Paddleducks
Other Marine Models => Live steam => Topic started by: derekwarner_decoy on May 08, 2008, 08:56:23 PM
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Hi PD's..... in a recent snap..... :crash...Eddy posted a view looking onto the bridge of PS Waverley.....but three of the four ventilators were facing AFT & would apparently not catch any breeze to supply the lower deck/engine space/boiler space with natural air convection
I rest my case ...or does this confirm that AIR blows backwards in UK....
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The wind passing around the ventilators facing AFT is creating a low pressure zone in the vent throat this depressurized zone is filled with air from the lower decks which supplies forced air convection.
Regards,
Gerald
PS This was written at 7:20AM BC(before coffee.)
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No, the air only blows backwards if you are standing upside down....er...a bit like you chaps :whistle :gathering
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Well good morning PD's & Gerald....please enjoy your :coffee.....& we appreciate your comment/question...
:thinking ....we have a twofold question here
1) 'Ventilators' [to move air] ...do admit air & so attempt to maintain a higher pressure so as to displace...
2) 'Ventilators' [to move air]...via the expulsion of air via venturi effect [similar looking to ventilators]....but a bit different....looking :hammer
I fully acknowledge that a backwards facing [to the wind] ventilator will cause a negative pressure draw....so we should get some of the PD members :gathering.....on board the said vessel to offer comment here :beer