Chunky (oz2211)

About this Plan

Chunky. Free flight power model for .049cc motors.

Quote: "Cheap to build! Easy to fly! Perfect for the novice! An Aeromodeller staff design for .5 to .8 cc.

THE NEW .049 cu. in. engines are rapidly becoming popular with newcomers to our hobby, and many such novices have requested that we provide them with a special design to suit the new power units.

We realise that for real contest performance, any .049 powered model should weigh around 4-5 ounces, have light wings, and be trimmed for a near vertical climb. Let us state right at the beginning that Chunky is not of such a breed. Here we have a 'toughie', easy to build very easy to fly, and still having good performance. We checked the prototype with the weakest of the .049's (no names - no pack drill!) and at a total weight of 8 ounces. By selecting such extremes we know that Chunky will fly well. The careful modeller can whittle the weight down to 6 oz. through use of medium/soft balsa and a 'hot' motor will give best performances.

One must first study the plan thoroughly, with reference to these instructions to completely understand the method and sequence of construction. The model has been designed to be built on a standard schoolboy budget, so if you want to keep cost to a minimum follow the parts layout given on the plan.

Fuselage sides F1, F2, are traced from the drawing using a straight steel edge and soft pencil. The tracing is turned over and placed on the 3/32 in sheet and with a hard pencil this time, the outlines are followed, reproducing the fuselage sides on the wood. F1 and F2 are now cut out, again using the straight edge. Engine bearers should be cut to length from 5/16 x 1/4 in hardwood.

The right hand fuselage side is pinned over the plan and the bearers double cemented over this in their angled down position. Two layers of 1/8 in sheet fill in the space between bearers, the outline for these being traced from the plan. Note that the wood grain here must be vertical. Once cemented the whole should be held in place with pins until quite dry..."

Update 30/07/2016: article pages, text & pics added, thanks to RFJ.

Supplementary file notes

Article pages, text & pics.

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