REP Type B (oz10936)

 

REP Type B - plan thumbnail image

About this Plan

REP Type B. Scale model for either rubber or CO2 power.

Quote: "Still another fine Free Flight Scale from a perennial Nats Scale winner - this one an excellent pre-WWI plane that was designed initially for Indoor, then scaled up for Outdoor contest work using the Brown CO2 engine for power - whichever is your thing, pick one as it shall produce fun and wins for you. REP Scale Model, by Tom Stark.

Little has been written about the early REP airplanes, which is unfortunate since they had a profound influence on the technical history of aviation. Robert Esnault Pelterie was the builder of the REP airplanes which bear his initials. Pelterie, a Frenchman of some wealth, built his first glider, copied after a Wright brothers design, in 1904 at the age of 25. He fashioned a wind tunnel of sorts on the hood of his car, became convinced that the drag of the numerous wires inherent in biplanes were inefficient and hence embarked on the design of monoplanes.

The first REP's were curious looking airplanes with tandem wheels on the main landing gear and bicycle wheels on the wing tips for balance. However, they were quite advanced for their day, having metal structure, oleo strut landing gear, steerable tail wheels, semi-cantilever monoplane wings, and radial engines of Pelterie's own design.

Pelterie flew these airplanes from 1907 through 1910. In 1910 he came out with a new series of airplanes that were more conventional and more suc-cessful. The REP Type B was among these. It retained the metal structure and monoplane configuration, but it adopted a more conventional landing gear and used more wire bracing on the wings. The engine was an REP five cylinder radial or, more correctly, half radial of 50 - 60 horse power. It had a top speed of around 55 mph. Like all REP airplanes it was noted for excellent engineering, workmanship, and reliability. Also, like most REP's, it was painted solid red.

The aerodynamic shape of the REP Type B lends itself perfectly to a Free Flight model. No deviations were re-quired in tail area and dihedral. The wing angle of incidence was decreased in the model since the real airplane's angle of incidence was excessive. Originally, the model was designed for Indoor Scale. A simple, one half size model was built first to see if it was stable. It proved very stable and the full size model duplicates the excellent stability. As a rubber-powered Indoor Scale, it has one shortcoming: tail heaviness, It does fly well when balanced as shown on the plans but the ballast required decreases its endurance. Under the new rules, this may not be a great handicap since Endurance has been de-emphasized in favor of Scale points..."

REP Type B, MAN, September 1973

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

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REP Type B - completed model photo

Datafile:

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Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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