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  • wombat2go's Avatar
    Yesterday, 07:01 PM
    Water with air bubbles is not really "aerated". it is a 2 phase mixture ( liquid-gas) with a "void fraction" Eg water with 25% air bubbles would...
    43 replies | 1616 view(s)
  • wombat2go's Avatar
    06-18-2018, 10:14 AM
    In 1972 i made a CDI for a Mazda rotary engine. That engine was a 2-cycle with two rotors and a total of 6 combustion chambers. It had dual...
    39 replies | 2726 view(s)
  • wombat2go's Avatar
    06-16-2018, 01:41 PM
    But Young's Modulus and Poisson's ratio are about same as Al ? https://en.wikipedia.org/wiki/Scandium
    30 replies | 1808 view(s)
  • wombat2go's Avatar
    06-14-2018, 03:07 PM
    The primary purpose of case hardening automotive drive shafts is to put the hardened circumference of the shaft into compression, thereby greatly...
    83 replies | 9364 view(s)
  • wombat2go's Avatar
    06-14-2018, 09:32 AM
    wombat2go replied to a thread Slow Site Why? in General
    On the Android here: Firefox browser is working OK to this site. Firefox Focus ( The privacy browser ) was working on this site, but stopped...
    32 replies | 1223 view(s)
  • wombat2go's Avatar
    06-13-2018, 03:43 PM
    Firefox 60.0.2 for linux came last night. So far it is working correctly.
    15 replies | 636 view(s)
  • wombat2go's Avatar
    06-12-2018, 10:37 AM
    wombat2go replied to a thread Breakaway mechanism in General
    On bike ride a few days ago we came across a contractor trying to mow a lawn park area. He had a an array of about 5 decks driven by pto from a new...
    31 replies | 1338 view(s)
  • wombat2go's Avatar
    06-11-2018, 08:34 PM
    aquadag, marvellous stuff. Travelling around to forge shops in various countries we used to stay in above average hotels. The embarrasing time was...
    10 replies | 528 view(s)
  • wombat2go's Avatar
    06-11-2018, 07:43 PM
    The feed of hot billets to the press is mostly automated these days. There are accept/reject gates controlled by at least one optical pyrometer....
    10 replies | 528 view(s)
  • wombat2go's Avatar
    06-09-2018, 06:48 PM
    What part is it used on? I made a steerer tube last year. It was 1 inch by 24TPI 60 degree "core diameter" : 1.000 - ( .0222 * 2) = 0.9556
    46 replies | 3392 view(s)
  • wombat2go's Avatar
    06-09-2018, 11:39 AM
    wombat2go replied to a thread GFCI with 2 Pole 240-V in General
    Did you try JT post #34? For RF detection, I think there will need to be a partial discharge as a component of the 100 k Ohm leakage path you...
    73 replies | 2352 view(s)
  • wombat2go's Avatar
    06-09-2018, 10:31 AM
    wombat2go replied to a thread GFCI with 2 Pole 240-V in General
    My wife sells but does not rent, fault locators including the thumpers. I never used a thumper. One time I purchased from her a UHF arc detector...
    73 replies | 2352 view(s)
  • wombat2go's Avatar
    06-09-2018, 09:17 AM
    What is the dominant frequency of the noise? A 55 Hz noise might indicate imbalance or other problem on the shaft/worm. Higher pitch might be...
    16 replies | 736 view(s)
  • wombat2go's Avatar
    06-06-2018, 01:14 PM
    wombat2go replied to a thread GFCI with 2 Pole 240-V in General
    I probably used "relative" measurement and Low Ohms range on the shorted cable I recall doing a few measurement and pacing it out in both...
    73 replies | 2352 view(s)
  • wombat2go's Avatar
    06-06-2018, 12:33 PM
    wombat2go replied to a thread GFCI with 2 Pole 240-V in General
    My brother-in law was going to spend thousands getting a bulldozer in to replace his buried cable, a long run from off grid weekend house to Pelton...
    73 replies | 2352 view(s)
  • wombat2go's Avatar
    06-05-2018, 07:56 AM
    https://app.box.com/s/6slpwjdoyftte62ux9jnowet3ou96ort The trammel type camera lens wrench is not stiff against twisting. It is difficult to get...
