744 takeoff
 

Went to Mumbai last Monday on BA 139- on takeoff, I was looking at the engines and noticed that the intakes filled with water vapour on spool-up, and this lasted until rotation.
I'd be interested to know what causes this, I haven't noticed it before.

Very nice flight, by the way, same goes for the return flight last Friday.
:)

Finally, compliments of the season to all, especially those who post such interesting replies and info here. I've learned a lot since I've ben logging on here.

Low pressure at the front of the engine causes humid air to condense, In very humid area's you will see the same effect over the wings as well once the aircraft rotates for takeoff.

Cheers
Wino

and here's a nice photo......

Condensation

Merry xmas!

And another...

HERE

...Errrr, Is there a condensation at front of the radome?:D :D
Happy Holidays

Bokomoko,

There is a photo out there somewhere of an F-18 just as it hits mach 1. There is a vertical 'saucer' of condensation around the radome, and a 'halo' just behind the pilot. I'll try to dig it up as time permits. Doesn't look like the PA D10 has condensation around its radome, rather just looks like a white radome!!

Merry Christmas everyone

Thanks, Wino, Dufwer and Simon W for the explanation and pics.
Hope you have a great Christmas and New Year!

This is the B1 approaching Mach 1.

B1 Photo