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    Mystery tool

    Specially for steamchick:
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    Electronic glo-plug ignition?

    There's nothing especially original about this proposal-this is what aeromodellers and boat modellers have been using to start their glowplug engines for about the past 50 years...certainly since the 1970s-when electric starters became more the form of the near ubiquitous 'power...
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    WTB cox .049

    OK-perhaps I should clarify slightly-not that it affects your proposed purchase. Cox International is Canadian based...some 10+ years ago they bought the remaining Cox engine parts from Estes (the model rocket people) in Colorado who at that time owned Cox Hobbies. Since then they have not only...
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    WTB cox .049

    Well go to Cox International-they have all the Cox spares currently available across the entire Cox engine range-and can certainly sort you out for 049 piston cylinder units. ChrisM
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    ML Midge Build

    Jack I wasn't aware-but my response above was just responding to the daily digest I get which shows new daily posts-I must confess I didn't check the date of the preceding post-(your post #135) relative to the last post #136 when I replied.....obviously I should have! That being said, designer...
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    ML Midge Build

    Your Midge is running under-compressed and quite rich-you need to wind the compression screw in further still yet. All these model diesels have a sweet spot of about 1/8" turn (it depends a bit on how fine or coarse the comp screw thread is) for any particular prop load-at which the engine will...
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    Model Aircraft Engine Refurb

    Quite right too-methyl ether is the formula you state....but there are a whole range of ethers-and for the purposes of model diesels there is only one that works-good old diethyl ether-formerly used as an anaesthetic-but also widely used still as a solvent in organic chemistry and in some...
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    Model Aircraft Engine Refurb

    Gents-the compound in question is di-ETHYL ether, not di-methyl ether or ethe- methyl ether or any other ether you stumble across, nor 'petroleum ether' nor 'crown ether' either......if our Dutch resident friend above was trying to use dimethyl ether he would have been in for some technical...
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    Model Aircraft Engine Refurb

    Only if your head is fixed....;-(
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    Model Aircraft Engine Refurb

    I would take some of those alternatives-with a large tablespoon of salt.....remember model 'diesels' have been around since 1930-90 years-and in all that time no better substitute has been found for diethyl ether-simply (and now wearing my chemistry PhD hat) because there is no other organic...
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    Model Aircraft Engine Refurb

    Talk to your local C/L club-they're normally still big users of diesel-and usually have some arrangements for either selling fuel in quantity or have legitimate access to the ingredients and will generally sell to bona fide modellers.
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    Model Aircraft Engine Refurb

    Indeed-when I was a junior modeller in the early 70s we could buy Shell 'Racing Spirit' from certain garages in Dunedin, where I grew up-and this was the cheapest source of methanol for mixing glow fuel in those days-it was coloured purple-just like methylated spirits-and you could buy it in a 5...
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    Model Aircraft Engine Refurb

    In fact this is 100% true-and you can easily demonstrate it-the proviso being that you use 'normal' castor oil that has not been chemically modified after extraction-some of the 'modified' castors will mix to a degree..but returning to the point at hand-if you mix castor and kerosene, you can...
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    reamed hole vs. drill rod size

    Micromark does a set of these 'over and under' reamers-look up item #84753 on their website....covers the range 1/8"-1/2" in 1/16" steps
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    New 2.5 cc Model Diesel design and build.

    Ed-as per my reply on 'another' forum-put me down for one of each-the Buddy and the ED Baby (and should you be tempted to do another run of David Owen 'Mate' BB case castings-one of them as well..!
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    MP5 Glow engine

    Will you be posting the plans/drawings at any stage? Chris M 'ffkiwi'
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    My first IC engines

    The Mark Lubbock 'Midge' is a 0.5cc/0.8cc simple sideport barstock diesel that featured in 'Aviation Modeller International' in 1997 in the April and June issues.....quite a number have been made over the years: you can find more information here in the 'projects' section...
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    Piston vs Cylinder wall.

    The US made McCoy 9 glow engine of 1950 had a bore of 0.5" and was ringed in the earlier models (the later variants used a lapped piston)-here's a link to the test on the original model personally I'd say it is a lot of trouble to go...
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    off topic but questions about battery plates materials

    Wearing my chemist's hat this time-'oil of vitriol' is an old fashioned name for sulphuric acid-so some common salts of suphuric acid were knwn as 'xyz vitriol' or by the colour-in this casev copper sulphate is a bright blue-so 'blue vitriol'. There are all sorts of quaint names out there...