About this Plan
Hegi Frechdax. Radio control sport model.
Quote: "Hi Steve and Mary. That's my Frechdax - Hegi's first model airplane that I ever saw RC flying. Here he flies on a meeting of S.A.M, a honour Commerce for vintage models. I fly him with 1.5 cc engine, and have power over. A particularly good airplane. Greets,"
Direct submission to Outerzone.
Update 6/9/2023: Added kit review (of later kit by Hobby House, for electric power with Speed 400 motor) from from Quiet Flyer, December 2001, thanks to RFJ.
Quote: "Review by Hans Jurgen Fischer. Sport Electric Frechdax, from Hobby House.
Electric-powered models now come in many sizes, shapes, and styles. There are many types available from both small and large manufacturers. This is especially so in my country of Germany, where internal combustion engine noise pollution has been a problem for years. The continued development of electric power in Europe has resulted in e-models with the performance of glow/gas. Further, these new power systems are priced about the same as an internal combustion engine.
In Design: Andreas Peters of the Modellbau-Centrum in Herten, Germany, had an idea. He wanted to design and build a small electric-powered model. He wanted a model for the 'normal' modeler, of complete wooden construction, with a nice appearance, and he wanted it to be an airplane that could be built at an affordable price.
As a long-time modeler and glider pilot, he remembered the Hegi Company's Frechdax. For this firm, which closed about 30 years ago, the famous design engineer W Sargel developed the Frechdax for a combustion engine. This very successful model was available as a fast-to-construct kit with the Taifun diesel engine. It was a favorite with many model pilots.
After many inquiries, Mr Peters of Hobby House decided to revive this model with the same appearance; the name 'Frechdax' was used again. He adhered to the old shapes and measurements, but brought the model's construction and electric-powered motor up to today's standards.
The result is a model that is not just a fundamental kit for younger or older electric-power pilots. It is also very appealing to model pilots of all skill levels who enjoy the fun of flying vintage, classic-looking models.
Construction: The model was redesigned using computer-aided design (CAD), and the wood was cut by laser. Even with laser-cut parts, the Frechdax requires about thirty hours of building time.
The construction of this model is not very difficult. Under the guidance of an experienced model builder, even a beginner can build it. However, attention to detail is necessary when building the cowling, the arched fuselage nose, and the balsa block. I recommend moistening the planking with water before bending and gluing. Also, the front frame of balsa must be sanded to its proper shape. It might even be wise to build a cowl out of ABS plastic; the shape is somewhat difficult to mold, however. Once the front of the airplane is built, though, only a few hours are required to build the fuselage.
The steel wires for the three-legged undercarriage are easily built. The landing gear rigs with the help of metal-clamp screws. In case of rough landings, only the screws get loose, and they may be fixed quite easily.
Like the fuselage, parts of the wing are made out of laser-cut balsa wood parts. The ribs attach to the solid balsa main spar and the trailing edge. The leading edge is round, which makes sanding pretty much unnecessary. At the root area, the ribs get a sheet of balsa, which is typical of this type of airplane. The wing attaches to the fuselage by means of a plywood hook at the leading edge and a plastic screw at the trailing edge.
The tail feathers are laser-cut, too. They only require a bit of sanding to finish.
I recommend you use OracoverTM to cover the Frechdax. It covers well and offers color designs that will enhance any model.
The electric motor mounts to the fuselage front with a few screws. The fuselage has more than enough space inside to fit the battery pack to the hard balsa floor. The 7/8-cell speed controller can mount on top of the battery, or just behind the motor, with Velcro tape. The receiver and the servos for the rudder and elevator are installed in a plywood servo tray, slightly in front of the wing's trailing edge. Standard servos will fit in this model, too, so the cost can be kept to a minimum.
To set the airplane's center of gravity (CG), just move the battery pack forward or aft until it balances. The exact CG is shown on the plans... "
Supplementary file notes
Parts list, thanks to Julien.
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User commentsHi Mary and Steve, this is a wonderful little old bird. It looks like a Piper Tripacer. The Hegi Frechdax is from 1964, and by the way Frechdax is the German word for Cheeky Monkey... Cheers
Pascal - 24/12/2015
Hi Steve and Mary; here my latest addition. The 100% original kit of the Frechdax, received from a pioneer in the modeling world [pic 007]. I am very happy with this kit. Now keep it nice for my grandchild. Thanks for Outerzone. Kind regards,
JulienVermeire - 13/04/2020
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