CA38BL-15R mounting ideas

[Anonymous]

Hi,

First up what an excellent forum!..Thank you all for such good sounder info..Which is very hard to come by.

I am after some ideas on how others have externally mounted CA38 Transducers,Flaring block design ect . Airmar or Furuno don't sell a pre made flaring block for these transducers right?
My boat is a 32 foot glass planning hull.

Also does anybody have any feed back on how these transducers coupled to a 295 work in shallower water 100-150m bottom fishing, also using them bluewater game fishing sounding the top 100m.
The setup is predominantly for deep water 400-600m swordfishing but would like to how if it will still work "ok" for those other two applications as well.

Thanks in advance for any feedback!

 

[Snips]

Weapon,
The 38-15HR as you can see is a beast (size wise) of a transducer and wasn't designed to be mounted on a planning hulled vessel. That being said, can it be? Well anything is possible if you are willing to do enough fiberglass work. To go any further will require detailed photos of your hull and transom, can you post them for me?

Snips

 

[Anonymous]

Thank you for the feed back!, Much appreciated Snips.
Maybe I need to have a re-think re Transducer choice as I wasn't aware that making a flaring block for the CA38 and mounting them on a planning hull wasn't common practice.
My first choice was the R309 but is no longer available here in NZ..Just the R509 which at first I wasn't interested in paying the extra $ for chirp capability which I may never use.But its not out of the question.

What is your opinion on comparing the R309/R509and the CA38-15 , for deep water sounding 400-650m. Speed idle - 8knots max, target depth bottom 3rd of water depth .Using 28-50khz on the R309/R509 and 38 on the CA38. Using the FCV 295 .

Beam width for the R309 at 38khz is 9° x 15°

and the Ca38 is 12.5 x 21

Is that correct, Tighter beam pattern for the R309 ?
I couldnt find the beam width data for the R509,is it the same as the R309?.

Thank you!

 

[Snips]

Weapon,
The BW for the R509 is 23 X 11 at 28Khz and 9 X 5 at 60Khz. I have never tested the 38-15HR head-to-head with the 309 or 509. I have only tested the R309 against the R509 and found their performance to be very similar. All three of these transducers would serve you well albeit the R309/R509 have more flexibility because they are dual frequency plus have temperature. The R309/R509 were meant to be installed on fairing blocks to get the face of the transducer below the boundary layer of the hull. Even though you are fishing at 8 knots if your vessel is capable of over 30 knots they are not recommended due to the water pressure being applied to the ducer/fairing block at speed.

Snips

 

[Anonymous]

Excellent, Thank you very much for your feed back Snips.
I have found a R309 and will go with that.