Span 56 cm / 22 in
Weight 19 g / 0.67 oz
The original Mü 4 was built 1927 in Germany and had its first flight in 1928. It proved to be well designed but only one was built. Wingspan measured 12.14 m / 39.8 ft and gross weight was 185 kg / 408 lb. Further details seem to be unknown. Photos and drawings of the glider are scarce.
Building the balsa sheet chuck glider Akaflieg München Mü 4.
Materials:
Fuselage: hard B 1.5; fin: hard B 1; wing supports (optional): B 2 x 3; wing struts: hard B 1.5; wings: B 1.5; horizontal stabilizer: hard B 0.8; Ballast: small piece of lead or scrap metal.
Assembly:
Cut out all balsa parts. Sand well. Mark positions of struts on fuselage and wings. Transfer outlines of fuselage structure, of rudders, elevators, ec. from paper to wood with pen.
Fuselage:
Fix fuselage on your building board with needles. Cement fin on fuselage and let dry (photo). Cement wing support strips to fuselage on both sides using clamps or clothespins. Let dry.
Wings:
Fix one wing half on building board with needles. Underlay second half according to given dihedral and cement (photos).
Empennage:
Put fuselage on so called “third hand” and cement horizontal stab into fuselage cutout in the rear of the fuselage using needles to hold in place (photo). Check symmetry and let dry.
Final Assembly:
As the fuselage is still resting on “third hand” cement wing on wing supports. Use needles to hold in place. Diligently check symmetry (photos).
Cement wing struts into their positions. Needles can be helpful at this step.
Balance model in accordance to given CG on plan (photo).
Have a pleasant flight! (гарного польоту!)
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