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transom or mast???

Friends and fellow boaters... you have all been a tremendous help to this new boater with your earnest and quick reply to my many questions...

I have one more...

Where should I put my radar doom... on the mast or rear of the transom???

Your pros and cons please!!!!

John Allamand 31
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post #2 of 9 Old 03-29-2017
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Re: transom or mast???

On mast: longer range, you already have the 'post'.
On Mast: more involved/difficult wire runs
On mast: longer run to radar display (hopefully/ideally at the helm)

At stern: Shorter (but likely adequate) range
At stern: require a post of adequate height (overhead of cockpit crew) and stiffness
At stern: post mount reinforcement likely required
At stern: shorter wiring runs to helm, better access throughout (hopefully)
At stern: easier to clean dome

My preference is stern post. btw there are backstay mount options as well that would avoid the pole.
Self-Levelling Radar Mounts : LMB-F1 Self Levelling Radar Mount ? Backstay

A gimballed mount would be preferred if you expect to need radar while sailing upwind, or spend a lot of time in a seaway with significant wave action.

Short mast sections - perhaps from a broken rig - have been used as posts with success.

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Last edited by Faster; 03-29-2017 at 12:07 PM.
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post #3 of 9 Old 03-29-2017
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Re: transom or mast???

Fastar pretty much nailed it re. pros and cons.

I would add that I have mast mounted and as much as I like it, I do worry about the complications of replacing it when/if it messes the bed.
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post #4 of 9 Old 03-31-2017
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Re: transom or mast???

Quote:
Originally Posted by Faster View Post
On mast: longer range, you already have the 'post'.
On Mast: more involved/difficult wire runs
On mast: longer run to radar display (hopefully/ideally at the helm)

At stern: Shorter (but likely adequate) range
At stern: require a post of adequate height (overhead of cockpit crew) and stiffness
At stern: post mount reinforcement likely required
At stern: shorter wiring runs to helm, better access throughout (hopefully)
At stern: easier to clean dome

My preference is stern post. btw there are backstay mount options as well that would avoid the pole.
Self-Levelling Radar Mounts : LMB-F1 Self Levelling Radar Mount ? Backstay

A gimballed mount would be preferred if you expect to need radar while sailing upwind, or spend a lot of time in a seaway with significant wave action.

Short mast sections - perhaps from a broken rig - have been used as posts with success.
I've got a self-leveling Questus backstay mount that was installed about 16 years ago. It's very similar to the Scanstrut mount. It places the radome about 10' above the waterline and has been more than adequate for range. It keeps the radome out of harm's way, as no sail touches it, whereas that would be an issue for a mast-mounted radome. There has never been a problem other than replacing the hardware store grade anti-chafe grommets where the wiring enters and leaves. The installation itself is simpler than that for a stern post, but the Questus was fairly expensive--somewhere around $900 back in 2001, if memory serves.
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post #5 of 9 Old 03-31-2017
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Re: transom or mast???

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Originally Posted by julianj08 View Post
Friends and fellow boaters... you have all been a tremendous help to this new boater with your earnest and quick reply to my many questions...

I have one more...

Where should I put my radar doom... on the mast or rear of the transom???

Your pros and cons please!!!!

John Allamand 31
The higher, the less chance of dooming the crew. Domes can be lower.

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Re: transom or mast???

I own one of these fine vessels (hull #15). had this question a couple years ago. I opted to mount mine on the back of the boat, strictly because of ease of installation and maintenance accessibility. Works GREAT. I also thought... Me and my 31' boat are never going to be anywhere that I would need 26 mile radar contact.
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post #7 of 9 Old 04-08-2017
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Re: transom or mast???

mine is part way up my mizzen mast. will keep it there after replacement of my mizzenmast due to breakage from cane patricia 2015.


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formosa 41, cruising tropics


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post #8 of 9 Old 04-08-2017
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Re: transom or mast???

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mine is part way up my mizzen mast. will keep it there after replacement of my mizzenmast due to breakage from cane patricia 2015.

OK, I'll bite.
How did your mast break...causes?
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post #9 of 9 Old 04-08-2017
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Re: transom or mast???

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Originally Posted by RegisteredUser View Post
OK, I'll bite.
How did your mast break...causes?
i donot know if you are aware that in 2015 there was a hurricane named patricia that hit a cane hole in southwest coast of mexico. i believe i wrote extensively on that hurricane. i was there where the winds were 215 MILES per hour and gusts were 250 MILES per hour with a wood mast with a wind genny on its mast head. donot do that.
you will suffer mast breakage., my mast was 40 yr old perfect thai cedar hollow box constructuion. no rot no damages UNTIL cane patricia. does that answer your question. i believe you can search the posts and find the info here in sailnet. in gory detail


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