Letter to Geoffrey Thomas (Aviation expert)

[FoxtrotAlpha18]

Marauder...didn't they tell you you'd go blind?

Look closer!

[jieunni]

Steve,

I think you forgot to mention that the Pass Mark for ALL of those Exams is 75%!

I'm not sure if there are any other professions with that requirement?

That might be a little out of context.

Would you be feeling safe if your brain surgeon had scored 75% in college?

[The Green Goblin]

Quote:
Steve,

I think you forgot to mention that the Pass Mark for ALL of those Exams is 75%!

I'm not sure if there are any other professions with that requirement?
That might be a little out of context.

Would you be feeling safe if your brain surgeon had scored 75% in college?

In university, all you need to do is get on the right side of 50% and it's a pass

[Another Number]

Cat outta da bag

Now its even clearer what kind of arrangement Stokes' Seven & QANTAS have - with the current round of cutesy co-branding (Happy Birthday Jetstar animations etc).

And why GT would never retract his strategic lies ... read all about his pet project funded and cross-promoted by the Stokes' West Australian/Seven ... a series of "not necessarily voyeuristic" Cut Price Air Crash Investigations on that bastion of objectivity Today Tonight!

With huge and very welcome help from all his dearest friends.


Not bad for a second rate hobbyist middle-aged "flight sim kiddy".

[SRM]

GT at it again

See GT is now an expert on Volcanic Ash.

Once again I ask,what aviation qualifications has this guy got to be an aviation expert.

[stewser89]

Did anyone see him of the 7pmproject just now. Does a turbofan really reach 2000 degrees C? That seems a bit too hot, especially when its half the temperature of the sun according to Geoffrey.

[gobbledock]

Did anyone see him of the 7pmproject just now. Does a turbofan really reach 2000 degrees C? That seems a bit too hot, especially when its half the temperature of the sun according to Geoffrey.

What a Turkey. I think the only thing reaching 2000 degrees C is his underpants everytime he is offered $$$$ to post some farcical, half ar#sed non educated opinion on matters he knows very little about.
Mind you, he could be easily mistaken in his looks for another Wirthless individual that is not Wirth mentioning

[QFinsider]

Just how far his "support" extends through the seven network is a very interesting case study. He lacks any integrity and possesses very little knowledge.

[Roxy_Chick_1989]

Did anyone see him of the 7pmproject just now. Does a turbofan really reach 2000 degrees C? That seems a bit too hot, especially when its half the temperature of the sun according to Geoffrey.

To be fair..

Ultra hight BPR turbofans get pretty close to that in their combustion chambers.

As for half the temperature of the sun now that is a first!

[stewser89]

Yep to be fair. Temperature after combustion is around 1500C to 2000C but not for very long.
Correct me if I'm wrong but they have to cool it with extra air in the flame tube. Otherwise the components would melt.

However half the sun's surface temperature is 2700C.

But i guess it sounds more dramatic if I add that. Same as planes falling out of skies (okay he didn't say this but he didn't correct it either)

[The Green Goblin]

Yep to be fair. Temperature after combustion is around 1500C to 2000C but not for very long.
Correct me if I'm wrong but they have to cool it with extra air in the flame tube. Otherwise the components would melt.

However half the sun's surface temperature is 2700C.

But i guess it sounds more dramatic if I add that. Same as planes falling out of skies (okay he didn't say this but he didn't correct it either)

That temp will literally be 'in the flame iteself'. The majority of the air developed by the compressor 2/3rds I believe is to control flame propagation. The flame is kept centrally orientated in the combustion chamber and compressed air is routed through circular openings in the walls of the combustion chamber to prevent the flame making contact with the sides.

If 2000 degrees got anywhere near the first stage of the turbine, it would be pretty safe to say there would be expensive chunks of metal vacating the jet pipe.

[Sunfish]

From memory the F404 First stage blades are in a 1500C gas stream and are operating at about 300C above their own melting point - cooled of course by film cooling from bleed air.

[The Green Goblin]

From memory the F404 First stage blades are in a 1500C gas stream and are operating at about 300C above their own melting point - cooled of course by film cooling from bleed air.

Not technically correct.

Bleed air by definition is 'bled' from the engine.

Flame propagation is controlled from excess compressor discharge. Not all the compressed air is required for combustion. In fact, most of the air developed by the compressor is used to contain the fireball within the combustion chamber.

Bleed air is bled from the compressor and used for ancillary services (Aircon packs, ice protection, pneumatic systems etc).

[Sunfish]

I'm sure you are right GG, but the air came from the compressor and was fed from inside the turbine blade through a labyrinth of tiny holes.

[The Green Goblin]

I'm sure you are right GG, but the air came from the compressor and was fed from inside the turbine blade through a labyrinth of tiny holes.

If you look at turbine engine schematics you will see of the air discharged from the compressor, some makes it's way into the combustion chamber, most diverts around the combustion intake and is re inserted at various intervals and locations for cooling.

Bleed air is tapped further upstream of compressor discharge and is routed away from the engine through various one way check valves to desired services in regulated and unregulated form.

[amos2]

Yeah! Yeah!... very impressive...I think not!
That's engines 101...very basic, straight from the manual, and easily understood by anyone on a transition or endorsement course.
Still, if it makes you feel good...?

[gobbledock]

Cafe Sua Da anyone?

It would appear that hcmcassclown cut and pasted from a manual while sipping on a lemon, lime and bitters at Cafe El Queero.......

Kopi Luwak anyone?

[1me]

Bleed air, or more correctly customer bleed air, is tapped off and bled from an engine at two stages of the HPC, typically 5th stage and 9th stage.

This is not strictly true either. Big engines generally take bleed air off both IPC and HPC..

We're a bit off track though..

[Anthill]

hcmc

Dunno about Obie, but Amos has been around for years and has probably forgoten more than you will ever know. Does all that drivel impress anyone down at 919?

You remind me of the line from the Good Bard:

"His digits upon his member, fully gript"

[amos2]

The clown has said:

"Maybe I really am a 3 time loser, maybe I really am an assclown, maybe I really am not that great after all....."

...and, I think we may all agree with that self assessment, clown!