matt1215 0 #1 June 28, 2006 I took my Neptune with me on a commercial flight, halfway expecting an accurate reading . I estimate the readings I got to be roughly 1/6 true altitude. I know 757's fly higher than 6.5k. That would explain why my ears were so sensitive to my first few skydives . Quote Share this post Link to post Share on other sites
IanHarrop 42 #2 June 28, 2006 Typically the internal air pressure of commercial aircraft is something less than 8k. I think your Neptune may have been accurate based on the internal air pressure, unless you were sitting outside the 757. "Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites
Remster 30 #3 June 28, 2006 Quote halfway expecting an accurate reading It was accurate! The pressure of the cabin was the same as being 6.5 k up with no pressurisation Remster Quote Share this post Link to post Share on other sites
MF42 0 #4 June 28, 2006 A 757 is pressurized. That's why the altimeter was inaccurate. Matt Quote Share this post Link to post Share on other sites
matt1215 0 #5 June 28, 2006 That'd make for a mighty cold exit Quote Share this post Link to post Share on other sites
matt1215 0 #6 June 28, 2006 Which is whay my ears were so messed up the first few times I went to 15k Quote Share this post Link to post Share on other sites
bch7773 0 #7 June 29, 2006 uhhh if the plane was unpressurized you would be dead. they pressurize them at about 7k. MB 3528, RB 1182 Quote Share this post Link to post Share on other sites
