Guest

Papi System + Car In Fron Of It.

Fri Feb 16, 2001 1:22 pm

Recently while passing near the airport I decided to park my car in front of the runway and wait for any planes that might be landing. Sure enaugh a Dash-8 was on final in no time, but I noticed that the PAPI system was not working in a sence that the lights remained red throughout the approach. Could my car(being metal) somehow confuse the PAPI to think I was an aircraft on the runway instead of traacking the landing a/c?
 
Guest

RE: Papi System + Car In Fron Of It.

Fri Feb 16, 2001 1:25 pm

There are different light signals sent out for whatever altitude you are i.e.: all light signals are being sent out all at the same time, the red signal you were seeing was being displayed to you because you were "low" on the glideslope.
 
Guest

RE: Papi System + Car In Fron Of It.

Fri Feb 16, 2001 1:32 pm

so your saying that while i was seeing all the lights to be red, the landing aircraft was seeing the 2 white/2 red lights indicating to him a propper glideslope at the same time.........how is this possible?
 
Ralgha
Posts: 1589
Joined: Tue Nov 09, 1999 6:20 pm

RE: Papi System + Car In Fron Of It.

Fri Feb 16, 2001 3:04 pm

A PAPI displays all the lights at the same time, each one is angled and shielded so you can only see it if you are at the appropriate height on the glideslope Big thumbs up
09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
 
XFSUgimpLB41X
Posts: 3960
Joined: Fri Aug 25, 2000 1:18 am

RE: Papi System + Car In Fron Of It.

Fri Feb 16, 2001 4:14 pm

A PAPI has no transmitter or reciever thing. All that it is is just lights that have lenses on them set so when you are on the glide slope it shows the proper red over white indication. Alot of people think there is some sore of radio transmitter or radar involved..but it is just set lenses. Think of each light as a big colored christmas light with two different colors on it.
Chicks dig winglets.
 
Guest

RE: Papi System + Car In Fron Of It.

Sat Feb 17, 2001 3:32 am

All the really are, is angled lights, the white one is shining high, while the red one is pointing more down.
Iain
 
Guest

RE: Papi System + Car In Fron Of It.

Sat Feb 17, 2001 9:14 am

Thanks guys I now understand.
 
Guest

RE: Papi System + Car In Fron Of It.

Sat Feb 17, 2001 1:24 pm

All I can say is:


FOUR RED.....YOU'RE DEAD!!!
 
Minuteman
Posts: 260
Joined: Sat Aug 05, 2000 1:01 am

RE: Papi System + Car In Fron Of It.

Sun Feb 18, 2001 12:09 am

This is one I still haven't figured out...how does a PLASI provide both steady and flashing light?

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