spantax
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Stretching The AN-225. HOW?

Thu Apr 28, 2011 5:30 pm

Just a theoretical exercise:

1. Forget about any kind "87 x 84 box" or whatever limitation
2. Use only real/existing components
3. But you can modify wing and/or engines or ad engines
4. Forget about economics, of course

Would it be possible a sort of An-225 with 750-800 t/MTOW "just" by adding a couple of sections 6-7 meters long fore and aft the wing and with new engines? How long can the fuselage be stretched before it relly breaks down?

Engineers warmly welcome!
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wingscrubber
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RE: Stretching The AN-225. HOW?

Fri Apr 29, 2011 7:03 pm

The stretch could be easily achieved with the addition of a lifting canard and tail to alleviate bending loads...

With runways and infrastructure being the key limiting factor for very large aircraft, the sea presents itself as a potential solution. The Beriev Be-2500 is worth a look.

http://www.beriev.com/eng/Be-2500_e/Be-2500_e.html
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etherealsky
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RE: Stretching The AN-225. HOW?

Fri Apr 29, 2011 7:20 pm

Quoting Wingscrubber (Reply 1):

Does a seaplane require larger engines than an wheeled equivalent? I would think more thrust would be needed for T/O & landing to overcome water resistance?
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canoecarrier
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RE: Stretching The AN-225. HOW?

Fri Apr 29, 2011 7:29 pm

Quoting Wingscrubber (Reply 1):
With runways and infrastructure being the key limiting factor for very large aircraft, the sea presents itself as a potential solution.

Welcome to the thread Mr. Hughes.
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glen
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RE: Stretching The AN-225. HOW?

Fri Apr 29, 2011 7:30 pm

Quoting spantax (Thread starter):
Would it be possible a sort of An-225 with 750-800 t/MTOW "just" by adding a couple of sections 6-7 meters long fore and aft the wing and with new engines?

Increasing the size (length) of an aircraft does not help to increase its MTOW. It only helps to increase the possible volume to be loaded.
To increase the MTOW you need to increase thrust (you mentioned engines) and lift (higher speeds or different wing). Besides this you have to strengthen the structure, especially wing and its fixation and the gear (which is already quite impressive on the AN-225!)
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Starlionblue
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RE: Stretching The AN-225. HOW?

Sat Apr 30, 2011 1:00 am

Quoting etherealsky (Reply 2):
Quoting Wingscrubber (Reply 1):

Does a seaplane require larger engines than an wheeled equivalent? I would think more thrust would be needed for T/O & landing to overcome water resistance?

Yes. That's why many larger ekranoplans have several engines used just for take-off. For example the Caspian Sea Monster. I believer the front eight were used for take-off and the aft two for cruise.

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manzoori
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RE: Stretching The AN-225. HOW?

Tue May 03, 2011 7:58 pm

Something like this perhaps?

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Rez
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spantax
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RE: Stretching The AN-225. HOW?

Wed May 04, 2011 4:12 pm

Hi, Thank you to all for your wise (as always) comments, and specially to Rez, who catched really my thoughts with his design (although he forgot the canard mentioned by Wingscrubber....   ). In any case, let's hope that sometime/somehow the second AN-225 will be completed and will fly and be admired as it deserves.

Regards,
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wingscrubber
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RE: Stretching The AN-225. HOW?

Thu May 05, 2011 8:56 pm

Rez - only 8 engines? Here's another, but I can't take credit for it.

http://www.cardatabase.net/modifieda...earch/photo_search.php?id=00000367
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manzoori
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RE: Stretching The AN-225. HOW?

Thu May 05, 2011 9:11 pm

Oh come on... now we're just being plain silly!  

Rez
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SchorschNG
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RE: Stretching The AN-225. HOW?

Fri May 13, 2011 9:03 am

The key issue isn't length but width and height. Lengthening the aircraft will not make it more attractive.
The loading options are severely limited anyways.
There is simply no point ...

If you want to have a huge aircraft, I would think what you can do on A380 basis (thinking for a moment that you can Beluga-rize the fuselage, meaning everything over the wing box is free for change).
From a structural standpoint, passengers are the worst possible payload. [Michael Chun-Yung Niu]
 
bond007
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RE: Stretching The AN-225. HOW?

Fri May 13, 2011 1:12 pm

I guess the big question, is why? Is there a market for it?

It would seem there isn't much market, else we'd see the other AN225 being finished and more on the way.

Companies are building equipment to fit the available freighters, not the other way round. Everything shipped in the AN225 could have been broken down into smaller pieces and/or shipped another method (albeit more expensive perhaps).

If the costs of building them could be justified, we'd have more than one flying.

Jimbo
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fuelfool
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RE: Stretching The AN-225. HOW?

Fri May 13, 2011 7:10 pm

Quoting bond007 (Reply 11):

Totally agree. The AN-225 is a one off plane. It was designed and built to haul something that doesn't exist, anymore. Why would they make a bigger one, when they have not built another like the original?
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