Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #1  
Old 02-13-2012, 01:05 AM
Miss Rita's Avatar
Miss Rita Miss Rita is offline
MC Fanatic
 
Join Date: Jul 2009
Boat: 1992 ProStar 205, 1991 Ski Pro
Location: Black Hills
Posts: 851
cupped props

Even though it's the middle of snow skiing season for me, water skiing isn't that far off.

I know what a cupped prop is, but what does it mean when the cup is described as "0.09", "0.11", or "0.12"? Enquiring minds need to know.
Reply With Quote
  #2  
Old 02-14-2012, 10:58 PM
Jeff Lyman's Avatar
Jeff Lyman Jeff Lyman is offline
TT Enthusiast
 
Join Date: Sep 2006
Boat: 93 Mastercraft Prostar 205, 351HO
Location: Northeast
Posts: 257
I should know this but dont. I would guess the higher the number the more cup in the prop. The cup is at the leading edges or tip of the prop and always progessive. More cup produces more forward thrust and "bite" in the water as the prop spins. Over cupping thus lowers rpm's and inturn at some point will lower speed. There's a fine edge to this science of how far to go before it's to much. I've had many props recupped up an down but never remember discussing numbers like those, but always to dial in rpm's.
__________________
Mastercraft 93 ProStar 205, 351 HO, Syracuse N.Y.
Chris Craft 1954 Custom Deluxe 17, Chrysler 6 inboard
Best: 5 @ 28 off @ 31mph on a Connely F1X new for 2012 Radar Vice 68 with Vector double boots
Reply With Quote
  #3  
Old 02-14-2012, 10:59 PM
Jeff Lyman's Avatar
Jeff Lyman Jeff Lyman is offline
TT Enthusiast
 
Join Date: Sep 2006
Boat: 93 Mastercraft Prostar 205, 351HO
Location: Northeast
Posts: 257
Lucky you have snow to ski!!!
__________________
Mastercraft 93 ProStar 205, 351 HO, Syracuse N.Y.
Chris Craft 1954 Custom Deluxe 17, Chrysler 6 inboard
Best: 5 @ 28 off @ 31mph on a Connely F1X new for 2012 Radar Vice 68 with Vector double boots
Reply With Quote
Reply

Thread Tools
Display Modes

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


All times are GMT -4. The time now is 10:39 PM.