×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

standard atmosphere

standard atmosphere

standard atmosphere

(OP)
Am currently working on performance predictions for helicopters but I lack some data on atmosphere.

I read somewhere that specific models existed for cold regions and hot ones. I've been googling for it and haven't found much except than saying such charts exist with no links. I've also searched the NASA/NACA database for these charts but haven't found anything.
Does anyone have a link to these charts or know where I could find specific information?

I remember reading that the ISA chart isn't correct for such different climates.

thanks in advance
tom

the difference between a kid's passion and an mine is that I'm going to get paid for it.

RE: standard atmosphere

I also have a vague memory of such a chart. Perhaps a search of ICAO documents , or the NATO AGARD committee documents.

Good Luck

RE: standard atmosphere

Check out SAE AIR 1168/9 "Thermophysical Properties of the Natural Environment, Gases, Liquids, and Solids".

Regards, WKT

Regards, Wil Taylor

RE: standard atmosphere

The old P&W vest pocket handbook (mine - 1978 version)has such a chart. It defines a hot, tropical, cold and polar atmosphere each with their unique "non-standard" lapse rates. The handbook references a MIL-STD-210A.

RE: standard atmosphere

The replacement for MIL-STD-210 is MIL-HDBK-310, but I don't recall either have lapse rate tables.

TTFN

RE: standard atmosphere

Have just become aware of a NASA-HDBK-1001 which is a definition of the earth's environment. Do not know its precise content, but know it does talk to atmospheric temperatures, so appears to be relevant to your question.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources