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when I turn a combined seat and guide the piece sticks out beyond the chuck and is made in a single chucking so the turning and drilling all end up both perfectly concentric and perfectly round, then I use loctite to hold them in the head, I do not press them in, I did that once and they shrank...

I used some "start ya *******" on my Merlin V12, that was the only time it ever backfired, and given the large volume of the intake manifold, it was quite a backfire resembling a gun shot more than an engine pop, not using it any more :-( !!! anyway, following this thread with interest as I...

OK, I stand corrected, I do now see a parting line in fig 36 between head and block, I was only slightly mis-interpreting the drawing below fig 18 which does show studs going from the top of the head all the way into the crank case, but it doesn't show a parting line between the head and the...

you can't have too many high voltage toys :-) !!!

is there some reason to not model the Rolls Royce ? the Allison has a couple things going against it 1 - the head and cylinder block is one piece, the cylinder liners are inserted from below, which is very problematic (yes Barry Hares modeled an early RR that had that problem, as...

so you prototyped this, and abandoned it after you measured the efficiency and decided that even solar panels which are pretty inefficient would generate more electricity ???

my point is that people participating in this thread are trying to "engineer", in the sense that they hope to apply known formulas to the situation, in the case of turbo machinery (that uses blades) this is fully understood and there are thousands of text books on the subject, in the case of the...

OK, so my point is this, the Tesla Turbine isn't used anywhere for anything for a very good reason, its inefficient, and there's no getting around that fact (hence not even the military would use it), so it never ceases to amaze me that people keep on building demonstration models of something...

you've got the photo, what more do you need ? :-) !!!

can anyone point out any uses of Tesla Turbine in the real world, a real product, not just a toy or a demonstration model ?

Charles, thanks for the correction !, in the CAD drawing it *looks* flat !

Green, AFAICT there is nothing to be gained using linear bearings, its an added complication plus they are expensive, AFAIK everyone uses a pivot, and when I say everyone I mean everyone from full size professional automotive cam grinders to our teeny tiny model engine cam grinders...

I'm not talking about the pistons, I'm talking about the *rotary-valve* that these rotating-cylinder swash-plate type pumps have

FYI, I made something similar a while ago, the one troubling thing I noticed is that where the cylinder pushes against the valve plate both end up with scoring and abrasion, brass-on-brass it seems is the worst possible choice for bearing materials (even when lubricated). I am planning on...

in a perfect world (?) the master cam's cam follower and the grinding wheel would have the same diameter/curvature, in that way the ground cam will be "exact", in the real world my master cam is about 2" diameter and my grinding wheel is about 4" diameter but I'm not able to detect any anomaly...

TL;DR, the CAD program does not know anything about the "center" of your cam design and does NOT simply extend radially from that "center" (which would only work for the base circle and not for the flanks or nose). CAD programs find the "normal" (perpendicular to the "tangent") at each...

here is the Don Bell "Master Cam Design" article, I find it hard to read because it tells you what to do but you then have to reverse-engineer what's going on, which is this, you start with the center points for the 3 arcs at exact scale, then ADD the same amount to each radius and you end up...

you've mis-identified the cam rotation point, see the "pointy" ended rods, those are "dead centers" for the cam blank which has to have been "center drilled". hopefully you remember "similar triangles" from elementary school geometry, if the master cam center is 4 times as far from the pivot as...

since I usually advance the grinding wheel by .001 to .002 per revolution of the cam it takes quite a few revolutions to grind a cam with .078 or .094 lift, which need to go slowly and evenly, so yes you'd much rather have a simple motor driving the revolutions, after all the time and effort for...

funny you should say that, I just ended my Duesenberg ring procrastination... am experimenting with yet another method of cold formed rings (my heat treat furnace element burned out and haven't found a replacement yet). my previous attempt at cold formed rings resulted in them needing to be...