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Showing content with the highest reputation on 10/23/2022 in all areas

  1. If you want to run a fan from battery, something such as this would be ideal. https://gpelectric.com/products/1500-watt-industrial-pure-sine-wave-inverter/ It will follow the normal rules of any transformer-like device. With 12V input and 120V output, it has a 10:1 ratio. In other words, the voltage is multiplied by 10 as viewed going from the battery to the load; and the current is multiplied by 10 as viewed from the load to the battery. Watts of real-power will remain the same, minus the 5% efficiency loss. So, a resistive load such as a light bulb which draws 1 amp at 120V from the inverter will cause the inverter to draw 10 amps at 12V from the battery; plus efficiency losses. A 10 amp resistive load such as a coffee maker requires 100 amps from the battery, plus efficiency losses. AC Motor loads (even series / universal motors) have an inductive nature which can damage cheap inverters, but works well with pure-sine inverters. To predict the battery current demand for a motor through an inverter, you need to know the watts of power demand for the motor. Then use the formula: ([Motor Power] / [battery Volts]) / [Inverter efficiency] = [Battery Amps] Motor Power is Watts as measured by a watt-meter which is aware of power factor; such as a Kill-A-Watt meter. This is not amps nor VA; and one cannot measure volts and amps separately to calculate this with an AC motor of any type. Inverter Efficiency is per-unit efficiency. If the inverter claims a 95% efficiency that is 0.95 per-unit. Per-unit (PU) is simply percent divided by 100. PU is "per one" whereas percent is "per 100." PU a common unit of measurement with electrical parameters. Most of the vintage tabletop fans use less than 100W, often a lot less. If your fan uses 40W of power, and your inverter is powered by a 12V battery, you can use the formula as follows: 40 W Power (measured with Kill-A-Watt) 0.95 Efficiency (from inverter documentation) 12V Battery (nominal battery voltage) (40/12)/0.95=3.51 Therefore, to run a fan requiring 40W from a 95% efficient inverter from a 12V battery, the battery will have to supply about 3.5 amps. For a 100W fan, you would be using about 8.8 A from the battery. If you have a fully charged 100AH 12V deep-cycle battery, it can supply 5A for 20 hours, based on the normal way they are rated. The higher the rate of discharge the less of the energy you recover from the battery, but if you stay within the current range for a 10 to 20 hour discharge, they reasonably hold true to the following formula: Run Time = (battery capacity) divided by (battery current) For the two examples of fans above, the 100AH 12V battery would support the fan as follows... 100 AH battery 40W fan 12V battery 95% efficient inverter 100/((40/12)/0.95)=28 hours 100 AH battery 100W fan 12V battery 95% efficient inverter 100/((100/12)/0.95)=11 hours (or slightly less because this is a higher rate of discharge than the 20 hour rate upon which the battery is rated) These numbers are just approximations, but they are probably "in the ballpark" for for not having actual equipment to test. Hope y'all found this interesting! 🙂
    2 points
  2. Depends on how bad they are scratched up. If it really scratched you have to wet sand first 600grit to 3500. Then I wheel buff it with brown tripoli, green, red rouge. I finish with mothers mag or Simichrome and then hand buff with flitz faucet wax.
    2 points
  3. In a nutshell, if you want chrome like luster, a buffing wheel is a must.
    1 point
  4. Definitely a rebadged Phil Rich near the end of their reign. I have (had) two Montgomery Wards with ribbed blades. One was given to Jay Bernard, still have the other one.
    1 point
  5. 1. Pedestal fans were offered from the factory not as a dealer installed option. It would have been a lot of work to covert one. 2. I believe the first pedestal fan was the Sliver Swan around 1937. 3. I don't think there where choices for the base or any aftermarket bases were offered. 4. There were not any big motor 6 blade fans offered as a pedestal fan. Emerson did make large commercial pedestal fans; I think they were made mostly in the 1950s and 1960s.
    1 point
  6. I can’t figure out the date on this beautiful piece of machinery. I also don’t understand why is this thing so small for 2kw? If anyone has a catalog pic of heaters made by ilg plz send em.
    1 point
  7. I don't know anything about basketball, but that fan came out nice.
    1 point
  8. I don't see these fans all that much. The last flea market I went to had two of them. The one I passed up was 89 asking but I am sure I could have gotten it for 65 or so. Here are the finished pics of the fan. I put felt in the top and bottom channel to give it a quiet and smooth sound when pulling out the doors.
    1 point
  9. I would love to put the same color combination on this 5" Gilbert frankenfan.
    1 point
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