Prefoil Testing

Smooth Water RPM - MPH Testing

Test Date: 8/30/2008

Flat Sea

RPM MPH
4000 40.4
4500 45.7
5000 53.8
5500 59.9
5800 65.1
Pilot
Charles Coles, Jr
Passengers
Mike
Fuel
1/2 Tank.
Waves
Low tide; slack; 0.5 ft waves
This flat water trial attempted to find the optimal trim-tab and engine adjustments for peak performance in a pre-foil state at higher speeds.
Test Date: 8/29/2008

Flat Sea

RPM MPH
3000 22.;6
3500 35.2
4000 40.8
4500 47.3
5000 52.7
5500 61.3
5800 65.0
Pilot
Charles Coles, Jr
Passengers
Mike
Fuel
1/2 Tank.
Wind
Light & variable;
Waves
flat, slack tide
This flat water trial attempted to find the optimal trim-tab and engine adjustments for peak performance in a pre-foil state.
Test Date: 8/27/2008

Following Sea

RPM MPH
4500 45.7
5000 55.4
5800 --

Head Sea

RPM MPH
4500 --
5000 54.5
5800 65.0
Pilot
Charles Coles, Jr
Passengers
Tim Jackson, Mike
Fuel
5/8 Tank.
Wind
8–10 knots due N; 0.5 to 1 ft waves
Top RPM recorded a highest speed of 65.3 MPH.
Test Date: 8/15/2008

Following Sea

RPMMPH
3000 -
3500 33.1
4000 39.4
4500 47.9
5000* 55.6

Head Sea

RPMMPH
3000 22.7
3500 33.5
4000 39.7
4500 42.1
5000* 54.3
Pilot
Charles Coles, Jr
Passengers
Tim Jackson, Geoffrey Jackson
Loaded Craft Weight
6520 Lbs.
Wind
Light and variable, 2–5 knots
* RPMs above 5000 were not tested as a result of a subjective evaluation of crew safety, in which the presence of a minor child was a factor.

Comments:
This video shows a pre-foil test run early in the season.

Wave Height: about 6"–2'

Date: 5/25/2008     
Location: West Falmouth

Conditions: Choppy

Comments:
This video shows a pre-foil test run
early in the season.

Wave Height: about 4"-6"
Course Description:Leave harbor into head sea

Test Date: 5/26/2008     Time: N/R
Location: West Falmouth

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