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Posted: 2/8/2016 12:06:29 AM EDT
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Posted: 2/8/2016 12:17:38 AM EDT
[#1]
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Posted: 2/8/2016 12:29:54 AM EDT
[#2]
Wow that must be the "Jesus nut" up on top. Cause if you lose that nut its o Jesus...
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Posted: 2/8/2016 1:38:02 PM EDT
[#3]
You'd see basically the same thing if you stuck a camera to the top of one of ours. That's how a helicopter works, the blade pitch angle is constantly changing as it rotates.
That amount of fatigue that generates is why we faithfully perform scheduled inspections, and presumably the Russians do to. If anything in the rotor mast assembly breaks or fails in flight, it's pretty much game-over. |
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Posted: 2/8/2016 2:14:51 PM EDT
[#4]
Here's a better one in slow motion where you can really see just how much that blade moves. [youtube] http://www.youtube.com/watch?v=srjbnvTWRJI [/youtube] Here's on of a blade stalling: [youtube] http://www.youtube.com/watch?v=p4VLhnTZpb8 [/youtube] |
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Posted: 2/8/2016 8:39:08 PM EDT
[#5]
Yup, aint it fun?
There are certain parts of rotary wing flight that I push to the back of my mind. But damn helicopters are so fucking fun to fly. |
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Posted: 2/8/2016 10:03:33 PM EDT
[#6]
Quote Historywould that be retreating blade stall? i'm guess i don't know what other conditions the blade would stall, unless it was some really abrupt inputs? |
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Posted: 2/9/2016 7:44:17 AM EDT
[#7]
Every night when I go to sleep I thank God that my kid has a yellow handle to yank if things ever go south.
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Posted: 2/9/2016 12:45:40 PM EDT
[#8]
Quote HistoryQuoted:
would that be retreating blade stall? i'm guess i don't know what other conditions the blade would stall, unless it was some really abrupt inputs? Quote HistoryQuoted:
would that be retreating blade stall? i'm guess i don't know what other conditions the blade would stall, unless it was some really abrupt inputs? Is vortex ring state considered stalled? |
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Posted: 2/9/2016 2:33:54 PM EDT
[#9]
Why does the pitch of the blades change like that in flight?
I can see that the blade going opposite of travel would have a different lift component than the blade going in the direction of travel based on relative airspeed. Is that it? |
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Posted: 2/9/2016 2:51:10 PM EDT
[#10]
The advancing blade is moving much faster than the retreating blade, which would cause it to create more lift and roll the aircraft if it wasn't compensated for.
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Posted: 2/9/2016 2:51:49 PM EDT
[#11]
Quote HistoryQuoted:
Why does the pitch of the blades change like that in flight? I can see that the blade going opposite of travel would have a different lift component than the blade going in the direction of travel based on relative airspeed. Is that it? Start here
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Posted: 2/9/2016 2:55:04 PM EDT
[#12]
Quote HistoryQuoted:
The advancing blade is moving much faster than the retreating blade, which would cause it to create more lift and roll the aircraft if it wasn't compensated for. That's what I thought, thanks. |
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Posted: 2/9/2016 5:12:06 PM EDT
[#13]
Quote HistoryQuoted:
Is vortex ring state considered stalled? Quote HistoryQuoted:
Quoted:
would that be retreating blade stall? i'm guess i don't know what other conditions the blade would stall, unless it was some really abrupt inputs? Is vortex ring state considered stalled? some of my rc helo's are really susceptible to VRS and drop like stones if i don't get them out of the rotor wash quick. VRS, according to wikipedia would be a stall, since the blades stall from the hub out to the tips in the dirty air. I think i've had 1 rc encounter retreating blade stall, it leaned right, tucked over and lawn darted when i was doing a high speed run with it. I didn't know what happened at the time since i was pretty new to rc heli's and it dove to the right since that model had a CW blade rotation |
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