About the propeller. The propeller was produced by Szomanski Fatory. At the moment the propeller was received from Marek Wojenka, the prop was prepared to serve as a mould for glass-laminate copies. Prop was restored, leaving originally numbers, date, producer and the engine type pressed on the hub. Pitch and diameter were already slightly tarnished. As all the inscriptions were already polished, they could not be repainted. The propeller was restored and , repainted and the sheathing placed again. Replica decals of IKAR and TONKILAQUE  VARSOVIE added. Now a part of private collection (2019).

Construction. The propeller lamination consists of 11 plies of ash wood. 1mm thich aluminium sheathing fitted, all covered by Tonkilaque coating.

Aircraft and Engine. The propeller was produced for early models of polish fighter PWS-1). For the moment it is the only known propeller and the piece preserved from this Polish built fighter. The prop was working with Lorraine Dietrich 12eb engine, 450 HP. 

References:

Literatura:

About the propeller, The propeller was produced by Wytwórnia Sprzętu Komunikacyjnego (most likely still in Łódź, with the new brand name WSK). Propeller is installed on LWD Żuraw plane, MLP Cracow. Renovation works accomplished by Nowak Serwice, October 2017

Construction. The propeller lamination consists of  ash plies. Diameter of propeller is 240. The propeller has sheathing on leading edge. The surface of propeller is covered with fabric and painted in olive drab. The WSK logo is painted on each blade.

Aircraft and Engine. The propeller was intended for Soviet five-cylinder 160 hp (140 hp max continuous thrust)  M-11FR, an ultimate M-11 engine version designed in 1946. The engine having 8,6 L capacity was rated at 160 hp at 1900 rpm. This engine was powering numerous aircraft used and built in Poland.

References:

About the propeller. The propeller is preserved in good shape. Except the propeller number and the engine type also  a pitch (H – 145 cm) and diameter markings (D – 270 cm) are clearly pressed on the hub. Also decals – both Pattee Cross (used by four German propeller producers) and manufacturer’s are well preserved. The manufacturing date of this prop is 1917-1918. Other markings visible are test speed and German airworthiness approval: GEPRÜFT FLZ. Comparing the other known Mercedes 100 propeller the pitch has been increased slightly – by 5 cm.

Construction. The propeller lamination consists of 7 plies including: ash, mahogany, and walnut(?). No sheathing fitted.

Aircraft and Engine. The propeller was powered by 74 KW (100 HP) inline, water-cooled, anti-clockwise rotation engine. Designed before WWI by the end of the war Mercedes 100 engine was already obsolete, so the propeller was most likely a replacement one. Aircraft powered by this engine were (for example) some WWI reconnaissance aircraft – Albatros B.I. and Aviatik B.

References:

1.  Bob Gardner, WW I Aircraft propellers, Volume 3.