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PNW_Wesley
Joined: 28 Nov 2019 Posts: 97 City/Region: Vancouver
State or Province: WA
C-Dory Year: 2003
C-Dory Model: 19 Angler
Vessel Name: Zenith
Photos: Zenith
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Posted: Tue Dec 24, 2019 4:53 pm Post subject: Scanstrut Power Tower mating to roof |
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I will be installing an 18" Garmin Fantom dome atop a 6" tall Scanstrut Power Tower, bolted to the roof.
The base of the tower is roughly 7' square, and is flat.
As you know, the roof has a curvature.
Has anyone installed this exact tower (or very similar), and how did you deal with the mismatch between the flat base and the curved roof?
Did you use a backing plate inside the boat for the tower? _________________ Wesley and Karen
Prior water toys:
15' Smoker Craft
14' SOAR Inflatable Kayak
18' Sea Ray
28' Bayliner
19' Smoker Craft
16' Duracraft
14' Starcraft |
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ssobol
Joined: 27 Oct 2012 Posts: 3370 City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
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Posted: Tue Dec 24, 2019 5:32 pm Post subject: |
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Get a piece of starboard or PVC lumber and contour it to fit. You could also use wood or just space it with washers. |
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thataway
Joined: 02 Nov 2003 Posts: 20803 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Tue Dec 24, 2019 6:11 pm Post subject: |
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I have used thin Starboard--actually high density polyethylene, cutting board from Wal Mart is cheaper for this application. Cut it to the contour of the roof-(using cardboard template. Basically what is needed is wedges which are enough to take the load--for example the outer 2" on each side works fine. In all of my radar installations I have just used fender washers inside --if the bolts you use don't have large enough, then a fender washer and then a fender washer. As I recollect the hole in the strut I used was either 5/16 or 3/8. _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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A Fishin C Guest
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Posted: Tue Dec 24, 2019 7:57 pm Post subject: |
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no backing plate
washers between tower base and roof
nice bead of white Life Calk between tower base and roof
use nylon washers under stainless washer on top other wise the SS washers will damage the powdercoat and it will flake off
see my pics |
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hardee
Joined: 30 Oct 2006 Posts: 12632 City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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Posted: Wed Dec 25, 2019 1:56 am Post subject: |
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A Fishin C wrote: | no backing plate
washers between tower base and roof
nice bead of white Life Calk between tower base and roof
use nylon washers under stainless washer on top other wise the SS washers will damage the powdercoat and it will flake off
see my pics |
Bingo!! I removed my Power Tower and had it re powder coated. Before that process, I had the holes drilled out so that I could put nylon bushings between the bolts and the tower base, and used nylon washers to isolate the powder coating from the SS hardware. Before that process, I had to take it off for the recoat because the powder coat had been chipped on installation. Should have tried some nail polish on the chip. Might have worked. Inside, I used large fender washers.
Harvey
SleepyC
_________________ Though in our sleep we are not conscious of our activity or surroundings, we should not, in our wakefulness, be unconscious of our sleep. |
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PNW_Wesley
Joined: 28 Nov 2019 Posts: 97 City/Region: Vancouver
State or Province: WA
C-Dory Year: 2003
C-Dory Model: 19 Angler
Vessel Name: Zenith
Photos: Zenith
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Posted: Wed Dec 25, 2019 11:48 am Post subject: Power Tower |
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I have not yet received the dome, but I have the tower.
Where the dome mates with the tower, what prevents wind-driven rain from coming in between the tower and dome? |
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ssobol
Joined: 27 Oct 2012 Posts: 3370 City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
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Posted: Wed Dec 25, 2019 12:05 pm Post subject: Re: Power Tower |
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PNW_Wesley wrote: | I have not yet received the dome, but I have the tower.
Where the dome mates with the tower, what prevents wind-driven rain from coming in between the tower and dome? |
Coming in to where?
The dome should be weather proof. The tower is just a hunk of metal. |
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PNW_Wesley
Joined: 28 Nov 2019 Posts: 97 City/Region: Vancouver
State or Province: WA
C-Dory Year: 2003
C-Dory Model: 19 Angler
Vessel Name: Zenith
Photos: Zenith
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Posted: Wed Dec 25, 2019 12:15 pm Post subject: Re: Power Tower |
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ssobol wrote: | PNW_Wesley wrote: | I have not yet received the dome, but I have the tower.
Where the dome mates with the tower, what prevents wind-driven rain from coming in between the tower and dome? |
Coming in to where?
The dome should be weather proof. The tower is just a hunk of metal. |
You may not tbe familiar this model: APT-150-01. The tower is hollow. |
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hardee
Joined: 30 Oct 2006 Posts: 12632 City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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Posted: Wed Dec 25, 2019 1:02 pm Post subject: |
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If I remember correctly, the tower came with a foam gasket material for the top plate. If it is sealed around the edges at the top, no worries about water entering the hollow portion. I also think that where my tower sits on the cabin roof there is a slightly flat area there. I don't have a photo of that step in the process of remounting so cannot confirm for sure, but check. You might have one big enough for the tower base.
There was also a mounting wedge. I don't remember if that was an option or came standard. I did not use it. Figured if it was foggy enough to need the radar, I would not be up on a planing angle, and if I was, the radar didn't need to be zeroed in to less that a quarter mile.
Merry Christmas
Harvey
SleepyC
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thataway
Joined: 02 Nov 2003 Posts: 20803 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Wed Dec 25, 2019 4:00 pm Post subject: |
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Quote: | Where the dome mates with the tower, what prevents wind-driven rain from coming in between the tower and dome? | . Not a problem. There is a fairly wide flange around the center of the tower. we leave a "weep hole" under the base. Very little if any water got inside. |
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