Random UnAerodynamic Cars and Trucks Thread

[ChopStix]

Yeah I wasn't going there since its a car forum, but yeah I agree...

[Piotrsko]

Ornithopter?

Autogyro.

[freebeard]

I stand corrected.

Too much Dune and John Carter of Mars?

[cRiPpLe_rOoStEr]

Usually I don't like the idea behind an autogyro, but that one looks cool.

[freebeard]

It's Okay, I suppose. Some of the Pitcairns were as well:

https://external-content.duckduckgo.com/....

Here's Miyazaki's take, the Lupin III:


https://i.ebayimg.com/images/i/31121...-1/s-l1000.jpg

[Piotrsko]

Ok I'm at it again:
pretty sure the Miyazaki lupine isnt an autogyro. Looks more like a ramjet powered helicopter, hence the tubey looking things on the tips of the blade. Only other reason to put stuff at the ends is to add mass for tip speed control with abrupt maneuvers.

Looking at it again, I see control levers for the hub. Definitely a 'chopper

Never too much Dune. Not a john carter fan

[freebeard]

Originally Posted by DDG

Rotorheads/Gimbal - gyroplane
Rotorheads/Gimbal
Rotorheads/Gimbal. In the world of rotorcraft there are a few different rotorhead arrangements that can be employed. The most common types of rotor designs are semi-rigid, fully rigid, fully articulated and soft in plane. These rotor designs can be found on helicopters but only a few of these are used on gyroplanes.

An 'elicopter would have cyclic and collective pitch. More complex.

Pitcairn-Cierva PCA-1A | National Air and Space Museum
https://airandspace.si.edu/collectio...-cierva-pca-1a
After Pitcairn realized that the solution to the rotor spin-up problem was a power-takeoff controlled by a clutch, he modified the PCA-1A to incorporate a much lighter tail structure with a single vertical stabilizer to replace the original design.
_______________

1941 Pitcairn PA-39 Autogiro - N3908
https://www.eaa.org/en/eaa-museum/mu...togiro---n3908
However, many gyroplanes are equipped with pre-rotators that divert engine power to give the rotor a head start, and some are even powerful enough to do what's called a jump takeoff. In 1929, legendary aircraft designer Harold Pitcairn partnered with de la Cierva to build Autogiros under license in the United States.

The Focke-Wulf Triebflügel used rotor-tip ramjets, but that design can't self-start.

I'm not going to second-guess Hayao Miyazaki. I'd read John Carter before Star Wars ever came out.

[RedDevil]

The Lupin III has ramjets but is an autogiro.
The ramjets won't do anything until the blades are spinning, so it cannot lift off vertically unless it has an engine that powers the main rotor while on the ground.
Once airborne the engine can no longer power the rotor as it has nothing to counteract the torque of the main rotor.
Autogyro operation or ramjets don't cause that kind of torque.

[freebeard]

I haven't seen the anime it appeared in, but my impression is that helicopters fly with the rotor disk tilted forward to assist the cyclic pitch in forward thrust and autogygros tilt backward to harvest thrust for lift. They ...auto-rotate.

An unaerodynamic car. Those front fenders cost 5mph top speed:



edit:
Well Youtube took pity and recommended an old Mother's Basement episode that reviewed Castle of Castle of Cagliostro, and at https://youtu.be/GgHax-K63Gs?t=364 it's referred to as a 'steampunk helicopter' in a scene where it hovers against the castle roof.

I'd say compound helicopter, or gyrodyne:

A gyrodyne is a type of VTOL aircraft with a helicopter rotor-like system that is driven by its engine for takeoff and landing and also includes one or more conventional propellers to provide forward thrust during cruising flight. Lift during forward flight is provided by a combination of the rotor, like an autogyro, and conventional wings. Due to a number of issues, there is some confusion over the term "gyrodyne", and the terms compound helicopter and compound gyroplane are frequently used to describe the same design. The gyrodyne is one of a number of similar concepts which attempt to provide helicopter-like low-speed performance and conventional fixed-wing high-speeds, including tiltrotors and tiltwings.

Or heliplane. The first flight of the Sikorsky–Boeing SB-1 Defiant was March of 2019.

Compared to conventional helicopters, the counter-rotating coaxial main rotors and pusher propeller offer a 100-knot (115 mph; 185 km/h) speed increase, a 60% combat radius extension, and 50% better performance in high-hot hover performance.

[Piotrsko]

Thought so.
However I recall an autogyro experiment that had a set of jets on the blades that could "hover" for a short while.

Gyrodyne is acceptable also.