wind and my Casita - Page 3 - Fiberglass RV


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Old 03-29-2016, 09:45 PM   #29
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Trailer: 2008 Scamp 13 S1
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Quote:
Originally Posted by robertsd8 View Post
For those who want to compute the wind speed to topple their trailer, here is a formula posted by 2oldman on RV.Net in 2011. WARNING: It may make your head hurt! Note: I have not independantly checked this out to vouch for it.

V=SQRT (W*B/{0.00666*L*[H-H2/2]*(H/2+H2/4)})

Where:
V = Wind Speed
SQRT = Square Root
W = Trailer Weight, LBS
B = Trailer Width (Tire Center to Center), FT
L = Trailer Length, FT
H = Trailer Height (From Ground), FT
H2 = Tire Height, FT
For what it's worth, the formula gives an answer of about 63 (mph?) for my Scamp 13 (W=1600, B=5.5, L=13, H=7.25, H2=2). Gusts, and even sustained winds, of that magnitude are common in parts of northern Arizona (and the California desert). I wonder if the formula takes into account the use of stabilizers. I also wonder how differing trailer profiles affect the dynamics.
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Old 03-29-2016, 11:02 PM   #30
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Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
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Originally Posted by Borrego Dave View Post
Towing/driving into a head wind is not a problem, it's the side winds that can get you. How many pics have we all seen of big rigs being rolled over because of that?
I think the OP was talking of a static situation. Two years ago we had a 100+ wind storm that blew for hours. One of the neighbors had his large 5th wheel go over, a number of roofs were lost also. My Casita was parked behind the house which broke the wind. If it had been in it's normal spot you would have heard of a cracked egg . BTW, I do remember a post and pics of an egg being blown over with the owner inside.
I don't think the OP was talking about "big rigs" either. Or roofs flying, etc.
Since you are worried about side winds then park the trailer facing into the wind. DUH!
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Old 03-30-2016, 01:59 AM   #31
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Name: Dave
Trailer: Casita SD17 2006
California
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Quote:
Originally Posted by Byron Kinnaman View Post
I don't think the OP was talking about "big rigs" either. Or roofs flying, etc.
Since you are worried about side winds then park the trailer facing into the wind. DUH!
You're correct Byron, the OP didn't mention big rigs or roofs, I used that as an example of what side winds can do, which was his question as he was parked and a bit worried. Some folks don't have much experience with high winds and 30 is only a breeze here. It's been blowing 40-60 here for the last two days. Sorry you didn't care for my response but it was to the OP. Being static and driving into a headwind are two different critters.
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Old 03-30-2016, 05:18 AM   #32
Raz
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Name: Raz
Trailer: Trillium 2010
Vermont
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Quote:
V=SQRT (W*B/{0.00666*L*[H-H2/2]*(H/2+H2/4)})

Where:

V = Wind Speed
SQRT = Square Root
W = Trailer Weight, LBS
B = Trailer Width (Tire Center to Center), FT
L = Trailer Length, FT
H = Trailer Height (From Ground), FT
H2 = Tire Height, FT
I'd love to see the derivation. Raz
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