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Old Apr 10, 2007, 01:13 AM
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NAS Whidbey Island/Oak Harbour, WA
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Anyone heard of this concept plane?

I tried using the search function but it is currently down.

I figure some of the RCG community is aware of this aviation developement, if not a direct contributer/team member outright. It's news to me

link:http://www.aviationblog.com/2007/04/...-aviation.html

Reminds me of the one-man submersible dolphin/racer from "Seaquest" and the "Bongo" from SW:Phantom Menace.
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Old Apr 10, 2007, 07:43 AM
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Punta Gorda, FL
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They fly with poorer soaring. They need lots and lots of power.
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Old Apr 10, 2007, 11:59 AM
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short wingspan=lots of induced drag at normal GA speeds, no matter how pretty the curves are.
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Old Apr 10, 2007, 04:42 PM
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Aberdeen
Joined Mar 2006
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It's got a lot of X-24B about it:


The X-24B flew about 35 years ago and was a development step toward the space shuttle, so this design is nothing new... It may have a lot going for it at hypersonic speeds but at normal flying speeds the lifting body / low aspect ratio wing design is very inefficient... I can only think this is some form of publicity stunt.

Steve
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Old Apr 10, 2007, 05:36 PM
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Punta Gorda, FL
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The plane, with no power, flies like a brick. I will crash except for a landing flare near the ground.

Think about thrust bigger than weight and no failure thrust with flying.

It mainly flies on thrust.
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Old Apr 10, 2007, 06:23 PM
Lift is cheap - Drag sucks
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Socorro, NM
Joined Jul 2004
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Yeah, but it really looks neat!!!
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Old Apr 10, 2007, 07:16 PM
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Palmdale, CA
Joined Oct 2000
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Just don't contribute to any plea for funds.
This is a money scam, more than anything else.
The X-24B came down like an anvil from 100,000 feet.. on the ground in about 2 minutes.
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Old Apr 10, 2007, 08:56 PM
greg
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somerset, nj
Joined Feb 2005
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this concept plane looks more like a submarine than an aircraft. if you like cool, you might be interested in the x-36 tailless research vehicle.
http://www.fas.org/man/dod-101/sys/ac/x-36.htm

the x-24 is one of the last of the early lifting bodies that demonstrated the concept of a controllable decent vehicle rather than being a typical aircraft able to gain altitude. at the time, space vehicles decended on parachutes. liftiing bodies also proved that such a vehicle could land at a high angle of attack without any boost (rockets) to make up for the extra drag. both these concepts are critical in the space shuttle.

i never understood what lifting bodies were until i read "wingless flight" by dale reed when it was posted electronically on the nasa dryden web site. the book describes the original concept tested with models, early evaluation of the vertical control surfaces using an early flight simulator, and tow testing behind a modified pontiac.
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Old Apr 11, 2007, 08:44 AM
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The concept can work. It's called a Smart Fish. I took this photo at Aspach 2002—yes, that was 5 years ago. And it certainly doesn't fly like NASA's X-24B brick. This photo is from my Aspach 2002 report in The E Zone's archive.

Here is what I wrote about the model:

Here’s a bunch of Smart Fishes. The EDF is a fiberglass ARF kit by Rotschi (http://www.smartfish-model.com) and costs about €570 euros, or about US$600. Measurements: wing span 77 cm (30.31 in), length 1 m (39.37 in) and weight 2.5 kg (5.5 lbs). Power (used in Ulf Herder's): Lehner 15-30-6Y in a WeMoTec 480 Mini Fan, Schulze Future 18.61 ESC and 16 x Panasonic 3000 NiMH. Flight time is 6 minutes.

Unfortunately that link is 5 years old and today it directs you to an unrelated site with the same URL. (So I assume the original Smart Fish URL was sold.) Ditto for the [same] link posted in back in November 2002 about the Smart Fish in the EDF Discussion Column.
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Old Apr 11, 2007, 10:25 AM
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Palmdale, CA
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Model wing loadings aren't any indication of how the full-scale will (won't) work.
It's a brick/anvil/anchor.
Suitable for a re-entry vehicle, if that.
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Old Apr 11, 2007, 02:53 PM
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Cant hold altitude, she's breaking up, she's breaking up...Col. Steve Austin, a man barely alive...Dah nah nah na, na na nah nah na na nah na nuh
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Old Apr 11, 2007, 11:27 PM
B for Bruce
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The 'Wack, BC, Canada
Joined Oct 2002
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Low aspect delta wings with jet engine spool up times = lots of dead gen av pilots.

This is just not a good idea for sport aviation. Yes it looks sexy as heck but it will not be a forgiving design at general av type speeds.
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Old Apr 12, 2007, 02:12 AM
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Col. Austin crashed the A model of the X-24, but they say only one was built. That crash looked catastrophic.
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Old Apr 12, 2007, 05:40 AM
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Hmm, dunno, for a pure delta I'd agree, but this has tail feathers, much like a Mig21. With that shape I'd be most concerned with vertical surface blanking at high AOA, otherwise it should be pretty much like anoy other low wing loading delta, mushing a bit instead of snapping on a stall, and possibly keeping control after the stall.
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Old Apr 12, 2007, 03:56 PM
greg
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somerset, nj
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it was actually the m2-f2, not an x-24
http://www1.dfrc.nasa.gov/Gallery/Ph...L/E-16731.html

the nasa site has several movies showing the various lifting bodies: m2-f1, m2-f2, m2-f3, hl-10, x24a and b.

notice also that there are no wings projecting outward, horizontal from the body that might burn up on re-entry. for those interested, the book is still online from the nasa technical report server
http://ntrs.nasa.gov/archive/nasa/ca...1998082126.pdf
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