Go Back  Offshoreonly.com > Technical > Prop Talk
16.5 x 36 Hering 18 degree >

16.5 x 36 Hering 18 degree

Like Tree0Likes

16.5 x 36 Hering 18 degree

Reply

Old 05-17-2019, 04:27 PM
  #1
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2003
Location: Lafayette,La
My Boat: 31 IMP CC Mercury Bulldog/SSM V
Posts: 5,695
Default 16.5 x 36 Hering 18 degree

Going with a single SSM V on my 31 IMP CC. Power is a Merc Bulldog 540. No box , or pad...yet. What will it take power wise to swing this prop?.
open87 is offline  
Reply With Quote
Old 05-17-2019, 04:50 PM
  #2
Registered
 
Join Date: Oct 2012
My Boat: 280 Velocity
Posts: 1,181
Default

What prop, there are many
underpsi68 is offline  
Reply With Quote
Old 05-17-2019, 09:47 PM
  #3
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2003
Location: Lafayette,La
My Boat: 31 IMP CC Mercury Bulldog/SSM V
Posts: 5,695
Default

open87 is offline  
Reply With Quote
Old 05-17-2019, 10:08 PM
  #4
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2003
Location: Lafayette,La
My Boat: 31 IMP CC Mercury Bulldog/SSM V
Posts: 5,695
Default

5 blade.

Trying to educate myself on props since buying the V drive . Don't think it's ever been done on a straight bottom v hull non stepped. with a single engine. There are a few with a single VI drive , Phantom has a 34 with a V but it's on a box and that is not a hull to really compare. It's all I really have information wise. The Checkmate with the VI and a 3 blade made and what I assume was a lengthy process of trial /error. A few of the others (Activators)had 4 and 5 blades.

These 2 props are available at a reasonable price. , one is a Mercury and the other is a Hering. Both are the same size 16.5 x 36 18 degree rake .


I figure I can have them dropped down to low 30's if need be ??.. or do I need to be on the search for 17 /17.5 's.


I Don't know propeller dynamics AT ALL..
open87 is offline  
Reply With Quote
Old 05-18-2019, 10:00 AM
  #5
Platinum Member
Platinum Member
 
27daytona's Avatar
 
Join Date: Apr 2001
Location: antelope,california
My Boat: 2000 Talon 37 Former Out of Bounds
Posts: 605
Default

You can't drop the pitch into the low 30s. I would borrow a prop and find out where you need to be before making a purchase. Doug
27daytona is offline  
Reply With Quote
Old 05-24-2019, 08:46 AM
  #6
Registered
 
Join Date: Mar 2016
Location: Rockford, Michigan
My Boat: 25 Daytona
Posts: 23
Default

Your running A single LH? Im running a small cat with a #6 1200hp on it and it takes some pretty big power to pull a 36 with 1.34 gears.
Ult680 is offline  
Reply With Quote
Old 05-24-2019, 09:22 AM
  #7
VIP Member
VIP Member
 
Join Date: Nov 2002
Location: ankeny,ia.
Posts: 3,673
Default

What is the drive gearing?....if this is a stock mercury bulldog, this will be way to much prop
JaayTeee is online now  
Reply With Quote
Old 05-25-2019, 08:26 AM
  #8
Registered
Thread Starter
iTrader: (1)
 
Join Date: Feb 2003
Location: Lafayette,La
My Boat: 31 IMP CC Mercury Bulldog/SSM V
Posts: 5,695
Default

Drive is a 1.48 gear.

Yes , stock Bulldog . Has 165 hours on it. Going to have Precision Marine tune on dyno.. If there is anything he can do to increase the torque and just keep it all motor I will see . I am not looking to break records , looking have a good cruise speed 50-70 mph.





Any help/advice is appreciated .



Again, I do not understand prop dynamics at all with SSM drives.
open87 is offline  
Reply With Quote
Old 05-25-2019, 08:51 AM
  #9
VIP Member
VIP Member
 
Join Date: Nov 2002
Location: ankeny,ia.
Posts: 3,673
Default

I’m thinking you’ll want to be mid 20’s on pitch
JaayTeee is online now  
Reply With Quote
Old 05-25-2019, 08:57 AM
  #10
Platinum Member
Platinum Member
 
27daytona's Avatar
 
Join Date: Apr 2001
Location: antelope,california
My Boat: 2000 Talon 37 Former Out of Bounds
Posts: 605
Default

Get the motor in the boat. Borrow a prop and go from there. I have found that a pitch and diameter that should not work in theory was the best prop. Testing is key.
27daytona is offline  
Reply With Quote

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser