Garmin 45DV chartplotter & transducer fit to SIB (Aerotec) - Page 2

Fenlander · 30 April 2016, 18:24

>>>the new Chirp version.

Oh no... not another upgrade possibility!

Like you I dont need a fishfinder but just thought the dept readout would be interesting and another navigation aid.

Pikey Dave · 30 April 2016, 18:50

Quote:

Originally Posted by Fenlander

>>>the new Chirp version.

Oh no... not another upgrade possibility!

Like you I dont need a fishfinder but just thought the dept readout would be interesting and another navigation aid.

Oh! you've gotta have CHIRP, it's very very good

Fenlander · 30 April 2016, 19:14

>>>you've gotta have CHIRP

Hmm I've hardly got the transducer in salt water with this one... I think that would be trying "her" patience a little too much!

Fenlander · 09 May 2016, 23:55

Just some feedback that we had the first day out with the transducer fitted (about 2" deeper than in post #19) and it was a great result. Reliable depth information even at all speeds on the plane.

Bit of splash from the wood the transducer's mounted on but I think I can lift it a bit and still get decent readings.

seadogdave · 10 May 2016, 08:34

I've attached a photo of my transducer mount on the ribeye. Due to the Ally Hull construction there is a lip protruding aft of the transom and it was too big to allow direct mounting so I cut a piece of thick nylon sheet similar to what Ribeye use for the engine mount and fixed that to the transom with bolts and silicone sealant. That block was drilled & tapped to match the transducer mounting bracket so I can adjust height easily without compromising the seal to the transom. I have it set parallel to the water such that if you lay a straight edge along the hull on the engine side of the transducer, it is only about 2mm below the surface. Clearly the other side is a bit deeper. It works a treat at all speeds and creates no discernible wake of it's own. I hinge it up for transport and storage. The boat is hanging from my garage roof in this pic.
Hope the attachments work out OK. Not tried it before.

Dave

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Stigomery · 10 May 2016, 11:48

Quote:

Originally Posted by Fenlander

Just some feedback that we had the first day out with the transducer fitted (about 2" deeper than in post #19) and it was a great result. Reliable depth information even at all speeds on the plane.

Bit of splash from the wood the transducer's mounted on but I think I can lift it a bit and still get decent readings.

So I have the same set up but on a Honwave T38. The boat has the extended trim tabs from the inflatable keel/floor and I have the transducer neatly in line with the tabs so as not to disrupt the under-boat flow of water. 9/10 I get good depth readings however every so often the depth starts flashing and I need to stop before it regains signal - annoying at speed.

Is this flashing a problem with turbulence fo you know? i.e. I'm losing signal... and therefore I should perhaps have the transducer slightly lower?

I can't go too much lower or I could foul the prop (those trim tams push the transducer perilously close to the leg of the OBM.

seadogdave · 10 May 2016, 12:05

There's gonna be an awful lot of disturbance close to the motor as the leg ploughs through the water and if I read your post correctly, your transducer is between the tab and the leg. Not a good place to be. If I were you I'd be moving the xducer away from the motor and design some method of mounting to the rear of the trim tab. Not familiar with the honwave construction, but I assume that these tabs are inflatable? If so, you need a bracket extending from the transom over the top of the tab. If they are a solid piece of something, then a bracket directly off the tab itself should work nicely. The sensor bottom really only needs to be a few mm under the surface when planing to get a good echo return.

Cheers

Dave

jeffstevens763@g · 10 May 2016, 12:13

you might get a signal rebound off something mid water which throws it off until it settles again mine does it now and again.
your transducer should be just below your hull.
trim tabs could affect it too

cheers

Stigomery · 10 May 2016, 12:26

I hadn't thought of putting it behind the trim tab.. possible maybe with a bit of engineering... but not ideal...

I'll experiment with putting it a little deeper if I can, otherwise it might be a post-trim tab construction

seadogdave · 10 May 2016, 12:38

Something mid water..... Like a fish

seadogdave · 10 May 2016, 12:43

Yes something like that but on the starboard side per jeff's post. It's a bit of a stretch across that tab, but do able with a bit of thought.

Dave

seadogdave · 10 May 2016, 12:44

Yes something like that but on the starboard side per jeff's post. It's a bit of a stretch across that tab, but do able with a bit of thought.

Dave

Stigomery · 10 May 2016, 12:49

Was only on port because the pics were photo'd that way ;-)

Will see what I can fab up and try out...

Fenlander · 10 May 2016, 13:03

Stig you ever seen this before.. a thought??

http://static.wixstatic.com/media/1c...a6fd99c92a.jpg

seadogdave · 10 May 2016, 13:15

Just my opinion, but I'd be scared of catching a lump of driftwood, rope or similar and losing my toy. That looks really precarious to me. The bracket is designed to kick up on impact but with the bracket mounted out on a limb there is no protection and could even take the tube out. As I said, just my thoughts on it...

Dave

Stigomery · 10 May 2016, 13:27

Yeh, not so sure on that tube mounting... Might just sell the Honwave and buy an Aerotec ;-)

jeffstevens763@g · 10 May 2016, 14:22

we discussed this a while back my idea was to glue say some rubber oar blocks to the top of the trim tab and fix the transducer to that, you would have the same position as on a conventional SIB [no trim tabs] if you look on the Ron hale website under inflatable accessories you will see what i mean.

cheers

Stigomery · 10 May 2016, 14:28

Not a bad idea, something like this (2 of) would allow me to slip a fixing to the trim tab with a simple clip that stops it sliding rearwards whilst not too intrusive when I don't have the transducer on the boat:

http://www.ronhalemarine.co.uk/super...etaining_Patch

jeffstevens763@g · 10 May 2016, 17:40

What I was thinking of doesn't look like he s.tocks them now but yes what you have there but if you look at sea screw they have same as that but where the strap is its solid with a 10mm hole through it long ways so width will be no problem and you could bolt through.

Cheers

jeffstevens763@g · 10 May 2016, 18:27

Fish finder mounts .com loads of ideas magnetic, strap on, side mount.