Jumo 222
( --- )
Twentyfour Cylinder multibanked, six bank radial,
petrol engine, four strokes, liquid cooled,
designed by Brandner, 286 built




Construction of the Jumo 222 began in 1937. On April, 24th 1939 the first static test run was performed The first inflight test took place on November, 3rd 1940 oboard a Ju 52. Initial production series Jumo 222A-1 and B-1 were only built in few numbers A- and B-series differ in the airscrew ratio.

The production of the series I was stopped due to technical problems. The series II got a larger capacity and a modified ignition system As the problems still remained, the production of Jumo 222A-2 and B-2 again was stopped in late 1941. Jumo 222 A-3 and B-3 were designed as special high altitude engines, but only a few were built and installed in a Junkers Ju288V9.

The Jumo 222C and D-series again got a larger capacity and higher r.p.m. rates in summer 1942. These series were installed for trials in several aircraft types (i.e. Ju288 and He219) But technical inefficiency remained, so only a few engines of these series were built.

Jumo 222E and F-series were designed for high altitude flights since 1944. Both types represented a Jumo 222A/B with a two-stage supercharger and aftercooler. Due to the still remaining technical problems and the intensive bombings of Dessau the development of these types was very slow.

The final series Jumo 222G and H were fitted with an exhaust driven turbo supercharger.
Only a few test engines were built before the end of WWII.

Finally the Jumo 222 did not reach a real production status. Technical problems remained until the end of WWII. A total of 289 engines were built until the end of the war. The Jumo 222 was the standard engine of the Bomber B program of the RLM. Due to the intensive development problems of this engine, finally the complete Bomber B program came to an unsuccessfull end.

Technical Data:
Engine Designator year Cyl. Bore
in mm
Stroke
in mm
Volume
in litres
Compress.
in %
length
in m
Height
in m
Width
in m
Weight
in kg
T/O Power
in kW
Cruise Power
in kW
RPM.
Fuel
Consump.
g/kWh
Jumo 222A/B-1
Jumo 222A/B-2
Jumo 222A/B-3
Jumo 222C, D
Jumo 222E, F
Jumo 222G, H
1939
1940
1940
n.a.
n.a.
1944
24 135
135
135
145
140
135
135
135
135
140
135
135
46,5
46,5
46,5
49,9
55,5
69,6
6,5 2,208 n.a. 1,160 1170 1838
1838
1838
2206
1838
1838
1397
1397
1368
n.a.
1353
n.a.
3200
2900
3000
3200
3000
n.a.
n.a.


Aircraft Types equipped with Jumo 222:

Dornier Do 435
The Dornier 435 project should be equipped with a Jumo 213 or a Jumo 222.
Finally this aircraft design was also stopped by the RLM.

Focke Wulf Fw191
The standard engine of the Focke Wulf Fw 191 bomber should become the Jumo 222.
As the serial production of the Jumo 222 engine did not start early enough,
prototypes V1 to V5 were equipped with BMW 801A.
The Fw 191V6 was finally equipped with Jumo 222A/B.
But the engine performance was not good enough
and several alternate engine designs were made for the aircraft.
Finally the complete Fw191 was dropped due to a missing engine.

Focke Wulf Fw300
During WWII Focke Wulf was engaged in the further development of the Fw200.
The projected Fw 300 shoud be equipped with Jumo 222 engines.
The design was developed at SNCASO in France and finally stopped.

Heinkel He 219A-4 and B-1, C
The original night fighter He 219 was equipped with the DB603 engine.
The A-4 series was a design for a combat aircraft.
Instead of the DB603, this aircraft was powered by the Jumo 222.
The A-4 series never went into production.
Another He 219 series B-1 was a destroyer project.
This aircraft should also be equipped with two Jumo 222A/B.
A few aircraft were built for experimental trials, but did not enter serial production.
The final He 219 C-series was also projected with two Jumo 222.
This night fighter aircraft did not went into prototype development before the end of WWII.

Junkers Ju 288A and B
The Junkers Ju 288 bomber was equipped with Jumo 222 as the standard engine.
As the Jumo 222 was not ready for production in 1941, V1 to V4 got BMW 801 engines.
Later V5 and V6 were the first Ju 288 with Jumo 222A/B engines.
No serial production was initiated due to technical problems
The redesigned B-series of the Ju 288 also got the Jumo 222A/B.
A few aircraft were also equipped with the Jumo 222C/D.
Later prototypes of the B-series were equipped with BMW801 and DB606.
As the serial production of the Jumo 222 did not come into action
the Ju 288C series was equipped with DB610 by standard.
Only a few more were built before the end of WWII.

Junkers Ju 52
The first Jumo 222 inflight test was performed with a Junkers Ju 52.
This aircraft was also used for subtype tests of the Jumo 222.




Updated:
28th December 2003
The Hugo Junkers Homepage
at http://www.junkers.de.vu
Horst Zoeller, Germany, November 1996
hugojunkers@yahoo.de

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