Grumman Ag Cat (oz6466)

About this Plan

Grumman Ag-Cat. Control line scale model, for Fox 35 power. Scale is 1/12.

Quote: "Grumman's Ag-Cat Proves Perfect Subject For Control Line Scale Builders. By Paul J Palanek.

Wildcat, Hellcat, Panther, Cougar, Tiger and now, the Ag-Cat crop dusting bipe by Grumman Aircraft, Like its predecessors it is a fighter - a fighter of agricultural pests.

From the ground up the Cat is designed for crop spraying or dusting. It incorporates a number of unusual features. For one thing, the plane will take half a dozen different engines in the 200 to the 450 hp range. The choice is left to the buyer. Upper and lower wing panels are interchangeable along with the ailerons. Rigging is simple, no internal and a minimum of external wiring.

Both the air speed indicator and engine tachometer are mounted on a separate panel forward or the cockpit in the pilot's 'flying line of vision'. During dusting or spraying operations pilots have little time to look inside the cockpit.

Specifications for the airplane are overall length of 24' ft 8 in; 35 ft 8 in span: gross weight 3600 lbs; empty weight 2180 lbs; 29 cu ft (217 gals) hopper volume. Hopper load is 1000 lbs. The Ag-Cat has been designed to make a continuous 1.5G turn at dusting speed and at maximum gross weight.

Our model is designed around a 1 inch scale bringing the upper panel to a 36 in full span. The .29 power plant is housed behind a dummy 7 cylinder radial engine; with a short nose moment all movements of control are most responsive. The model floats in on a mono-strut landing gear and a spring leaf swivel tail wheel.

Construction could begin with almost any part of the model. However, we prefer to start with the fuselage since all members fasten to it one way or another. The sides are 1/2 in sheet balsa broken and shaped as indicated. All formers aft of the firewall are 1/4 sheet balsa. The firewall is 3/16 plywood. A 1/4 thick disk of sheet balsa forms the nose of your Ag-Cat. The engine is mounted prone; be certain the 3/8 x 5/8 hardwood motor bearers are secured to the fuselage accordingly.

Fasten the 3 inch bellcrank to the plywood platform as indicated. Secure a 1/16 dia wire pushrod to the crank with the tail end extending beyond the fuselage. The deck and nose sections are built up from 1/4 in sheet balsa laminations, shaped as in the cross sections..."

Direct submission to Outerzone.

Supplementary file notes

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