Peregrine (oz1874)


Peregrine (oz1874) by Dick Twomey 1954 - plan thumbnail

About this Plan

Peregrine. Ree flight gas cabin model, for small diesels.

Quote: "A Concours d'Elegance class model for the point-fives.

Too much dihedral spoils many semi-scale models, but one way to overcome the need for it is to install a pendulum rudder. If you have never tried one, don't worry - nor had Dick Twomey till he built the original 'Peregrine' and now he is a complete convert, with ideas of fitting pendulums to all types of models ! If you don't fancy putting one in, build the model with increased dihedral (2-1/2 in under each tip) by lengthening the wing struts. You have, too, the alternatives of a tricycle gear or a conventional undercarriage, with or without spats.

Though not a beginner's model, the trim lines, all-sheeted fuselage, and concealed wing fixing, etc make this an excellent choice for builders who prefer a realistic model lending itself to a high finish or those looking for a rugged, all-weather sports flier.

Construction. The basic fuselage sides are first joined at tail and F7, 8, 9 and 10 inserted. Assemble the bearers and F1-6, placing F3 and 4 tight together but not cementing them. Carve and hollow nose-block and plank nose with 1/16 in strips, after checking the engine for fit. Shape the undercarriage and install the nosewheel (if used). This is hinged as shown, between the bearers, F7, and block then sprung by means of rubber bands extending to F4.

Add remainder of formers and spacers and construct the centre-section, checking carefully that F16 is set on F7, 8 and 9 at the correct incidence. Fit wing locating dowels, and box for strut.

Build the tailplane before planking the fuselage top and note that the 1/32 in sheeting on top of the centre-section extends 1/8 in over the ribs to facilitate covering. Fit small tongues to lock the tail in positive alignment. F15 can be cemented to the tailplane LE and the fuselage planking extended right over to the TE after cementing the fin onto tailplane.

The rudder is lightened and must move freely; the partial aerodynamic balance plus the lightweight means that very little pendulum weight is required. Full movement is 3/16 in each side of neutral..."

Update 06/02/2013: replaced this plan with a much clearer version, thanks to raglafart.

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