Jungster II (oz9575)

About this Plan

Jungster II. Stand-off scale radio control parasol model, for .19 to .29 power.

Quote: "The Jungster II is another homebuilt design which is part of the ever growing EAA organization. It is the second of two designs by Rim Kaminskas an aero systems engineer of Los Angeles. In 1949 Mr Kaminskas migrated to the United States from Lithuania. He had flown the highly maneuverable Bucker Jungmeister in Europe, and was unable to buy one in the US. It was not available to US citizens, you couldn't buy a Jungmeister for love or even good folding money. However Rim as a trained aeronautical engineer sat down at his drawing board and designed his own midget sport bipe. This he called the Jungster I, it was an 4/5 scaled down Jungmeister, it closely resembles its pappy the BU-133.

In 1962 Rim started his second version of the Bucker type design. This time he selected a swept tapered wing parasol. He called his new jewel the Jungster II and powered it with a 180 horse Lycoming. It is of all wood and is built literally like a model airplane, with plywood and fabric covering. Wingspan is 21 feet and it has 15 degrees of sweepback in the wing. It weighs in at 740 pounds and cruises at 160 mph. Climb is a fantastic 3500 feet per minute. It is stressed for aerobatics.

The model was designed from drawings and other information I gathered from K&S Aircraft Co of Calgary, Alberta, Canada who sells drawings to construct the full size plane. The model falls in the Stand-Off Scale category and flew right off the board. I have flown it with a .19, a .25 and would say a .35 would be the limit. It has shown no bad habits and is being flown on three channels using rudder, elevators and motor control. Ailerons are shown on the plans, however they are not needed for general sport flying. The theory of a swept wing is roughly five degrees of sweepback gives the same effect as one degree of dihedral. So with the 15 degree sweepback in this wing this is equal to three degrees of di-hedral. The model is not too difficult to construct, however one must be expected to have some experience in building a structure such as this.

The Fuselage: From the side view build two sides of 1/4in square balsa. For accuracy build one on top of the other with a sheet of Saran wrap between. Cut out all formers and firewall. When two sides are dry, remove, and at the tail taper insides to a thickness of 1/8in..."

Jungster II, Flying Models, February 1976.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

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