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my diamond wheel tool grinder runs at maybe 100 RPM and is always kept wet to avoid overheating anything (either the tool or the diamonds), its primarily for carbide but since its so low speed I also use it on HSS with no problems of the wheel ever wearing out, if you run at 3000 RPM you should...

Bruski, its now 2023 and, wondering if you're still there ? and the point, did you ever measure the actual nose radius of the final ground cams ? I've been drawing my own master cam using Don Bell's technique in Strictly IC (Oct '94) and the problem I keep seeing is that the dwell angle of...

I've tried to read the sony millman lh30 manual, but can't make much sense out of it, (I'm a former software engineer, so I'm used to lousy manuals, but this one takes the cake, and that's all I'm gonna say) here's what I want to do, set the Y-axis zero on the edge of my mill vise (back...

I think in the long run you are going to be happy with the modifications, I have two whole shoe boxes full of throw-away parts from designing and building my V-12, including a complete set of no-good con-rods, a complete set of no-good cylinder liners, three versions of the "wheelcase" until I...

NICE WORK !!! !!! !!! you said "here in Modena in the valley of engines (Ferrari , Lamborghini , Ducati )", I can see how you are inspired !!! to break in my V-12 I used a temporary "once through" oil system so that no particles could re-circulate, I had a fresh oil reservoir feeding the...

OR, a new cylinder casting from Stuart Models is pretty cheap !!!

Green, I was able to find "muellernick" youtube channel, but nothing on the model of the full size twin diesel photographed, is there somewhere else I should be searching ?

I was going to add make sure you can also use it for tapping, but I see that's already been covered, nice tool, well done :) !!! (building jigs is part of building models, this is just a larger than usual jig :) !!!)

if you take a close look at some of my photos you'll notice the parts or models are always sitting on a pad of extra large, 1/4" grid, white graph paper and a background of white poster board or white insul-foam. I don't do any post-processing. I use magnification lenses built in to the...

hmmm, for model sized boilers, flame tube length divided by 80 is way too small inner diameter to be practical, hence we need to focus on radiant heating rather than conductive heating, thoughts ? comments ? recommendations ? Peter.

agreed ! the nice thing about tapers is they don't have any slop so they can't vibrate, and its the vibration that always loosens the set-screw. I use a taper for my models of aircraft engines, which is standard practice for propellor hubs, but makes the same sense for flywheels as well...

close ups are all wrong, you want high magnification from a distance. a close up both distorts the image because of perspective (and also possibly fish-eye effects in the lens) and has poor depth of field. a shot from a reasonable distance is going to be nearly perfectly isometric IE nearly...

Nice !!!, so far all my IC engine big ends are lubed by pressure through passages drilled in the crankshaft, but if/when I use a splash system this here is what I'll base it on !!!

Brian, a very important topic !!! here's what works for me 1) rings - these will work as soon as they're lapped such that there's no visible light between the ring and a test cylinder or a ring gauge, use strong light and a magnifying glass or loupe (in reality neither Trimble "hot formed"...

Yesterday I needed a counterbore for a socket-head-cap-screw, so decided to make a "D-bit" for this size that I didn't have on hand, selected some O-1 rod for it, and then thought, this is steel, I'm using it on aluminum, probably doesn't need heat treatment Ooops !!!, that didn't work as...

I got it from Kozo Hiraoka's book "Pennsylvania A3 Switcher" :) !!!

your free monthly reality check 1. this guy isn't building a "model" engine, its a full size engine capable of supplying enough horsepower to run a car, so the discussion shouldn't be happening here in this forum, if (maybe when) something goes wrong it could very well end up being...

have to chime in here, if my big end is X thickness and Y width I start with X by Y bar stock (I try to adjust my design such that X by Y is an available size, EG 3/8 x 3/4 or 1/2 x 1), drill the big and little end holes, and use them to secure to a piece that gets clamped in the vise while I...

I find the "tenacity of super glue" to be unpredictable, I think for me most frequently on aluminum it tends to not adhere well, and that's even after filing the metal clean and leaving plenty of scratch marks. YMMV.

I am currently trying to diagnose why my home heating furnace isn't working, the flame ignites but the system turns off after a few seconds, apparently the flame sensor has gone bad. Point is to be safe these ignition systems are necessarily complicated. Failure modes are hard for the human...