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 > 320
  New Posts New Posts RSS Feed - Folding prop on 320?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Folding prop on 320?

 Post Reply Post Reply Page  <123>
Author
Message
Andre View Drop Down
Sub Lieutenant
Sub Lieutenant


Joined: 26 March 2017
Location: The Netherlands
Status: Offline
Points: 7
Post Options Post Options   Thanks (0) Thanks(0)   Quote Andre Quote  Post ReplyReply Direct Link To This Post Posted: 12 July 2018 at 19:16
Should try it again, but can remember that at full throttle made a 7.2 knots.
And at 2800 rpm reach easily 6.3 knots, more or less comparable with the fixed prop.
Only noted that with fixed prop max. motor rpm was 3600 and with the folding one 3800, which is slightly overspeeding for the 3YM20.
Who is the dealer you are referring to?
Don't follow his arguments. Look around, you will  hardly find 32 ft boats with 3-blade folding props under it.
Mine was calculated, recommended and offered by Flexofold factory, which should have quite some commercial interest in offering the much more expensive 3-blade one, but didn't.
Back to Top
Merinalle View Drop Down
Captain
Captain
Avatar

Joined: 16 January 2007
Location: Finland
Status: Offline
Points: 196
Post Options Post Options   Thanks (0) Thanks(0)   Quote Merinalle Quote  Post ReplyReply Direct Link To This Post Posted: 13 July 2018 at 04:35
We have the 3-plade Flexofold, and the speed/RPM -numbers are quite similar Andre mentioned.
320#166
Back to Top
aquilo View Drop Down
Lieutenant Commander
Lieutenant Commander


Joined: 09 September 2008
Status: Offline
Points: 69
Post Options Post Options   Thanks (0) Thanks(0)   Quote aquilo Quote  Post ReplyReply Direct Link To This Post Posted: 13 July 2018 at 09:06
I've not noticed any decrease in max speed, but I seldom run the engine at max rpm, don't think that's healthy for it. What I noticed is that I got improved speed performance at lower rpm compared to the fixed. I think the top speed is appr. the same.



Edited by aquilo - 13 July 2018 at 09:09
Hanse 320
Norway
Back to Top
Brufan View Drop Down
Commadore
Commadore
Avatar

Joined: 16 December 2010
Location: Belgium
Status: Offline
Points: 464
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brufan Quote  Post ReplyReply Direct Link To This Post Posted: 13 July 2018 at 13:07
On my H355, same speed with original vs FoF 2 blades prop except that now engine runs 3-400 rpm lower at same speed.
Reverse gear is as efficient as with orignal fixed prop.  Just anticipate 1 or 2 second when reversing.

Bruno

hanse 355 - 57

S/Y Spicy Ginger

White hull, 2 cabins, Volvo D1-30, Selden rig, removable mainsheet track system (modifications done now), Simrad-Jefa autopilot.
Back to Top
Andre View Drop Down
Sub Lieutenant
Sub Lieutenant


Joined: 26 March 2017
Location: The Netherlands
Status: Offline
Points: 7
Post Options Post Options   Thanks (0) Thanks(0)   Quote Andre Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2018 at 20:36
Checked today. 
No wind, flat water, no tide/current, so water speed = ground speed.
At 2800 rpm, 6.3 knots, at 3600 rpm, 7.3 knots.
Back to Top
mystudio View Drop Down
Lieutenant
Lieutenant
Avatar

Joined: 17 April 2018
Location: NL
Status: Offline
Points: 43
Post Options Post Options   Thanks (0) Thanks(0)   Quote mystudio Quote  Post ReplyReply Direct Link To This Post Posted: 19 July 2018 at 08:40
Will check it today on my boat with the Original fixed prop, but I think it's more or less the same. So, I don't see any reason to go for the 3-blade anymore and assume the shipard is wrong on this one. Thx all for the input! 
Hanse 320|#004|Jefa steering |Jefa DD1 drive|Raymarine EV-2 with P70|Raymarine E7 |B&G Triton1 Multi displays|Lewmar size 2 traveller|Dyneema|Flexofold|
Back to Top
mystudio View Drop Down
Lieutenant
Lieutenant
Avatar

Joined: 17 April 2018
Location: NL
Status: Offline
Points: 43
Post Options Post Options   Thanks (0) Thanks(0)   Quote mystudio Quote  Post ReplyReply Direct Link To This Post Posted: 02 September 2018 at 19:13
Ordered and received my prop, curious! Very heavy, by the way. 

Checked my boatspeeds on flat water with the old propellor, here is my 'old' tab:

2000 5,4
2400 6,2
2800 6,7
3000 6,9
3200 7,0
3400 7,2

More or less the same as the experiences here. Will do the same test with the new propellor. 

Hanse 320|#004|Jefa steering |Jefa DD1 drive|Raymarine EV-2 with P70|Raymarine E7 |B&G Triton1 Multi displays|Lewmar size 2 traveller|Dyneema|Flexofold|
Back to Top
mystudio View Drop Down
Lieutenant
Lieutenant
Avatar

Joined: 17 April 2018
Location: NL
Status: Offline
Points: 43
Post Options Post Options   Thanks (0) Thanks(0)   Quote mystudio Quote  Post ReplyReply Direct Link To This Post Posted: 10 September 2018 at 19:59
One consideration. Andre, don't you think the prop is quite heavy? Did not weight it yet, but, it's heavy! Asking myself if this is okay for the bearings in the saildrive….will ask Flexofold too for there experiences. 
Hanse 320|#004|Jefa steering |Jefa DD1 drive|Raymarine EV-2 with P70|Raymarine E7 |B&G Triton1 Multi displays|Lewmar size 2 traveller|Dyneema|Flexofold|
Back to Top
Brufan View Drop Down
Commadore
Commadore
Avatar

Joined: 16 December 2010
Location: Belgium
Status: Offline
Points: 464
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brufan Quote  Post ReplyReply Direct Link To This Post Posted: 11 September 2018 at 10:00
Unitl now : no problem with SD bearings (approx 550 running hours with it).
Yes FoF is heavy.  But other folding or feathring propelers are also heavy.
Bruno

hanse 355 - 57

S/Y Spicy Ginger

White hull, 2 cabins, Volvo D1-30, Selden rig, removable mainsheet track system (modifications done now), Simrad-Jefa autopilot.
Back to Top
Andre View Drop Down
Sub Lieutenant
Sub Lieutenant


Joined: 26 March 2017
Location: The Netherlands
Status: Offline
Points: 7
Post Options Post Options   Thanks (0) Thanks(0)   Quote Andre Quote  Post ReplyReply Direct Link To This Post Posted: 11 September 2018 at 21:24
Prop is heavy indeed, I was also impressed by its weight, but it will be a bit lighter under water (Archimedes). Expect the thrust force of the prop will be considerably higher than the radial force by its weight, bearings should easily withstand the weight of the prop. As Bruno also notes about all folding props are in alu-bronze, weights will not be much different between brands and a 3-blade version will even be heavier. Only folding prop that will be considerably lighter I believe will be the same Flexofold with the composite hub construction, which is about Euro 100 more expensive.
Wouldn't worry about the  prop weight, enjoy the better sailing performance instead!
Back to Top
 Post Reply Post Reply Page  <123>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.04
Copyright ©2001-2015 Web Wiz Ltd.

This page was generated in 0.039 seconds.

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