Propeller Analysis Form

Propeller Selection Analysis Form
Name _________________________
Company_______________________
Address________________________
______________________________
Phone__________ Fax____________
E-mail_________________________

INSTRUCTIONS

YOU MUST ENTER THE INFORMATION
BELOW COMPLETELY BEFORE WE CAN
BEGIN TO ASSESS YOUR SITUATION.
Where options are given, check those that
apply.

1a. OBJECTIVES (NEW BUILD)

Primary goal
        [ ] Top speed________________
        [ ] Towpull (thrust)____________

Tasks
        [ ] Recommend a new propeller from:
        __________ (preferred manufacturer)
        [ ] Recommend a gear ratio from the
              following:
        ________________ (available ratios)

1b. OBJECTIVES (REPOWER/REPROP)

Primary goal
        [ ] Increase speed_______________
        [ ] Towpull (thrust)_______________
        [ ] Improved RPM
        [ ] Less cavitation, noise vibration

Tasks
        [ ] Check if a propeller repair or repitch
              is possible
        [ ] Recommend a new propeller from:
              _________ (preferred manufacturer)
        [ ] Recommend a gear ratio from the
              following:
              ________________ (available ratios)

Describe symptoms and additional info:
        ________________________________
        ________________________________
        ________________________________
        ________________________________
        ________________________________

2. PRINCIPLE VESSEL CONDITION

All calculations will be based on this data, so this
should reflect the principle operating condition of
the vessel. If possible, attach a sketch or photograph of the vessel.

Vessel make _________________________
Hull type
        [ ] Displacement               [ ] Barge
        [ ] Semi-displacement____ [ ] Sailboat
        [ ] Planing                         [ ] Catamaran
Service
        [ ] Passenger/Pleasure_____ [ ] Towing
        [ ] Work/Commercial_____   [ ] Bollard
Usage
        [ ] Offshore (ocean)           [ ] Lakes/bays

Length __________ [ ] Waterline   [ ] Overall
Weight __________ [ ] Light   [ ] Operational
Number of propellers
        [ ] Single                          [ ] Twin

3. STERN GEOMETRY

Maximum propeller diameter ______________
Propeller tip clearance to hull ______________
Distance of prop centerline below water surface
_______________

4. ENGINE/GEAR

Engine model _________________________
Rated power ___________ Rated RPM _____
If installed: Gear model _____________ Ratio

5. PRIOR PERFORMANCE
Information about prior trial performance of the vessel (or one exactly like it) will improve the accuracy and reliability of the analysis. Define this data as accurately as possible - do not guess. This data should be for typical operation at the vessel condition described above.

Location of trial _________________________
Trial speed ___ [ ] GPS [ ] Loran [ ] Distance/time

Engine model ___________________________
Rated power ____________ Rated RPM _____
Engine RPM at trial speed _________________

Propeller model _________________________
Diameter ___________ Pitch ___________ Cup
Blades __________ Propeller tip clearance to hull
Material
[ ] Mn Bronze [ ] Stainless
[ ] NiBrAl [ ] Other ________

Please fill out this form and send as an attachment to your e-mail, or fax it to
Henry H. Smith and Company
Toll Free Phone: 800-338-8900
Fax: 810-794-1120
E-Mail: henry4222@sbcglobal.net