Go Back  Offshoreonly.com > Technical > General Q & A
Speedmaster prop question >

Speedmaster prop question

Notices

Speedmaster prop question

Old 08-29-2013, 06:57 AM
  #1  
Registered
Thread Starter
 
bigboat28's Avatar
 
Join Date: Dec 2004
Location: Ohio
Posts: 4,017
Received 103 Likes on 75 Posts
Default Speedmaster prop question

Which prop would I get more rpm out of: a 15 3/8 X 26 4 blade 6" hub or a 16.5 X 27 3 blade also 6" hub? Typically how much does each inch of diameter and each degree of pitch change the rpm?
bigboat28 is offline  
Old 08-29-2013, 05:35 PM
  #2  
Registered
iTrader: (3)
 
Join Date: Jul 2004
Location: chicago
Posts: 11,332
Received 71 Likes on 39 Posts
Default

You should get more RPM out of the 15 3/8x26. Each 1'' of diameter, or 1'' of pitch, or extra blade is around 150-200rpm. Since that 16.5x27 is 1'' more pitch, 1'' more diameter, but 1 less blade, i'd say the rpm should be within 150-200 of each other.
MILD THUNDER is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.