Note :  As with all amateur built aircraft,  it is the builder's sole responsibility to ensure all precautions are taken to build and fly safely.  The purchaser hereby accepts all risks associated with construction and operation of amateur built aircraft.
 
Designed and prototyped in the spring of 1984, the 7/8 scale Nie. 11 went through a hurried 10 hours of serious test flying before being loaded on a trailer for the trip to Oshkosh. Flight testing included the usual stuff, while I was watching, (and some “unauthorized” activities when I was not.)
 
Loops, spins, Split S and a  power dive were performed on C-IRCA (do not try this at home folks! Aerobatics NOT recommended! )
 
The 11 can be built with lightweight TUFF wheels and a Rotax 447 in the US Ultralight category. As a registered homebuilt, (or UL in Canada) it can be built in a range of variants including the Ni 17/24/27 and Siemens Shuckert D1.
* Recommended powerplants include the Rotax 503, 447, or VW.
 
Construction: The structure is 6061 tube with pull riveted gussets and bolts. Wings and fuselage are fabric covered. Plans are designed for the first time builder with basic tools.