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<blockquote data-quote="2old4this" data-source="post: 11252" data-attributes="member: 174998">Wind resistance is a function of the surface area of the dish. Although most dishes are slightly elliptical, we can consider it to be circular for ease of calculation. So its area is calculated as (roughly) pi times the square of the radius;&nbsp; this means that the areas of the 100cm and 110cm diameter dishes are:3.1416 * (100/2)**2 = 7854 square centimeters3.1416 * (110/2)**2 = 9503 square centimetersso the bigger dish presents a (1-(9503/7854))*100% = 21% larger surface to any incident wind (which is where Old Satellite's 20% comes from).I personally use a rule of thumb that typical tolerance of electro-mechanical devices is about 10%. So indeed be careful here.But ultimately all of this depends on your location and on how exposed the dish actually is. If it's tucked away in a relatively wind-free corner somewhere, there won't be a problem. But one good tip just in case you do get a storm is this: orient the dish so that as small a surface as possible is presented to the incoming wind. IE send it to a sat chosen such that in that position, the dish edge is facing the worst of the wind. You could also make this a habit when you're not using it for any length of time (nights, weekends-away). Makes a world of difference.2old</blockquote>

[QUOTE="2old4this, post: 11252, member: 174998"] Wind resistance is a function of the surface area of the dish. Although most dishes are slightly elliptical, we can consider it to be circular for ease of calculation. So its area is calculated as (roughly) pi times the square of the radius; this means that the areas of the 100cm and 110cm diameter dishes are: 3.1416 * (100/2)**2 = 7854 square centimeters 3.1416 * (110/2)**2 = 9503 square centimeters so the bigger dish presents a (1-(9503/7854))*100% = 21% larger surface to any incident wind (which is where Old Satellite's 20% comes from). I personally use a rule of thumb that typical tolerance of electro-mechanical devices is about 10%. So indeed be careful here. But ultimately all of this depends on your location and on how exposed the dish actually is. If it's tucked away in a relatively wind-free corner somewhere, there won't be a problem. But one good tip just in case you do get a storm is this: orient the dish so that as small a surface as possible is presented to the incoming wind. IE send it to a sat chosen such that in that position, the dish edge is facing the worst of the wind. You could also make this a habit when you're not using it for any length of time (nights, weekends-away). Makes a world of difference. 2old [/QUOTE]

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