The C-Brats Forum Index
HomeForumsMy TopicsCalendarEvent SignupsMemberlistOur C-DorysThe Brat MapPhotos

Ventilation

 
Post new topic   Reply to topic    The C-Brats Forum Index -> Electrical and Wiring
View previous topic :: View next topic  
Author Message
MOOSE



Joined: 07 Nov 2003
Posts: 619
City/Region: Rainy Lake - Int'l. Falls
State or Province: MN
C-Dory Year: 2001
C-Dory Model: 22 Cruiser
Vessel Name: MOOSE
Photos: MOOSE
PostPosted: Wed Dec 31, 2003 2:34 pm    Post subject: Ventilation Reply with quote

Having just installed a Power Tower to elevate the radome on our 22' cruiser, I find I now have an extra 7/8" hole in my cabin roof where the radar cable formerly ran. My choices seem to be to patch the hole or take advantage of it by installing yet another piece of equipment. (what kind of decision is that?) Have any of you folks installed a solar or 12V vent, like one of the Nicro models, and if so, do you find it of value? Any other ideas for use of the hole would be welcomed as well; it's about 6-8" aft of the Power Tower.
TX
Al
Back to top
View user's profile Send private message
Chuck S



Joined: 01 Nov 2003
Posts: 309
City/Region: Cleveland
State or Province: OH
C-Dory Year: 2003
C-Dory Model: 16 Cruiser
Vessel Name: Amelia Anne
Photos: Amelia Anne
PostPosted: Wed Dec 31, 2003 2:51 pm    Post subject: Reply with quote

My J/24 and San Juan 28 racing sailboats all had Nicro solar vents on them as well as passive vents. Kept the moisture level inside down to below mildew levels. No reason they'd be different on a motor boat.

-- Chuck
Back to top
View user's profile Send private message Send e-mail
Redƒox
Guest





PostPosted: Thu Jan 01, 2004 2:11 pm    Post subject: ventilator! Reply with quote

Razz Well, heeeeeeeell yes!!

I've had one of those "Solar-Nicros" for years now and would-not go-without one. My "thinking" was to have a nice-smelling boat (to-come-back-to) after having to "lock-her-up" when visiting harbor-towns.... (You-know) when the sun is out and heats your interior of your boat --due to all those windows!
Only thing I have to do to it is keep some grease around the mating surfaces to better seal the thing. Mine will drip slowly, if I do not. I do that so I can remove it, if need-be.
Ok that's all your getting from me.... **poof** I'm out....... Moon
Back to top
Sea Angel



Joined: 29 Dec 2003
Posts: 734
City/Region: Virginia Beach, VA
State or Province: VA
Photos: Sea Angel
PostPosted: Wed Apr 06, 2005 10:23 pm    Post subject: 2 Speed DC Fan setup Reply with quote

Hi All;
This thread seems to lend itself to a project I am working on for Sea Angel and hope to install this weekend at the marina.

While on the Ches. Bay a couple weekends ago I traveled through a cold front that caused all the windows to severely fog up. It was a very short period, but it got me to thinking about ventilation and defogging. If I had a fan that I could direct on the inside windows... clear view, but do I need the full speed and noise?

Boater's World had some 12VDC oscillating fans on sale for <$20.00. I bought 2 and modified one to confirm the practical fit for the test.

I mounted 6 diodes in series and a miniature switch just above the main power switch to the fan motor. The 2nd switch is wired across the diodes. When the 2nd switch is 'ON'/'HIGH', the diodes are shorted;i.e., taken out of the circuit, and the fan runs at full speed. When the 2nd switch is 'OFF'/ 'OPEN'/'LOW', the fan runs at reduced speed. At full speed the fan draws abt 1.5amps and at low speed it draws abt 5/8 amp. 6 diodes appeared to be the physical size limit I could place in the fan base, along with the available switch. These diodes are heat shrink insulated in 2 groups of 3, folded back against itself and all 6 are then heat shrunk again, leaving 2 leads out to attach to the 2nd switch terminals. This 2nd switch is wired in series between the fan power switch and the fan motor's positive power lead.

From the electrical side, each diode [1000V PIV, 2.5amp; p/n: RO-170] will drop abt 0.6VDC across it. I will try to cram 8 diodes in the next base to slow the fan speed even more and reduce the voltage by another 1.2VDC to the fan motor. The advantage of the diodes is the lack of heat generated and space required. A suitable resistor would be too big and create too much heat.

