Lamson Air Tractor (oz1182)

About this Plan

Lamson Air Tractor. Scale control line gas model.

Quote: "Certainly one of the most unusual airplanes to make its bow in recent years, the Central Lamson Corporation's Air Tractor was designed not for looks, but to be completely functional. Among many money-saving ideas and production shortcuts are similar panels in each of the four wings and same size and shape elevators and rudder. The back of the fuselage has been left open to facilitate cleaning after spray job is completed. Note good pilot visibility.

LAMSON AIR TRACTOR. Here's an exciting pro feet for the control line flying scale air-modeler! Craft can be built with stunt airfoil if desired.

Our 'Duster' model is a copy of Central-Lamson's first crop duster. A unique innovation on the prototype is the instrument arrangement outboard of the cockpit, on the gull trailing edges. Instrumentation is so arranged for the purposes of safety. At all times they are in the pilot's line of sight. This is most important since crop dusting is mostly low-level flying.

The bipe arrangement lends itself nicely to control-line flying. But although primarily a sport flyer, the model can be made quite maneuverable. Substitute a stunt airfoil for the one shown, and all you die-hard stunt fans will have an amazing scale stunter.

At first, the nose moment appears somewhat short; don't let this bother you. Careful balancing will erase all doubts. Check carefully the balance point given in the drawings - more about this later.

Building can commence with most any structure, and since we enjoy tackling a tough section let's start with the wings. Both are built in a similiar matter, with a little more care required on the gull arrangement of the upper wing. Ruggedness is the keynote as can be seen from the leading and trailing edge wood selections. Using the recommended balsa, shape all ribs from W-1 through W-6. Check the drawing for proper rib thickness. The entire leading edges are first assem-bled over the front view, using the 1/4 sheet balsa reinforce-ment and placing as shown..."

Supplementary file notes

Article pages, text and pics, thanks to Pit.

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