    34 replies | 2015 view(s)
  • wombat2go's Avatar
    06-04-2018, 10:20 AM
    wombat2go replied to a thread Shop Made Tools in General
    I have a similar device to the one in Matt's photo. I found that the little black pointer was a reason for inaccuracy because it bears on the angled...
    3336 replies | 11107710 view(s)
  • wombat2go's Avatar
    06-03-2018, 11:18 AM
    Brian, I can't wait. "One test is worth a 1000 learned internet posts"
    36 replies | 2252 view(s)
  • wombat2go's Avatar
    06-03-2018, 11:14 AM
    wombat2go replied to a thread Battery tab welder in General
    In the resistance "spot" welding of automotive vehicle bodies, the term "contactor" was used for the original water cooled electromagnetic...
    34 replies | 1545 view(s)
  • wombat2go's Avatar
    06-01-2018, 02:09 PM
    wombat2go replied to a thread Nash/AMC Ambassador in General
    And in the Holly cards, the valve that opened up under wide open throttle to let more fuel guzzle into the jets was called an "Economizer" ( I used...
    61 replies | 2719 view(s)
  • wombat2go's Avatar
    06-01-2018, 11:29 AM
    wombat2go replied to a thread Nash/AMC Ambassador in General
    Hi Eddy, I enjoyed your post and understood it well. Those Ford panel vans of that era had a colloquial name that I would decline to mention,...
    61 replies | 2719 view(s)
  • wombat2go's Avatar
    06-01-2018, 09:48 AM
    Conditions in the fan ventilated basement here have risen to 19 C 66 F and 70% Humidity over past week. A cool change is predicted here today. I...
    20 replies | 911 view(s)
  • wombat2go's Avatar
    06-01-2018, 09:27 AM
    wombat2go replied to a thread Nash/AMC Ambassador in General
    AMC in Australia In 1960's Australian Motor Industries started assembling Ramblers from TKD kits exported from Wisconsin. My father and uncle were...
    61 replies | 2719 view(s)
  • wombat2go's Avatar
    05-31-2018, 12:28 PM
    wombat2go replied to a thread Nash/AMC Ambassador in General
    Hi Allen I was very interested to read what you are doing, thanks. I have a collection of Pentax-Ricoh 35mm K mount and I also use my vintage K...
    61 replies | 2719 view(s)
  • wombat2go's Avatar
    05-31-2018, 10:15 AM
    wombat2go replied to a thread Nash/AMC Ambassador in General
    Hi Allan, Sounds like a worthwhile project I would be interested to hear what cameras and film you are using indooors and outdoors. I have some...
    61 replies | 2719 view(s)
  • wombat2go's Avatar
    05-30-2018, 12:30 PM
    Back in the day when I was designing battery chargers, the Lead Acid was king and the battery hydrometer for specific gravity measurement was the...
    40 replies | 1419 view(s)
  • wombat2go's Avatar
    05-30-2018, 12:19 PM
    As I understand the jargon, Sealed Lead Acid (SLA) types are Gel Cell Absorbed Glass Mat and even flooded type I think can be sealed these days?...
    4 replies | 201 view(s)
  • wombat2go's Avatar
    05-28-2018, 11:17 AM
    wombat2go replied to a thread Epoxying aluminum in General
    Here is a comparison of Al -6061 with Loctite 648 and JB Weld ( data with the 648 and JB joining Aluminum: Order: 6061, 648, JB Shear strength :...
    34 replies | 1599 view(s)
  • wombat2go's Avatar
    05-27-2018, 04:42 PM
    wombat2go replied to a thread Epoxying aluminum in General
    Do you mean that a grub screw is installed across the joint in the tapped hole?
    34 replies | 1599 view(s)
  • wombat2go's Avatar
    05-27-2018, 02:45 PM
    wombat2go replied to a thread Hybrid arbor-pulley in General
    If you ever have to replace the bearing heads on your mower deck, inside the old one/s is a flanged shaft. It is of machinable steel so the flange...
    19 replies | 1273 view(s)
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