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Loading — Subpart C
Category Three: Boats Rated for Manual
Propulsion and Boats Rated for Outboard Motors of 2 Horsepower
or Less
Example of Calculations for Maximum Weight
Capacity and Persones Capacity: Boats Rated for Manual Propulsion
and Boats for 2 Horsepower or Less (Category Three)
For the purpose of this example we will assume
a 14.5 ft. rowboat that has a transom capable of receiving
an engine. The manufacturer has certified the boat for 2 HP.
In section 4.0, we discussed the methods to
calculate maximum displacement. The assumed boat has a classic
up-turned sheer and is sold as a rowing or low power outboard
engine boat. The preferred methods to use in figuring displacement
would be the immersion method or measuring a hull or mold
and following Simpson’s Rule. We assume this has been
done. Following are the specifications:
| Length
overall: |
14.5
ft. |
| Calculation
length: |
14 ft., 2 in. |
| Beam: |
5.75
ft. |
| Calculation
beam: |
5.5 ft. |
| Boat
weight: |
600
lb. |
| Outboard
engine: |
2 HP |
| Engine
weight: |
25
lb. |
| Fuel
tank: |
built-in the engine |
We have established the static float plane as
explained before. We have measured the hull either by the
boat immersion method or by applying Simpson’s Rule,
and have calculated a cubic capacity of 45 cubic ft. We now
follow the steps to calculate maximum weight capacity according
to 33 CFR 183.37.
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