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Brian Johnson

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1) How do you calculate your Standard deviation and turbulence intensity found in the preferences tab of OpenRocket?
2) Is there a website that provides this information for a specific City our county?
Thank you
Brian
 

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Nytrunner

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The intensity and SD are linked in OpenR (one drives the other and vice versa). As far as I know, this is just a feature that allows you to enter in some statistical variation in the wind during flight (since wind isn't constant in reality)

I usually just have a 5% setting for general purposes. You could check out Windy.com for wind data around the country (and world)
 

Buckeye

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Yes, that feature copies Rocksim to add some variability to the simulation. I am not sure if it randomizes the wind continuously throughout the ascent and descent simulation, or if it picks a wind setting at the beginning of a sim and holds it constant. If you are really eager to find out, the source code is "Open."

Personally, I don't like it or use it. I want my simulations to repeat exactly when I re-run them! I am happy with a nominal result.
 

Brian Johnson

Ascender F27R
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130
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Cape Canaveral
The intensity and SD are linked in OpenR (one drives the other and vice versa). As far as I know, this is just a feature that allows you to enter in some statistical variation in the wind during flight (since wind isn't constant in reality)

I usually just have a 5% setting for general purposes. You could check out Windy.com for wind data around the country (and world)
Thanks I got it working. Do you know where I can find an estes ascender .rkt or .ork file?
 

Brian Johnson

Ascender F27R
TRF Supporter
Joined
Dec 4, 2019
Messages
130
Reaction score
14
Location
Cape Canaveral
Yes, that feature copies Rocksim to add some variability to the simulation. I am not sure if it randomizes the wind continuously throughout the ascent and descent simulation, or if it picks a wind setting at the beginning of a sim and holds it constant. If you are really eager to find out, the source code is "Open."

Personally, I don't like it or use it. I want my simulations to repeat exactly when I re-run them! I am happy with a nominal result.
Buckeye
I was told by another user that it does randomize the conditions.
 
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