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S&S Swan General - Exhaust on the transom
16 June 2017 - 11:40
#1
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matteosalamon
Join Date: 29 January 2007
Posts: 1019

Exhaust on the transom

Dear Friends,
 
quite every year I have to do some small painting cosmetic reparation on the exhaust discharge, on the transom  (Vanessa does not have the original gelcoat anymore).
 
Have they always been metallic on S&S Swan (and possibly later ones)? Wouldn’t have been better to have them in fiberglass?
 
Not a real problem, but just for my knowledge!
 
Fair winds!
 
matteo (47/069 Vanessa)
16 June 2017 - 13:06
#2
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the professor
Join Date: 02 January 2008
Posts: 1547

Dear Matteo

I think all S&S Swans had stainless exhaust exit tubes, but you are right, there would be much less to repair with GRP. 
If you gelcoat/paint as carefully as in the photo, nobody would detect if you put in a fiberglass tube instead
Kind regards
Lars
16 June 2017 - 21:14
#3
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matteosalamon
Join Date: 29 January 2007
Posts: 1019

Dear Lars,

thanks!

PS it will be fixed this week...!

Fair winds

matteo (47/069 Vanessa)
17 June 2017 - 19:33
#4
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Robmably
Join Date: 01 March 2007
Posts: 147

Do most exhausts on 47,s exit on the transom ?

Is it true that 47 CB versions sit lower in the water and therefore exhaust exit beneath the transom is too low?

On Sarabande ( fixed keel) the exhaust is beneath the transom which remains  fairly clean and I wondered if this would iWork for Vanessa?

 

Rob

 

sarabande 47/029
17 June 2017 - 20:40
#5
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matteosalamon
Join Date: 29 January 2007
Posts: 1019

Dear Rob,

on Vanessa it'ss the same as on Sarabande, and it's OK, unless you push the boat very hard (I never do it!)

See you in a couple of days!

Fair winds

matteo (47/069 Vanessa)
18 June 2017 - 07:56
#6
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the professor
Join Date: 02 January 2008
Posts: 1547

Dear Rob

Most 47's have the exhaust in the SB lower part of the transom like Vanessa. Other locations suggest that the exhaust has been moved.

A location beneath the transom is less visible, but increases the exhaust back pressure at speed when the stern wave covers the opening.
The CB versions weigh about a ton more, sit 35 mm lower in the water, and thus see the stern wave effects earlier.
Also Vanessa's exhaust will immerse at top speed as the water level rises some distance up on the transom, Matteo's answer confirms this.
Rod Stephens firm opinion was that the exhaust should be visible, so you can check that cooling water is coming out.
Kind regards
Lars

 
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