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Radar

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Dschack View Drop Down
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Joined: 07 September 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dschack Quote  Post ReplyReply Direct Link To This Post Topic: Radar
    Posted: 23 November 2020 at 17:35
I will be adding radar to my 342. Interested in getting feedback as to where best to mount dome on mast. 
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alettaenmarcel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote alettaenmarcel Quote  Post ReplyReply Direct Link To This Post Posted: 24 November 2020 at 17:24
on the side off the mast
No isues with the jib



Edited by alettaenmarcel - 24 November 2020 at 17:27
Kids Dingys 72-79 ,Several Windsurfboards 79-86 OK dingy competitions 86-92 , Trotter Pandora Race 92-98, Friendship 28 Sport 98-05, Hanse 370 06-......
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Dschack View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dschack Quote  Post ReplyReply Direct Link To This Post Posted: 24 November 2020 at 18:18
thank you. Hadn’t thought about that as an option. I was concerned about headsail hanging up. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote echoofwight Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2020 at 08:20
the Radar on Echo was originally on the front of the mast and was hit by the jib when tacking, especially close to the wind when sheeted in hard. Its now on the side of the mast and clear of the jib. With the main sail fully out it presses on the Radar slightly but this seems much less of a problem. 


Steve. Hanse 341 Echo of Wight, . Deep draft and rudder, white hull, Single aft cabin. Raymarine instruments. Raymarine radar. Garmin AIS. Wheel Steering,   Portsmouth.
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Captain Cook View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2020 at 09:39
My radar is mounted aft, approx. 3,5 meters above sea level. Mounting gizmos are also available for a mount in the aft stay.
The formula for the distance to the apparent horizon is 2,08*sqr(h). (h in meters). For the distance from your  radar mounted at height (H) to a ship with a reflecting surface in the height (h) it is 2,08*sqr(H+h).
On my ship the radar will discover a sailboat at a distance of  2,08*sqr(3m+5m) = 6 Nautical miles, and a larger vessel will appear on the radar screen at a distance of 10-15 Nm.
(The sailboat is assumed to carry a radar reflector in a height of 5 meters).
My radar is capable of discovering other ships at a distance of 24 Nm, (if mounted high), but why should I care about a ship that far away?
My point is, that a radar mounted on a pole in the aft may be sufficient for most sailors.
(The numbers for visible / apparent horizon are 1,927 and 2,075).



Edited by Captain Cook - 25 November 2020 at 16:09
Freya H400 #27 (2006), 40HP 3JH4E, 2-cabin, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M603(VHF)+M802(SSB)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dogscout Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2020 at 12:37
Its sideways but you get it.  radar is mounted to the side.  This is on my 430e
Adventure awaits
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Peter-Blake View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Peter-Blake Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2020 at 14:03
This is the way we installed our radar. It works perfekt. It is a scanstrut Mast on the backstay.
It is about 3.5m above Waterline


Edited by Peter-Blake - 25 November 2020 at 14:04
Blake 370
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AndyS View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AndyS Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2020 at 19:58
We too have our radar on a mast behind the starboard wheel. I personally like having it within easy reach so that if a repair is needed we can get to it simply. It works great there, and I have determined for me it's better there than dealing with it up the mast. 
Andy
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River Dunes, NC
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dschack Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2020 at 05:20
thanks.  Is there a specific bracket that you used or did you have to have it fabricated?
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Matt1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Matt1 Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2020 at 08:13
I think most people here use the scanstrut one, not sure if that is available where you are. I'm installing Radar in the spring so interested in this thread. The UK dealer seems to fit the dome at an angle eg pointing towards the Stbd bow (45deg to the centreline) if that makes sense? I tried to find a pic online but can't! This seems to be a happy compromise between fouling the self tacking jib or chafing the mainsail when off the wind. I think that is what I will do
 
 
Hanse 418 #64 EmBer. Hamble, UK

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