Curtiss F9C Sparrowhawk (oz1565)


Curtiss F9C Sparrowhawk (oz1565) by David Brazelton 1957 - plan thumbnail

About this Plan

Curtiss F9C Sparrowhawk. Scale control line model. Dirigible-borne singler seat biplane fighter. For .09 motors.

This plan was printed in Flying Models Decade of Designs (1), published 1960.

Update 18/05/2021: Added complete article, thanks to theshadow.

Quote: "A Control-line model of a dirigible-borne single-place fighter. Curtiss F9C Sparrowhawk, by Capt David H Brazelton.

For those who like historical aircraft, here is a model of a little airplane that performed great deeds. It is a shame that its exploits are so little remembered because they were the basis of many present-day experiments in launching and retrieving aircraft from an airborne platform. The 'Sparrowhawk' was standard equipment of both the dirigible 'Macon' and 'Akron.' This model is patterned after the aircraft carried aboard the Macon. The Akron model differed in coloration and included full wheel-pants and aircraft-carrier hook. Both aircraft were each armed with one .30 calibre Browning machine gun.

So, if you have an .09 setting around and want to build a model that looks good on the shelf, and in the air, get your knife and some balsa and let's go!

TAIL: Elevator and rudder are cut from 1/8 balsa and sanded to streamline shape. Cut the rudder loose from the vertical stabilizer along the heavy line and cement them back together with the rudder offset to the right, as shown in top view. Bend the 1/16 music wire elevator interconnect-wire to shape and solder the control horn as shown. Cut the elevators loose and slit the leading edge to insert the interconnect-wire flush. Cement the interconnect wire in place and cover the leading edge with silk.

Hinge the elevator to the stabilizer using your favorite hinging method. We prefer alternating cloth strips. Bend a 1/16 wire pushrod, about 6 in long, to fit through the horn and hold it in place with a small washer and solder. Sweat a 1 in piece of 1/16 id brass tubing half way on to the end of the pushrod, so that you have about 1/2 in of tube to accept the other end of the pushrod.

WINGS: Lay out the leading and trailing edge and wing tips of the upper wing. When the cement has dried, crack the leading and trailing edge just outboard of the 5th rib from the tip. Lay the 1/8 x 1/4 in main spar in place and prop up the tip so that it comes flush with the top surface of the spar. Place the 1/8 square rear spar in place and crack it at the same place as the leading trailing edge, so that the outboard edge can be kept flush with the bottom surface of the edges. Cement the 1/32 x 1/4 strip to the trailing edge of the rear spar as shown..."

Supplementary file notes



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Curtiss F9C Sparrowhawk (oz1565) by David Brazelton 1957 - model pic


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