I am the owner and builder of a Willie II Biplane, I have seen the ad in barnstormers. I think that the Willie II and the Willy 2
are the same design. The Willie II was a 1971 attempt to copy the Pitts S-2, the designer was William Shober who
previously built a Pitts S1C.
The Willie II is size and structure of a S1C enlarged about 25%, powered by 150 to 180 lycoming, M-6 airfoil and 2 ailerons.
The gross weight of the prototype N7919 was listed at 1450 lbs with a 180 hp. lycoming and fixed pitch prop. Empty weight
was advertised as 856 lbs. ( Probably calculated as a no elecric accessories weight )
My airplane was completed in 1977 and now has 800 hours. it is powered by a lycoming 200 hp and empty weight is 1080 lbs
with an acro weight of 1450 lbs and normal gross weight of 1650 lbs, stall speed is 60 mph and cruise is 125 mph. Climb is
an honest 1000 feet per minute (take-off at 400 foot elevation and climb to 10,00 feet is 9 minutes)
I doubt that a Willie II even with a smaller engine and light weight would meet the LSA stall speed.
I think any 2 seat biplane with a 20 foot wingspan with those weights and the M-6 airfoil would be stretching the truth
to claim LSA compliant.
If you have any questions or need more info, feel free to e-mail me.
Robert Bush (Bob)