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11-12-2015, 09:55 PM
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Join Date: Jan 2005
Location: Twin Cities, MN
Posts: 1,566
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Rolling shutter explained
Came across this image on reddit, thought some here might find it interesting. It's a visual explanation of the rolling shutter effect on the prop on all the RV videos that get posted around here.
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Brad Benson, Maplewood MN.
RV-6A N164BL, Flying since Nov 2012!
If you're not making mistakes, you're probably not making anything
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11-13-2015, 03:23 AM
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Join Date: May 2010
Location: Ft Laudedale FL
Posts: 180
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True, but fixable
https://www.youtube.com/watch?v=UljfdzjZ2VY
via Gopro with 2 sunglass filters carefully taped on, Gopro mounted to bill of my baseball hat with double tape and alum strip with 2 bends to fit curve of bill (camera removed from orig case). Purchase of optional remote mic highly recommended. Only about $25. Can be put in earcup of headset.
https://www.youtube.com/watch?v=Hv1qEXk7slU
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Dale
ATP, dreamer and maintainer; but not a builder
RV6a N18XP 960TT (builder: Jerry Cochran)
RV6a flight experience 2100 hrs
Superior IO-360 2007
Hartzell Blended Airfoil Prop
Dual LS EI, Dual Battery
GRT HX efis & RAIM GPS, 2 axis GRT autopilot
G696, GDL39 WX, Traffic
Dynon D10
Gear Leg Stiffeners from Woodmanrog
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11-13-2015, 06:05 AM
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Join Date: Jan 2005
Location: Twin Cities, MN
Posts: 1,566
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Quote:
Originally Posted by RV6airplanePilot
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Oh for sure - addressing it is trivial. I just thought this was a nice visual explanation.
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Brad Benson, Maplewood MN.
RV-6A N164BL, Flying since Nov 2012!
If you're not making mistakes, you're probably not making anything
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11-13-2015, 06:37 AM
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Join Date: Jan 2005
Location: Winter Haven, FL
Posts: 263
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comprendo?!
great visual depiction.
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Kevin Crews
Bartow, FL
RV-6 'Woo hoo!'
2019 =VAF= donor
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11-13-2015, 07:24 AM
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Join Date: May 2010
Location: Ft Laudedale FL
Posts: 180
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Yes, very good
Quote:
Originally Posted by ChiefPilot
Oh for sure - addressing it is trivial. I just thought this was a nice visual explanation.
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Yes, it is a good explanation. I also think many don't know how to fix; as you said most videos posted have the "distraction".
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Dale
ATP, dreamer and maintainer; but not a builder
RV6a N18XP 960TT (builder: Jerry Cochran)
RV6a flight experience 2100 hrs
Superior IO-360 2007
Hartzell Blended Airfoil Prop
Dual LS EI, Dual Battery
GRT HX efis & RAIM GPS, 2 axis GRT autopilot
G696, GDL39 WX, Traffic
Dynon D10
Gear Leg Stiffeners from Woodmanrog
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11-13-2015, 08:11 AM
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Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
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Excellent! Always wondered why that weird prop effect always showed. Thanks for posting. 
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Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
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11-13-2015, 10:49 AM
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Join Date: May 2007
Location: Rio Rancho, NM
Posts: 136
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sunglass filter?
Love the graphic explanation of the rolling shutter. Your filter seems to have been a great fix! What material works best to filter out the prop and where is a good source?
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Craig Brenden
RV6 built, flown, and sold
A&P, EAA Tech Counselor
EAA Flight Advisor, CFII
Air Traffic Controller
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11-13-2015, 11:44 AM
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Join Date: Jun 2012
Location: Frederick, MD
Posts: 823
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Here is a practical demonstration of what rolling shutter is about and the cure.
https://youtu.be/4lHlzRw_Oek
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Dan Morris
Frederick, MD
PA28-140
Hph 304CZ
RV6 built and sold
N199EC RV6A flying
Learn the facts. "Democracy dies in darkness"
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11-13-2015, 12:58 PM
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Join Date: Jul 2013
Location: US
Posts: 2,254
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Back in the old days of film, focal plane shutters would cause "curved props" unless the lens was stopped down and the shutter speed slowed.
Leaf or diaphragm shutters would not do this, IIRC.
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11-13-2015, 02:25 PM
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Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,063
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https://www.youtube.com/watch?v=QmQR...ature=youtu.be
Shows the effect of a neutral density filter on a GoPro.
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"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q
Donated in 2020 
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