PPRuNe Forums - View Single Post - Altimeter and temperature
View Single Post
Old 8th Apr 2013, 05:38
  #7 (permalink)  
Speedbird777
 
Join Date: Apr 2001
Location: Leeds
Posts: 79
Likes: 0
Received 0 Likes on 0 Posts
Appreciate the replies but still not completely resolved my conundrum. Take this example for instance.

If I take the example one step further and say that I have two airports at exactly the same elevation. Airport A is under standard conditions and is 100ft MSL. Airport B is at 100ft MSL but temp is 25 degrees hotter. I take off from airfield A where my altimeter reads 100ft MSL. I fly at 1000ft to the location of airfield B where the temperature is hotter. I do not change my altimeter setting. According to the theory, at location B, I think I am flying at 1000ft but my altimeter is understating my height and so my plane is HIGHER than the indicated reading on my altimeter. However, if I land at airfield B (100 ft MSL but hotter than airfield A), my altimeter will read higher than 100ft because the air pressure is lower in hotter air (density altitude increases with higher temp).

Thanks again smart people.......
Speedbird777 is offline