Early Riser (oz9346)


Early Riser (oz9346) by P Sainsbury 1980 - plan thumbnail

About this Plan

Early Riser. 100S Class themal soarer for two function radio using all flying V-tail.

Quote: "BY MAKING specific restrictions on the number of control functions, and on the maximum size of the models to be used, the 100S class of glider has brought truly competitive flying within the reach of all thermal flyers. The comparatively small size of the models keeps the airframe costs down and, with just two-function radio required, 100S soaring becomes one of the most economic of all r/c model classes. The Early Riser has a two-piece wing, making for easier transport, and uses a sliding servo mixer to obtain the correct-action on the all-moving tail surfaces.

There is nothing unusual about building, so let's get right into the constructional side of things.

CONSTRUCTION: Fuselage: Carefully choose the medium-hard 3/16 balsa for the fuselage, to ensure that the sides will be equally matched. Splice together the front and rear sections of the sides, and add the triangular-section longerons. Cut out the one and only bulkhead, and the top decking from 1/2 in balsa sheet. With careful cutting, two decks can be cut from one 3 x 36 in sheet, a good excuse for making a spare fuselage!

It's at this point that the sequence changes slightly from normal. Place the sides, top down, over the plan view of the fuselage and, using scrap sheet as spacers, pin the fuselage sides the correct distance apart at the wing bay ends, top and bottom of the fuselage. Now draw the nose together and glue in the nose bulkhead (not worth calling it 'F1'); also pull in the rear sides to the tail block. Add the cross-grain sheeting to the underside, hard sheet from the nose to the rear of the wing bay, softer sheet from there to the tail. Cut the front face of the top decking to the correct angle, remove the temporary spacers, and glue the wing seat doublers into place followed by the top decking. Now the fuselage may be carved and sanded to final shape. Fit the 'outers' for the cable linkage to the tail and epoxy them securely at each end.

Give the inside of the fuselage from the rear of the wing bay forwards a liberal coat of clear dope. Cut a piece of heavyweight glassfibre mat to fit within the fuselage area previously doped. Stipple in plenty of resin to ensure that the mat takes up the exact contours of the interior. Before the resin sets, add the top block between the wing bay and the canopy. I can certainly guarantee one thing - if the interior is not reinforced the fuselage will break in half in a very short period of time.

The canopy may now be added, first the 3/16 sheet base and then the 1/2 in soft block to make up the outline. After carving to shape..."

Early Riser, Radio Modeller, January 1980.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.


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Early Riser (oz9346) by P Sainsbury 1980 - model pic

  • (oz9346)
    Early Riser
    by P Sainsbury
    from Radio Modeller (ref:222)
    January 1980 
    100in span
    Glider R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 21/10/2017
    Filesize: 644KB
    Format: • PDFbitmap
    Credit*: Circlip, RFJ

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