in reply to Low Quality Facts

Electric Carriage and Wagon Company had 14 cabs garaged on 39th St in NYC circa 1897 & working seven days each week. Using specially constructed garage cranes, slightly elevated auto rails, and removable vehicle trays, batteries could be swapped out by a single mechanic in just seventy-five seconds. Cruising at speeds of 10 to 20 mph, each taxicab covered some eleven city miles per day.

from Internal Combustion by Edwin Black

in reply to Low Quality Facts

@Low Quality Facts I just had to fact-check this, and actually I can confirm it's true.

2.6 (miles/kWh) * (2 Ah * 1.4 V) to feet ---> 38 ft + 5.2608 in

and that's with the average fuel economy of a modern car, so it's reasonable that older one did a bit worse.

(I've assumed just one AA battery, maybe they actually run on two or three, and had a much worse fuel economy?)

reshared this

in reply to Elena ``of Valhalla''

@valhalla
OK let's delve more into this.

Looking at

ev-database.org/cheatsheet/ene…

the average is 189 Wh/km, with a range of 135 to 294. The median seems to be 183.5 Wh/km.

In miles/kWh that would be a range of 2.11 to 4.6 miles/kWh with a median of 3.4 miles/kWh.

1/n

in reply to Oblomov

en.wikipedia.org/wiki/AA_batte… has some interesting stats on the capacity of AA batteries, that depends a lot on the actual type. It can be as low as 400 mAh and as high as 2.85 Ah. Interesting, the page also has a table with “max energy at nominal voltage and 50 mA drain”, ranging from 1.2 to 5.1 Wh for actual AA-batteries (not similar form factors but higher capacity or voltage).

2/n

Questa voce è stata modificata (1 giorno fa)
in reply to Oblomov

@valhalla now, our remaining conversion factor is miles/kWh to feet/Wh, which is 5.28.

So electric cars range from 11 ft/Wh to 24.29 ft/Wh with a median of 17.95 ft/Wh, with capacities ranging from 1.2 to 5.1 Wh.

The 30 feet per AA battery still checks out, even with current tech! The actual range these days seems to be something between 13 ft and 124 feet, with a median of ~54 ft per AA battery. Almost doubled since the first one ;-)

3/3

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