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

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #31  
Old 04-26-2012, 04:13 PM
TRBenj TRBenj is offline
MC Devotee
 
Join Date: Dec 2005
Boat: 1990 Ski Nautique
Location: NWCT
Posts: 1,146
Eric, the stainless prop pictured above is a 14x16 (Im sure thats what you meant), and I can definitely see the resemblance to the older 3-blade legend design. Your 12" 3-blades still work great on the smaller, lighter vintage CC's. No idea how old this one is, but the shape is pretty much the same.

I can see how thinner blades would make a prop faster (more efficient). I cant say Ive ever noticed any fatigue on any of my CNC props, but I guess we'll see how they stand up to the test of time! Luckily I dont run in a river or lake with any real debris concerns.

I cant say I agree with you on the last few hundred rpm's not adding any speed. I think I understand what youre saying though. The more wetted surface a hull has, the more RPM it takes to push it faster- especially at the high end... so youre getting less speed per extra rpm at the top than you do in the midrange. Still, to say that the last 300-400 rpm can return next to no measurable speed increase seems to be a real stretch. That has not been my experience with the brand X props.

I do realize that there are several parameters that are different in the 2 prop designs, which are not easily measured or communicated I dont have a understanding of how pitch distribution will affect performance, but I do recognize that aft rake will help top end speed by lifting the bow slightly. Whether or not the Acme design is a "work boat type prop" really doesnt matter much to me, I just want the best performance out of my non-100mph ski boats.
Attached Images
 
Reply With Quote
 

Tags
197, footer, footing, prop, prop 197, prop lq9, prop ly6, propeller

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 08:26 AM.