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by Matt6461
Fri Dec 12, 2014 1:05 am
Forum: Technical/Operations
Topic: Reliable Sources For OEW, MEW?
Replies: 3
Views: 2087

RE: Reliable Sources For OEW, MEW?

Thanks for responding KarelXWB. To be honest I don't trust the manuals though. They're always low. OEM's don't specify the weights of seats, lavs, etc. so they can fudge these figures without necessarily lying. Do you know, btw, what the respective OEM's at least claim to include in their OEW defini...

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by Matt6461
Fri Dec 12, 2014 12:07 am
Forum: Technical/Operations
Topic: Reliable Sources For OEW, MEW?
Replies: 3
Views: 2087

Reliable Sources For OEW, MEW?

Hi tech-ers, I'm wondering if anyone can point me to the most reliable sources for OEWs and MEWs, with pertinent parameters for each. As someone who likes to model airplane revisions from a quantitative perspective, finding reliable starting points is key. I know A and B have different definitions o...

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by Matt6461
Thu Dec 11, 2014 11:49 pm
Forum: Civil Aviation
Topic: The A380NEO Thread
Replies: 258
Views: 26662

RE: The A380NEO Thread

I've posted about this before but I think A should skip the NEO and do a A380X. Optimize the wing for the current fuselage rather than the stretch, harvest weight savings in landing gear, empennage, and engine size as a result of lower MTOW and MOEW. Say the NEO improves by 14% over the CEO. Well th...

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by Matt6461
Sat Nov 22, 2014 12:49 pm
Forum: Technical/Operations
Topic: Rear-door Jetbridges? Why Not?
Replies: 12
Views: 6436

RE: Rear-door Jetbridges? Why Not?

Thanks LollyJ! Cool pic.

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by Matt6461
Sat Nov 22, 2014 11:49 am
Forum: Technical/Operations
Topic: Rear-door Jetbridges? Why Not?
Replies: 12
Views: 6436

Rear-door Jetbridges? Why Not?

I am wondering whether rear door jet bridges have ever been used and, if not, why. It would work by cantilevering over a plane's wing to the rear exit. To give it sufficient stability, a mobile end or "anchor" unit would drive to the rear of the plane, and the jetbridge would attach to this mobile u...

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by Matt6461
Mon Oct 20, 2014 8:14 pm
Forum: Civil Aviation
Topic: A380neo Becoming A Reality: Leeham Analysis
Replies: 92
Views: 29328

RE: A380neo Becoming A Reality: Leeham Analysis

It would be interesting if someone could post the relative fuel efficiency of A380NEO vs. 777X. Leeham now sees the 777X as being 20% better on per-seat fuel burn than 555-seat A380. Its last analysis saw 26% difference versus a 525-seat A380. Leeham says it gained more info on <acronym title="Royal...

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by Matt6461
Wed Jul 30, 2014 5:00 am
Forum: Civil Aviation
Topic: A380 Production Thread Part 17
Replies: 205
Views: 74227

RE: A380 Production Thread Part 17

Looks like Airbus is going to have to find new buyers for at least two completed A380's. This story also mentions Hong Kong Airlines' intention to cancel its ten orders. With Amadeo likely to have to offer its 20 frames at firesale prices, will Airbus be able to find buyers for its 2016 slots, or is...

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by Matt6461
Fri Jul 25, 2014 8:13 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/seahawk" class="quote" target="_blank">seahawk</a> (<a href="#53" class="quote">Reply 53</a>):<br/><i>I still do not get the fixation on the 777...

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by Matt6461
Fri Jul 25, 2014 7:46 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

Take your time, Astuteman, I actually have a day job as well... This has mostly replaced reading in my spare time, but it's an itch I've needed to scratch.  <img src="http://cdn-www.airliners.net/aviation-forums/graphics/smilies/smile.gif" width="15" height="15" border="0"/><table border="0" al...

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by Matt6461
Fri Jul 25, 2014 12:19 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

BTW, Astuteman, there's room in this version for a 2025 80m A389X. Going to ultrafan (or later) generation of engines gets you 8,000nm range with wings loaded only slightly more heavily than 77X.

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by Matt6461
Fri Jul 25, 2014 12:11 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

OK I've run my numbers for the A388X again. This time I changed the wing to 77X <acronym title="Aerolineas Argentinas (Argentina)">AR</acronym> and did a drag/fuel burn buildup relative to the 77X "backwards" from landing to takeoff. On these numbers A388X is up to ~45% better on fuel than A388, 25%...

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by Matt6461
Thu Jul 24, 2014 2:03 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#47" class="quote">Reply 47</a>):<br/><i>On its own that won't save the A380 th...

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by Matt6461
Thu Jul 24, 2014 12:54 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#47" class="quote">Reply 47</a>):<br/><i>On the flip side, the only reason the ...

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by Matt6461
Tue Jul 22, 2014 8:43 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#45" class="quote">Reply 45</a>):<br/><i> Quoting Matt6461 (Reply 43): It won't...

