Invader (oz11178)

 

Invader (oz11178) by J Richards from Model Airplane News 1955 - plan thumbnail

About this Plan

Invader. Simple hi-start glider. Wingspan 28 in, wing area 90 sq in.

Quote: "Combining catapult and towline systems of launching, this big glider soars like a bird. Cord and rubber towline does it.

Those of us who have visited model flying fields have often noticed model builders loaded down with equipment, sweating over balky motors. The modelers having the most enjoyment with the least expense and trouble usually are those flying gliders. Why? No worries about batteries, wires, fuel, pump cans, propellers, etc. For this reason the Invader glider was designed to combine the spectacular climb of the catapult glider with the soaring glide of the graceful model sailplane. This was achieved through the use of Hi-Start, an ingenious launching method combining the best features of catapult and towline launches. With proper adjustment, the Invader should turn in flights of several minutes' duration. Construction is sturdy and simple and may be completed in a single evening.

Wing: Cut wing outline from 1/4 in sheet balsa, 4 x 28 inches in dimension. If 4 in wide balsa is unavailable, two 2 inch wide sheets may be butt-jointed together and cemented to form a 4 in chord. Trim with single-edge razor, then sandpaper to final airfoil shape.

Lightening holes may now be cut and sanded smooth. However, lightening holes in wing and stabilizer are optional and may be omitted for maximum durability, an important factor in sport flying. Wing dihedral joint is now cut and cemented, with tip blocked up for specified amount of dihedral.

Fuselage: Cut three pod sections from 1/4 in sheet balsa. Tail boom is made from 1/4 x 1/2 in pine or basswood strip 21 inch in length. Taper tail boom and cement to center pod section. Notch pod for ballast box. Cement outer pod sections in place on each side of fuselage. Trim and sand fuselage to streamline crosssection.

Tail: Stabilizer and rudder are cut from 1/8 sheet balsa. Trim and sand to airfoil section. Cut lightening holes in stabilizer and sand smooth. Stabilizer dihedral joint is now cut and cemented, with stab tip blocked up for specified dihedral..."

Invader, MAN, December 1955.

Direct submission to Outerzone.

Update 23/05/2019: Added OCR version of article, thanks to rchopper56.

Supplementary file notes

Article pages, thanks to RFJ.
Article (OCR).

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Invader (oz11178) by J Richards from Model Airplane News 1955 - model pic

Datafile:
  • (oz11178)
    Invader
    by J Richards
    from Model Airplane News
    December 1955 
    28in span
    Glider F/F
    all formers complete :)
    got article :)
  • Submitted: 16/05/2019
    Filesize: 308KB
    Format: • PDFbitmap
    Credit*: Circlip, RFJ

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Download File(s):
  • Invader (oz11178)
  • Plan File Filesize: 308KB Filename: Invader_28in_oz11178.pdf
  • Supplement Filesize: 1147KB Filename: Invader_28in_oz11178_article.pdf
  • Supplement Filesize: 146KB Filename: Invader_28in_oz11178_article_ocr.pdf
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Notes

* 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.

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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