Please use the Technical drop-down menus for lots of information
On the ‘Technical help’ page there are links to ‘old’ help articles by the Technical Officer - they show the kind of help which is always available, particularly to Association members.
Use the Technical sub-menus to view general measurement data for
Snapdragons: 21, 24, 27, 29, 600, 670, 747, 890.
Those copies of original pages have kindly been made available by the owner of: 747 Sail no. 303.