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Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Wind noise question

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JaxDad

Greater Toronto Area

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Joined: 08/02/2011

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Posted: 12/30/21 06:02am Link  |  Quote  |  Print  |  Notify Moderator

I had a similar issue with my C but knew the cause, it’s a routine thing to a pilot.

It’s the crosswind effect. When the airflow is head on there is equal pressure on both sides, but when the wind is favouring the drivers side there is increased pressure on that door, but also a corresponding lack of pressure (in fact a slight vacuum) on the passenger door. The physical layout of the front doors means the upper portion is pretty easy to pull away from the body.

In many cases just opening a roof vent will create a lower pressure on the inside of the RV and help equalize the pressure on the door.

klutchdust

Orange, California

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Posted: 01/03/22 09:32am Link  |  Quote  |  Print  |  Notify Moderator

JaxDad wrote:

I had a similar issue with my C but knew the cause, it’s a routine thing to a pilot.

It’s the crosswind effect. When the airflow is head on there is equal pressure on both sides, but when the wind is favouring the drivers side there is increased pressure on that door, but also a corresponding lack of pressure (in fact a slight vacuum) on the passenger door. The physical layout of the front doors means the upper portion is pretty easy to pull away from the body.

In many cases just opening a roof vent will create a lower pressure on the inside of the RV and help equalize the pressure on the door.


Yes, once I opened the vent in the bathroom my weird noises went away. i had an occasional tapping and found the awning strap the culprit.
Dishes i used paper towels or small towels in between the pots and pans. It was pleasantly quiet after that.

ron.dittmer

North-East Illinois

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Posted: 01/05/22 08:36am Link  |  Quote  |  Print  |  Notify Moderator

klutchdust wrote:

I had an occasional tapping and found the awning strap the culprit.
Dishes I used paper towels or small towels in between the pots and pans. It was pleasantly quiet after that.
Now you are getting into general interior noises.

It took me years to chase down all the odd noises and rattles. One that was most difficult to quiet down was our microwave oven. The back side of it inside the cabinet, flopped vertically with significant road imperfections. I must have done real good because people who know typical class Cs, are impressed riding in our rig.

Generally speaking, a class B+ will have a lot less front cab wind noise than a typical C with the overhead bunk. The frontal overhang funnels air around to the side doors where the blunt house walls get in the way of allowing the extra air to pass smoothly. Our rig SEEN HERE addresses the worst of that condition.


2007 Phoenix Cruiser model 2350, with 2006 Jeep Liberty in-tow

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