Pictured here is
the American Turbine jet with our easy access jet guard/swim grid. This design allows the
operator easier access to the jet while the boat is in the water.
Here's some interesting information regarding this jet from American Turbine
Performance Test Data. A static flow test
was conducted at American Turbine Pump Company to compare pumping efficiencies of the
American Turbine vs. the Berkeley impeller and bowl. The pumping test pit equipment
utilized Halliburton flow meters, met the standards set by the Bureau of Reclamations and
outputted data to a computer for increased accuracy. The impellers used in the test were
Berkeley's "A2" and American Turbine's "AA". Bowls and impellers were
factory direct, off-the-shelf items.
The results are given in the following table. They show that
at any given horsepower, the American Turbine impeller and bowl flowed more gallons per
minute and produced a higher bowl discharge pressure than Berkeley's.
| H.P |
GALLONS PER MINUTE |
BOWL P.S.I |
|
American |
Berkeley |
American |
Berkeley |
| 250 |
3,503 |
3,494 |
93.4 |
90.8 |
| 275 |
3,617 |
3,605 |
99.5 |
96.6 |
| 300 |
3,722 |
3,708 |
105.3 |
102.1 |
| 325 |
3,824 |
3,811 |
111.1 |
107.8 |
| 350 |
3,921 |
3,905 |
116.8 |
113.0 |
| 375 |
4,009 |
3,995 |
122.1 |
118.4 |
| 400 |
4,098 |
4,08 |
127.5 |
123.5 |
| 425 |
4,182 |
4,167 |
132.8 |
128.7 |
| 450 |
4,262 |
4,248 |
137.9 |
133.8 |
In short, Same Horsepower:
More Pressure, More Water
The Kodiak 3-stage jet (discontinued Hamilton 3-stage) now
built by KEM Equipment, Inc., in Tualatin, Oregon is excellent for low speed
manoeuverability. It uses volume instead of pressure to make the pump work The multiple
impeller units move a greater volume of water under increased pressure. More volume with
greater pressure means more weight can be carried in the boat or the boat can be larger.
(Marine Jet Drive Manual, Seloc Pub.) |
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