new fans for window defogging

Hydraulicjump

Well-known member
Joined
Feb 10, 2011
Messages
646
Fluid Motion Model
C-30 CB
Hull Identification Number
FMLT2911F415
Non-Fluid Motion Model
Necky Looksha VII, Liquidlogic Remix, Jackson 4Fun
Vessel Name
La Barka (2015)
Windscreen fogging is a perennial problem with the RTs. On our 29CB the three fans are pretty useless if it is a damp, cold day and we have been inside the cabin for a bit, raising the humidity and temperature. So like many of you, I use at least one small oscillating 12v fan and direct it at the windscreen to supplement the wimpy factory fans. That and crawling up and clumsily applying an occasional squeegee, revealing my complete lack of grace and agility.

Part of the reason that the three fans that RT installed are so ineffective is that they are trying to draw air from a small, enclosed space. A fan like that needs a clear area behind it to maximize airflow. They are literally trying to suck air out of a small box.

So I am ordering a couple of Caframo Bora fans, with the intention of of just mounting them on top of the existing fans and borrowing the 12v electrical. I haven't quite decided whether I will make a teak insert into the existing fan box (if you are wondering what I am talking about, just pop the grate off) to mount the fan on. More likely, I will just make a 1/2 inch teak cover for fan box and mount the fan to that.

The advantage of this is that I can fold the fan flat when not in use and rotate it to cool myself on a hot day. Whenever a "hot day" comes again to the PNW.

Anyone done this already?
 
On a smaller scale yes! Pictures of defogging fans mounted on my R-21 are in my photo album. They work great and can be turned 360 to cool on a hot day. Bob
 
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