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Keeping Planes Aloft

Posted December 09, 2007 8:07 AM

Cost of fuel has driven the aerospace industry to replace older engines with newer, more energy efficient ones. But how do you design a more efficient engine that will fit into the same engine mounting frame? By coating the blades with platinum aluminide ceramic coatings that can withstand higher gas firing temperatures and velocities and therefore reduce damage due to oxidation and corrosion.

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Guru
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Location: Christchurch, (The Garden City), South Island, New Zealand
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#1

Re: Keeping Planes Aloft

12/11/2007 5:25 AM

Please also remember that a high-flying jet, destroys 4 tons of elemental Ozone, each second, through each engine.

Ever wonder why the Ozone holes....

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Guru

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#3
In reply to #1

Re: Keeping Planes Aloft

12/15/2007 11:34 AM

I have never heard that before. Many many years ago I said that if any one wanted to know why there were holes in the Ozone they should ask themselves what on earth is punching holes in it ( I was referring to the space missions).

I am glad to finally see someone else that is on board with this logic.

cr3

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#2

Re: Keeping Planes Aloft

12/15/2007 11:30 AM

There is another idea to use a modern form of "Ram Jet" in the same engine design so as to incease fuel effiency and give better power performance per ton of fuel used.

See page 14 of Scientific American (Dec 2007) Supersonic pulse power.

Interesting idea.

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Guru

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#4

Re: Keeping Planes Aloft

02/01/2008 5:40 PM

There is a seasonal ozone hole (some % reduction) over Antarctica every summer, when the Earth tilts away from the Sun, and gets extended darkness.

Additionally, there is a permanent one over WashingtonDC, and occasionally over Kennebunkport.

Seriously: Any advancement in the thermodynamic cycle is an improvement. It means increasing internal temperatures / pressures, higher bypass ratio, etc. As we reached the max. that can be extracted from metal blades, active cooling and ceramic coating is the way to move further. For many years Rutgers University NJ researcher tried to develop pure ceramic blades and other components with not much visible for their efforts. But, such a coating may contribute to the longevity of the engine.

Mounting of a different design on the wing is not a problem, as it is sliding on to a simple I beam, then fastened in place.

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