What is low-G pushover?

What is low-G pushover?

LOW-G PUSHOVERS – EXTREMELY DANGEROUS. Pushing the cyclic forward following a pull-up or rapid climb, or even from level flight, produces a low-G (weightless) flight condition.

What is low G condition helicopter?

Low-g condition is a phase of aerodynamic flight where the airframe is temporarily unloaded. The pilot—and the airframe—feel temporarily “weightless” because the aircraft is in free-fall or decelerating vertically at the top of a climb. It may also occur during an excessively rapid entry into autorotation.

What is aircraft pushover?

The pushover pullup maneuver is executed by pushing the aircraft’s nose down an incremental angle of attack from straight-and-level flight, pulling the nose up to the same incremental angle of attack above straight and level, and finally ramping the nose back to the original straight-and-level angle of attack.

What is mast bumping on a helicopter?

Mast bumping is contact between an inner part of a main rotor blade or a rotor hub and the main rotor drive shaft (or ‘mast’). Serious mast bumping in flight usually results in the helicopter breaking up in flight, which is fatal for those on board.

What does low-G feel like?

“In weightlessness, you are effortlessly floating, because all of the acceleration forces on you add to zero. The most comparable feeling is floating in water without the sensation of water on your skin. Because you feel so light, you can move about with the slightest amount of effort.

How many Robinson helicopters have crashed?

Of the 13,000 helicopters Robinson has sold, 1,200 have crashed. Since 1982, 600 people have died in Robinson helicopter crashes.

When can mast bumping occur?

Mast bumping occurs when main rotor hub of heliopter contacts and damages the main rotor mast. The consequence can include a rotor separation from the mast. Mast bumping is peculiar to two-blade rotor systems such as many Bell and Robinson helicopters.

What is negative G in aircraft?

Negative “G” forces happen when the pilot pushes forward on the control stick or control yoke hard enough that they will actually be pulled out of the their seat if not strapped in. Basically the aircraft is nosing down faster than the gravity is pushing the pilot in the seat.

What causes blade slap?

Blade slap appears to be caused by a blade passing through the tip vortex shed by another blade in its proximity. This has been simulated on a rotor whirl stand under controlled conditions and the effect of various parameters investigated.

What is a mast moment?

When a pilot makes a cyclic movement causing the main rotor disc to tilt, the fuselage wants to follow. In flight, with a rigid rotor the mast bending moment is low. Because large cyclic displacements on the ground have the potential to damage the mast assembly, a mast moment indicator (MMI) is installed.

Should I put a low-G on my ukulele?

THE BENEFITS OF LOW G With a low G-string, that same ukulele would now give you a range of 2 ⅙ octaves, from G3 to A5. The other benefit of using low G tuning is that it makes the chords you play sound more full and warm overall, since you’re adding more depth with the lower G-string.

What is low-g condition?

Low-g condition is a phase of aerodynamic flight where the airframe is temporarily unloaded. The pilot—and the airframe—feel temporarily ” weightless ” because the aircraft is in free-fall or decelerating vertically at the top of a climb.

What is a low G on a ukulele?

A low-G is a replacement string that you can put on your ukulele to change the pitch of the G-string down one octave. Standard re-entrant tuning goes high-low-high, like this (watch the notes): Changing to a low-G moves the first note down one octave and keeps the strings ascending all the way through the tuning.

What happens when you change a high note to a low-G?

Changing to a low-G moves the first note down one octave and keeps the strings ascending all the way through the tuning. This is called linear tuning. The pitch you can tune each string to has to do with its physical mass.

What happens when you tune a guitar to a low G?

Changing to a low-G moves the first note down one octave and keeps the strings ascending all the way through the tuning. This is called linear tuning. The pitch you can tune each string to has to do with its physical mass. All things being equal, a thicker string can be tuned lower than a thin one.