Elessar
Well-Known Member
Did you miss the fundamental point that most marine engines are not air cooled?
Engine noise reduction blanket
- Thread starter Vertor
- Start date
Did you miss the fundamental point that most marine engines are not air cooled?
Daydream believer
Well-Known Member
Would take issue with that. My launch has a lightweight sponge like material covered in a foil. It works very well & is certainly NOT heavy weight The noise reduction goes around 3 sides & the top. The other side is surrounded by battery plus some ancillaries like steering hydraulics etc. so difficult to contain.
Our club committee boat had something similar, but it was removed due to wear. It was , from memory, reasonably effective, in a very old yacht.
vyv_cox
Well-Known Member
I suspect that the age and type of engine may make a difference. My motorsailer has a BMC 2.2 engine, notoriously noisy. Lead-filled acoustic insulation has made a remarkable difference to noise levels. Whereas the Yanmar 3GM in my Sadler is far quieter and minimal insulation has made it almost silent in the saloon.
[70521]
Well-Known Member
No, but when I gain access to my engine it feels hot to touch after about 30 minutes.
Within out getting my old books out and doing the maths I'd rather the heat be radiated into air and moved through the ducting system and drawing in cooler air rather than have it trapped in a nice cosy duvet. If it was more efficient to have the engine wrapped in a thermal layer then I am sure the designer would have incorporated it in the original design.
prv
Well-Known Member
So what?
Its not trapped, it’s conducted into the coolant, pumped to the heat exchanger, conducted into seawater, and then ejected from the boat.
Pete
Elessar
Well-Known Member
And the problem with it being hot to the touch is......?
[beaten to it I should have read down!]