If you are not familiar with the diodes, rectifiers, they look like miniature cylinders with a wire coming out of each end. They will have a colored single band on one end. This end will be towards the return/ ground side of the fan's power leads.. You will solder each diode in line with the 'band' end soldered to the 'non-band' of the next diode. This places them in series so each diode will perform a 0.6VDC reduction of voltage available to the motor load, thus reducing the source by 3.6VDC. So with a 14VDC source, the fan will only see 10.4VDC with the 6 diodes installed in line.

Sorry for the wordiness, but I hope this helps and not confuse.

I can make a VIDCAD drawing of this if anyone wants , but I hope this will give you some ideas on how to exploit the little things around the 'RADIO SHACK' parts bins.

73s

_________________
Art ka1rx
CBRAT #208
2005 CD25 #075 SEA ANGEL (SOLD)
USCGAUX (RET), USN(RET)
Broadcast TV ENG(RET)
ka1rx@verizon.net
SKYPE: Art.Bartlett4
Back to top
View user's profile Send private message Send e-mail
B~C



Joined: 31 Oct 2003
Posts: 2858
City/Region: Bend
State or Province: OR
C-Dory Year: 1999
C-Dory Model: 22 Cruiser
Vessel Name: Blue~C
Photos: Blue~C
PostPosted: Wed Apr 06, 2005 10:51 pm    Post subject: Reply with quote

the fan set up sounds like neat thing.
Slam in a solar vent it would be a perfect use for that now open wound in the roof. Like RF says it helps keep the smell factor down when the boat is stored. It also kind of helps brighten things up ...kind of like one of those solar tubes in a house. I stuck one behind the radom and love it..here's a pic http://www.c-brats.com/modules.php?set_albumName=Cabin,Interior&id=insul1&op=modload&name=gallery&file=index&include=view_photo.php

_________________
Ken
1999 22' boaterhome
Back to top
View user's profile Send private message Send e-mail
Work Release



Joined: 31 Jan 2004
Posts: 90
City/Region: Everett, Wa.
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Work Release
Photos: Work Release
PostPosted: Wed Apr 06, 2005 11:53 pm    Post subject: ventilation Reply with quote

Ken,
How well does the solar vent work for the fogging problems. I have a fan up front but unless I have the middle window cracked the fogging can still be a problem.
Jim, Work Release
Back to top
View user's profile Send private message Send e-mail
B~C



Joined: 31 Oct 2003
Posts: 2858
City/Region: Bend
State or Province: OR
C-Dory Year: 1999
C-Dory Model: 22 Cruiser
Vessel Name: Blue~C
Photos: Blue~C
PostPosted: Thu Apr 07, 2005 1:30 pm    Post subject: Reply with quote

I can't help but think the roof vent helps, as well as my little plexiglass window wingthings but I stiil have to give it the "fog gone" treatment and pack a small squege.
Those window wings are handy as snot, I can run with the windows open a bit and not get sprayed in a cross wind. I can also leave the windows open a bit when it's parked and not worry about rain getting in...cheap, easy, must have in my book...pic-
http://www.c-brats.com/modules.php?set_albumName=Blue~C&id=windowventB&op=modload&name=gallery&file=index&include=view_photo.php
Back to top
View user's profile Send private message Send e-mail
Sea Angel



Joined: 29 Dec 2003
Posts: 734
City/Region: Virginia Beach, VA
State or Province: VA
Photos: Sea Angel
PostPosted: Sat Apr 09, 2005 8:08 pm    Post subject: Reply with quote

I installed the fan today. I ran power from the Cabin Lites switch. It proved to work better than I thought it would. I mounted it to the overhead shelf with the base against the forward mounting screw to the roof safety handle that suspends the shelf.

73s
Back to top
View user's profile Send private message Send e-mail
C-WEED



Joined: 14 Mar 2004
Posts: 338
City/Region: New Brockton
State or Province: AL
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: C-Weed
Photos: C-WEED
PostPosted: Thu Apr 14, 2005 10:53 am    Post subject: Reply with quote

Moose: The only other use I can think of for that hole would be one of those twist grip operated spot lights that you see on the side of police cars. They make a roof mount version for big trucks/snow blowers/military/fire trucks and such that mount up thru the roof. The control handle is at a different angle. The on/off, fold lens down to stow position, swivle up/down and 360* swivel is all controled thru the handle grip. If that wouldn't give it the tugboat/workboat look I don't know what would. No fancy electric motor to go bad like those expensive remote jobs.
_________________
Chris
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    The C-Brats Forum Index -> Electrical and Wiring All times are GMT - 5 Hours
Page 1 of 1

 
     Jump to:  
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 vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum



Page generation time: 0.0835s (PHP: 81% - SQL: 19%) - SQL queries: 26 - GZIP disabled - Debug on