Watchdog slams BA's air safety

[Richardp]

Hey! I'm happy to go on in my belief that Qantas has had no accidents, this suits me good, no accidents , thank you, I like them planes that stay up in the air and do what they are spose to do Oh! yes.

 

[empip]

Spot the giveaway spinners on a Super Constipation - nojet !

This is all the accident data I could glean on Qantas...
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1. http://www.planecrashinfo.com/1927/1927-1.htm
2. http://www.planecrashinfo.com/1934/1934-13.htm
3. http://www.planecrashinfo.com/1942/1942-6.htm
4. http://www.planecrashinfo.com/1943/1943-28.htm
5. http://www.planecrashinfo.com/1943/1943-9.htm
6. http://www.planecrashinfo.com/1944/1944-24.htm
7. http://www.planecrashinfo.com/1951/1951-29.htm
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[Richardp]

sorry pip I can't read that propaganda, I far as I'm concerned biggles flies undone

 

[empip]

Hey! I'm happy to go on in my belief that Qantas has had no accidents, this suits me good, no accidents , thank you, I like them planes that stay up in the air and do what they are spose to do Oh! yes.

They've had accidents, just no passenger/ crew killed for many years.
Given the inevitability .. .. Some may say they are due.. oooer!


You'll need Biggles when the doodah hits the fan blades !

 

[Richardp]

only one thing to say to you pip..............................Garuda

 

[empip]

only one thing to say to you pip..............................Garuda

Seven fatal accidents since '74 .... 407 deaths .. not so bad, I mean 234 of them were on the same plane.

 

[Big_Spark]

empip..Super Constellations are classified as Jets.

They are Turbo-prop aircraft..these are Jet engines with propellers..in their simplest form..

The Engines are NOT internal combustion and therefore JET..even if they do not rely on a jet blast for the actual propulsion of the aircraft..

Look here

Lastly, their aircraft was hit by a JET, so it is still likely classified as a Jet regardless of how others classify it..

 

[empip]

Turbo or Turbine ?

......The throwaway energy from engine exhausts was utilised by use of a Turbo charger coupled to the engine crankshaft via a fluid drive, this is known as turbo-compounding only the Wright R-3350 Turbo Cyclone was used widely.......

Guess which aircraft used the W R-3350 variant..... Yep you got it.

Specifications:
Lockheed Model 1049H "Super Constellation"
Powerplant:
Four Wright Cyclone R-3350-988TC18EA-2 Turbo-Compound Engines
Rated @ 3,400 Hp (2,535.38 Kw) each

Those engines were from a very famous line of piston driven radials .. not turbines, but, to the unknowing, the 'compound' part of the name is sometimes dropped, hence the turbo = turbine, in this instance, incorrect association.
Like to see a diagram?

AFAIK Vicker's Viscount was the first (turbine) turboprop airliner from any nation to enter service.

Lockheed L-188 Electra was a (turbine) turbo prop which followed on from the Constellation series. ( Four Allison 501 turboprop engines. )

 

[DDoyle]

Thanks PIP for clearing that up..from your explanation I can see why they are often thought opf as Turbo-prop aircraft when they are not...

Cheers.

 

[empip]

Clever use of the turbo isn't it? I like the fluid drive...

 

[DDoyle]

It's very novel compared to standard turbines used on internal combustion engines..but I am not a mechanic so I dare say a lot of it's innovation is lost on a hethen git like me..

 

[Big_Spark]

Clever use of the turbo isn't it? I like the fluid drive...

It reminds me of the drives used on the pump stations on the Alaskan pipeline, although they are electrically driven obviously, they have a fluid drive on them as the motors are constant speed but a...damn..can't think of the name..ho hum.....Viscous coupling(hey hey..the brain functions!!) provides the connection to an automatic hydraulic gearbox for the torque transfer to the final drive..I heard from one of the mechanical engineers it had been developed from an aircraft drive system..I wonder if this was it?

But as Mr Doyle (or is it Miss?) says above..I am not a mechanic so it sort of escapes me a bit..

 

[Richardp]

reminds me of an old single cylinder petter we used to have on our stone crushing machine, we was always running out of grinding paste trying to keep them valves sweet.

 

[empip]

What the old single cyl diesel? they used to run with 1/4" bore clearance didn't they? They can rev a bit with the governors held open .. F1 dumpers !! and blown engines from memory.

 

[empip]

It's very novel compared to standard turbines used on internal combustion engines..but I am not a mechanic so I dare say a lot of it's innovation is lost on a hethen git like me..

This a good starting point for such info. ...

...Following the war, in order to better serve the civilian market, the Turbo-Compound system was developed in order to deliver better "gas milage". In these versions of the engine, three separate power recovery turbines were attached to the exhaust piping of each group of 6 cylinders, using the power not to deliver additional boost as in a normal turbocharger, but geared directly to the engine crankshaft in order to deliver more power. This recovered about 20% of the heat of the exhaust, which would otherwise be wasted. By this point reliability had further improved, with the mean time between overhauls at 3,500 hours.....

(my emboldening )
Supercharged .... 18 cylinders 2 banks .. approx 55 litres displacement whew ! Each cylinder >3 litres !! 4 such beasts on one aircraft.