The Parnall Parasol was an experimental parasol winged aircraft design to measure the aerodynamic forces on wings in flight. Two were built and flown in the early 1930s in the UK.
Parnall Parasol, but two were built and probably not an ultralight!
If it's the decade, I wonder how many Perman Parasol (Grasshopper) or
Broughton Blayney Brawny were built.1
The Parnall Parasol was an experimental parasol winged aircraft design
to measure the aerodynamic forces on wings in flight.2
Made by Parnall.
3 - Parnall Parasol first prototype K1228 possibly at
Martlesham Heath.3
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