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by Matt6461
Tue Jul 22, 2014 12:48 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

FWIW Google turned up this older Reuters story citing Boeing engineers for a 7% improvement from the wing. <a href="http://www.reuters.com/article/2013/07/03/airbus-boeing-minijumbo-idUSL5N0F829D20130703." target="_blank">http://www.reuters.com/article/2013/...g-minijumbo-idUSL5N0F829D20130703.</a> ...

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by Matt6461
Mon Jul 21, 2014 3:15 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#41" class="quote">Reply 41</a>):<br/><i>Add my 0.8% from above, and the increa...

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by Matt6461
Sun Jul 20, 2014 10:24 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#36" class="quote">Reply 36</a>):<br/><i> Quoting Matt6461 (Reply 32): The firs...

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by Matt6461
Sun Jul 20, 2014 10:00 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#31" class="quote">Reply 31</a>):<br/><i>Data from <acronym title="Singapore Ai...

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by Matt6461
Sun Jul 20, 2014 9:20 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#31" class="quote">Reply 31</a>):<br/><i>The other issues here are: a) a new hu...

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by Matt6461
Sun Jul 20, 2014 7:18 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#30" class="quote">Reply 30</a>):<br/><i>Finally, re-contouring the fuselage. T...

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by Matt6461
Sun Jul 20, 2014 6:57 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#31" class="quote">Reply 31</a>):<br/><i>Quoting Matt6461 (Thread starter): As ...

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by Matt6461
Sun Jul 20, 2014 6:45 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

By the way, here's a patent application for a laminar flow wing that describes how thickness influences laminar flow. http://www.google.com/patents/WO2012141770A2?cl=en

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by Matt6461
Sat Jul 19, 2014 8:48 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

Astuteman - Thank you so much for this very involved response. I was hoping for someone to directly engage me on the numbers and I really appreciate this post. I'm going to respond piecemeal in separate posts to some of your points, can't figure out how to quote more than once per post. <table borde...

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by Matt6461
Thu Jul 17, 2014 8:42 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/seahawk" class="quote" target="_blank">seahawk</a> (<a href="#27" class="quote">Reply 27</a>):<br/><i>Better short field performance is only tru...

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by Matt6461
Thu Jul 17, 2014 7:47 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/seahawk" class="quote" target="_blank">seahawk</a> (<a href="#27" class="quote">Reply 27</a>):<br/><i>That is what <acronym title="Emirates (Uni...

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by Matt6461
Thu Jul 17, 2014 10:16 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/seahawk" class="quote" target="_blank">seahawk</a> (<a href="#24" class="quote">Reply 24</a>):<br/><i>A quad will never be as efficient as the t...

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by Matt6461
Thu Jul 17, 2014 4:47 am
Forum: Technical/Operations
Topic: How Light Could A Clean-sheet Composite A380 Be?
Replies: 1
Views: 3363

RE: How Light Could A Clean-sheet Composite A380 Be?

This is an extremely difficult question to answer, I'm not surprised you've heard crickets so far. Alcoa claims that the benefits of CFRP are only 4% by weight as actually employed on an aircraft. On just the physical properties (strength/weight), I think the difference is around 15%. BUT, that stre...

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by Matt6461
Thu Jul 17, 2014 12:35 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/flyingcello" class="quote" target="_blank">flyingcello</a> (<a href="#20" class="quote">Reply 20</a>):<br/><i>Technically, all the ideas above l...

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by Matt6461
Thu Jul 17, 2014 12:11 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/flyingcello" class="quote" target="_blank">flyingcello</a> (<a href="#20" class="quote">Reply 20</a>):<br/><i>From memory, the original A380 bus...

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by Matt6461
Thu Jul 17, 2014 12:00 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

First of all, AstuteMan, thanks for your engagement on this topic. You raise good points but I think I need to clarify how I'm using "unit costs" and things like CASM (and I may not be using them correctly, per industry standards). <table border="0" align="CENTER" width="95%" class="quote"><tr><td><...

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by Matt6461
Wed Jul 16, 2014 7:49 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#14" class="quote">Reply 14</a>):<br/><i>Edit - I had intended to post this any...

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by Matt6461
Wed Jul 16, 2014 7:39 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/georgiaame" class="quote" target="_blank">georgiaame</a> (<a href="#13" class="quote">Reply 13</a>):<br/><i>Nice analysis</i></font></td></tr></...

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by Matt6461
Tue Jul 15, 2014 9:57 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/astuteman" class="quote" target="_blank">astuteman</a> (<a href="#7" class="quote">Reply 7</a>):<br/><i>The 777X improves fuel burn per seat by ...

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by Matt6461
Tue Jul 15, 2014 9:12 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/DocLightning" class="quote" target="_blank">DocLightning</a> (<a href="#3" class="quote">Reply 3</a>):<br/><i>You'd be looking at a per-unit cos...

