Thermal Charger (oz4713)

About this Plan

GM Thermal Charger. Radio control electric powered glider. Wingspan 60in. Wing area 545 sq in. For Leisure .05 electric motor.

Quote: "If what you are looking for in an electric sailplane is good looks, easy to build, fun to fly, and great performance, Thermal Charger is the one for you."

Update 24/8/2022: Added instructions, thanks to windlaufen.

Quote: "Introduction: Thank you for choosing the Thermal Charger as your next RC building project. We at GM Precision Products realize the investment of time and money an RC project represents and have worked very hard to produce the finest line of premium quality balsa kits available.

We believe that the construction of a radio controlled aircraft should be an enjoyable part of the modeling experience, and to this end, we strive to eliminate the frustra-tions of building by providing you with only the highest quality materials, hardware packages, plans, and instructions.

The Thermal Charger has been designed and engineered to provide you with an electric powered sailplane that is not only beautiful and unique in appearance, but one that has truly outstanding performance.

The Thermal Charger has a look all of its own, and because it was designed right from the beginning to be an electric powered sailplane, many of the problems associated with electric powered aircraft simply do not exist with the Thermal Charger.

For example, instead of placing the electric motor in the front as with most electric powered sailplanes, the motor in the Thermal Charger is placed behind the wing, thereby protecting it and making it almost impossible to bend the propeller shaft.

Also, due to the motor location and the unique design of the fuselage, there is absolutely no problem placing the battery pack up front where air can flow through the front of the fuselage, over the batteries, and on out through the electric motor, thereby cooling the batteries and motor and eliminating one of the major drawbacks in electric powered aircraft.

In helping to ensure your success and complete enjoy-ment in flying an electric powered sailplane, a leisure .05 electric motor, complete with switch harness and plugs, has been provided as part of this kit.

The motor batteries recommended for this combination are seven 800 milliamp cells, which should provide approx-imately four minutes of motor-running time with 6 x 2 1/2 to 6 x 3 propellers. Large or smaller battery packs, of course, can be used, but through our testing and development, we found this battery pack combination to give optimum results.

To assist you in your construction, we have called out the types of cement that we used in building our prototype of the Thermal Charger. Other glues can be used, of course, but keep in mind that strength and weight are both extremely important in all model aircraft construction.

Fuselage:

1. Begin construction ofthe Thermal Charger by placing the plans on a cork board or piece of celotex large enough to accommodate all of the struaure during building. With the plans laid out, place a pieced of waxed paper over the top of the fuselage structure and pin it into position. Next, locate the fuselage sides and the bundle of balsa that will be used for stringers and braces. Also at this time, locate the package containing the bulkheads and formers used in construction of the fuselage.

2. With the main parts of the fuselage now located and identified, pin the 1/16 balsa top and bottom fuselage sides to the plans and join them together using thin CA cement.

3. Next, add the 1/8 x 1/4 and 1/8 square balsa stringers that run the full length of the fuselage, using the plans as a guide. At the same time, add the 1/8 square vertical braces in the positions indicated an the plan. Be sure to leave a space for the F1 and F2 formers when installing the top pieces of 1/8 x 1/4 balsa.

4. Once the balsa stringers have been glued in place, the 1/16 vertical grain balsa can be added to the upper portion of the fuselage between F1 and F-2. Be careful to get a good fit when cutting these pieces to size, and glue them in place using thin CA cement..."

Supplementary file notes

Instructions, 27 pages.

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