Troy Lake The photo give shows the very long booms required for first generation of sails of only 6.5 sq m. Booms were not adjustable so small sails were often made to fit the booms.
Troy Lake Some sails were very baggy and became unusable above Force 3 winds.
Hillingdon Sailing Base There were several fun events where just staying on the board was a challenge. HSB on fancy dress day.