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Old 08-29-2009, 06:19 AM   #3886
kfsinc
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Can someone please explain the pics of those rotors to me. I'm sure it's some sort of camera phenomenon. 'cause the rotor bend doesn't look symmetrical as I would expect it to -- but I sure wouldn't expect them to bend that much either

TIA

kfs
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Old 08-29-2009, 07:14 AM   #3887
Elvis70
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It is an illusion

Quote:
Originally Posted by kfsinc
Can someone please explain the pics of those rotors to me. I'm sure it's some sort of camera phenomenon. 'cause the rotor bend doesn't look symmetrical as I would expect it to -- but I sure wouldn't expect them to bend that much either

TIA

kfs
The longer the shutter is open the more the blades appear to curve. They don't curve to any degree perceptable to the human eye, just a camera trick.
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Old 08-29-2009, 07:19 AM   #3888
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Quote:
Originally Posted by Elvis70
The longer the shutter is open the more the blades appear to curve. They don't curve to any degree perceptable to the human eye, just a camera trick.
There's also forward motion. If the helicopter were hovering and stable, the body would be in focus and the blades would appear blurred.
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Old 08-29-2009, 07:22 AM   #3889
Elvis70
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That too

Quote:
Originally Posted by ian408
There's also forward motion. If the helicopter were hovering and stable, the body would be in focus and the blades would appear blurred.
Good point. I have photographed them in a hover and seen some serious blade bending. I tend to use the action setting on my camera for helicopters in cruise and the shutter is much quicker and minimizes the blade warpage illusion.
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Old 08-29-2009, 08:04 AM   #3890
ian408
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Quote:
Originally Posted by Elvis70
Good point. I have photographed them in a hover and seen some serious blade bending. I tend to use the action setting on my camera for helicopters in cruise and the shutter is much quicker and minimizes the blade warpage illusion.
Some digitals don't have shutter in the normal sense. They just turn the sensor on and capture. That can have some interesting effects too.
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Old 08-29-2009, 08:49 AM   #3891
Dfender110
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hello from the GOM

Hey, cant believe i have not found this thread before. Guess I was flying more than surfing on here before now.

I am a pilot with Air Logistics in the GOM. I am currently flying 407s and 206s. (when there is a job for me) That is not a complaint, enjoying a break.

just got done with a 2000 mile adventure to Ohio and back

anyway good to meet you all





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Old 08-29-2009, 10:46 AM   #3892
emerson.biguns
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Quote:
Originally Posted by ian408
Some digitals don't have shutter in the normal sense. They just turn the sensor on and capture. That can have some interesting effects too.

We've got the same problems with our blades:




.
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Old 08-29-2009, 10:51 AM   #3893
DakarNick
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Quote:
Originally Posted by emerson.biguns
We've got the same problems with our blades:




.
Quite the coning angle
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Old 08-29-2009, 01:22 PM   #3894
Kaumajet
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Quote:
Originally Posted by kfsinc
Can someone please explain the pics of those rotors to me. I'm sure it's some sort of camera phenomenon. 'cause the rotor bend doesn't look symmetrical as I would expect it to -- but I sure wouldn't expect them to bend that much either

TIA

kfs
This is known as Roget's Illusion, or Roget's Palisade Illusion. An absolutely wonderful explanation of it is given here:

http://www.michaelbach.de/ot/mot_Roget/index.html
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Old 08-29-2009, 01:26 PM   #3895
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Hi Vardy! Good link, very interesting stuff.
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Old 08-30-2009, 07:12 AM   #3896
kfsinc
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Thanks for the explanation(s) -- I thought it was mostly photographic illusion, and I knew that JoMamma would have the answer!



kfs
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Old 09-03-2009, 01:07 PM   #3897
HowlingMad
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Lots of Russian stuff here.



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Old 09-05-2009, 04:44 PM   #3898
Hedge36
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Well, damn. My flight school shuttered in my absence.

Anybody know of a good H269 operator in the Dallas area? Otherwise I'm going back to the Robbie...
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Old 09-05-2009, 06:38 PM   #3899
Hedge36
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On a completely different train of thought... anybody got any time in the FH1100?
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Old 09-10-2009, 05:36 AM   #3900
PackRat
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Quote:
Originally Posted by Hedge36
On a completely different train of thought... anybody got any time in the FH1100?
No, Scott.

But I have a BO-105 main rotor blade that would look really neat in your living room. (Slight ding from wirecutter at station 1940). Or just hanging in your garage. Or built in to the leading edge of a bar....hmmm....an inmate bar ......where's Trip?

Get some! Rat sends
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