The aspect ratio, so important for thermaling, increases from 19.5 for the trainer to 22.7. The increased wingspan aims at ambitious cross country soaring even more than the trainer. Only the small front wheel and the tail wheel protrude. For rigging or derigging three people and one wing stand are sufficient, but as usual with large sailplanes some effort is involved. The 1.60 m long wing extensions with integrated winglets can be handled by one person by inserting the extension spar into the proper tunnel in the main wing.
Pins secure the aileron extension into the wing extension.
In the fuselage all connections are automatic. Locking is conveniently through the tail fin. There are some changes in the cockpit of the 505 as compared to the 500 which enhance both passive security and comfort. There are now headrests for both pilots based on the latest research. There is more room in the front seat.