Curtiss XF15C-1 (oz16063)

About this Plan

Curtiss XF15C-1. Control line scale model. Wingspan 18 in, for Bantam engine.

Quote: "If you're looking for something a bit out of the ordinary in a Flying-scale job, stop right here. Full-size plans are included. So start building!

When it became apparent that the turbo-jet engine was a challenge to the reciprocating propeller drive, the United States Army and Navy conducted exhaustive tests to determine the relative merits and the combined advantages of both types of power. The Navy tested the Ryan 'Fireball' and was so pleased with the results that Curtiss-Wright obtained an order for three test models of a composite powered craft that was twice as heavy and much more powerful.

This unusual craft was designated XF15C-1. An 18-cylinder Pratt and Whitney R-2800-34W, developing over 2,000 horsepower, spinning a Curtiss electric four-bladed propeller, is in the nose, while a 2,500 pound thrust De-Havilland Allis-Chalmers type HI turbo-jet engine exhausts rearward out of the fuselage just below the tail. The 'T' tail was used to improve stability and eliminate the hazard of the hot jet blast. Top speed is close to 500 miles per hour and it stalls at 100 miles per hour. The craft weighs over eight tons and has a range of 1,200 miles. Many important lessons have been learned from the flight and static tests of this unusual guinea pig.

In model form, the craft is quite fast, yet very stable. Transporting the model presents no problem in view of its small size, and it can be flown in a gym or armory as well as the corner lot. The small wheels have a tendency to catch on grass surfaces, so avoid this'type of terrain as a flying site.

A Bantam engine was used on the prototype model and this is the largest engine we advise as power. Engines of .099 cubic inch displacement (either diesel, glow-plug or regular ignition) will power the model nicely. Glow-plug ignition was used on the model photographed; however, regular ignition units are indicated on the plan for those who prefer to use this type. The model is very easy to construct and is recommended for beginners as well as the experts. Plans have been drawn full size, and should be joined as indicated.

Fuselage: Cement two straight grained balsa blocks together, very lightly, along the horizontal center line. Trace the plan view of the fuselage onto the block and cut accordingly. Repeat the procedure for the side view. Now, while constantly referring to the fuselage sections shown on the plans, carve the block to its proper shape. Make sure you allow for the wing fillet.

When the fuselage has been carved and sanded, it can be pried apart and hollowed as indicated on the plan, after which the hardwood engine mounts are securely cemented to the lower half of the fuselage. If a radially mounted engine is used, the bulkhead should be moved forward and the bearers omitted..."

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Supplementary file notes

Planfile includes article.

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