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This thread is nice, many CAD presented I didn't know about. Solid Edge (Siemens) is also a good option for modelers. I use it both for work and since a while for hobby. - "Maker"/Hobby license, 0,00 €/£/$ - it's a full version like the commercial license, all is included and functional -...

That's two nice engines. Interested to see your 4cyl. crankshaft & connecting rods. You live at a nice place. I've been visiting Arcachon and Isle d'Orleron a few years ago, that should be nearby. Won't forget the coastal patrol with Mirage 2000 at that time, they were flying fast and low all...

Hi, i'm working on something similar but far away from a scale engine. Mine will be 30.4 mm bore and 27,5 mm stroke from practical reasons. And cylinders are offset left to right column. However it is liquid cooled and with reduction gear. Purpose is to power my 22% size P51. Design is a mix of...

Would also love to see this Radial from Dnepr. Cyl. :) The old "flathead" would be nice for a build. Sound is nice and Valvetrain interesting.

Hello, This one should work. For offline websites from past times just visit archive.org and type in the old URL. http://web.archive.org/web/20100728140521/http://www.olsryd.com/ You can also enter sites by yourself you wish to be preserved for long years. It is very interesting for the many...

Got it. Archive.org preserved the work of Karl-Erik Olsryd. :)

Hello, I'm looking for the Alsyrd information for the Whirlwind radial. Unfortunately the linked website seems not to exist anymore. Could anyone help me with the drawings etc. for this engine? I would highly appreciate if someone could help me in this matter. Best regards, Christian

Fantastic work! Thanks for sharing your ongoing project! The cylinder head is very nice, it must require an enormous work and time to earn these results. Christian

Thats the challange I was also confronted with. I found a good solution by changing from the common internal ring gear (2 stages) to a cam gear of 3 stages. The advantages of this gear were a larger-diameter pinion on the crankshaft, and a much cheaper gear itself. The price of these advantages...

SKmetal7, these Parts are stunning to look at, great work so far! Many details of your work look well designed, but about a few of them I'm concerned about their dimensions. Especially the crankshaft looks very thin - what about the stiffness of this part? I'm in construction of a 9cyl. radial...

Many Copper-Zink alloys carry the imminent danger of so called "stress corrosion cracking". This phenomenum means a fast cracking of the material caused by the combination of - mechanical stress - under the influence of a specific media that will induce the cracking process There are materials...