Between wars engine documents

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1st Sergeant
Sep 19, 2012
While trying to find an on line source of pages missing from one of my RAF prewar manuals I came across this sales brochure for the Bliss Jupiter motor - which turns out to be a US licence built Bristol Jupiter. Also found an RAF Liberty manual which will go in the RAF engines thread once I process that.

The Jupiter engine was widely built in a number of countries and some of that is reflected in the brochure, along with far more technical info than you will find in later sales brochures.

Being a Gobble scan it had all the problems that go with documents that are scanned by people to who fall into the category it is just a job and I don't give a sh*t about quality.

I do not know the original page size so I just took the maximum page size in the set of scans as my guide.

I fixed the usual Gobble scan problems, other than low resolution, as best I could. I am still working on the cover.


This sort of sh*t is annoying as this means the scanning person moved the page before the scan was complete - fixing it means finding the same words elsewhere in the same document and then doing a cut and paste. Photos and diagrams have to be extracted then squared then reinserted. All because the operator did not give a ****. A reason why I prefer to work with my own documents and scans.

I found some of the missing pages for the other manuals and the scanner operator was too lazy to open out the folded pages so they are totally useless,


  • Jupiter Radial Engine sales brochure ww2 OCR.pdf
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Perfectly true, some people don't work in a "result" mind.

But many, many thanks for your work (s) !!!!!!!!
A couple of clips from Wikipedia on the Jupiter engine. Bristol Jupiter - Wikipedia

By 1929 the Bristol Jupiter had flown in 262 different aircraft types,[13] it was noted in the French press at that year's Paris Air Show that the Jupiter and its license-built versions were powering 80% of the aircraft on display.[14]

Licensed production

The Jupiter saw widespread use in licensed versions, with fourteen countries eventually producing the engine. In France, Gnome-Rhone produced a version known as the Gnome-Rhône 9 Jupiter that was used in several local civilian designs, as well as achieving some export success. Siemens-Halske took out a licence in Germany and produced several versions of increasing power, eventually resulting in the Bramo 323 Fafnir, which saw use in German wartime aircraft.[6]

In Japan, the Jupiter was license-built from 1924 by Nakajima, forming the basis of its own subsequent radial aero-engine design, the Nakajima Ha-1 Kotobuki.[7] It was produced in Poland as the PZL Bristol Jupiter, in Italy as the Alfa Romeo 126-RC35,[8] and in Czechoslovakia by Walter Engines. The most produced version was in the Soviet Union, where its Shvetsov M-22 version powered the initial Type 4 version of the Polikarpov I-16 (55 units produced). Type 4 Polikarpovs can be identified by their lack of exhaust stubs, rounded NACA cowling and lack of cowling shutters, features which were introduced on the Shvetsov M-25 powered Type 5 and later variants (total production 4,500+ units).[9][10] Production started in 1918 and ceased in 1930.

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