Electrall system

Charlie M · Dec 14, 2016

Curious why the IH electrall (maybe not spelled correct) system didn't catch on. Was there just not enough implements available to make it worthwhile?

Brendon-KS · Dec 14, 2016

I don't know this for sure but can imagine that the system was very costly. It was intended as a replacement for the PTO shaft by powering implements electrically but the required big motors and generators must have been expensive. Plus, having a generator hanging off the side of the tractor would have made visibility when cultivating (a primary use for the Farmall tractor) more difficult. In the end it probably just made more sense to have a dedicated unit for farmyard power-generating needs and run the implements with the PTO.

Bob M · Dec 14, 2016

In addition to the likely high cost, another disadvantage is the Electrall's limited power handling capacity.

The Electrall rated output is 10 KW. Means it can deliver a maximum of only about 13 HP to a powered equipment. Compare this to the PTO on a typical Electrall-equipped tractor (like a 450.) Here the PTO can deliver about 53 HP to a powered implement when needed.

For an implement subject to slugging/brief overloads like a baler, this difference is major.

Janicholson · Dec 14, 2016

The comments made already are accurate. The technology of the late 50s was not very efficient. I imagine the power in, power applied ratio was less than 50%. The solid state controls and alternator based designs with permanent magnets in them and the motors would have made the difference. When we get 50% better battery energy density we will see a resurgence in interest in this type of drive. Jim

leon · Dec 15, 2016

When IH run the idea of the "ELECTRALL" up the flag pole, had the whole industry joined in saluting, they would probably be in wide use my all manufacturers today. But for many good reasons that didn't happen and the rest of the manufactures shot at the idea instead of saluting.

However, we might want to get prepared for electric ground drives in tractors in the not too distant future, especially as tractors go to higher and higher power and even perhaps to more than two drive axles. Remember that railroad locomotives use electric drive!

Janicholson · Dec 15, 2016

In order not to forget, the all electric drive systems in Marion and Bucyrus Erie Electric walking dragline cranes. Jim

Bob M · Dec 15, 2016

FWIW LeTourneau and Westinghouse partnered to create a diesel-electric elevating scraper in the late 50's or early 60's. The diesel engine drove a large DC generator. Generator output then powered the scraper's drive wheels, soil elevator flights and I believe the cutting edge depth control and ejector.

I saw one only once. The machine spent more time being worked on by mechanics and electricians than actually moving earth.

A good idea in theory, but not with the electric drive technology then available.

DonO-MN · Dec 15, 2016

Retail price for the tractor mounted electrall generator was $867. A pricing option for a $3000 tractor!

jeffcat · Dec 15, 2016

As most everyone has told, the efficiency was jusr not there. There is nothing like straight PTO power to get the job done. Remember battery or extension cord lawn mowers from years ago? Please! Even your old 9 volt cordless drill??!! The unit hanging on the side of a 450 was the most assume standby farm thing you could want short of a minny nuclear power plant. Understand that hydraulic was up and comming back the. Today with the hydraulic pumps and motors there is almost nothing you can't do hands down

Electrall system

Charlie M

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Brendon-KS

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Bob M

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Janicholson

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leon

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Janicholson

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Bob M

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DonO-MN

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jeffcat

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