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911 Rod 01-04-2023 07:21 AM

Would be a quick way to go.

stomachmonkey 01-04-2023 08:38 AM

Quote:

Originally Posted by masraum (Post 11887875)
I've always wondered that myself. In the movies, everyone is always ducking/crouching when they walk out from under a helo's blades, but it always looks like the blades are several feet away from them, high enough that walking upright wouldn't be an issue.

Even if the blades are high enough so one could remain fully erect I think for the majority of people the natural instinct would be to duck.

masraum 01-04-2023 08:54 AM

Quote:

Originally Posted by stomachmonkey (Post 11888020)
Even if the blades are high enough so one could remain fully erect I think for the majority of people the natural instinct would be to duck.

Absolutely! Having a 20' "sword" whipping past your head would be pretty scary. But I assume it's gotta be a thing because it's almost universal. I guess the President may not do it when walking to/from Marine 1. I'm not sure. I don't know that I've ever seen a Pres board it on video, and I think those things are big/tall.

911 Rod 01-04-2023 09:34 AM

Quote:

Originally Posted by stomachmonkey (Post 11888020)
Even if the blades are high enough so one could remain fully erect I think for the majority of people the natural instinct would be to duck.

Why do we duck when it's raining?

URY914 01-04-2023 10:15 AM

Quote:

Originally Posted by masraum (Post 11888037)
Absolutely! Having a 20' "sword" whipping past your head would be pretty scary. But I assume it's gotta be a thing because it's almost universal. I guess the President may not do it when walking to/from Marine 1. I'm not sure. I don't know that I've ever seen a Pres board it on video, and I think those things are big/tall.

I don't remember the rotors moving when the POTUS is walking under them. Maybe this is a policy.

stevej37 01-04-2023 11:03 AM

The vanes can take a whole frozen turkey without damage.

rcecale 01-04-2023 11:54 AM

Quote:

Originally Posted by stevej37 (Post 11888195)
The vanes can take a whole frozen turkey without damage.

Negative! While the engine may continue to operate (sub-standard, at best), there is definitely damage done to the vanes, and other parts, inside the engine.

stevej37 01-04-2023 11:57 AM

sorry...had the wrong video. At 1:45 for the bird.

<iframe width="560" height="315" src="https://www.youtube.com/embed/jTKfFxwpbUU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

flatbutt 01-04-2023 12:34 PM

Quote:

Originally Posted by rcecale (Post 11887179)
Nothing new here...

<iframe width="560" height="315" src="https://www.youtube.com/embed/dsA92QnWXdY" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

That's just terrifying. It almost looks like a Looney Tunes sequence in the way that it just sucked him up. I wonder if they Article 15'd the guy.

Seahawk 01-04-2023 12:47 PM

Quote:

Originally Posted by rcecale (Post 11887856)
I was a Final Checker in my Hornet gun squadron. Night ops on the flight deck of a carrier were my favorite (Yeah,maybe I'm a little strange...:cool:). But the adrenaline rush, and the constant need to be 100% aware of your immediate surroundings really kept the blood flowing. The steamier the cats were, the better!

Wow.

Quote:

Originally Posted by flatbutt (Post 11887855)
How high is the risk of being struck by a spinning rotor blade?

Two risks, that are separate: main and tail rotor.

The issue with the main rotors on most helicopters is control authority in pitch, even on the ground, which is why no one ever enters the rotor arc from the front of the aircraft while spinning, always from left or right. The disc can get to five feet on the H-60 forward.

There have been some horrific accidents on small ships involving the main rotor.

Tail rotor pretty self explanatory.

Noah930 01-04-2023 01:33 PM

Quote:

Originally Posted by stevej37 (Post 11888195)
The vanes can take a whole frozen turkey without damage.

Ha. Now you reminded me about the Thanksgiving episode of WKRP in Cincinnati.

stevej37 01-04-2023 01:34 PM

^^^ Smoked and sliced turkey is the best.

Noah930 01-04-2023 01:38 PM

Quote:

Originally Posted by Seahawk (Post 11888302)

Tail rotor pretty self explanatory.

Is a tail rotor strong enough to "suck" you in like a jet intake?

