myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website myHanse.com - Hanse Yacht Owners Website

Welcome to myHanse.com the forum for Hanse Yachts owners throughout the world.

Forum Home Forum Home > Hints and Tips > 505
  New Posts New Posts RSS Feed - Engine performance
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Engine performance

 Post Reply Post Reply
Author
Message
colinc View Drop Down
Lieutenant
Lieutenant
Avatar

Joined: 08 May 2019
Location: UK
Status: Offline
Points: 48
Post Options Post Options   Thanks (0) Thanks(0)   Quote colinc Quote  Post ReplyReply Direct Link To This Post Topic: Engine performance
    Posted: 09 November 2019 at 10:03
What is your cruising RPM and speed in calm/no tide conditions?  Also what is your max RPM?  And if you know, what size and pitch of prop do you have?

We have the Volvo D2 75 on our 505.   I suspect she is rather over propped as we can only get to 2,400 RPM on full throttle (should be able to get to 3,000).   We cruise at 7kn (just) at 1,900 RPM.   Any higher revs get us going a bit faster but the engine seems very strained - probably due to the over propping.   This is a Flexofold 20" diameter 14" pitch 3 blade.

Would be grateful to confirm this by comparing to other owners, please.

PS I know this depends on type of prop too, however I think prop size and pitch is just as important as prop type - if not more so.  Nigel Calder's testing and writing is pretty good on that. https://www.mysailing.com.au/gear/folding-prop-gear-test


Edited by colinc - 09 November 2019 at 12:10
Back to Top
kipwrite View Drop Down
Captain
Captain


Joined: 14 October 2015
Location: New York
Status: Online
Points: 165
Post Options Post Options   Thanks (0) Thanks(0)   Quote kipwrite Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2019 at 14:34
We have a d2-75F engine with the flex o fold 3 blade prop. Not sure of diameter and pitch. 

With the bottom clean, RPMs max out around 2750, and she will do 7.5 kts at 2000 rpms. If I run the RPMs up, she will get to 8+ kts. 

We generally cruise between 1800-2100 RPMs, the lower side giving us much greater range on passages, while still maintaining 7kts (if things are settled). 
Kipwrite
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.047 seconds.

Links : www.hanseyachts.co.uk www.hanseyachts.com www.fjordboats.co.uk www.dehler.co.uk www.varianta.co.uk