RE: Prettner Calypso Plans...
Some performance curves and specs for the Super Tigre S.61 (ring)
UStik - I wondered how a V/P prop could be described as an 11X9. That's my excuse anyway! Sorry for the "duff gen" ( there's an old English expression for you to research)
The W/Cs were held at Pensacola when the Calypso won. Surely some of our US readers/posters were there and have some photographs or recollections of the model.
Ray