Simviation Forums

hello guys,

can anyone tell me the difference between the PAPI and VASI navigational systems? there must be a difference otherwise they wouldn't have a different name...

thanks!

PAPI
http://icl.cs.utk.edu/papi/

http://icl.cs.utk.edu/projects/papi/overview/

Here is me in the Baron with the PAPI lights on approach!




VASI
http://www.flytandem.com/vasi/vasi.htm

http://www.academy.jccbi.gov/cgi/course.cgi?cn=44118

http://www.thaiflyingclub.com/linkrunway05vasi.html

http://www.mail-archive.com/flightgear- ... 19780.html

http://www.mail-archive.com/flightgear- ... 19773.html

Hope this helps Ken!

Dave

you again...thanks Dave, i owe you one!

but with PAPI i meant something else, " Precision Approach Path Indicator ", but it's ok, i've already found some info on the web!

thanks again!

Precision Approach Path Indicator PAPI

A precision approach path indicator (PAPI) system shall be provided to serve the approach to a runway whether or not the runway is served by other visual approach aids or by non-visual aids, where one or more of the following conditions exist:

1. The runway is used by jet aircraft or other aircraft with similar approach guidance requirements;

2. The pilot of any type of aircraft who may have difficulty in judging the approach due to:

If you have Fs2k2 then pop down to Cardif EGFF. Their runway 12 has a single bar PAPI.
Dan

VASI INFO!!!

VISUAL  APPROACH  SLOPE  INDICATORS (VASI)

stop Dave...STOOOOOOOPPPPPPPPPPP!!!!!! i can't take it anymore...too much info. i'll have a beard when i've read all this.

thanks dude, i owe you two now!  ;)

Think you have a lot of reading? I have just finished a 4298 word PC building article, and theres at least another 9 pages to go! Arr, my eyes will never be the same again!
Dan

still one question about the PAPI system.

on what technique is it based or what physical law? has it something to do with Fresnel?  ;)

AFAIK it's a box with a lamp in it, with a red and a white clolred aperture in it