Switching to a Three Blade Prop - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Boat Builders Row > Pacific Seacraft
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 03-28-2009
Junior Member
 
Join Date: Nov 2008
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Redfish is on a distinguished road
Switching to a Three Blade Prop

I have decided to switch to a three blade fixed prop from a two blade fixed prop for better performance while motoring. My Pacific Seacraft manual recomends a 17 x 10 three blade prop and I believe it is a right (not left) prop.

My questions:

1. Has anyone used a different prop (fixed), diameter or pitch, from the one PSC recommends?

2. Is it a right hand prop? I just want to be sure.

3. Other than MI Wheel, does anyone have recomendations of prop manufactures? I AM ONLY INTERESTED IN FIXED PROPS.

Thanks,

John L.

s/v Redfish
1988 PSC 34 #95
Reply With Quote Share with Facebook
  #2  
Old 03-29-2009
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,421
Thanks: 6
Thanked 14 Times in 14 Posts
Rep Power: 15
sailingfool will become famous soon enough
You might want to look into the rationale for any performance improvement from a three blade versus a two blade, assuming both are properly sized. If a two blade fits in your setup, simplying switching to a three will not have any particular benefit other than reducing your boat cash stadh.
__________________
Certified...in several regards...
Reply With Quote Share with Facebook
  #3  
Old 03-29-2009
Senior Member
 
Join Date: Jan 2007
Location: The house is in Kingsport, TN. Boats are on Watauga Lake and in New Bern, NC
Posts: 162
Thanks: 0
Thanked 13 Times in 11 Posts
Rep Power: 8
wsmurdoch is on a distinguished road
My spare prop is marked AUSTRA 17R. My Yamnar Operation Manual in the specifications says, "Direction of rotation, Propeller shaft (Ahead), Clockwise viewed from the stern".

Bill Murdoch
1988 PSC 34
PCS34118G888
Reply With Quote Share with Facebook
  #4  
Old 03-30-2009
lsbrodsky's Avatar
Senior Member
 
Join Date: Jul 2000
Location: New Bern, NC
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
lsbrodsky is on a distinguished road
I agree with Sailingfool. I ran a two blade on Asylum the whole time I owned her and compared results with folks with 3 blade props. I got all of the performance I needed from 2 blades. It seems that there would have been marginal improvement in performance under power in reverse, but that was never a big issue. With a two blade the boat would drive to hull speed and power through any weather. If you felt you needed a folding prop I could understand, although i was always a proponent of fixed blades and no moving parts.
Larry
Reply With Quote Share with Facebook
  #5  
Old 03-30-2009
Junior Member
 
Join Date: Jul 2007
Posts: 24
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
Pegasus34 is on a distinguished road
When we purchased our PSC 34 a couple of years ago, it was equipped with a 3 blade Maxprop and we had a spare 17 x 10 RH 3 blade fixed prop. The Maxprop was set to 17 x 10 and we were not able to get the proper RPM's from our Yanmar, and we had a problem with overheating.
Last spring we reset the Maxprop to an 8 inch pitch and the RPM's are now good and no more overheating.
I can't tell you how the fixed 3 blade 17 x 10 prop will work for you, but the Maxprop set to 17 x 10 was too much pitch.
Steve S.
Reply With Quote Share with Facebook
  #6  
Old 03-30-2009
Junior Member
 
Join Date: Feb 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
tedwright is on a distinguished road
Steve, I don't have enough posts to send you a PM. Would you be interested in selling your old fixed 3 blade 17x10 prop? I am in desperate need of one.


Thanks
Reply With Quote Share with Facebook
  #7  
Old 03-31-2009
Senior Member
 
Join Date: Oct 2001
Posts: 167
Thanks: 0
Thanked 7 Times in 6 Posts
Rep Power: 13
niftynickers is on a distinguished road
When I repowered NiftyNickers (Beta 37 1/2 hp) I also switched to a 3 blade Sailor Prop from Campbell.Its a bit strange looking shape wise but it does put the power into pushing the boat and doesnt affect sailing at all.I know that it delivers more thrust than the 2 blade by the way the boat blasts thru headseas and she sails as fast as ever.
Good luck,
Dianne and Chuck Burke S/V NiftyNickers
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
3 blade prop question. baboon Gear & Maintenance 12 11-30-2008 09:37 PM
2 Blade vs 3 Blade prop PBzeer Gear & Maintenance 23 01-02-2007 09:43 PM
Three Blade Prop KenD Gear & Maintenance 4 10-21-2003 06:39 PM
Choosing the Right Propeller Sue & Larry Gear and Maintenance Articles 0 02-04-2003 07:00 PM
three blade prop KenD General Discussion (sailing related) 8 06-18-2002 02:23 PM


All times are GMT -4. The time now is 09:42 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012