SailNet Community - View Single Post - is there a non impeller speed-log?
View Single Post
  #3  
Old 09-29-2006
Faster's Avatar
Faster Faster is online now
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,003
Thanks: 81
Thanked 223 Times in 215 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
You're right - I recall reading about such a system a few years back - but can't remember who offered it. Haven't seen anything about it lately so maybe it never caught on.
The main drawback may have been the need to lead a wire down the keel to one of the transducers. (in one version that I remember)

I think it used the doppler effect or transit-time ultrasonic technique, a common industrial flow measurement method. As a flow measurement it is a bit unreliable and subject to errors that may be why it hasn't caught on here.

Makes sense, though, to eliminate the moving parts, doesn't it?
Reply With Quote Share with Facebook