Fokker D7 (oz4840)

About this Plan

Fokker DVII. Control line scale model.

Quote: "I scaled the Fokker D-7 at a 37 inch wingspan which is referenced in a plan index I use. This happily matches the 1/4 inch square timbers in the plan! I did not have the text, only the two page magazine plan. Perhaps some one else has the text copy."

Direct submission to Outerzone.

Update 17/8/2022: Added article, thanks to Pit.

Quote: "The Fokker D-7, by Dick Enos and Shorty Wright.

We decided to build the Fokkers after seeing Joseph Nieto’s drawings in the 1951 August and September issues of MAN, using a scale of 1-1/4 in to the foot. The only prefabricated parts are the compasses, engines and propellers. Both models are covered with silk with all lettering and details hand painted. The wingspan is 37-1/4 in. Both were successfully flown with an Atwood Champ .60 engine.

The fuselage is built up with 1/4 in sq medium hard balsa. The forward section of the fuselage is laminated, a core of 1/8 medium sheet balsa and 1/16 sheet plywood sides. This forms the front curve to the bottom of the fuselage where the lower wing recesses, then tapers along the lower longeron. The lamination is made before this section is cut. By this construction we found scale lines could be followed with maximum strength needed in this area. When both laminations are completed, the upper and lower longerons are spliced into position, cemented and clamped until dry. These sections are placed over the drawings and both fuselage sides then built.

When the fuselage sides are built, locate the motor mounts inside to suit the engine to be used. The rear sections of the fuselage sides are brought together, cemented and clamped and the remaining cross braces put in. Locate and secure No.1 and 2 bulkheads. The No.2 bulkhead locates the gas tank and the front landing gear strut. No.3 bulkhead is then made and cemented into position. This bulkhead locates the rear landing gear struts and the bellcrank foundation. The platform is made of 3/32 plywood. The bellcrank is now located and the elevator control wires installed according to the drawings.

The stabilizer is built from the drawings and cemented securely to the fuselage. It will be necessary to cut away a small section of the upper rear corner of fuselage for elevator control horn travel. The elevator is then built with the elevator horn and the scale horns attached before it is hinged to the stabilizer. The rudder fin is built and cemented securely to the stabilizer. The rudder post runs down the rear section of the fuselage. Notch the post wherever necessary for elevator control horn clearance. Build the rudder and attach rudder horns, then hinge to the fin the same as elevator. Fabric hinges are used.

Now it is necessary to build the cockpit and all cockpit details so that all control cables can be connected before covering.

The floorboard is made of 1/16 plywood. The control stick is of dowling and sanded to shape. The pivot section of the control stick is made of brass tubing. The tubing on the control stick has an elongated hole drilled to give forward and backward motion. The pivot bar passes through this hole by a small hole drilled horizontally through both and a pin secured through it. This pivot bar, made of 1/16 brass tubing, is anchored at each end with short pieces of tubing soldered to brass plates and anchored to the floorboard. This acts as the bearings. At the front end of the pivot bar the rudder pedals are located.

An upright shaft is soldered to a short piece of brass tubing through which the pivot bar passes. This tubing also has a plate soldered to it and anchored to the floorboard. The rudder bar is built to swivel on this shaft and is made of 1/16 steel wire. Two loops are formed for the toe rest and are soldered on the rudder bar. A small eyelet is mounted on the inside of each loop. The rudder control cables pass through these and are secured by wrapping and soldering..."

Supplementary file notes

Article.

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