Water ballast tanks for 150 litres are carried in the wing roots with fill and jettison valves, in the fuselage for early versions, in the wings for later aircraft.
2.
The next development of the SZD-48 involved a new forward fuselage with forward opening single piece canopy, which simplified production as well as improving access to the instrument panel and rudder controls, a rudder with increased area and revised water ballast system with individual vent / jettison valves for each wing tank and special funnel for filling.
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