70SATMan 01-04-2023 02:04 PM

Quote:

Originally Posted by rcecale (Post 11887856)
I was a Final Checker in my Hornet gun squadron. Night ops on the flight deck of a carrier were my favorite (Yeah,maybe I'm a little strange...:cool:). But the adrenaline rush, and the constant need to be 100% aware of your immediate surroundings really kept the blood flowing. The steamier the cats were, the better!

Randy

We had an airman back into a C2 prop while it was warming up during night OPs. With all of the launch and recovery noise and movement he didn’t hear it and obviously had a lapse in awareness. Nothing much left above the waist. Would have been so quick, immediate lights out. I had buddies in Crash and Salvage that had to do the FOD walk down after that and I had an outboard antenna right off the catwalk that I had to wash off. They parked and roped off the C2 in the hangar Bay until we got back in port. Couldn’t touch it until the investigation was completed.

flatbutt 01-04-2023 02:26 PM

Quote:

Originally Posted by Seahawk (Post 11888302)
Wow.



Two risks, that are separate: main and tail rotor.

The issue with the main rotors on most helicopters is control authority in pitch, even on the ground, which is why no one ever enters the rotor arc from the front of the aircraft while spinning, always from left or right. The disc can get to five feet on the H-60 forward.

There have been some horrific accidents on small ships involving the main rotor.

Tail rotor pretty self explanatory.

Five!? Holy moly. At idle? Forgive but I know nothing of helo ops.

rcecale 01-05-2023 05:49 AM

Quote:

Originally Posted by 70SATMan (Post 11888367)
We had an airman back into a C2 prop while it was warming up during night OPs. With all of the launch and recovery noise and movement he didn’t hear it and obviously had a lapse in awareness. Nothing much left above the waist. Would have been so quick, immediate lights out. I had buddies in Crash and Salvage that had to do the FOD walk down after that and I had an outboard antenna right off the catwalk that I had to wash off. They parked and roped off the C2 in the hangar Bay until we got back in port. Couldn’t touch it until the investigation was completed.

"Swivel head" was the term we used. If your head wasn't constantly in motion, constantly scanning the area 360 degrees around you, you were just an accident waiting to happen. There was no room for complacency on the flight deck, and mistakes were very costly!

rcecale 01-05-2023 05:58 AM

That's a nice video, but having worked in the industry, around jet engines for 20 years, I've seen my fair share (up close and personal) of what a real bird ingestion can do to an engine.

Quote:

Originally Posted by stevej37 (Post 11888253)
sorry...had the wrong video. At 1:45 for the bird.

<iframe width="560" height="315" src="https://www.youtube.com/embed/jTKfFxwpbUU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>


masraum 01-05-2023 06:43 AM

Quote:

Originally Posted by Seahawk (Post 11888302)
Wow.



Two risks, that are separate: main and tail rotor.

The issue with the main rotors on most helicopters is control authority in pitch, even on the ground, which is why no one ever enters the rotor arc from the front of the aircraft while spinning, always from left or right. The disc can get to five feet on the H-60 forward.

There have been some horrific accidents on small ships involving the main rotor.

Tail rotor pretty self explanatory.

Yep, tail is obvious. Thanks for the explanation on the main. I'd always wondered. This makes sense. I don't normally think about the rotors being anything other than parallel to the helicopter.

Rikao4 01-05-2023 10:17 AM

Quote:

Originally Posted by masraum (Post 11888867)
Yep, tail is obvious. .

you would think..
but many a crewmember has tackled folks who ..
jump out before being cleared and go towards the rear...

saw same when a CMS jump out ..
before the shirts cleared us..
wham ..down he went..
then the Airboss had a piece of his a$$$..
something he hadn't experienced in years for sure..



Rika

Seahawk 01-05-2023 11:05 AM

Quote:

Originally Posted by flatbutt (Post 11888400)
Five!? Holy moly. At idle? Forgive but I know nothing of helo ops.

Interesting tidbit, Flat: Modern helos do not idle in terms of rotor speed...the main rotor spins at the same RPM when the helicopter is on the ground or in the air when the engines are engaged.

The term is Nr. When the pilot increases collective (essentially the gas pedal) to go fly, the Nr remains constant throughout the flight - at least I always hoped so:cool:

In the Navy H-60 the Nr is 258 RPM.

Nr below the constant RPM is called "drooping". Drooping is bad.

The only time the Nr changes is on shutdown, at least in the Navy. I can see the shutdown checklist as I type:D


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