Pattern Master (oz16970)

About this Plan

Pattern Master. Radio control pattern trainer model. Wingspan 60 in, wing area 720 sq in, for .35 to .49 engines.

Quote: "The Pattern Master: From the outset it should be known that the Pattern Master was not developed to become a World Champion, although its performance is the equal of most Championship designs. The objective is to offer a vehicle which can be very useful, without a great deal of cost or effort, in helping a pattern flyer along the road to that Championship.

It is an INTRODUCTION to pattern flying, it possesses all of the characteristics of a Champion and it is also a very fine Fun Flying machine. Above all else it is not costly to own and operate. It assembles as easily as most trainers and it is SIMPLE and ENJOYABLE to fly. If a pilot has accomplished the cabin type trainers, he can easily transition to the low wing pattern style machines with the Pattern Master; the ability required is very little more. For the accomplished pattern flyer here is a simple, much less costly machine for practice flying.

Aerodynamically, the Pattern Master is very similar to the best pattern designs. It uses the finest NACA airfoils, which are even progressive, to offer the maximum efficiency. The force arrangement comes directly from considerable design experience. It is the aerodynamics of the design which creat the championship type performance. The performance is different in two ways. First the Pattern Master is extremely stable and docile to fly. The control response is positive, yet soft much like a good trainer, it does not jump from one position to another. The stability allows the design to fly itself through maneuvers, it does not require constant attention. Secondly, the Pattern Master is comparatively slow in flight, the flying speed is much closer to a normal sport model than it is the Championship pattern type.

The slower flying speed makes all the pattern learning that much easier to accomplish. The secret to the Pattern Master design is its light weight, high power loading and low wing loading. Power loading is weight versus available power. With the light weight any decent low cost .40 engine is ample power. Such an engine is economical to buy and with its low fuel consumption, it is economical to operate. The Pattern Master uses a wing which has the size and lifting ability of the largest .60 designs. Such a wing does not have to fly fast to accomplish its work if the wing loading is low. That same low wing loading automatically offers the ability to maneuver easily. With ultra-stable airfoils those maneuvers come almost automatically.

The Pattern Master 'Quick Build' feature comes from its structural simplicity. With no fancy lines and multitude of parts, this clean design assembles fast and with considerable utility. Yet, the result is a long lasting most serviceable model. The Pattern Master can be the fun way to becoming a pattern expert!

Choice of Radio: A minimum of 4 control channels is required for the Pattern Master. If a radio is to be acquired and the modeler intends to progress with pattern flying, there would be other considerations. For instance, a sophisticated pattern aircraft uses a retractable landing gear requiring a 5th control channel. Also, a system with dual rate controls can improve the ability to perform the stalled maneuvers such as tail spins and snap rolls. Dual rate is a transmitter function which provides two amounts of control movement, selectable. The least amount of movement is used for normal flying providing smooth easy maneuvering. The greater movement provides the action needed to perform the violent maneuvers.

Light weight is a design factor for the Pattern Master and most other pattern designs. So, the radio should be the lightest available while also providing maximum reliability. The power supplied by the smallest servos is sufficient to fly the Pattern Master, however, the standard size servos are more versatile and will suit the Pattern Master very well.

Whatever type of radio used, the performance of it will be enhanced by the method of installation in the model. Do pay particular attention to the Radio Installation of this manual.

Choice of Engine: The performance of the Pattern Master does not require a maximum power engine, any of the outstanding modern sport or pattern type .40 engines will do fine. However, it should be realized that if there is a choice, having addiional power available can never do any harm. What is of most importance in pattern flying is reliability.

In pattern flying the emphasis is on perfecting your performance of the flight. To do this, it is important to duplicate the exact conditions from flight to flight, concentration is on the flying, any distraction caused by the airplane, radio or the engine can be a detriment to progress. Also, some of the pattern maneuvers require a very low idle speed for the engine. For this reasoning it is an advantage to choose an engine with a reputation for ease of adjustment and reliability over a long time period. The idle capability is of most importance of course. Fortunately for today's modelers most of the major engine manufacturers offer a .40 size engine with the desired characteristics, leaving the choice to the modelers..."

Direct submission to Outerzone.

Quote: "Greetings, for publication and sharing, here is the Midwest Pattern Master by Hal deBolt, circa 1980."

Supplementary file notes

Centerfold drawing.
Instructions.
Isometric drawing.

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