FP_v2 From , joined Dec 1969, posts, RR: Posted (12 years 3 months 1 week 4 days 10 hours ago) and read 1085 times:
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?
KonaB777 From , joined Dec 1969, posts, RR: Reply 1, posted (12 years 3 months 1 week 4 days 10 hours ago) and read 1054 times:
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.
FP_v2 From , joined Dec 1969, posts, RR: Reply 2, posted (12 years 3 months 1 week 4 days 10 hours ago) and read 1045 times:
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 From United States of America, joined Nov 1999, 1614 posts, RR: 6 Reply 3, posted (12 years 3 months 1 week 4 days 9 hours ago) and read 1037 times:
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
XFSUgimpLB41X From United States of America, joined Aug 2000, 3962 posts, RR: 36 Reply 4, posted (12 years 3 months 1 week 4 days 7 hours ago) and read 1028 times:
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.
Minuteman From United States of America, joined Aug 2000, 271 posts, RR: 0 Reply 8, posted (12 years 3 months 1 week 2 days 23 hours ago) and read 940 times:
This is one I still haven't figured out...how does a PLASI provide both steady and flashing light?
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