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Ray my dark site sometimes gets bouts of wind. An FSQ106ED is short and would sit below the wind as the walls are about 2.5 metres high or so. But an RCOS 12.5 closed tube I had stuck above the roof right in the wind stream and was impossible even in light winds.
So a smaller refractor for the windy nights works.
The other plan I had was to build a simple wind shield on the roof. Like a say 600mm wide x 2 metre long hinged panel that could be propped up with a bit of an angle to blow the wind up at an angle above the observatory. 2 steel or timber props fixed to some sort of bracket on the roof could work. I think that could be effective.
I have sometimes lifted and put the black plastic gear storage crates on the roof to create a wind shadow. Its been somewhat successful.
My refractors like AP140 are only somewhat affected by wind and the crates work so I only lose some subs. Hence the wind shade idea is most likely simple and very workable and no complicated dome, cost, visibility etc.
A better mount would help but will not handle it. I am using a PMX and an AP140 often and still can get wind effects and the AP only sticks above the roofline maybe 100mm.
Greg.
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