Kona Kai Notes
KONA KAI SPEED CHART
The speeds listed below are approximate and not guaranteed. They are based
on the listed displacement and may vary if displacement (weight) varies. All
speeds assume well-faired hulls driving through properly sized propellers with
suitable gearing to match the power and torque curves of the engine in
question. All speeds are in knots per hour. To convert to miles per hour,
divide by .87. Horsepower is given as constant 24-hour rated SHAFT HORSEPOWER
(SHP); NOT brake horsepower (BHP), nor intermittent ratings. If only BHP is
known, multiply this figure by .70 for approximate constant SHP. Figures assume
S.A.E. methods. If ratings given in D.I.N., these will be about 8% less than
S.A.E. If ratings given in KW, this will give ratings about 75% of BHP (S.A.E.)
ratings. In all cases, it makes no difference if the engine is diesel or
gasoline powered.
| 24' 6" x 20' x 5110 lbs. (2.28
tons) |
| 45 shp |
14 knots |
| 62 shp |
15.5 knots |
| 80 shp |
18 knots |
| 125 shp |
22.5 knots |
| 180 shp |
27 knots |
| 250 shp |
31 knots |
| 320 shp |
35.5 knots |
| 400 shp |
40 knots |
| 500 shp |
44.5 knots |
Outboard Motorwell option, description from plans
- Use twin motors only, at least 50 hp each. See Sheet 2 of 5 for transom
cut-out.
- Build up transom thickness to suit motor clamps. (See motor manual)
- Inboard motor stringers may be omitted, but not 2" x 4" vertical
uprights on transom.
- Span forward 3/8" PW bulkhead to aft side of side frame members under
sole.
- Make motorwell watertight with respect to bilge spaces & self-draining
via drain holes through transom.
- Adhere to motor installation specifications supplied by motor
manufacturer.
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