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  1. S

    Turning piston undersize above top ring

    Ta. I'm not technical on cooling of mixtures. Just had to be sure the statistical distribution of the mixtures in cars being shipped was as narrow as possible, with 99.997% of product leaving the factory within spec. I.E. a minimum 50% mix meant fill average mix was around 54% Glycol. (Zero cars...
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    Turning piston undersize above top ring

    Factory fill was 50% glycol. But I had an idea that was enriched to 65% by Finnish dealers at PDI. Not sure. When it is cold here it is maybe -2 ~ -4°C. But when it is hot we get an exciting 22 °C! Lovely and stable in N.E. England. Why live anywhere else? K2
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    Turning piston undersize above top ring

    Hi A Joe, I am. Most manufacturers do different things to limit cost, where the part of the market "outside limits" can be managed separately. But an engine for a common European production car is likely to be designed to wider limits, but only sold to function within the limits in the Sales...
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    3” boiler project.

    Hi Doug, I have been working to improve my understanding and calculations relating to the strength of boilers. There seems to be a big gap in the papers I have researched that no-one has checked things like flue tubes in compression, yet the way they are situated in boilers means they must be...
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    Turning piston undersize above top ring

    Hi Guys, For what it is worth.. Experience with Production car engines led me to work with Hepworth and Grandage (Piston makers) in the late 1980s. Of course there is a world of difference between the super-high precision (in design and development as well as manufacturing) of car engine pistons...
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    Model generator build from scratch

    Sorry, I don't mean to upset you, but I picked up odd threads at different times. When I get time I'll study it all. K2
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    Model generator build from scratch

    Hi Luke, Maybe you can post your calculations? I am without all the dimensions to do any myself. I'm trying to resolve what I remember from Maxwell 40 years ago with what you are achieving. But I'll admit I haven't done the calculations since about 40 years ago, so may have got things mixed-up...
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    Model generator build from scratch

    You are correct: But the magnetic flux in the iron "focused" generator is 10 ~100 times bigger than the flux in air. It's a thing called Magnetic permeability. A bit like carbon and clay in a pencil lead can conduct electricity ...,. but copper, aluminium and silver just do it so much better...
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    Model generator build from scratch

    Series coils are needed on "slow" generators to add the coil voltages to get the usable total voltage. But limited by wire size for current. Where a generator is driven "fast enough" to achieve output voltage at a useful engine speed, coils are connected in parallel to increase the current...
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    Model generator build from scratch

    For spell-check's Na2 read N52 - which is what I typed.
  11. S

    Model generator build from scratch

    Thanks -the Na2 is the useful bit. I shall be ordering different dimensions anyway. Cheers! K2
  12. S

    Model generator build from scratch

    Crazy computer! It has just changed your post #62 by adding a paragraph about Iron and added post #63! I flippin give-up.... K2
  13. S

    Model generator build from scratch

    On Magnets, All I have seen is "Ive now got some bigger magnets to try also these are 25x10x3 and much much more powerfull and also cheeper!" Maybe you have an ebay reference number? I have bought too many things and got the wrong ones because I wasn't so specific on E&@y. The supplier and a...
  14. S

    Model generator build from scratch

    Please can you post details of magnets - plus supplier? I am sure I am not the only curious watcher here. K2
  15. S

    Model generator build from scratch

    Hi Luke, looks good! It generates volts. But the real test is a plot of volts against amps - say at set speeds. 200rpm, 400rpm 600rpm, 800 rpm 1000rpm. For generator analysis you can not rely upon just volts. Really that is just a speed relationship as it is dB/dt. (B = Magnetic flux intensity)...
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    Experimental Flash Steam and others

    Hi Richard, I guess the left-handed monkeys are 1/4 of the monkey population if normal genetics apply to sinistral beasts? Obviously then they are harder to find than the right-handed critturs. But finding the appropriate LH wrench is great! Must be worth a fortune for the rarity value! I would...
  17. S

    Youngster's simple electric motor

    Nicely made Jason. The double solenoid motor in the video looks like it runs on 5V. DC.? What current does it draw? When I read the description of a solenoid motor, I expected an armature drawn into the solenoid, not just drawn to the end. I guess that the energy transfer of magnetic field...
  18. S

    3” boiler project.

    Beautiful finish! Enjoy steaming! K2
  19. S

    Advice on a boiler burner

    HMEL (n' all). Re: Posts #36 and Mr. Heslop's post #38. I have been studying the ASME codes a bit, regards the Hydrostatic test pressure: Just so you have it in "black and white". I am using a paper by Kozo Hiaoka - who directly quotes the various ASME regulations: Section VIII "Pressure...
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    3” boiler project.

    Oh, just another idea... domed ends are much stronger than flat, as your copper is quite thin, and I am sure you can make domed ends by spinning? Spherical or elliptical. K2
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