Quest Notes
Quest Speed/Power Chart (*)
The speeds listed are approximate and considered accurate
based upon the listed displacement. Changes in displacement
(weight) will modify these figures. All speeds are listed in
KNOTS PER HOUR. To convert to miles per hour, divide by .87.
Horsepower is listed in SHAFT HORSEPOWER (SHP). If a gasoline
motor is being used, it may be rated as BRAKE HORSEPOWER
(BHP). If so, multiply the BHP by .75 in order to determine
the approximate SHP. When powering with a diesel motor, use
the CONSTANT rating rather than the INTERMITTENT rating for
SHP. The listing shows total horsepower required. When using
twin engines, add the SHP of both engines.
|
SPEED
|
HP
|
|
13 knots
|
42 SHP
|
|
15.5 knots
|
58 SHP
|
|
18 knots
|
75 SHP
|
|
20 knots
|
95 SHP
|
|
22.5 knots
|
120 SHP
|
|
27 knots
|
165 SHP
|
|
31.5 knots
|
225 SHP
|
|
35 knots
|
300 SHP
|
|
(*) Shaft horsepower ratings (SHP) assume proper
propeller and gear reductions. Additional power may be
required to maintain a given speed if compromises are
made in propeller size or reduction gear.
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