Gori 3-Blade
Folding Propeller |
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This folding propeller marks a technological and
functional leap forward in the development of propellers for sailboats
with large engine power. It is now possible for these sailboats and
motor sailors to gain the folding propeller's speed advantages under
sail, combined with the fixed propeller's thrust capability when
motoring.
The 3-blade Gori folding propeller was introduced on the market in 1994
and won the DAME award and HISWA award the same year, as the best new
marine product. |
"Overdrive" function
The 3 blade Gori folding propeller's "overdrive" function adds a
new dimension to sailing under power. The helmsman can choose the
propeller pitch and profile in the water while sailing forward, by
regulating the yacht's shift and throttle control. Without the use of
vulnerable hydraulics or complicated mechanical devices. The "overdrive"
is used when motorsailing in fair weather or when using the engine under
sail. The "overdrive" gives the same speed at lower rpms. The result is
less engine noise, less vibration and better fuel economy. The function
is simple. Eg when changing from "overdrive" to normal drive the shift
and throttle control is set in neutral, which allows the propeller to
fold. Then the shift and throttle control is set in forward again. The
propeller itself adds a new dimension to sailing under power. Qualities
that are unique to the 3 blade Gori folding propeller.
Full speed under sail
Folding propellers have been reserved for small or medium size sailboats
with moderate engine power. They have been able to obtain, under sail,
the extra speed the folding propeller allows with the minimum drag. The
3-blade Gori folding propeller brings these advantages within the reach
of larger sailboats and motor sailors. The extra speed under sail is
substantial.
The design prevents seaweed etc fouling on the propeller. A further
potential for optimum speed. Tests by major yachting magazines have
shown that the 3-blade Gori folding propeller has a much lower drag than
any other well-known 3-blade sailboat propeller, no matter if it is a
folding propeller or a feathering propeller.
Effective for engines from 10hp to 300hp (7 - 221kW)
The propeller revolution for larger sailboats and motorsailers is
emphasized by the fact that this propeller can be used for boats fitted
with engines from approximately 10hp (7kW) and up to approximatley 300hp
(221kW), and the power transfer is on the whole the same as for fixed
3-blade propellers. The design of the Gori propeller results in minimum
noise and vibration, which is often a problem for the well-known types
of feathering propellers. This propeller is offered in diameters from
15" and up to 30". Tests by major yachting magazines have shown that the
3-blade Gori folding propeller has a much better efficiency both forward
(+11%) and reverse (+6,5%) than a feathering propeller..
Professional quality
Gori propeller has for more than 20 years been leading the field in
development of folding propellers. The 3-blade Gori folding propeller
underlines Gori propeller's technological leading position, which is
protested by patents pending. The 2-blade Gori folding propellers have
for over 20 years proved their superiority and quality. They have been a
natural choice for boats exposed to the most intense strains, for
example during the Whitbread Round the World Race. The 3-blade Gori
folding propeller is manufactured in the same professional quality,
where every single propeller has its own number and a "logbook" during
production. Each propeller is balanced dynamically.
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