Bucker Jungmeister (oz2063)

About this Plan

Bucker Jungmeister. Scale model for 2-3 channel radio control and .049-.09 power, Cox .049 Tee Dee is shown. Scale is 1/8.

Quote: "Schoolyard scale continues to grow in popularity as quality radio systems shrink in size and price. These .02- to .10-powered compact models will fit, assembled, into the trunk of almost any car, and a pint of fuel will last for months. Another attraction of the small model is that it offers a chance to build any one of those favorite scale subjects each of us has rather quickly, without investing the time and money required for the larger competition-type scale models. Although some special competitive events are occasionally offered for the schoolyard scale-sized models, these compacts are principally in the domain of the weekend sport flier, the guy who doesn't give a hang about competition - low-pressure fun flying is what he's after. It is in this spirit that the little Jungmeister is offered.

As a modeling subject the Bucker Jungmeister is hard to fault. It has proven to be an exceptional scale configuration for everything from free flight rubber up through quarter-scale R/C. The particular version selected in this case is the prototype Bu133A powered by an inline 6-cylinder Hirth engine. The model is built to a scale of 1-1/2 in = 1 foot, which gives a span of about 32-1/2 in and a length of about 30 in. The model is close to scale in all exterior respects; basic structural members, number of ribs, airfoil, dihedral, cowl panels, etc., are all reproduced on the model.

The model is intended for use with two channels controlling either rudder and elevator, or ailerons and elevator, and powered with an .049 to .09 glow engine or a 1.0cc diesel. Three servos to provide rudder, aileron, and elevator could also be used along with the larger engines to provide truly out-standing aerobatic performance, although weight would have to be watched closely. Although I personally haven't tried it. I'm sure the little Jungmeister could also be adapted for pulse rudder or even free flight if the weight was kept low enough.

The Jungmeister is not the ideal choice for a first scale R/C project, since some building skill is required to build a light and straight biplane airframe. Also, the model, like its full-scale counterpart, has more performance and maneuverability than a basic trainer requires.

The Jungmeister has been a popular and effective aerobatic performer world-wide since the mid-1930's. In 1933 when Carl Wicker returned to his native Germany, he set up a small aircraft manufacturing firm near Berlin called Bucker Flugzeugban. Prior to this time Bucker had been the managing director of Svenska Aero AB in Sweden. The first aircraft to come from the new Bucker firm was a remarkably efficient sport and aerobatic training biplane and was designated the Bii131A Jungmann (young man). It was a two-place biplane with gracefully swept wings and a long slender fuselage and was powered with an 80 hp inverted, 4-cylinder Hirth HM6OR. The Jungmann's acceptance was immediate and enthusiastic; quantity production was quickly started with most deliveries going to the German 'civil' flying schools which were then training pilots for the still clandestine Luftwaffe.

In 1935 a new single-place biplane, the Bu133A Jungmeister (young champion) was introduced. It was slightly smaller though very similar to the Jungmann, and in fact many components were interchangeable. The first prototype Bu133A bore the civil registration D-EVEO and was powered with a 135 hp inverted 6-cylinder Hirth HB6. Its incredible aerobatic capabilities quickly brought the Jungmeister widespread popularity. Only one Jungmeister with an inverted engine was built in Germany, as all subsequent production models were fitted with the 150/160 hp Siemens Bramo Sh 14A seven-cylinder radial engine. These radial versions were designated Bu133C.

Like the Jungmann, the Jungmeister was stressed for unrestricted aerobatic flight and, because of its snappy performance and remarkable rate of roll, it quickly became a favorite of many European, and later American, acrobatic virtuosos. Early in 1936 the by-then official Luftwaffe adopted the Bu131B as its official standard primary trainer, and the Bu133C as its standard advanced aerobatic trainer. Production in Germany was increased substantially..."

Update 08/10/2012: Have replaced this plan with a clearer version thanks to theshadow.

Update 16/06/2017: As well as being produced by Flyline Models, this design was also published in MAN May 1979. We've added this article, thanks to RFJ.

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