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  #1  
Old 11 December 2017, 21:04
poison poison is offline
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Oddball: how can I measure the altitude of a helo from the ground?

Obviously a rangefinder can do the job, but then maths happen. Is there a device that can tell the altitude automatically?
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Old 11 December 2017, 22:13
Stretch Stretch is offline
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Quote:
Originally Posted by poison View Post
Obviously a rangefinder can do the job, but then maths happen. Is there a device that can tell the altitude automatically?
Let me know when you develop an app for a sextant...

Pythagoras did the math, its easy.
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Old 11 December 2017, 22:15
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Yes. What's the context
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Old 11 December 2017, 22:15
bounceandburst bounceandburst is offline
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Oddball question, use the rangefinder and "Have a little faith, baby." Read this and know is I typing in my best Donald Sutherland accent.
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Old 11 December 2017, 22:23
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Quote:
Originally Posted by poison View Post
Obviously a rangefinder can do the job, but then maths happen. Is there a device that can tell the altitude automatically?
Yes. You can't afford it.
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Old 11 December 2017, 22:34
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A radio. Ask the pilot.

A coincidence (or a stereoscopic) rangefinder will tell you how far it is from you. The angle of sight of a rangefinder and the range to the target can be combined in a simple computer to produce a measurement of altitude. The resulting instrument becomes a combined height-finder/rangefinder and was standard equipment for land and naval based anti-aircraft units.
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Old 11 December 2017, 22:52
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Originally Posted by Longrifle View Post
standard equipment for land and naval based anti-aircraft units.
Should also work just fine against drones.
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Old 11 December 2017, 23:17
doitforjonny doitforjonny is offline
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http://elms.smcps.org/student-tutori...measure-height

Work on guestimating your 66' linear distance from said helicopter.

I guess you could also mil it out with binos, if your aircraft ID was shit hot, and you were the best damn spotter in the world....
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Old 11 December 2017, 23:19
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Quote:
Originally Posted by poison View Post
Obviously a rangefinder can do the job, but then maths happen. Is there a device that can tell the altitude automatically?
Yes. Flip open your Stinger. If you get a lock, the helo isn't high enough.
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Old 12 December 2017, 00:34
Attila175 Attila175 is offline
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ask the crew chief to hold the end of the tape measure and then jump out with the other end.
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Old 12 December 2017, 01:30
Akheloce Akheloce is offline
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The radar altimeter located on the panel by the knee usually works pretty well :)
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Old 12 December 2017, 02:22
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Thumbs up

Quote:
Originally Posted by doitforjonny View Post
http://elms.smcps.org/student-tutori...measure-height

Work on guestimating your 66' linear distance from said helicopter.

I guess you could also mil it out with binos, if your aircraft ID was shit hot, and you were the best damn spotter in the world....
I agree with you
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  #13  
Old 12 December 2017, 07:43
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Quote:
Originally Posted by poison View Post
Obviously a rangefinder can do the job, but then maths happen. Is there a device that can tell the altitude automatically?
Yea. I know a guy who can explain it to you
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Old 12 December 2017, 08:07
Hostile0311 Hostile0311 is offline
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Originally Posted by MakoZeroSix View Post
Yea. I know a guy who can explain it to you
Bwaaaaaaahhahhahha. Winner.
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Old 12 December 2017, 08:46
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  #16  
Old 12 December 2017, 09:55
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Pinochet?
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Old 12 December 2017, 10:06
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Ding ding.

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  #18  
Old 12 December 2017, 10:30
Shark0311 Shark0311 is offline
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Here you go.

https://www.radarbox24.com/
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  #19  
Old 12 December 2017, 11:58
poison poison is offline
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This thread is everything I expected and more.

Quote:
Originally Posted by hawkdrver View Post
Yes. What's the context
Um, standing on the ground with a helo overhead and off in the distance a bit?

Celebs house keeps getting buzzed hard by helos, neighbors are irritated, we want to find a way to show they're under 500ft.

Quote:
Originally Posted by gavin View Post
Yes. You can't afford it.
I figured, I know vaguely about that one.

Quote:
Originally Posted by Azatty View Post
Yes. Flip open your Stinger. If you get a lock, the helo isn't high enough.
I almost made a Stinger comment, thanks for filling the gap!
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  #20  
Old 12 December 2017, 14:44
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https://www.amazon.com/Nikon-Forestr.../dp/B076JMZRCP
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