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WSK, LWD Zuraw, M11FR engine

Producer (type)WSK Wytwórnia Sprzętu Komunikacyjnego Warszawa, Poland
Propeller No.???
Production Date1951
Pitch???
Diameter2400 mm measured
EngineM-11-FR
Country of Origin Poland
Used on LWD Zuraw

 

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:

Imperial Propeller, Mercedes 100HP engine

Producer (type)Imperial Propeller, Germany
Propeller No.2153
Production Date1917
Pitch145 cm
Diameter270 cm
EngineMercedes 100 HP
Country of OriginGermany
Used onAlbatros B.I.

 

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.

 

MLP Cracow, Pegaz motor glider

 

Pegaz (Pegasus) motor glider exhibited at Muzeum Lotnictwa Polskiego, Cracow is equipped with GAD engine with two blade wooden propeller of 1,42 m diameter and 0,55 m pitch. Original drawing of propeller survived. Propeller consists of five lamination of ash.


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