trails
    October 1937 
    78in span
    IC F/F Cabin
    all formers complete :)
    got article :)
  • Submitted: 11/07/2017
    Filesize: 666KB
    Format: • PDFbitmap
    Credit*: DBHL, theshadow

Inspirer (oz8947) by Frank Tlush from Air Trails 1937 - pic 003.jpg

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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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