The first helicopters in service in Switzerland as for example those of the Bell 47G/J series had limited performances and were capable to transport a payload of about 200-250 kg. For the customer their hourly cost instead was extremely high (about 500.00 Sfr. in the '50s). As consequence it was necessary to prepare and weigh with accuracy each load. Only in this manner it was possible to overwork the transport capacity of the helicopter and guarantee contemporary a sufficient safety margin for the pilot.
In the picture n° 1 taken in July 1958 the mechanic Josef (Seppi) Knecht is weighting a load of wood tiles which will be used to cover the roof of a mountain hut.
The exact weight was written directly on the cargo or in a list.
In the picture n° 2 the load is ready to be trasported by Sepp Bauer who is here visible at the controls of the Agusta-Bell 47G2 HB-XAP of the Pilatus Air Service.

HAB 12/2009