Munktell museum entrance. Ref. 1
Munktellsmuseet air engines.
Text and pictures Björn Bellander. Bilder aktuella 2004, 2012, 2016
Back Officiall website Swedish version
See also Munktellmuseum engines, Steam engine hall
© Björn Bellander
|Daimler Benz DB605B, Pratt Whitney TW3C, Isotta Fraschini, Links.|
How it started.
The Swedish Royal Air force ministry, or the European situation, forced the politicians to act in the beginning of 1940. All orders for military air planes had broke down. The English engines didn't arrive, the American Jeversky air planes were instead sent to the Philiphines, war ships from Italy were stopped. Saab was overloaded with orders for fighting air planes, but the air force could not decide what to put work in. J22, J23, B17 and B18 were on the move in Trollhättan, but there were no engines to be installed.
Now a skeleton agreements was written between Volvo, Air engine factory Trollhättan and Bolinder Munktell in order to start a construction of an air engine. This kind takes time. What to do between. In France, Germany hade taken as war booty a number of Pratt Whitney engines giving about 1000 hp.
They had a complicated production history in several countries like Polen. There were the same engine which was mounted in Jeversky. These engines were bought and paid by delivery of iron and special steel. But the goal for Sweden was to start production of an engine of their own.
Now there was an agreement with Bolinder Munktell and Swedish air engines Trollhättan (Old Nohab). Mainly the engine was to be copied, in spite of lack of license. During this time negotiations were done with Germany about a license for DB601. It was difficult as Reichluftministerium (Göring) could not made up their decision.
But suddenly everything continued and Sweden got a licens for DB605B.
This production was mainly put at Bolinder Munktell and Swedish Air
Engines Trollhättan. For this production new works were built in Arna
mountain. New production units were ordered and workers were hired.
Difficulties were to get trained engineers and mechanics. 50 fired shoe
workers from Örebro were hired and educated.
Agreements with the workers unit were signed for production of details in Eskilstuna. The Söderberg brothers got order to cast the crankcase. Extensive contracts were written with German sub deliverers for injection systems, light metal pistons, props from VDM and production of crankshafts.
Munktell also got a contract for overhauling of the delivered German engines and also swedish production and general service. There were big problems with the German engines and it also showed that Swedish industry was not ready to handle this high technological production. For this there were also to handle the standardization of replaceable spare parts.
It is supposed that "Measure-Johan´s" measure set was often used. Big delays arose and production could not start seriously until 1946 and at this time it was to late. In Finspång work was on for a reaction jet engine, but they never reach any acceptable level.
Only a small number of air engines were produced to be compared with the large number talked about in the beginning. But Eskiltuna got for this reason the most high technological production machine industry in Sweden.
DB 605 engine produced and mounted at Munktell Arna works.
|The result of all negotiations became a production of the 14 cyl. star engine Pratt Whitney which then was mounted in the fighter J22. It was a light airplane and even if the engine was weaker it made good result in tested dog fights. Bolinder Munktell succeeded good with this production even if most engines were mounted in Trollhättan. Munktell museum doesn't tell anything about this production..|
The type of engine first ordered for B17, B18. A two row slide star engine from Bristol. Read the link. Photo when visit Duxford air museum. It was never delivered from Bristol. Ref. 1
Saab B18 Wikipedia
Suspended swedish projects
|The Swedish torpedoe boats had been bought from Italy already before the outbreak of WWII war. It was the well known marine director Curt Borgenstam who got this task. The reason why Italy became the salesman depended much on the fact that Sweden had good contacts with the Italian industry since Sweden bought Italian submarines. These boats were equipped with Isotta Fraschini engines, very handsome engines with configuration W3 or V2. This means 3x6 or 2x10 cylinders. Atlas Copco got the licens to build and service these engines and the new engine got the name Polar 815. The Italian produced was only named 815. After the war Atlas Copco cancelled this licens and Royal Air ministry moved this to Munktell. About this part of engine production the museum does not tell anything..|
Isotta Fraschini at Köpingscar museum. Ref. 1
Isotta Fraschini info at former Skokloster museum. Ref. 1
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|Pictures from the
following owners have been used in bjorns-story.se with the
Reference 1: © Björn Bellander bjorn.bellander(at)telia.com
Reference 49: ©Picture from Wikipedia.
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