| Producer (type) | Imperial Propeller, Germany |
| Propeller No. | 2153 |
| Production Date | 1917 |
| Pitch | 145 cm |
| Diameter | 270 cm |
| Engine | Mercedes 100 HP |
| Country of Origin | Germany |
| Used on | Albatros B.I. |
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- Photo 1. Markings, Photo: A. Perzyna
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- Photo 2. The HUB – Front, Photo: M. Peikert
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- Photo 3. The HUB – Back, Photo: M. Peikert
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- Photo 4. The Tip, Photo: A. Perzyna
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- Photo 5. The Pattee Cross, Photo: M. Peikert
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- Photo 6. The Imperial Decal, Photo: A. Perzyna
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:
- Bob Gardner, WW I Aircraft propellers, Volume 3.