Reply
 
Thread Tools Search this Thread
 
Old 08 October 2015, 08:11   #1
Member
 
Todd Grimley's Avatar
 
Country: Australia
Town: S/E Queensland
Boat name: White Hurricane
Make: Zodiac Hurricane
Length: 7m +
Engine: Yanmar 6LP 315hp Jet
Join Date: Apr 2012
Posts: 74
HELP Volvo duo prop recommendations!

I have a 7.3 m hurricane with a AD41-P 200hp to a tail shaft drive DP-E 290 duo prop, with 1:1.78 gear ratio in top gear box and lower leg gears. I have A4 props on it.
Boat weighs about 2150 kg.
it does 34 knots WOT at 3150 rpm! Motor max revs is about 3800 rpm.
So should I try different props or think about changing lower leg gears to 1:1.95?
Is anyone familiar with this set up.?
.
__________________

__________________
Todd Grimley is offline   Reply With Quote
Old 08 October 2015, 18:12   #2
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Quote:
Originally Posted by Todd Grimley View Post
I have a 7.3 m hurricane with a AD41-P 200hp to a tail shaft drive DP-E 290 duo prop, with 1:1.78 gear ratio in top gear box and lower leg gears. I have A4 props on it.
Boat weighs about 2150 kg.
it does 34 knots WOT at 3150 rpm! Motor max revs is about 3800 rpm.
So should I try different props or think about changing lower leg gears to 1:1.95?
Is anyone familiar with this set up.?
.
You can do either of these, prop change is usually cheaper. If you get to the end of prop pitch availability you can then change the lower section of the drive leg if you still require lower gearing.

However, whilst I prefer lower pitch props because I consider them more use for general boating, if your aim is to gain maximum speed, higher pitch props will me more efficient at higher speed.
__________________
JW.
jwalker is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:22.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.