W&B 4-5

Figure 4-4. Weight and loading for WSC aircraft. Hang point Keel roller Rear Front Keel roller adjustment holes U bracket The effect of changing the hang position is to change the trim speed of the aircraft. Moving the hang point forward increases trim speed (shorter distances to the datum). The hang point position range may be used on the applicable wings for the entire weight range of the aircraft. CG limits on the trike base/gondola section of the aircraft limits are not critical. The defined hang point position and its limits are defined in this document. The datum point is the forward bolt on the nose plate (a line between the leading edge pivot bolts on the nose plate) referenced to the hang bolt at the top of the mast for the trike base (gondola). Moving hang point position is made by moving the keel roller forward or backward along the keel or by moving the hang point within the U-bracket. A sticker is used on the keel to show the standard position for the keel roller. It lists the keel tube holes used as standard trim points for each model wing. The table below shows the standard keel roller position and the allowable range of CG position/hang bolt position referenced to the nose plate datum. Diagram of the wing hang point construction, showing keel, U-bracket, and the top of the control frame. Wing model and maximum takeoff weight Streak 3 MTO@ 450 kg Streak 2B MTOW 450 kg Cruze MTOW 450 kg Wizard MTOW 430 kg Standard trim position and range Distance from the forward keel roller bolt to forward nose plate bolt Keel hole 2, second from front 1,340 mm +0 – 20 mm Keel hole 3, third from front 1,360 mm ±20 mm Keel hole 3, third from front 1,360 mm ±20 mm Keel hole 1, at front 1,545 mm +0 – 45 mm Distance from the hang point to forward nose-plate bolt Permissible rear and foremost positions Permissible U-bracket holes 1,293.5 mm (54.9 in) rear limit 1,353.5 mm (53.3 in) forward limit Middle U-bracket hole only 1,413.5 mm (55.6 in) rear limit 1,373.5 mm (54.1 in) forward limit Front and middle U-bracket hole only 1,413.5 mm (55.6 in) rear limit 1,373.5 mm (54.1 in) forward limit Middle U-bracket hole only 1,578.5 mm (61.2 in) rear limit 1,648.5 mm (64.9 in) forward limit All U-bracket holes permitted Date Empty weight Maximum takeoff weight Registration Wing model Serial number Make and (trike) base model Airborne XT series/X series aircraft Applicable wing models Airborne streak 3/Streak 2B/Cruze/Wizard wing