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	<title>Comments on: Photo of the day - The huge A380 Engine</title>
	<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/</link>
	<description>The Aviation Blog</description>
	<pubDate>Sat, 11 Feb 2012 05:01:04 +0000</pubDate>
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		<title>By: Lindsay Ferguson</title>
		<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43593</link>
		<author>Lindsay Ferguson</author>
		<pubDate>Mon, 28 Jul 2008 08:51:53 +0000</pubDate>
		<guid>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43593</guid>
					<description>GREAT photo!

Havwe seen a few of Singapore Aurlines femal cabin crew sitting in the engine and the engine seems much smaller compared to them. Thus my quesitons is, is the man in the photo way BEHIND the engine rather tahn under the wing as it seems? 

thanks
look forward to your reply,

Lindsay Ferguson</description>
		<content:encoded><![CDATA[<p>GREAT photo!</p>
<p>Havwe seen a few of Singapore Aurlines femal cabin crew sitting in the engine and the engine seems much smaller compared to them. Thus my quesitons is, is the man in the photo way BEHIND the engine rather tahn under the wing as it seems? </p>
<p>thanks<br />
look forward to your reply,</p>
<p>Lindsay Ferguson</p>
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		<title>By: Michael</title>
		<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43672</link>
		<author>Michael</author>
		<pubDate>Mon, 28 Jul 2008 18:46:00 +0000</pubDate>
		<guid>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43672</guid>
					<description>Hi Lindsay,
yes you're right. The man on this photo is behind the engine.
The Rolls Royce Trent 900 engine has a fan diameter of 2,95m. (the Engine Alliance GP7200 has nearly the same size, with a fan diameter of 2,96m)</description>
		<content:encoded><![CDATA[<p>Hi Lindsay,<br />
yes you&#8217;re right. The man on this photo is behind the engine.<br />
The Rolls Royce Trent 900 engine has a fan diameter of 2,95m. (the Engine Alliance GP7200 has nearly the same size, with a fan diameter of 2,96m)</p>
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		<title>By: Lindsay Ferguson</title>
		<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43849</link>
		<author>Lindsay Ferguson</author>
		<pubDate>Tue, 29 Jul 2008 12:04:26 +0000</pubDate>
		<guid>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43849</guid>
					<description>Hi Michael

Thanks for this! Still a massive engine either way - and there are 4 of them!

Here's another question I don't know if you'll be able to answer... If the Rolls Royce engine works, why the need for one made by Engine Alliance - or vice versa? Surely the efficiency of one would be better than the other - then airlines would choose one over the other all the time? Or is one better for certain types of flight? 

Anyhow, thanks for your great photo and above reply.

Best wishes

Lindsay Ferguson</description>
		<content:encoded><![CDATA[<p>Hi Michael</p>
<p>Thanks for this! Still a massive engine either way - and there are 4 of them!</p>
<p>Here&#8217;s another question I don&#8217;t know if you&#8217;ll be able to answer&#8230; If the Rolls Royce engine works, why the need for one made by Engine Alliance - or vice versa? Surely the efficiency of one would be better than the other - then airlines would choose one over the other all the time? Or is one better for certain types of flight? </p>
<p>Anyhow, thanks for your great photo and above reply.</p>
<p>Best wishes</p>
<p>Lindsay Ferguson</p>
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		<title>By: Michael</title>
		<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43922</link>
		<author>Michael</author>
		<pubDate>Tue, 29 Jul 2008 19:18:34 +0000</pubDate>
		<guid>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-43922</guid>
					<description>Well, it's all about choice. Why to buy a Mercedes if you can have a BMW? ;)

One airline chooses Rolls Royce because from their point of view it's the best choice, like Singapore Airlines, for another airline it makes sense to choose EA, like Emirates.

One criteria might be the price, one the efficiency, one maybe the maintenance costs.

The Trent 900 has a weight of 6,4 kg and a thrust of 356 kN (80.000 lbf) - Thrust-to-weight ratio: 4.93 - 5.63
The GP7200 has a weight of 6,7 kg - so it's heavier than the Trent900 - but offers a little bit more thrust, 363 kN (81,500 lbf) - Thrust-to-weight ratio: 4.73 

In certain situations one might have a better fuel consumption than its competitor.
 
I don't think that you can say that one engine is better than the other, it's just a choice airlines have to make, based on various factors.</description>
		<content:encoded><![CDATA[<p>Well, it&#8217;s all about choice. Why to buy a Mercedes if you can have a BMW? <img src='http://blog.flightstory.net/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
<p>One airline chooses Rolls Royce because from their point of view it&#8217;s the best choice, like Singapore Airlines, for another airline it makes sense to choose EA, like Emirates.</p>
<p>One criteria might be the price, one the efficiency, one maybe the maintenance costs.</p>
<p>The Trent 900 has a weight of 6,4 kg and a thrust of 356 kN (80.000 lbf) - Thrust-to-weight ratio: 4.93 - 5.63<br />
The GP7200 has a weight of 6,7 kg - so it&#8217;s heavier than the Trent900 - but offers a little bit more thrust, 363 kN (81,500 lbf) - Thrust-to-weight ratio: 4.73 </p>
<p>In certain situations one might have a better fuel consumption than its competitor.</p>
<p>I don&#8217;t think that you can say that one engine is better than the other, it&#8217;s just a choice airlines have to make, based on various factors.</p>
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		<title>By: Nick</title>
		<link>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-183912</link>
		<author>Nick</author>
		<pubDate>Wed, 09 Mar 2011 18:46:10 +0000</pubDate>
		<guid>http://blog.flightstory.net/35/photo-of-the-day-the-huge-a380-engine/#comment-183912</guid>
					<description>Awesome photo.  Looks intimidating yet exciting at the same time.</description>
		<content:encoded><![CDATA[<p>Awesome photo.  Looks intimidating yet exciting at the same time.</p>
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