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Join Date: Nov 2004
Location: Cincinnati, OH
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Video inside a cylinder..
Some guy at work found this on You Tube and posted it on the work BBS.
Video captured inside a cylinder of a running engine. I thought it was pretty cool, so here you go... http://video.google.com/videoplay?docid=-5815350492893860613&hl=en
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Richard W. Red '70 E, 2.2 White (w/ Red & Blue), '82SC, "Frankenstein" -a bit tweeked |
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10-09-2007, 03:27 PM
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not at all what I expected. I thought the power stroke would be far more explosive.
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I say we take off, and nuke the site from orbit. It's the only way to be sure. 2009 Cayman |
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10-09-2007, 03:31 PM
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,387
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We all know how it works but to actually see it, well that's just cool!
Thanks for posting it.
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MikeČ 1985 M491 |
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10-09-2007, 03:33 PM
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Amazing!!
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Recording Engineer, Administrator and Entrepeneur Designer of Fine Studios, Tube Amplifier Guru 1989 Porsche 911 Carrera Coupe 25th Anniversary Special Edition Middle Georgia |
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10-09-2007, 03:34 PM
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19 years and 17k posts...
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Incredible, thanks for posting that, Randy!
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Art Zasadny 1974 Porsche 911 Targa "Helga" (Sold, back home in Germany) Learning the bass guitar Driving Ford company cars now... www.ford.com |
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10-09-2007, 03:38 PM
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Location: Windsor, CT
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That is very cool. Interesting how you can see local hot spots on the valve. I would have expected a blinding flash. Instead, nice clean combustion. More like a good hot fire.
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Mike '82 911SC, SSI, 22/29 tbars, 22F/22R Adj swaybars, Bilstein Sport, Elephant polybronze & monoballs, Cambermeister bar, turbo tierods, Carrera oil cooler, front brake cooling ducts, Sparco Sprint 5 & Recaro SRD PAX seat, Teamtech harness, DAS Sport rollbar. |
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10-09-2007, 03:38 PM
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THE IRONMAN
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Hyper cool...thanks for sharing...amazing to see the air&fuel mixture go in by the intake valve...and the spark of the plug...coooooooooooool...
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1984 911 CARRERA RUBY RED TARGA SW CHIPPED-BURSCH CATBYPASS MONTY FREE FLOW EXHAUST <IN GAS WE TRUST> |
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10-09-2007, 04:22 PM
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is it my imagination or is the intake valve rotating even when seated? that can't be normal.
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I am become Bob, Destroyer of Boats. 1986 911 (The Little Red Rocket)... ...and a bunch of other cars/boats/planes that are sold, sunk or crashed. |
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10-09-2007, 04:41 PM
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Location: Northern CA
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uber cool - I also thought there would be more smoke/etc. on the flame front and down stroke.. must be an lng car
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10-09-2007, 05:21 PM
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Really cool video! Thanks for the link.
Cooper
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Cooper's Classy Car Care Providing Clear Bra installation, Paint touch-up, Detailing PCA/OCR since 1997 '81 911SC, '95 993 Tip. Project 'Euro spec' '70 914-4 w/2.0 & side shifter |
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10-09-2007, 06:01 PM
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911 User
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combustion !
after all these years of picturing that in my mind,its amazing to see.
amazing,thanks !
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'84 Carrera 3.4-280hp '75 914 2.0 85hp '60 BMW R69-34hp '49 VW Bug-25hp |
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10-09-2007, 06:05 PM
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It sure looks like the valve is spinning. I wonder if it's just an optical illusion. There are comments saying this is an old Yamaha 3.0 SHO motor. If you look very close you can see it's a 4 valve head.
Also don't forget that is in an extreme slow motion. It does not indicate what the RPM is, but even at a lowly 3000, each complete stroke of the piston is only .010 long, so a complete firing cycle would be .020. So with the video as slow as it appears, the "explosion" is not going to look like one. All that said, it's an uber cool video.
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John Snodgrass 1973 Porsche 911 "Barney" (race car for sale) 2008 Nissan Maxima - Daily Driver 1999 F350 Diesel Crew Cab - Tow Beast 1990 Airstream 36' Land Yacht - Home Away From Home |
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10-09-2007, 07:47 PM
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Location: Portland, Oregon
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Very cool.
It got me thinking that doesn't GM have a sapphire engine (clear cylinder) to watch this type of stuff.
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Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
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10-09-2007, 10:41 PM
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Location: Burlingame, CA
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Looks like both valves are spinning if you look closely. Very cool video! Thank you!
 Jon |
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10-09-2007, 11:35 PM
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Location: Sweden
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Hello.
I thinkt there is a reason to believe that they took one strobe-picture for each stroke and delayed the exposure one crank degree for each cycle as it's much easier on data-collecting electtronics in camera. Thus, frames are a multiplex of different power-strokes and valve seems to rotate to extreme degree. Here is another example, filmed trough a hollow piston: Notice flame-propagation delay and imagine how long it takes in a typical 100mm bore 911-head with offset spark plug. Then you understand why 911 engines need more ignition advance than DOHC engine with spark-plug in the middle and why twin-plugged engines need less advance... http://www.tfd.chalmers.se/gr-kurs/mtf240/SI_1200rpm_1.6imep_ign30btdc_lam1_hom_mod.avi
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Thank you for your time, Last edited by beepbeep; 10-10-2007 at 12:04 AM.. |
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10-10-2007, 12:00 AM
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Location: Kentucky
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That's amazing to see. Thanks for posting!
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10-10-2007, 12:51 PM
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Great post , really enjoyed seeing that shot.
A little OT but heres my best effort at a thank you link: http://www.wired.com/cars/coolwheels/magazine/15-10/pl_motor# 
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'89 3.2/3.6 coupe |
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10-11-2007, 07:44 AM
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Glad you all thought that was as cool as I did.
I'd like to see a clip of the engine mentioned above with see through "crystal" cylinder(s) if anyone has one... That was an interesting article on the $4,000 /hr wind tunnel, video didn't work for me (if there was video there) though. I always wondered how/what machinery they use to simulate the wind tunnel effects on high end race cars. Thanks !
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Richard W. Red '70 E, 2.2 White (w/ Red & Blue), '82SC, "Frankenstein" -a bit tweeked |
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10-11-2007, 04:35 PM
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Note the “condensation cloud” that forms on the intake stroke. This is where the already vaporized fuel in the air mixture condenses into droplets again (just like a cloud) when the pressure drops. It has to re-vaporize again from the heat in the cylinder and the heat from compression. There are four phase changes of the fuel from liquid in the fuel system to vapor in the intake, back to liquid in this ‘cloud’ and finally to vapor during compression so it will burn.
There are commercial components that combine a sparkplug and fiber optics to a video camera to take these video images. We are lucky with a 911 since we can use the second sparkplug port for the video. Best, Grady
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10-11-2007, 05:11 PM
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