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05-02-2013

Last Activity:

01-25-2017 1:54 AM

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  • Posted in thread: Miniature engine design on 01-12-2017 at 05:46 PM
    Hey Chris! How are you?This is a pretty interesting topic, i think. I can share some thoughts
    on the subject which may help you.Quick note: i`m a student of Mechanical Engineering and most
    of my backg...

  • Posted in thread: Bluing steel part. on 01-09-2017 at 09:47 PM
    Are you trying to blue tooling? if so cold bluing is a good option.Sure, it isn`t very durable
    but its good enough for tooling and seems to be what manufacturers use in most parts. Plus, if
    you keep y...

  • Posted in thread: PatRoVa Rotary Valve engine on 07-25-2016 at 03:32 PM
    Mr. Pattakos,thank you, that was a great response. you seem to have a pretty solid plan.with
    that in mind, if you ran all of the calculations, i think its time to build a prototype to test
    it out as y...

  • Posted in thread: PatRoVa Rotary Valve engine on 07-25-2016 at 03:42 AM
    I have a few issues with some things you said. mind that my background is in mechanical
    engineering and that i`m not criticizing the overall design but rather some rather flimsy
    conclusions you arrive...

  • Posted in thread: Drilling bronze valve cages. Not happy on 03-17-2014 at 02:30 AM
    Hi Todd,I've been collecting bits for a while now in order to make a tool & cutter grinder. In
    fact tomorrow I'm going to weld the motor mounting plate to the base plate. I'm using a
    universal motor s...

  • Posted in thread: Drilling bronze valve cages. Not happy on 03-16-2014 at 03:11 AM
    try a flat drill or a boring/facing bar, should work with less deflection.your problem here is
    either deflection of the drill , drill wander (very likely with twist drills), or work moving
    around in t...

  • Posted in thread: Machining a cylinder head on 12-13-2013 at 02:10 AM
    you can lower comp ratio back down shaving the combustion chamber all around, removing a little
    material at a time and checking the volume of the combustion chamber. this can also be done to
    get the c...

  • Posted in thread: Machining a cylinder head on 12-01-2013 at 10:33 PM
    you don't really lower the CC's of the engine, you just lower the CC's of the combustion
    chamber.the engine displacement is given by the stroke of the piston, and that is not changed
    unless you change...

  • Posted in thread: How to true the column of a Mill-Drill? on 11-30-2013 at 12:39 AM
    you could scrape it to fit or file to fit.how much is it deviating? how much material would you
    have to remove to make it square?that's some fairly involved work and not much people would
    care enough ...

  • Posted in thread: milling machine spindle on 11-27-2013 at 06:37 PM
    you can use 1045 for the spindle.needs to be ground and polished on the bearing fits.angular
    contact ball bearings will be more expensive than conical roller bearings and more difficult to
    find.howeve...

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