Fly through a stop light camera on red with the hood open and one injector at a time disconnected and propped up in plain sight?

Several modern digital cameras have a movie mode. Almost all do. Some of the "prosumer" ones -- the mid-range $300-500 models that aren't full SLR but do have some advanced features, are capable of several hundred frames per second in video mode. You could then split out just the ones you wanted to keep. I'd be looking in that general vicinity for something that specifically advertised high speed capability.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

What about a good old film SLR (very cheap these days) in a completely dark box with the shutter held open? Blast the injector and strobe at the same time. B&W film would have to be used to get the granularity and speed you'd need. You'd have to get that online and hunt down a lab that would develop it for you (or do it yourself).

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1984 300TD

I've got lots of that sort of equipment; I love the old Minolta manual focus stuff. I never thought brand loyalty meant all that much, but I have to say, I've tried them all, and those just fit my hands the best. Nikon, Canon, Pentax, Mamiya, everybody back then made excellent stuff.

I'm curious how you're proposing to synchronize the firing of both, though. The injector spray and the flash strobe are both only tiny fractions of a second long, and I can't think of a good electronic way to synch them. I guess you could just take repeated shots and hope you got lucky.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

internet it.. i looked into a DIY setup like that that involved a sound trigger

I'm looking for a piezo pressure transducer to electronically log the pop pressure.

I think the cheapest way to get images is in the dark, on black background, get a good manual focus lens, manually triggered external flash (or two from different angles), prop open the exposure. Give the pop tester handle a crank to fire off several pops and manually fire flash at some point hoping to catch one. Rinse and repeat, try to mix up your trigger points. Use a steady stroke on the handle, and by ear you'll get a rhythm for the pop frequency. Trigger +/- relative to an anticipated pop. Play with different ISO settings for detail or speed your choice. Digital or film your choice. You'll get several different action points of a injection event. Enough to piece together a story.

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Cheers!
Scott McPhee

1987 300D

Roy,

I have a digital SLR that also does hi-def video. HD (16:9)1920 x 1080P -20fps, 1280×720P -30fps.

Casio also make a hi-speed handheld. I don't know the model number.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

When are you back so we can test it?

Don't think a 30fps video camera will work. Probably need something around 240fps (?) but, not completely sure.

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too many w123's
84 280 SL 5 speed

Someone mentioned Casio already, but more specifically, look at the Casio High-Speed Exilim cameras (models starting with EX-F)

e.g. http://www.exilim.com/intl/ex_fc100/features.html

They are relatively inexpensive consumer-grade cameras that supposedly shoot at up to 1000 frames/second.

I've never used one of these, but I've read about them.

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1989 250TD Wagon 5-speed, 160,000mi ::: Dark gray metallic / black cloth
1984 190D-2.2 5-speed, 287,000mi ::: Silver-blue metallic / black MB-tex ::: SOLD

That looks nice...

The slo-mo's from the olympics have enough sample rate and shutter speed to show the 240Hz flicker of the lighting, probably HID's.

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

Wouldn't that be 120Hz? The AC waveform (and therefore the arc in the lamp) hits zero twice in a 60Hz AC power system. Arc lamps don't care which way the power is flowing unlike LED's. Now with electronic ballasts the frequency may be much higher.

Then you have to also think about 3 phase with each leg being 120 degrees out of phase with its neighbor. A fun thing to do is to take a desk fan and look at sodium street lights through the blades at different speeds. If you're lucky there will be a speed at which you'll be able to see the flicker.

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Dale

http://i52.photobucket.com/albums/g1...MG_2277sig.jpg

1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz

Pre-glow - A moment of silence in honor of Rudolph Diesel