Wakesurf Boards for Sale
It is currently Sun Dec 16, 2018 10:18 am

All times are UTC - 6 hours





Post new topic Reply to topic  [ 13 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: Rudder issue
PostPosted: Fri Aug 31, 2018 12:21 pm 
Offline
Site Admin
User avatar

Joined: Wed Apr 21, 2010 9:00 am
Posts: 1060
I have seen them fall out, knocked off but not sheer off like that.

Good call just buying the new one. Let your dealer handle the warranty and if it gets approved they can credit you back. If not at least you did not miss this entire time on the water.


Top
 Profile  
 
 Post subject: Re: Rudder issue
PostPosted: Mon Sep 24, 2018 8:35 pm 
Offline
Team Axis

Joined: Mon Dec 19, 2016 2:35 pm
Posts: 74
Location: Cincinnati, Ohio
The warranty got approved, but didn’t get an answer what the cause was. Not to worried since the boat handles again like new


Sent from my iPhone using Tapatalk

_________________
2017 A22
2000 Sunsetter Lxi


Top
 Profile  
 
 Post subject: Looks like High-Cycle-Fatigue
PostPosted: Tue Sep 25, 2018 2:36 pm 
Offline
Team Axis

Joined: Sat Jun 21, 2014 6:27 pm
Posts: 152
Location: Parker Strip, AZ
it looks like a classis example of a HCF failure. You have a sudden change in thickness to the shaft diameter, which causes a local concentration of the stresses, or "stress riser". The prop spins causing pulses of force every time the prop blades pass by. Assume 4 blades at 3000 RPM, that is 12,000 cycles per minute. Take the number of minutes of fun you have had and this could get into the millions of load cycles. Once the crack initiates, which could be from a metal defect, or a deep scratch, the force will be concentrated on the crack tip and it will slowly increase in depth. As the part deforms the crack growth rate increases.

Big round radii help to prevent this kind of thing by reducing available stress risers. This kind of failure of parts that spin, reciprocate, or are acted on by other parts that spin or reciprocate, is not uncommon and the reason that companies such as Magnaflux have done so well over the years.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ]  Go to page Previous  1, 2

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 16 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: