This is the "Instytut Lotnickwa" or Aeronautical Institute.

-Instytut Lotnickwa developed interesting turbine engines such as the IL-SO-1, a single-shaft turbojet engine for the "Iskra" airplane. It had a 7-stage axial compressor, an annular chamber and a single-stage turbine.

“SO-1”

-The SO-1 gave way to the SO-3 (both produced at the WSK-Rzeszow plant).

“IL SO-3”

-The SO-1 had a thrust of 2,205 lbf, while the latter gave 2,425 lbf.

-The IL-K15 was a turbojet engine announced in 1988, with a 6-stage compressor and with discharge valves in the compressor. There is a K-16 as well.

-The K15 had an annular combustion chamber with 18 injectors for normal operation and six more for starting.

-The turbine had a single stage. It delivered a thrust of 3,300 lbf at 15,900 rpm.

“K15”

-The D18A is a two-shaft turbofan with two axial fan stages. It is built under Ivchenko license.

“D-18A”

-IL is the Institute of Aviation in Warsaw.

“Logo”

-The K-15 engine mentioned above has been baptized with the name of "Kaszub".

-This engine has been built with the collaboration of the Aviation Institute (IL), PZL in Rzeszow and PZL in Hydral.

-The work started in 1994. It is an improved modification of the SO-3.

“K-15, Kaszub”

-The SO-3 is installed on the "Iskra" trainer, while the K-15 was intended for the I-22 "Iryda".

-It gave 1,500 Kgf (DaN) of thrust at 15,900 rpm, and weighed 340 Kg.

-This engine had little time between general overhauls, only 1200 Hrs, (TBO).

From Appendix 9: The K-15 turbojet was designed by Falecki in the year 1985.

“Motor IL, K-15”

In 1997, the same designer made the K-16 that we show in a section drawing below.

“Motor IL, K-16”