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Why does the Typhoon vent fuel in displays

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Why does the Typhoon vent fuel in displays

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Old 23rd Aug 2013, 17:12
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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.

Last edited by 18greens; 23rd Aug 2013 at 17:34.
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Old 23rd Aug 2013, 18:02
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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.........
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Old 23rd Aug 2013, 18:16
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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.
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Old 23rd Aug 2013, 18:25
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18
You can see the same effect on F1 cars in wet conditions.
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Old 23rd Aug 2013, 18:51
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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
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Old 23rd Aug 2013, 19:10
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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

Last edited by gijoe; 23rd Aug 2013 at 19:13.
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Old 23rd Aug 2013, 19:22
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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.
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Old 23rd Aug 2013, 20:07
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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
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Old 23rd Aug 2013, 20:29
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So. Really none of the above comments relate to the blokes question about Typhoon.
Well done.
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Old 23rd Aug 2013, 20:33
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betty

This is PPRuNe. What do you expect?
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Old 23rd Aug 2013, 20:35
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Nor does your comment.
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Old 23rd Aug 2013, 20:36
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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
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Old 23rd Aug 2013, 20:36
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Taxi just noticed your location. Half of the graveyard in Bedale is filled with my ancestors the Joys.
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Old 23rd Aug 2013, 20:43
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Because that part of the fuel system comes from the Tornado and has been used as a "one size fits all".
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Old 23rd Aug 2013, 20:43
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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...




..

Last edited by NutLoose; 23rd Aug 2013 at 21:11.
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Old 23rd Aug 2013, 21:00
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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.
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Old 23rd Aug 2013, 21:09
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Added a little to post. Sorry if it came over as being defensive, wasn't intending it to be.


..

Last edited by NutLoose; 23rd Aug 2013 at 21:12.
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Old 23rd Aug 2013, 21:21
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'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

Last edited by gijoe; 23rd Aug 2013 at 21:24.
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Old 23rd Aug 2013, 21:21
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A true gent. Thanks. And my intention was far from trying to be antagonistic
Time for a beer...
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Old 23rd Aug 2013, 21:22
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Ah. Gijoe

My point exactly. Thanks for making it!
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