Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
A lot of speculation and not a lot fact.
The 1946 edition of "Aircraft Engines of the World" is the 4th edition, the earlier ones being the 1941, 1944, and 1945 editions (many pages of this edition are available either on this website or on Spitfire performance). In some cases pictures and descriptions were repeated from year to year or only a few details changed. In fact changed pages or new pages are marked/lettered new at the top so no it would not have taken months for a new edition to be prepared.
BTW the 1946 edition shows no German piston engines, only jets. Also no Japanese engines or Italian engines. Think of the book as sort of a commercial catalog. Nothing that was top secret is in the book. Only engines that one might assume are already known in the press or makers were trying to market. There are about 30 pages worth of adds in the front of the book for things from complete engines to spark plugs and radiators.
WW II was not raging when this book was prepared, the preface was written in Feb 1946.
The French Mathis company has 5 entries ( 5 full page photographs and 5 pages of data) for 5 different engines.
an air cooled inline 4 cylinder 3 liter
an air cooled 7 cylinder radial of 5.3 liters
an air cooled inverted V-8 of 6 liters
an air cooled 14 cylinder 2 row radial of 10.5 liters
and the big 42 cylinder (7 banks of 6 cylinders) liquid cooled engine of 59.3 liters called the Vega.
Mention is also made of the larger version, the Vesta of 119.4 liters but no photo.
In the 1947 edition the big engines disappear but a flat 4 shows up (also 3 liter) as does an X-16 ( two of the V-8s driving a common propshaft) .
By 1948 the radials had disappeared and photos only show the flat 4 and the V-8 although different versions are described and the inline 4 and X-16 get brief descriptions.
In the 1949 edition there is no mention of the Mathis company.
All photos of the Mathis engines are the typical engine only with no background and no hanging wires. This includes the photo of the 42 cylinder engine.
I really like finding out about French piston engines, and I really don't mean to derail the thread, but does anyone have any information about the experimental Saurer FLB 2000 engine from the WW2 period? Supposed to be two stroke, opposed pistons, fuel injection, obviously supercharged.
I'm intrigued - keep me posted. You might like to pursue your inquiries in respect of high power-density Diesel tank-engines which I believe Saurer were developing at WW2-end. The aero-engine may have been a derivation of that work. Cheers.I really like finding out about French piston engines, and I really don't mean to derail the thread, but does anyone have any information about the experimental Saurer FLB 2000 engine from the WW2 period? Supposed to be two stroke, opposed pistons, fuel injection, obviously supercharged.
View attachment 546004
Had a chance to look at the photo on a bigger screen today. Since I am unable to refer to the original copy of Wilkinson's book I can't be sure. I had already seen the photos on Pearce's web-site and other sources before and am not sure that it was identical. Still, the timing of photo availability is still constrained. I am not aware that there was any pre-invasion release of pictures so there are still elements of intrigue. Even more mysterious - not just the engines - but what about all the technical documents; test reports, brochures, drawings, engineering blue-prints, etc.? Seems that MATHIS or other agencies must have had a wholesale cleanout. Rather surprising that nothing was souvenired for the company historical archives.For "Aircraft Engines of the World" there doesn't appear to be any "revised/un-revised re-printing dates" from 1944 on it was an annual, at least until the late 50s? By 1960 the book is the 1960/61 edition. I don't have the 1945 edition. I do have the 1941, 1944, 1946, 1947, 1948, 1949, 1953 and some later ones.
The Preface timing slipped over the years, In 1941 it was dated in Jan and by 1960 it was dated in June. In the preface it is often noted how many changes there are from the previous edition. Number of new pictures or new pages. The 1946 preface also states that the three Axis countries -Germany, Italy and Japan have been deleted.
this site has some pretty good information.
Mathis Vega 42-Cylinder Aircraft Engine
The photo in the 1946 "Aircraft Engines of the World" appears to be the same as the 3rd one in that article.
Hi "Shortround6", As an afterthought, are you able to scan the MATHIS 'Vega' picture from "A.E.o.t.W, 1946 Ed." and up-load it? I'd like to refresh my memory of what I'd seen. Thanks.Had a chance to look at the photo on a bigger screen today. Since I am unable to refer to the original copy of Wilkinson's book I can't be sure. I had already seen the photos on Pearce's web-site and other sources before and am not sure that it was identical. Still, the timing of photo availability is still constrained. I am not aware that there was any pre-invasion release of pictures so there are still elements of intrigue. Even more mysterious - not just the engines - but what about all the technical documents; test reports, brochures, drawings, engineering blue-prints, etc.? Seems that MATHIS or other agencies must have had a wholesale cleanout. Rather surprising that nothing was souvenired for the company historical archives.
Had a chance to get near a bigger screen PC to refresh my memory. The reference I had in mind came from Karl Lundgren's "Professor Porsche's Wars" and indeed was a Porsche/Simmering joint development project (see pictures attached) - very advanced for its time. It was Saurer's post-war diesel developments that de-railed my memories.I'm intrigued - keep me posted. You might like to pursue your inquiries in respect of high power-density Diesel tank-engines which I believe PORSCHE/SIMMERING were developing at WW2-end. The aero-engine may have been inspired by that work.