Hats off to Hanno Prettner for his Suprafly Curare ,Superstar and Calypso among others. Many world championships between them and the OS 61 Hanno Special
engine was a great addition for pattern then. Wish i still had mine.

I still have my beloved 1960 Kasmirsky Orion and a 1983 Prettner Calypso that are still flying to this day