Guru (oz4045)

About this Plan

Guru. Simple free flight power sport model.

Quote: "A 40 inch span free flight sportster for .75 - 1.5 cc engines. Guru, by WI Barrett.

GURU is an attempt to produce a cheap, robust free-flighter, capable of taking a variety of small engines, and having a slow, stable flight pattern. With the recent increases in cost of modelling materials, a major aim was to make the most economical use of balsa, without sacrificing ruggedness.

Construction is simple, as is the trimming and flying of this delightful little sportster, and it would thus form an ideal introduction to this side of the hobby for the beginner or younger modeller. Guru is by no means a contest model, but is well suited to those tired old engines left lying in a drawer at home - why not blow the dust off one of them and put it to some good use?

The fuselage is a simple all-sheet structure built around the engine bearer assembly. Cut the bearers to length and drill the engine mounting holes, if using a beam mounted engine. Cut out formers F1 and 2 (F1, 1A and 2 for radial mounted engines) and glue to the bearers using P.VA glue. Bend the 14 swg undercarriage to shape, then bind and cement to the bearers. Cut the fuselage sides from 3/32 hard sheet, slot for the U/C legs, then slide them over the legs, glueing them securely to the assembly. When dry bring the fuselage ends together and add the remaining formers (noting grain direction) checking the fuselage for correct alignment.

Glue the fin in position, followed by the wing and tail mounts, before adding the top and bottom sheeting. Note that the grain on the bottom sheeting runs across the fuselage.

The wing is built as four separate panels, which are then joined together with the appropriate dihedral angles. Build the port inner panel first by cutting the leading and trailing edges to length and pinning over the plan..."

Supplementary file notes

Article text, 1 page with pics.

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