Transducers

[fmaster360]

Does anyone know the angle of the transom on my boat? And on a side topic, can I use 5200 to fill in the old screw holes? They are pretty small, and I don't think they go all the way through...

Reading online, should I use the original holes, and then mount the new transducer on a piece of starboard?

[TheKid]

12 degree is the standard and what I have on a 222 FFV.

5200 could work in a pinch. I use epoxy to fill small holes. If you get the syringe type with a mixing tip you can shoot it in the hole. Then over fill slightly and use tape to hold it in. Then a light sand and done.

Since then, I bought a piece of starboard and made my own transom saver. I used that to cover all the holes on my 30 year old boat.

[Capt. Bob]

If you mean dead rise, that would be 19 degrees from what I have found. If in doubt, you could measure.

I'm fuzzy on the starboard mount thing  so hopefully someone else will help with that.

Good luck.

[John Jones]

Transom angle is not deadrise.

Here is a diagram and how to caclulate it.

http://www.rocketflap.com/transom_calc.php

[Capt. Bob]

Very interesting. I'll measure mine to satisfy my new found curiosity. I'm sure there must be something to gain by knowing that number.
Must be why they make outboards with adjustable trim.

Learn something new every day.

[fmaster360]

Thanks john!

[seabob4]

Transom angles are typically around 13-14 degrees.  Use can also figure out transom angle and deadrise by using the Law of Sines, if anyone remembers back to their HS geometry days...

[slvrlng]

Dang Bob you beat me to it! I think we had the sine discussion about three years ago on here and if I remember you blew everybody away with your recollection and how most of us had forgotten how to use it!

[Capt. Bob]

I don't use Trig often but when I do.....

I prefer the Law of Tangents......

Stay ambiguous my friend. 8)

[TheKid]

Yes, tangent and specifically tan-inverse. Who needs a hypotenuse.

As for the need of knowing the transom angle, some transducers require the correct shim to install, that requires the angle.

Just installed a TM260 last week. Otherwise, I would not have a clue on the angle.

As for the starboard.....if you have a question let me know. It is easy to make.

[GoneFission]

Let's see if I can remember - SOHCAHTOA!  

Sine = Opposite/Hypotenuse
Cosine = Adjacent/Hypotenuse
Tangent = Opposite/Adjacent

Man, that was in a back-of-the-head file folder...  

[RickK]

Oscar (Opposite)
-----------
Had    (Hypotenuse)

A        (Adjacent)
-----------
Heap   (Hypotenuse)

Of       (Opposite)
-----------
Apples (Adjacent)

Sine
Cosine
Tangent
In that order

[fmaster360]

I got it installed, just drilled new holes. Came out nice. I stuffed some 5200 in the old holes with a syringe. Didn't think it would be nescessary to drill em out and put marine tex in this time since they weren't going to be tapped. I played with the 546s a bit, it's nice. The blue charts are cool, I guess. But not worth $240. Worth $40 I guess, if I get my $200 rebate back. Otherwise I'll be  :evil: