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    vintage aviation gyroscope rebuild

    this is a WW-II vintage artificial horizon electrical gyroscope, or more precisely just the innards, no instrument panel display and no case, that I'm re-building, because in addition to engines I like all things mechanical (clocks too!), and who doesn't find gyroscopes to be mysterious and...
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    sony millman lh30

    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...
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    Frustrated ? Discouraged ? what a difference a day makes !

    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...
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    another Muncaster #9 Joy's Valve Engine, 2/3 scale, bar stock

    this 2/3 scale Muncaster #9 Joy's Valve Engine is all built from bar stock, except the base, its "cast" from TIG :) !!! my original inspiration was Simon Fraser's 2/3 scale, but in hind sight probably should have done raveney's 1/2 scale. my base is 5 x 14+" and the reason I found Simon's...
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    magnum 120 FS repairs

    I have a Magnum (chinese made from japanese OS molds) 120 four stroke that needs some work, I thought being a model engine builder this should not be too hard, only to become extremely disappointed with the Magnum internals once I got it apart, the valves need to be replaced because they're...
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    if the chuck fits wear it !

    rather than remove the 3-jaw, insert MT3-MT2 adaptor, insert MT2 ER collet, pray everything is concentric, I just chucked up the collet, turned out adequately centered and concentric !
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    yet another ring design thread, hot vs cold forming

    The Trimble "hot" method for forming rings results in a ring with uniform contact and uniform wall pressure all the way around it when it is compressed into the cylinder, when the ring is not compressed into a cylinder it is not a perfect circle, if it were Trimble could have gotten away with...
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    Joy's Valve Simulation, by Simon Fraser, enhanced by Peter Lawrence

    this is a simulation of Joy's Valve Gear, originally written by Simon Fraser, and slightly modified and enhanced by myself. its written in javascript, so runs in any browser window, and is easily modified. it currently simulates the original Muncaster Joy's Valve Engine, as well has a couple I...
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    Duesenberg Straight 4, quarter scale

    I started this Duesenberg Straight 4 too long ago for this to be a complete build blog, but am hoping this inspires some folks to ask for my plans, of what I consider to be both a beautiful and historically significant engine. The original is of course the "Straight 8" but I decided that would...
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    Lawrence Merlin V12

    in DiegoVV's thread "Olsryd Merlin - Feasible?" I posted a picture of my model Merlin, but I think it would be better to fork off since I didn't start with Oslryd's plans or castings. DiegoVV asks this is my own engine, designed from scratch and built from bar stock, based on cross section...
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