Cricket (oz12984)

 

Cricket (oz12984) by Jack Headley from Model Builder 1979 - plan thumbnail

About this Plan

Cricket. Simple free flight sport model, for 1/2A engines.

Uses the Ace Mini Foam Wing. Wingspan 35 in, wing area 192 sq in.

Quote: "A good-looking 1/2A sport model by a well-known designer. Uses Ace foam wings and a minimum of your time. Cricket, by Jack Headley.

The Cricket represents a very simple approach to a sport model, and requires little expense for the building materials and little time to construct, both of these items being important factors these days. The power required for the model is provided by a Cox .049 or its equivalent, and the radio is an Ace single-channel pulse system. As an alternate, Bill N suggested that one of the smaller Cannon radios could also be used, and this would give an additional channel, as well as being proportional control. Although I haven't tried this out myself, it sounds very practical, and further along in this discussion I've included a short section on my ideas of converting the Cricket into a two-channel version.

In keeping with the simple features of the model, I'll keep the construction notes on the same simple level and not bore you with details of every step in the construction (there aren't many anyway!). There is also a quite detailed set of construction photos to go along with these notes, so building the Cricket should be virtually trouble-free.

WING: The wing used is the Ace Mini Foam Wing, the one with the constant chord (No.13L192). The wing area is 192 square inches, hence the numbers you can see on the model photos. The Ace kit, in addition to including the two wing panels, comes with voluminous instructions on how to put it together, so rather than repeat all of these here I'll just let you read the Ace data, and this will tell you all you need to know on assembling the wings.

For the Cricket a total dihedral of 3 inches is required; that is, 1-1/2 inches under each wing tip. The only thing I added to the foam panels was a couple of scraps of 1/16 ply at the trailing edge of the centersection, to prevent the wing bands from cutting into the foam.

FUSELAGE: Construction begins with the profile fuselage, which is cut from a strong piece of 1/4-inch sheet. The profile outline is shown on the plans by the small triangles, and if you use a 4-inch wide sheet of wood the fuselage can be made in a single piece. Otherwise, a 3-inch sheet can be used, with a couple of extra pieces tacked on in the cabin area. Don't bother to round off any corners at this stage, this will all be taken care of later. Make the radio box support and the tailplane support from a strip of 1/2-inch triangular stock, and glue onto the body, together with the tailskid.

LANDING GEAR The landing gear consists of a length of 3/32 wire and a pair of 1-1/2 inch diameter wheels. Bend the wire to the shape shown on the plans, then test fit on the fuselage. If the wire doesn't fit the 1/4-inch sheet tightly, make the gap at the top end of the wire a little smaller. Keep test fitting the assembly until the wire clamps onto the body, but not so tightly as to crush the wood. The top end of the wire loop fits into a small notch cut in the body.

With the wire correctly located, bind the two legs together with soft wire, then solder. A coat of epoxy smeared over the wire and the body will help keep this assembly in place until the fuselage doublers are attached.

RADIO BOX: The radio box, or cabin, is entirely made from 1/8 sheet and consists of a floor, two sides, and four frames. The plans show details of all these pieces. When this item is constructed it can be sanded lightly all over, and then cemented into place on the fuselage.

Make the nose fuselage doublers from 1/4-inch sheet, noting that both a left and right handed piece are needed. Trim and chamfer as shown to fit over the landing gear wire and the triangular support for the radio box. Glue these items into place, then make and attach the nose fairings. This latter item should be sanded to an elliptical cross section before being finally attached. Roughly carve to shape, then glue the block balsa pieces which represent the cabin windscreen in place. The block fairings at the aft end of the cabin can also be made..."

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Cricket (oz12984) by Jack Headley from Model Builder 1979 - model pic

Datafile:
  • (oz12984)
    Cricket
    by Jack Headley
    from Model Builder
    September 1979 
    35in span
    IC F/F
    all formers complete :)
  • Submitted: 20/04/2021
    Filesize: 488KB
    Format: • PDFbitmap
    Credit*: MB2020

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Scaling

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