1. Retreating blade stall
2. Dynamic/Static rollover
3. Ground resonance
4. Loss of tail-rotor effectiveness (could be avoided by having a coaxial contra-rotating main rotor)
5. Dynamic stall
6. Vortex ring state
7. Vibrations (a lot)
8. Crashworthiness
9. Noise
10. Engines (higher power, lower weight and low fuel consumption)
11. Performance (blade design, powertrain,
12. High-altitude performance
13. They can't glide (they can autorotate though). Is a "lifting body" fuselage possible?
14. Cost (helos are extremely expensive)
15. No catastrophic failure warnings (basically they lack the alarms commonly located on fixed wings)
bump
How can these helicopter problems be solved/eliminated?
>1. Retreating blade stall
>2. Dynamic/Static rollover
>3. Ground resonance
>4. Loss of tail-rotor effectiveness (could be avoided by having a coaxial contra-rotating main rotor)
>5. Dynamic stall
>6. Vortex ring state
>7. Vibrations (a lot)
>8. Crashworthiness
>9. Noise
>10. Engines (higher power, lower weight and low fuel consumption)
>11. Performance (blade design, powertrain,
>12. High-altitude performance
>13. They can't glide (they can autorotate though). Is a "lifting body" fuselage possible?
>14. Cost (helos are extremely expensive)
>15. No catastrophic failure warnings (basically they lack the alarms commonly located on fixed wings)
Enclose the rotors in a shroud and move them to the side. Have forward flight be accomplished by fixed turbofan engines. Your fixed turbofans pneumatically drive the rotors via a shaft-shutoff-valve system during vtol mode. That solves most of your problems.
bump2
By changing the laws of physics
>1. Retreating blade stall
Hydrodynamic articulated rotor system
>2. Dynamic/Static rollover
Use fuel as dynamic ballast
>3. Ground resonance
Jump jets
>4. Loss of tail-rotor effectiveness
Backup rocket engines to counteract main rotor torque. A solid-fuel motor fires instantly upon loss of the rotor to stop spin temporarily while the liquid-fueled motor starts and then takes over.
>5. Dynamic stall
Hollow rotors with internal air bleed system
>6. Vortex ring state
Analog mechanical computer that monitors vibration in the rotor hub and corrects the collective pitch
>7. Vibrations (a lot)
Rubber mounts on the engine and put balance weights on the handlebars.
>8. Crashworthiness
Side-ejection seats and parachutes
>9. Noise
feathered trailing edges of rotor blades
>10. Engines (higher power, lower weight and low fuel consumption)
Hydrazine
>11. Performance
Hydrazine
>12. High-altitude performance
Liquid Oxygen
>13. They can't glide
In an emergency when auto-rotation isn't possible a steerable wing-type parachute could be deployed after explosively severing the rotors
>14. Cost (helos are extremely expensive)
This is a problem with all aircraft, it turns out that careful maintenance and attention to detail costs money.
>15. No catastrophic failure warnings
Psychics
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I've already wasted enough time on that low-effort OP. If you want more replies then contribute more yourself. It's no fun if I'm the only one talking.
>Hydrodynamic articulated rotor system
You mean hydrodynamic bearings? Why?
>Use fuel as dynamic ballast
How?
>Rubber mounts on the engine and put balance weights on the handlebars.
What if it's turbine powered like most helos?
Believe it or not, tilts solve a lot of these issues. Good sensors and a modern fly-by-wire system can protect against VRS (which is usually encountered by inadvertently exceeding the flight envelope in a descent).
One possible alternative might be some sort of rotodyne, using bypass air from the engine flowing through a rigid/hollow rotor instead of pulsejets on the rotor tips (kinda like NOTAR). It still wouldn't have the performance of a tilt, though, because fixed wings simply have lots of advantages over rotary wings.
replace them all with aerogavins
archer evtol with gas generator because flying on only batteries is retarded (my take as a layman)
>15. No catastrophic failure warnings (basically they lack the alarms commonly located on fixed wings)
What does this mean?
It's relatively simple for an airplane to detect if a stall is imminent so aircraft have had stall warning systems (and others) for a very long time. That's not so easy to do in a helicopter because of the complexities of the rotor. The computer could certainly detect some kinds of imminent problems but probably not with enough advance warning time to the pilot to do any good.
Helicopter flight dynamics are too complicated for a system like this to be remotely accurate.
>t. helicopter pilot
That's a huge issue. The crash rates are so high
What the fuck
All features, not bugs.