….it see the torch if I shone it into the sky at night ?

I’m not thinking of getting stranded on a desert island but just asking just incase !

Torch would be a mega bright one

You’d have to shine it almost directly at the pilot and/or hope for some light scattering through through a hazy atmosphere.

And the word is “shone”

are you on a conveyor belt?

I think they used big bright torches to illuminate German bombers over London in WWII.

andyl – Member
are you on a conveyor belt?

POSTED 53 SECONDS AGO # REPORT-POST

I’m lost

Flight 815?

Would the torches have laser guided rockets?? What exactly are you planning?

Lost on a conveyor belt? Things really are looking bleak!

Is the desert on a conveyor belt one way, and the plane the other way?

If it was misty, or if you lit a huge smokey fire, the beam would stand out more.

Is it cloudy?
A modern LED flashlight, outputting maybe 500-1000Ln, ought to be visible against an otherwise completely dark background, especially if it’s set on SOS or strobe, particularly strobe, as it would be something out of the ordinary which would catch the eye.
Of course, altitude of the plane may make a difference, at 35,000ft a plane may well be too high, but from 10,000ft, it should be visible to an SAR plane.
It’s why emergency strobes are carried.
‘Course, you need charged batteries… 😉

You need to sellotape a bat to the front of the torch too.

How high could a bat fly with a torch?

Best to use a green laser pointer

OP: http://singletrackworld.com/forum/topic/what-is-this-aircraft-on-a-conveyor-belt-that-people-often-quote

cloudnine – Member

Would the torches have laser guided rockets?? What exactly are you planning?

Dr. Evil: Are those sharks with laser beams attached to their heads?

Scott Evil: [nods]

Dr. Evil: Cool! You mean that I actually have frickin’ sharks with frickin’ laser beams attached to their frickin’ heads?

Was reading one of those “aint the human body amazing” things yesterday and with regards to the eye “On a dark night, you could even see a candle flame flickering up to 30 mile away”

http://www.livescience.com/33895-human-eye.html”

So my answer would be yes.. probably…

Does the torch have the power of a million candles.
[video]http://youtu.be/Vt8aAy_8Ub4[/video]

On a dark night, you could even see a candle flame flickering up to 30 mile away

Only if your eyes were fully adjusted. If you are flying a plane though your eyes are having instruments and lights shone in them all the time.

This could be calculated if you know the spread of the beam and how sensitive the eye can be. However I’ve not found any information on how many mCd can be perceived.

Holy cow.. I posted that and went back to Google and within a minute my own post is the second hit.

Holy cow Google!

I posted that and went back to Google and within a minute my own post is the second hit.

No,it’s this

How high could a bat fly with a torch?

African or European?

African or European?

Are torches different in different places?

AlasdairMc – Member
African or European?
Are torches different in different places?

Is that hard to swallow?

how much light would a woodchuck shine if a woodchuck could shine light?