Hello NC!
I was wondering if you have heard of this book
Cam Design Handbook: Dynamics and accuracy by Harold A. Rothbart
I am interested specifically in the formulas for calculating the minimum diameter of a solid, flat bottom lifter for a given lobe shape. I would like to also calculate the lift in 1 degree increments for a given shape and the acceleration/G force so that I can better select valve springs.
Keep in mind that this pertains to model engines. I'm sure that this is not the modern way of doing things but would be a big improvment over the flat flank designs being used in models today. I make the cams in a fixture so i can get close to a predetermined lift, duration, and base, flank, and nose radius.
This text is expensive (>$100) but worth the coin if it answers the above questions. If It is not so good, could you advise as to a better book or source for this math.
I'm not even sure that I will understand what i'm reading but I'm willing to try to figure it out. You probibly think i'm nuts to go thru all this for a model engine. I'm just wierd that way. Trying to "step up my game" in the camshaft area.
You may have seen my latest effort. This is for a V4. It is just under 3 inches long. Altering the depth of cut alters the lift and base circle. If i change the center to center (offset) i can change the flank radius. The number of cuts i make rotating the shaft in the fixture alters the duration.
After you stop laughing you can see that the level of quality will never be to yours but I believe if I can get a handle on the math, i can design model cams, followers, and springs that will work very well.
Steve