Engines > From Kits/Castings

CHUK " V "

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Jasonb:
It's all Grahams fault, he made me do it honest :LittleDevil:

At the end of August Graham sent me that napkin sketch with a very basic spec, I liked the idea and asked him for a few dimensions of the cylinder castings and while waiting had come up with a basic design using enlarged 3D models of many of the parts from my version of the CHUK range "CHUKY"



After several exchanges of e-mails sending screen shots of the evolving engine to Graham for comment a final design had been agreed by the end of September with a one piece crankcase that would carry the overhung crank on one side and have a cover plate on the other side bearing the CHUK V name with the intention that this could be buffed up to look like the Stuart BB that Graham had seen. It will use a modified version of the existing cam profile that will be housed within the crankcase with tapped guides set into the top of the crankcase. The builder will have the option to machine 5 holes in the flywheel side of the casting to make it possible to watch what is going on inside.



As Graham mentioned the existing cylinder castings can be used with some machining of the end to allow them to be fixed to the crankcase flanges with yes you guessed it 5 studs and nuts. The head castings will incorporate a boss to house the exhaust spring and may be retained with studs and nuts or with counterbored holes for screws



The plate that closes up the crankcase will have recessed letters allowing the builder to buff up the surface and inlay the writing with their chosen colour of paint, red or black seem likely candidates. Once again the cover will have 5 fixings and Graham likes the idea of the recessed screws to match the look of that bike engine that Graham lusts after.



For those that are wishing they had not sold their old bike I did sketch out a possible alternative head and exhaust option



Or there may even be other possibilities using the same crankcase casting



What will follow is a few posts showing the pattern making process and if you are good boys, girls and elephants Graham may then show you some shiny castings :)

Twizseven:
This looks interesting. Need to get few others done first.

How long before Surus asks for a set.

Colin

Dave Otto:
Interesting project guys!
Will be fun to watch.

Dave

Jo:

--- Quote from: Twizseven on November 20, 2020, 09:19:41 PM ---How long before Surus asks for a set.

--- End quote ---

He is more interested in the boxes of Snickers that turned up the other day at the moment  ::)

Jo

Jasonb:

--- Quote from: Jo on November 21, 2020, 08:00:27 AM ---He is more interested in the boxes of Snickers that turned up the other day at the moment  ::)

--- End quote ---

I doubt he will have any problems finishing them :LittleDevil:

I thought you liked V twin's Jo, does not seem long ago that I drew this out and you said "You know how much I love Hoglets, its on my build list along with another couple" At least you seem to be able to get the flame lickers running unlike any four-strokes.

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