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Pictorial Glossary
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The
V Dive Gearbox.
As this image clearly shows, the top driven shaft and
the bottom output shaft. These are fitted with gears
that may drive the propellor faster, slower or at the
same speed as the engine.
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Propellor
These come in 2, 3, 4 or more blade design. They all
have one purpose, to push the water back and drive the
boat forward. What propellor is best for any particular
application is a matter of wide speculation. Once a
racer finds a propellor that suits his boat he treats
it better than his wife.
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The Drag Boat,
is a boat designed like their land bound cousins to accelerate
from idle to a point 1/4 mile away in the quickest possible
time Originating in the USA in the late 1950's
Drag boats have similar classes to circuit racing with many
circuit displacement boats also competing in drag events.
Circuit hydroplanes are not suited to drag boat racing, and
drag hydros have almost nothing in common with circuit hydroplanes.
Outboards also compete, to our knowledge there are no dedicated
drag outboards in Australia, and these are circuit boats having
a go.
Flatbottoms
The fastest displacement type boats, are just that flat on
the bottom, unlike circuit boats that have a modest V bottom
Hydros Are
usually imported from the USA and are much narrower than their
circuit namesakes. The propellor is up under the boat and
does not protrude out the back like circuit hydros. Like circuit
hydros these also ride on 3 points, the tip of each sponson
and the propellor
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Outboard Boat Types
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A Drag Hydroin full flight
This one isn, and it comes from NSW. |
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A Flatbotton Boat at Speed
This one is Brian McCoskers Liberty, one of the winningest booats in Australia, and he comes from Tamworth in NSW |
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A Drag Hydro leaving the line
This can sometimes be a very dramatic event |
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