Chaos (oz11689)


Chaos (oz11689) by Peter Freebrey 1963 - plan thumbnail

About this Plan

Chaos. Control line combat model.

Note parts are shown at full size, general layout is shown at 1/3 scale.

Quote: "Peter Freebrey's 2.5 to 3.5 cc Combat model. Chaos.

CHAOS HAS been developed to overcome the common difficulty of slowing up in manoeuvres. It is very smooth, with no appreciable slackening of speed and can execute a tighter turn than most conventional tailplane models. Original inspiration for the separated, all-moving elevator design must be credited to Klaus Seeger's Zack-Zack, the 1959 European Combat Champion which was drawn in December 1959 Aeromodeller. In 1960-1 Ray Meekins of Kenton, followed by M Morris, of the same club, tried this type and this inspired Peter Freebrey to build a couple of similar models for the '61 Northern Heights and Ashford Rallies. Subsequent developments elsewhere by Riley Wooten in the USA with his Voodoo (oz3693) have in turn added weight to the argument for this type against the conventional style.

The importance of weight cannot be stressed too much. For this model, one should aim at an all up weight of 17 to 18 ounces for competition work. This will give a wing loading of about 6 to 6-1/2 oz/100 sq in. Whereas the normally accepted flying wing has wing loading figures of about 8 oz/100 sq in. Compared with a conventional tailplane model Chaos can still out-manoeuvre with the added advantage of an elevator that can be quickly and easily replaced during a heat.

The tank is constructed from a standard Coleman's Mustard tin costing approximately 6d. All seams are double folded and should be soldered as an extra precaution against leaks.

Start by constructing the leading edge from four laminations of 1/4 x 3/4 x 36 in, and one backing piece 3/32 x 1 x 36 in. When the lamination is dry, notch the backing piece at the rib spacings shown to the full depth of the 3/32 sheet, this will ensure correct line-up and removes all need for a full-size drawing! Then carefully carve and sand LE to section.

Thoroughly cement all ribs to the LE making sure these are square. When dry, pin bottom sheeting of the trailing edge to a flat board, marking off positions of ribs. Apply cement and attach ribs, supporting them and LE to ensure a good contact.

Carve the engine bearers and hardwood spacer to shape. It is important that the spacer must be a good fit to the LE, as this ensures a very strong fuselage. Now attach TE top sheeting. Unpin from the board and fit the balsa engine bearer spacer..."

Plan and article extracted from post on HPA by ilgk48 of Aeromodeller magazine, see

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Chaos (oz11689) by Peter Freebrey 1963 - model pic

  • (oz11689)
    by Peter Freebrey
    from Aeromodeller
    June 1963 
    36in span
    IC C/L
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 25/10/2019
    Filesize: 329KB
    Format: • PDFbitmap
    Credit*: ilgk48, Pilgrim
    Downloads: 413

Chaos (oz11689) by Peter Freebrey 1963 - pic 003.jpg
Chaos (oz11689) by Peter Freebrey 1963 - pic 004.jpg

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