Why does the Typhoon vent fuel in displays
 

I was curious about the reason the aircraft vents fuel during its displays (assuming its not deliberate). At the rate it consumes fuel I would have thought the waste would be avoided if possible.

It's possibly not fuel venting you see. Maybe water vapour, created by the sooper dooper wing thingy, passing through moist air causing a fuel vent effect.

Those 12 hours I had on Bulldogs were not entirely wasted.........:)

The jaguar used to vent it all the time, just a poor seal on the vent valve allowing fuel out you could often only see a Jag at low level because of it.
I do not know about the Tiffy.

18
You can see the same effect on F1 cars in wet conditions.

Vacuum sucks, valves seep, Sh1t happens. The Typhoon is a cracking jet, much envied by our cousins across the water (past Ireland). You may also be seeing wing tip vortices generated by the bits and bobs hanging on the aforesaid wing tips. As they say "up north", " there's naw't wrong wee what you're seeing". Nice effect I think myself.

Smudge

The VC10 does this as well...or maybe it is the cracks in the wings?

VC10 Display Routine:

Pitot Heat: On

Pitot Heat: Off

...so it can't be intentional.

Where is BEagle?

I will never forget the departure from Brize bound for the US , someone spotting the leaking wings, quick dive back to Brize...and the crew jumping off first leaving 130ish ICSC(L) studes wondering what is going on.

It was pure comedy.

G:ok:

And (bad grammer, I know) the Shacks, bumbling out from their apron onto Lossies'' Rwy 23 used to dump gallons of AVSMELL. The poor Caravan Controller couldn't light a fag for hours.

The gallons of Teflon paint I applied to the underside of 56 Squadron ( RAFs " premier Lightning squadron") main planes, to no avail. As I recall, one of few aircraft allowed to have drip trays positioned for Royal Inspections.

Smudge

So. Really none of the above comments relate to the blokes question about Typhoon.
Well done.

betty

This is PPRuNe. What do you expect?

Nor does your comment.

Betty,

It's an old British trait, as few who post on here have current experience on Typhoon, and therefore are not competent to appraise the OPs observations on that type, we have tried to proffer similar experiences on types we are familiar with. Would you rather the OP met with no response at all ?

Smudge

Taxi just noticed your location. Half of the graveyard in Bedale is filled with my ancestors the Joys.

Because that part of the fuel system comes from the Tornado and has been used as a "one size fits all".

Actually Bettie, I did add I do not know about the Tiffy at the bottom, you obviously skipped that bit. For what it's worth a vent valve is a vent valve, is a vent valve, regardless of period built some of the core parts do not develop much beyond what works. And no matter how complex a fuel system it will still need one be it a modern fighter or a 1911 car.
Wut Smudge said...




..

Fair point. However my point was that comparing a Jag to a Typhoon is as much use as A Nimrod to a Herc. Totally different fuel sys etc. that was all. No need for the defensive comments!!
Whilst I understand this is a rumour site, I'm betting the originator is more confused than anything else...

A simple point met with much noise.

Added a little to post. Sorry if it came over as being defensive, wasn't intending it to be.


..

'So. Really none of the above comments relate to the blokes question about Typhoon.
Well done.'

You utter, utter, utter, tube.

Enjoy your transition - I am sure it will match your expectations.

You will be great in CivDiv.

G:ok:

A true gent. Thanks. And my intention was far from trying to be antagonistic
Time for a beer...

Ah. Gijoe

My point exactly. Thanks for making it!