Can anyone share advice to attaching...

[Teampenner]

Can anyone share advice to attaching a radar stand for a raydome to our radar arch on a 1988 300 sundancer? Thanks in advance

[wingless]

There were zero examples I found online for a arch radar on that boat.

Based on that evidence, I would be concerned about the arch strength.

If proceeding forward, then be aware that an elevated antenna mount will increase the stress forces inflicted onto the arch.

There should be large aluminum backing plated on the arch interior at the through bolt mounting points.

When I installed my radar onto my arch I used 5° wedges so that the open array would be level when underway, when the boat is on a plane, for maximum long-distance performance.


https://images0.boattrader.com/resize/1/51/9/7195109_0_311219691600_1.jpg?t=1311863

[Teampenner]

I have seen the same model and year with radar (raydome). I am just wondering if it is solid or hollow at the center. We were planning on moving our anchor light to behind the dome. We need to raise the dome a bit because our camper top is raised over the helm. We also have access plates to assist with pulling wire. Also wondering how to enter the wire into the arch. Thanks

[Teampenner]

This is one

[wingless]

Thanks for the image. Yes, it must be possible for that to work.

On my 2000 380DA the arch is hollow, w/ removable / replaceable covers so routing to the top is possible.

The factory placed my anchor light at that arch location, using a bent mast to clear the open array pedestal.

The factory has a glassed-in reinforcement for the pedestal at the inside center of my arch.

On mine, where the arch attaches to the hull, there are bolts w/ large backing plates. There are also large holes for routing wires and cables.

On mine, when I added large diameter plumbing for my air horns and whistles I also drilled an additional hole for that air line.

My suggestion is to limit the height of the elevated mount to the minimum required for clearance because of the extra stress that is increased w/ height.

Here are some images of mine:


[img]https://live.staticflickr.com/4509/23928915488_147dc66d60_c.jpg[/img]

[img]https://live.staticflickr.com/4472/37523545190_95ea065474_c.jpg[/img]

[img]https://live.staticflickr.com/4506/37523685130_45ede45a22_c.jpg[/img]

[Teampenner]

Thank you good sir! My boat is on land.. Any idea of bow raise on our boat up on plane? I understand they are all different to the load ect, although I have heard it is around 5 degrees.

[wingless]

You are welcome.

A good ballpark is the 5° rise.

The radar has a beam width angle. Getting near the center of that angle will improve the long distance radar performance, to get best surface returns, not pointed underwater or into the sky .

It will still work if not exact, but long distance performance won't be maximized.