Power-egg
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A power-egg is a complete "unitized" modular engine installation, consisting of engine and all ancillary equipment, which can be swapped between suitably designed equipment, with standardised quick-changing attachment points and connectors.
A BMW 801 Kraftei (power egg), being unloaded from a Gotha Go 242 transport glider. Russia, March 1943. Note the engine is already fitted with its cowling and cooling fan
A surviving Junkers Ju 88R-1 night fighter with Kraftei unitized-installation BMW 801 engines, RAF Museum London, 2007
The same aircraft with its engines removed, showing the bulkhead mounting points, 2016
A Merlin-powered, Beaufighter night fighter Mark II of No. 255 Squadron RAF at RAF Hibaldstow, September 1941, showing the Merlin Power Plants later used on the Lancaster.
Junkers Jumo 211
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The Jumo 211 was a German inverted V-12 aircraft engine, Junkers Motoren's primary aircraft engine of World War II. It was the direct competitor to the Daimler-Benz DB 601 and closely paralleled its development. While the Daimler-Benz engine was mostly used in single-engined and twin-engined fighters, the Jumo engine was primarily used in bombers such as Junkers' own Ju 87 and Ju 88, and Heinkel's H-series examples of the Heinkel He 111 medium bomber. It was the most-produced German aero engine of the war, with almost 70,000 examples completed.
Junkers Jumo 211
Junkers Jumo 211B/D engine at the Luftwaffenmuseum der Bundeswehr
The Me 264 V1 Amerika Bomber contract competitor fitted with four unitized Jumo 211 engines, each one matching the type fitted to Ju 88As
Jumo 211F