Type:

ESI-54

ESI-54-S

ESI-80/200

Rotor Dia. [m]

16.5

16.5

24.4

Rotor r.p.m.

77

90

60

Power [kW] *

50(NP75)

63(NP85)

200(NP275)

Power Regulation

Stall

Stall

-

Blade Make

Wood-Epoxy

Wood-Epoxy

Wood-Epoxy

Turbines produced

?

?

?

Downwind rotor with 2 blades of laminated wood/epoxy (Gougeon Brothers). Tip vanes for over-speed control.

A 20 kW Turbine was also fabricated.

* NP = Generator Name Plate.

Energy Sciences Incorporated (ESI) was located in Boulder, Colorado. Senior Engineer, Sandy (C.P.) Butterfield.

In 1994 the California Energy Commission reported a rest of 35 ESI Turbines Installed in California with a capacity of 1.8 MW ( average 51 kW)