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- Jul 16, 2007
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Well gentlemen it's getting to be that time of the year. It won't be long now till the leaves have fallen along with the temperatures.
I had 3 different projects in mind, a smaller version of Ron Colonna's Offy, a chassis and differential for my 302/transmission project and a radial engine. For this winter it's going to be a 5 cylinder radial engine.
Not wanting to follow the mainstream and build someone else's engine, although there's some beauties out there, I started on my own design.
I have a complete set of drawings for the old Morton radial that an old fellow gave me many years ago. Having read about this engine in the past and after studying the drawings there were many features of this engine I just didn't care for so I pulled out the CAD and started in.
The bore and stroke will be the same but the cylinders and heads will be separate. Instead of having the cam and pushrods in the rear I moved them up front and went with an internal cam gear design ala the full sized engines. This engine will have a double oil pump, feed and scavenge, to lubricate everything. It will be driven off the rear of the crank along with the distributor.
I changed the angle of the pushrods as the Morton has widely splayed ones. This meant changing the shape of the cam lobes as both valves are operated by one set of lobes in this engine. It also meant a redesign of the rocker pedestal and the top of the head.
I pretty much have the basics all designed and just need to refine everything and make the working drawings.
All of the gears are available through Stock Drive Products including the internal gear so no fancy gear cutting will be required.
I am attaching a PDF of my layout progress so you will have an idea of what this is going to look like.
George
View attachment ENGINE RADIAL SHT 1 BLACK.pdf
I had 3 different projects in mind, a smaller version of Ron Colonna's Offy, a chassis and differential for my 302/transmission project and a radial engine. For this winter it's going to be a 5 cylinder radial engine.
Not wanting to follow the mainstream and build someone else's engine, although there's some beauties out there, I started on my own design.
I have a complete set of drawings for the old Morton radial that an old fellow gave me many years ago. Having read about this engine in the past and after studying the drawings there were many features of this engine I just didn't care for so I pulled out the CAD and started in.
The bore and stroke will be the same but the cylinders and heads will be separate. Instead of having the cam and pushrods in the rear I moved them up front and went with an internal cam gear design ala the full sized engines. This engine will have a double oil pump, feed and scavenge, to lubricate everything. It will be driven off the rear of the crank along with the distributor.
I changed the angle of the pushrods as the Morton has widely splayed ones. This meant changing the shape of the cam lobes as both valves are operated by one set of lobes in this engine. It also meant a redesign of the rocker pedestal and the top of the head.
I pretty much have the basics all designed and just need to refine everything and make the working drawings.
All of the gears are available through Stock Drive Products including the internal gear so no fancy gear cutting will be required.
I am attaching a PDF of my layout progress so you will have an idea of what this is going to look like.
George
View attachment ENGINE RADIAL SHT 1 BLACK.pdf
Looking forward to this thread would be an understatement.
