Hiller / Bell 47 Turbine Helicopter Technical Specifications and

Turbine conversion information for
Hiller 12 E and Bell 47 Helicopters
Hiller / Bell 47 Turbine Helicopter
Technical Specifications and Performance Estimates
Principal Specifica tions Hiller/ Bell 47
With the Allison 250 C20B Turbine Engi ne
empty weight
maximum gross weight
useful load
engine rated max shp
engine derat ed to
% of engine potential used
power to weight ratio
service ceiling (ft )
hover ceiling @ 3200 lbs
in ground effect
out of ground effect
hover ceiling @ 2950 lbs
in ground effect
out of ground effect
rate of climb
maximum vertical
Maximum
Vne (mph)
maximum cruise (mph)
Fuel (gal)
Standard tanks
t otal with auxiliary tanks
endurance @ 90 mph
to empty
standard fuel
with auxiliary fuel
range @ 90 mph
to empty
standard fuel
with auxiliary fuel
Cargo Hook/External Load
600 Series Transmission
900 Series Transmission
1650
1650
2950
3200
1300
1550
420 shaft horse power
261
270
61.9%
64.2%
.09 hp/ lb
.08 hp/ lb
16,000
16,000
N/A
N/A
14,200
8,000
16,000
13,800
16,000
13,800
970
1,250
105
100
970
1,250
105
100
57
96
57
96
2.56 hours
4 hours
214 miles
360 miles
1,000 pounds
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