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The first issue with airplanes is they are stupendously, freakishly light. Any random American freight diesel locomotive weighs more than a 747-400. Trains rely on this mass to provide the downforce to keep them engaged to the railhead. So your vehicle would need to do something to replace this downforce; for instance have a tubular or I-beam rail which ...


6

The need for throttles is to provide a linkage to the carburetor/throttle body in the age when everything was mechanical. The throttle in older airplanes directly controlled the air-fuel mixture allowed into the intake manifolds. If electric motors were used, the throttles would have been attached to mechanical rheostats. In the age of computer controlled ...


5

That is a complicated process. You need: A positive mold (mandrel) for the canopy. A negative mold for the canopy frame. For a single prototype you can also use the unfinished fuselage itself. A fuselage mold with a molded window sill. First the fuselage positive mold core is built. From that the negative mold is taken, but also a negative mold only for ...


4

A lifting tail just means lower static stability. You are correct, flying in the downwash of the wing makes the tail less efficient. But that does not mean it is all bad: Since downwash increases with lift coefficient, the tail effectively sees a smaller angle of attack variation than the wing, so it maintains a healthy margin from stalling even while the ...


4

It's called the Ampaire Tailwind, and as this article explains, it only exists in scale models and renderings at the moment.


3

Have a look at the Cri-Cri propeller and jet versions. Yes, jets can be mounted near the nose, but the plane must still balance at within its specified CG range. This is why removing the engine in front and placing jets in back is out (unless you want to really go crazy and mount a Gatling in the front). Remember, it must balance. However, at Cessna (152) ...


2

Ground effect is measured using the non-dimensional height parameter 'h/c', i.e. the height above ground divided by the chord length. By increasing the chord length, the height of the maximum efficiency height is raised, as the location of the h/c does not change. Increasing the span also adds efficient lift due to aspect ratio effects, however creating too ...


2

You asked for it, you got it: The x number of small non-certified engines will not add redundancy, they are in fact very noisy, and terribly uneconomical (as a reply to your comment). The good old piston engine is extremely reliable compared to these mini jets. Certified GA pisyon engines are tried and tested, and you can bet your mamas behind that they ...


2

what about just 1 throttle, and 2 or 3 backup throttles for redundancy as they are electronic and could easily be blown You wouldn't need separate levers for that: just have one lever driving two or more throttle position sensors. You might want separate levers for the left-side and right-side engines, so you can use differential throttle control to steer ...


1

From 'Flying' magazine, July 1962.


1

It is not actually true that ... the tailplane configuration ... requires the main wing to provide higher lift than the weight of the plane itself What matters for stability is that the change in lift moment of the tail should be greater than that of the main wing; the absolute value of its lift is not relevant. The lifting tail has been well ...


1

Focusing on the aircraft in the picture, lifting tail aircraft are essentially bi-planes. The single lifting wing has proved to be more efficient long ago. Simple adjustment of the CG removes the need for a lifting tail. This plane could be flown that way. It is the job of the tail to set the wing at a given AOA, using aerodynamic force in flight to hold ...


1

This particular idea has been abandoned for several reasons. Tip-jets that put engines on the tips themselves - "hot" tip-jet, unlike "cold" tip-jet where a central turbine sends compressed air through the blades to be ejected at the tip - cause lots of drag, in addition to being very noisy. While the noise problem may have been lessened ...


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