Mini Bunt (oz4630)

About this Plan

Mini Bunt. Control line model. A 23-3/4in wingspan CL 1/2A combat model for 1 to 1.5cc engines.

Quote: "The 'Mini-Bunt' is not an original as some may assume. It is in fact a miniature version of the Flingel Bunt (oz2580) published in January 1965 Aero Modeller. Though this model has never been entered for competitions (few 1/2 A combat events are included in the contest calendar) it is felt it would do well if put to the test.

Its main attribute lies in a combination of maneouvrability, speed and strength. The original model has never, during it long life been damaged except for a slight tear in the tissue covering. This was rendered less likely to happen on the second model by introducing an alternative covering of nylon.

The basic construction is simple but it helps if a strict schedule is followed. Use of the slower setting PVA white glue throughout the construction is strongly recommended.

Cut the 1/4 in sheet fuselage and glue the 1/4 x 1/2 in bearers in position along with the 1/4 in sq hardwood spacer. Then cut the 1/4 x 1/8 spars, 1/2 in sq leading edge and 1 x 1/4 trailing edge to length over the plan.

The ribs are cut from 1/16 sheet and glued to the lower wing spar which is pinned over the plan, taking care to observe that the rib spacing is not the same for both wing panels. Glue the second wing spar in position and also the leading edges and trailing edges. Cut and glue the 1/16 ply doublers to the main fuselage of the model.

Now make up the bellcrank assembly and fit in place, this should be well glued. Solder 16 swg push rod and 20 swg leadouts to the bellcrank. Provision should now be made for fitting the tank but it should be remembered that the fuselage is passed along the wing and over it before being fixed in position. Cover centre section with 1/16 sheet and sand smooth before passing wing through hole in fuselage, gluing well into position. Cut tips from 1/8 sheet, and glue onto wings, pass tubes over the leadouts sewing and cementing well into position on wing tips. These tubes can be made from old fuel can spouts or copper tube.

Cut tail plane from 1/8 sheet and sew together. Glue tail plane to fuselage and bend push rod to fit horn which is now glued to the elvator. Cut tip and tail plane gussets from 1/8 sheet and cement into position. Add 1/16 plywood fin and drill engine bearer holes, the motor backplate fitting snugly against hardwood bearer spacer. The joints between the wing and fuselage should be covered with cloth or gauze and well cemented. Sand the model smooth and give airframe one or two coats of sanding sealer, sand lightly again when dry.

The model is best covered with nylon but heavy weight tissue can be used if so desired. Wings are best covered with coloured nylon or tissue rather than coloured dope as this adds unnecessary weight. The fuselage can be colour doped if so desired. Give wings four coats of clear dope and fuel proof to complete model. When dry, install motor and connect to tank.

A PAW. 1.49 was used in the original to give a very high air speed and ample manoeuvrability."

Quote: "Hi Steve - Here is S. Spencer's Mini Bunt from Aeromodeller magazine issue 03-66."

Update 24/07/2013: Added article, thanks to hogal.

Direct submission to Outerzone.

Supplementary file notes

Article.

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