I am guessing 20 mph or so.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

What is the per-square-inch weight of the flag material?

no idea.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

See the Flag over Armstrong's Left Shoulder in the Picture?

No Breezes on the Moon.

Attached Thumbnails

 

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'84 300SD sold
124.128

Beaufort Method

Find a flag blowing in the wind. This method requires no math but more of a subjective reading. The Beaufort Method uses a heavy flag, which are large flags found at military bases or weather stations.

1.
Observe how it reacts to the wind. If the flag is not moving at all, the wind speed is below 11 mph.

2.
Observe the flag. If it flaps lightly and sporadically the wind is blowing at around 12 to 18 mph.

3.
Estimate the flapping of the flag. If the flag is flapping over the whole length of the flag, it is blowing at around 19 to 24 mph.

4.
Measure how far the flag extends in the wind. If it is partially extended and flaps quickly, the wind speed is 25 to 31 mph. A fully extended flag flapping hard in the wind will be around 32 to 37 mph. It's not possible to use a flag to measure any higher as the flag will react in the same way, even with harsher winds.

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'84 300SD sold
124.128

Cool, thanks!

I told the Mrs. someone here would know!

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

No wind--Spring-loaded stiffeners held it out.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags

Flag Viagra.

Overall size of flag matters too, no?

There's a Honda dealer in these parts that flies a gargantuan flag. Must be10' x 20'. Hardly moves unless there's a real strong blow.

I look at flags to gauge wind speed everyday. Wind speed and direction is the primary indicator of how rough the ocean is going to be, and as a captain I need to know this to inform the folks that wish to go boating.
Two factors come into play when looking at a flag to judge wind speed- the flag size and the amount it is sticking out. Small flags fly straight in lower wind speeds than larger flags. A 4X8 flag needs about 13 knots steady to be about 110 degrees out, 16 knots to be 100 degrees and 20+ knots to be 90 (perpendicular - aka starched).

Perfectly straight? A lot, (infinite?) I am thinking it is asymptotic. And it's still never going to be straight. It will oscillate around some plane.

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Remember, Safety Third!
'99 E300 Turbodiesel, '82 300TD, 1996 12V Cummins Turbo, '94 Neoplan - Detroit 6V92TA

Show me a nekkid women in a tree and I'll show you a flag fully erect.

Please, nobody post any photos of women ITT. He might have a zoom lens on his camera.

__________________
Remember, Safety Third!
'99 E300 Turbodiesel, '82 300TD, 1996 12V Cummins Turbo, '94 Neoplan - Detroit 6V92TA

For the flagging astronaut.

Here Botnst, this is for you.

why a man shouldn't parachute naked - YouTube

__________________
Remember, Safety Third!
'99 E300 Turbodiesel, '82 300TD, 1996 12V Cummins Turbo, '94 Neoplan - Detroit 6V92TA