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Grumman G-674 "Nutcracker" folding-fuselage VTOL fighter concept
- Thread starter overscan (PaulMM)
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Matej
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Similar projects based on the F-16 and F-17:
Related topic:
And the patent mentioned by Paul and I:
Related topic:
And the patent mentioned by Paul and I:
- http://www.google.com/patents/US3966142
Aviation Week & Space Technology September 20, 1976 pp. 16-17
Aviation Week & Space Technology September 20, 1976 pp. 18-19
Aviation Week & Space Technology September 20, 1976 p. 15
Aviation Week & Space Technology March 01, 1976 p. 12
Aviation Week & Space Technology September 20, 1976 pp. 18-19
Aviation Week & Space Technology September 20, 1976 p. 15
Aviation Week & Space Technology March 01, 1976 p. 12
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Is that documentation on the Nutcracker I see there? Any chance of three-views, dimensions, performance, weights, etc?
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Bear with me for a moment but, how on earth can that ever work? Can anyone demonstrate the process? Not wanting to be funny or nasty but I cannot see that system ever working.
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It works by maintaining the thrust vector through the center of mass.
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How can the thing take off and land vertically with a bendy fuselage and the undercarriage where it is in those pictures? I cannot see it being a starter even. Sorry.
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During the JSF competition, a lot of people outside of Lockheed Martin said the lift fan/gimbaled nozzle VTOL system would never work (before it did).
The sky is falling types always come out of the woodwork when someone is trying to do something new. Opinions from those outside the programs are usually just wrong.
The sky is falling types always come out of the woodwork when someone is trying to do something new. Opinions from those outside the programs are usually just wrong.
The airplane hooks into the probe first. Then the landing platform is raised up so the nose landing gear rests on it. Note that its aft section is initially hinged downward like the aft fuselage so the main landing gear can touch it. The aft section of the platform is then pivoted to horizontal as the aft fuselage pivots up to horizontal. Presumably the main landing gear wheels are somehow restrained to the hinged platform when it is vertical so the engines can be shut down while it is raised (the patent application was a little vague in that regard).
Also see https://patents.google.com/patent/US3966142A/en
Also see https://patents.google.com/patent/US3966142A/en
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What scales are these models?
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Looks like the same intriguing Model of Grumman G-674 Nutcracker & SHIMRIT Hydroplane launch vessel as posted by allysonca. If so, I just didn't appreciate the size of the model itself!
"Wood, fiberglass and medal model with accessories, including hydroplane and aircraft models, on wooden stand, hydroplane dimensions 37 x 6-3/4 x 12 inches"
(Source: https://www.lotsearch.net/lot/nutcracker-aircraft-and-shimrit-hydroplane-launch-vehicle-47376037)
Regards
Pioneer
"Wood, fiberglass and medal model with accessories, including hydroplane and aircraft models, on wooden stand, hydroplane dimensions 37 x 6-3/4 x 12 inches"
(Source: https://www.lotsearch.net/lot/nutcracker-aircraft-and-shimrit-hydroplane-launch-vehicle-47376037)
Regards
Pioneer
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Asking again...
Is that documentation on the Nutcracker I see there? Any chance of three-views, dimensions, performance, weights, etc?
These articulated VTOL plane ideas are all kinds of awesome. I'm having trouble picturing how the transitions in flight to and from vertical are supposed to happen, all sorts of moments working on the whole there. I guess some enterprising team could at least build a UAV prototype, with modern tech the challenge can't be insurmountable and the exercise should indicate whether there's further potential. The whole thing also reminds me of another landing method, namely biomimetic perching, perhaps even a more daunting challenge.
The CG will auto align with the lift vector in vertical mode if there is enough degree of freedoms built in the articulation and speed is kept low.
That's exactly the same configuration of an outside cargo hanging under a line (the hook is sliding inside a hoop to cancel most of the loads resulting from both system aligning each others).
The line take out most of the dynamic forces that comes with speed. An articulated link can't do that easily (often rigid links). Hence speed has to be kept low.
That's exactly the same configuration of an outside cargo hanging under a line (the hook is sliding inside a hoop to cancel most of the loads resulting from both system aligning each others).
The line take out most of the dynamic forces that comes with speed. An articulated link can't do that easily (often rigid links). Hence speed has to be kept low.
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Now i know where Wakanda's VTOL craft might have inspired from.
Agreed - which raises an interesting question: Is this a separate design that Grumman was working on for Israel?
BullpupRafale
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I wouldn't be surprised if this jet inspired Macross series...
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Also reminds me of the Big Foot and Hot Shot walker/jets in Sonic Adventure 2.
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For completeness, this was probably HYD-2, for the USN. We discussed it here:
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Did they plan to electronically stabilize the hook/refuelling basket ala. British Skyhook? Skyhook was a 1980s project to land a Harrier VTOL jet fighter on a frigate. The plan was to hover the Harrier alongside the frigate and have it dock on a gyro-stabilized crane that incorporated a re-fuelling hose and hooks. Once hooked, the crane would swing the Harrier inboard and lay it on a cradle for re-arming (bombs and rockets) or maintenance. I suspect that Skyhook failed because they could not convince 1980s vintage electronics to think fast enough to zero out the sip's rolling, pitching and yawing in rough seas. A ship can roll 30 or 40 degrees in heavy seas.
Nutcracker could eliminate all that fancy fuselage articulation simply by hanging a visual target above the basket. That way the pilot would lay on his back aiming for a target (e.g. tennis ball) suspended overhead ... er ... straight in front of his windshield. The entire fuselage would point straight up during landings.
Nutcracker could eliminate all that fancy fuselage articulation simply by hanging a visual target above the basket. That way the pilot would lay on his back aiming for a target (e.g. tennis ball) suspended overhead ... er ... straight in front of his windshield. The entire fuselage would point straight up during landings.
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Maybe. But the jets in Macross were far, far more elaborate. See the book: Macross Perfect Memory (text in Japanese).
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