Posted by Bob M on November 02, 2011 at 20:07:35 from (69.207.87.100):
In Reply to: electrall question posted by Charlie M on November 02, 2011 at 18:04:37:
Others posters' reasons for the Electrall's failure in the market are all valid. Here are couple more (again strictly opinion):
- Cost. The Electrall generator and motor(s) would not have been cheap. (Check the current price on a 20 HP, 3 phase electric motor vs the cost of a PTO shaft).
- Safety. An Electrall's 208 volts is safe when the generator, motor and interconnecting wiring (cables) are new. However as insulation deteriorates, the equipment becomes dirty/wet, etc. a lethal shock hazard can develop.
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A somewhat analogous situation existed in the late 1950's when LeTourneau/Westinghouse tried to market a diesel/electric elevating scraper (earthmover). The machine used electric motors instead of mechanical and hydraulic drives.
The design worked well on paper. However in the field the scraper was a colossal failure.
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