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27.03.2012, 17:07
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Hi everyone.
New member but I have been drafting for quite a while now... from at least '05.
Nice to meet you all
Cutting to the chase, I am trying to draw ports and combustion chambers for a 4
cycle engine for cfd so I can so some porting for a friend I have made over
seas.
The trouble I have is a tad frustrating... and I was wondering of anyone would
have any tips? The most trouble I have is with the combustion chamber profile
(from the deck to angled poppet valves and angled spark plug. I tried splitting
up sections, but didn't help. I also had trouble converting this surface into a
solid... so I think I am doing something fundamentally wrong. The other problem
I was having (actually I have no idea where to start) is how to blend in the
valve guide into the port? I had just used a revolve tool for the guide and a
loft tool with changing ID for the port… looks very crude.
Also, another problem that has really stumped me, is drawing the centre line of
a port. eg, I have a valve tilted back 15 degrees, so I dont think I can use an
elliptical arc as it only seems to work when the start and end is at 90 degrees
to each other. I cant seem how to work out how to use a spline either :S
Thanks for reading and looking forward to trying some things out tomorrow
morning!