Ask a Naval Architect

Ask the Architect

Not sure you're getting the right answers from your local prop shop on what style or pitch propeller to use? Our Naval Architects have a minimum 20 years experience and a Master's Degree or better. We'll steer you in the right direction.

Q: What kind of information does your Naval Architect provide?

A: We provide a 4-page report detailing our findings and recommendations. We will compare the estimated performance of two different propeller sizes or styles if desired. A sample report can be found at the link below...

sample_marine_architect_report_timbolier.pdf
File Size:	992 kb
File Type:	pdf

Download File

Q: Why is your process better than calling any other prop manufacturer and asking for a sizing?

A: Two reasons: First, our Naval Architects are independent contractors and have NO CONTACT with our sales people. They have no incentive to steer you into a more expensive style or size. Secondly, Their decades of experience with the latest fluid-dynamics software enables them to better judge the various trade-offs of different designs without being influenced by marketing hype or sales goals.

Q: Sounds Expensive. How much does this service cost?

A: $129 gets you a thorough prop analysis by a Naval Architect. This amount is credited toward your next ZZ-Prop Purchase within 90 days..

Q: Do you offer Computational Fluid Dynamics (CFD) analysis?
A: Yes, But this requires considerably more information on your hull design and runs between $800 - $1200.

Naval Architect Propulsion Analysis Form

STEP 1: Complete the form below with information on your vessel and the propeller change you are considering.

* Indicates required field

Name *

First

Last

Address *

Line 1

Line 2

City

State

Zip Code

Country

Phone Number *

Email *

Vessel Year / Make / Model *

VESSEL INFORMATION

Vessel Name *

Length Over-All (LOA) *

Max Propeller Diameter *

Length at Water Line *

Deadrise Aft *

PROPULSION SYSTEM

Number of Engines *

Engine HP Rating *

Fuel Rate at WOT (GPH) *

Shaft Size *

Transmission Manufacturer *

DESIRED PROPELLER

Material *

Vessel Service (select from list) *

Hull Draft *

Beam at Water Line *

Desired Cruising Speed *

Engine Model # *

Engine RPM at Rated HP *

Design Power (%) *

Trans Gear Ratio *

Transmission Model *

Prop Style (select one) *

Hull Type (select from list) *

Fully Loaded Weight (lbs) *

Prop Center to waterline *

Expected Top Speed *

Engine Manufacturer *

Fuel Type *

Design RPM % *

Gear Type (select one) *

Propeller Style (select one) *

Preferred Diameter *

Objective -- Explain why new props are desired, and what you wish to accomplish in this exercise. *

Observed Performance Data (if available)

Vessel Weight (at trial) *

Different Engine and/or Gear? *

Propeller Model (at trial) *

Prop Pitch (at trial) *

Observed RPM #1 *

Observed RPM #2 *

Blade Area Ratio (at trial) *

Prop # of Blades (at trial) *

Observed Speed #1 *

Observed Speed #2 *

Prop Diameter (at trial) *

Cupping (at trial - select one) *

Submit

Ask the Architect

Naval Architect Propulsion Analysis Form

STEP 1: Complete the form below with information on your vessel and the propeller change you are considering.

STEP 2: Call us with your payment information at +1 410.317.4628 Option 3.