A day's work starts in Singapore, leaving Changi at 12:10 pm. The day's work ends in Chapel Hill, 11:10 pm. A total of 23 hours from Changi to Newark, through customs, discovering our AA flight had been canceled, switching to Continental 2445 with our baggage already checked with AA, arriving at RDU and discovering both Josh and our baggage was waiting for us. A pretty good day. Here is the GPS record of our trip. You can click on the labels in the upper right and suppress segments. The P1 is from Singapore to somewhere over Canada where I changed batteries. P2 is from the battery change place to EWR. The Active Logs are uncompressed GPS track files.
The Google map below is active. You can click and drag the map, zoom in on the airports to check whether my GPS agrees with the satellite photos of the runways and just have fun.
Leaving Changi, a ValueAir flight landing
I am fascinated by the conditions required to make these tubes of condensed water (I think) - here it is
The mechanism apparently is related to vortex formation and the reduced pressure inside the vortex. There are some interesting references in Wikipedia to vortex formation at the tips of aircraft wings, contrails, and the Prandtl-Glauert singularity.
A few moments later the condensate tube transiently appears and disappears as conditions change. These appear to be related to both the speed and the relative humidty. Low humidity, and they tend not to form
Here is a moment later - no tube
The flying a southern route - here over Lake Superior
Flying in to New Jersey
and taxi to the gate. SQ 22 all the way
Then leaving EWR for RDU
More takeoff - nice evening lights
The wind and New Jersey
Then 90 minutes later, Durham
and landing at RDU
C. Frank Starmer