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by Matt6461
Tue Jul 15, 2014 8:00 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/DocLightning" class="quote" target="_blank">DocLightning</a> (<a href="#3" class="quote">Reply 3</a>):<br/><i>Furthermore, currently most airlin...

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by Matt6461
Tue Jul 15, 2014 7:24 pm
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

RE: Skip A380 Not Enough Option, Do A380X

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/DocLightning" class="quote" target="_blank">DocLightning</a> (<a href="#3" class="quote">Reply 3</a>):<br/><i> Quoting seabosdca (Reply 2): This...

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by Matt6461
Tue Jul 15, 2014 11:37 am
Forum: Technical/Operations
Topic: Skip A380 Not Enough Option, Do A380X
Replies: 61
Views: 12407

Skip A380 Not Enough Option, Do A380X

Since Leeham Co.'s February post about the A380NEO (http://leehamnews.com/2014/02/03/updating-the-a380-the-prospect-of-a-neo-version-and-whats-involved/), I've become convinced that the re-engining option is simply inadequate to make this program commercially meaningful, and that Airbus's only optio...

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by Matt6461
Sat Oct 19, 2013 7:25 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/airmagnac" class="quote" target="_blank">airmagnac</a> (<a href="#28" class="quote">Reply 28</a>):<br/><i>People always forget the systems ! Not...

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by Matt6461
Sat Oct 19, 2013 6:56 am
Forum: Technical/Operations
Topic: A380 Wing High Efficiency Vs Mediocre Aspect Ratio
Replies: 41
Views: 35369

RE: A380 Wing High Efficiency Vs Mediocre Aspect Ratio

Ferpe - thanks for posting this. Can you share your excel sheet? Also, are you using a program? How are you coming to your numbers?

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by Matt6461
Thu Oct 17, 2013 9:37 pm
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/LH707330" class="quote" target="_blank">LH707330</a> (<a href="#25" class="quote">Reply 25</a>):<br/><i>Quoting Matt6461 (Thread starter): Theor...

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by Matt6461
Thu Oct 17, 2013 9:23 pm
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/LH707330" class="quote" target="_blank">LH707330</a> (<a href="#25" class="quote">Reply 25</a>):<br/><i>Quoting Matt6461 (Reply 11): Possible so...

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by Matt6461
Thu Oct 17, 2013 3:37 pm
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

Thanks again for the feedback and welcomes all. Re recertification due to exit doors, I was not aware of this issue. I agree that if the fuse has to be recertified it's undoubtedly better to just do a new VLA and ditch the metal fuse (might be anyway). But Boeing has a ton political clout. If it wer...

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by Matt6461
Thu Oct 17, 2013 6:14 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/rwy04lga" class="quote" target="_blank">rwy04lga</a> (<a href="#15" class="quote">Reply 15</a>):<br/><i>Wow, counselor, that intro was one hell ...

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by Matt6461
Thu Oct 17, 2013 5:09 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Centre" class="quote" target="_blank">Centre</a> (<a href="#2" class="quote">Reply 2</a>):<br/><i> Quoting Matt6461 (Thread starter): The A388 s...

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by Matt6461
Thu Oct 17, 2013 4:47 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Stitch" class="quote" target="_blank">Stitch</a> (<a href="#6" class="quote">Reply 6</a>):<br/><i>An interesting thought exercise, but completel...

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by Matt6461
Thu Oct 17, 2013 4:43 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/ikramerica" class="quote" target="_blank">ikramerica</a> (<a href="#10" class="quote">Reply 10</a>):<br/><i>Quoting Stitch (Reply 6): As already...

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by Matt6461
Thu Oct 17, 2013 4:32 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/tortugamon" class="quote" target="_blank">tortugamon</a> (<a href="#9" class="quote">Reply 9</a>):<br/><i>Its also tough to swallow when all of ...

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by Matt6461
Thu Oct 17, 2013 1:03 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

Tortugamon - One "global" point. I agree that the 747 fuselage is no longer a good design. The issue, as I see it, is that a true VLA needs a bigger fuselage than 777, and 747 is the only candidate for twin engine. With new wings, empennage, and engines, the 747 fuselage built out of Al-Li seems jus...

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by Matt6461
Thu Oct 17, 2013 12:58 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/ikramerica" class="quote" target="_blank">ikramerica</a> (<a href="#3" class="quote">Reply 3</a>):<br/><i>You need an engine of at least 160k th...

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by Matt6461
Thu Oct 17, 2013 12:51 am
Forum: Technical/Operations
Topic: 747-9X: "Back Of The Envelope" Ultimate Twin
Replies: 32
Views: 29132

RE: 747-9X: "Back Of The Envelope" Ultimate Twin

Tortugamon - Thanks for the response. One problem with the 7-10x, I believe, is that it would be a range-constrained aircraft like 787-10. Note that going from 787-9 to -10 costs 1,500 nmi in range - a similar step for the 777-10x would put it at 6,600. MTOW could be increased but then you're using ...

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