top fuel flames.

Messages
470
Location
KS
many years ago i was corrected about how the flames come out of a top fuel engine. i need to be reminded how that works, thanks.
 
Messages
43,638
Location
'Stralia
The nitromethane only partially combusts, as it carries it's own oxygen, and you get the most power (and some cooling) by mass flow of the fuel and partial combustion...then when it hits the air, the second stage of combustion happens.
 
Messages
14,631
Location
Santa Barbara, CA
I go to dirt races occasionally and you can tell when someone has spiked their fuel with nitromethane when the flame out the exhaust is much more prominent. Plus the smell is also very obvious. Something interesting about nitro, my mom lost her sense of smell after having a brain tumor. When we went to the NHRA finals in Pomona last year she could smell the nitro and is looking forward to us going to the Winternationals in a couple weeks.
 
Messages
2,043
Location
WY
My favorite smell in the world is methanol only partially combusted. Nitro is also pretty good. My eyes water with joy just thinking about it.
 
Messages
1,038
Location
Athens, GA
I had also read at one time that part of the flames is burning hydrogen. From one of those 'check this out' lists. "-Nitro methane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, disassociated from atmospheric water vapour by the searing exhaust gases." True or not, makes a good story.
 
Messages
3,141
Location
BC, Canada
Like tear gas. You should see the people scatter when they fire those engines up in the pits. I love the smell of nitromethane in the morning. Smells like........
 
Messages
136
Location
FL
Feels like the hair follicles on my scalp rhythmically recoiling from the closely-timed percussion of nitro fueled shotgun blasts.
 
Messages
726
Location
Perth, Western Australia
Originally Posted by Skippy722
Originally Posted by CT8
Here is a video link,
Right on the verge of hydro locking!
It's funny. You spend years *knowing* how much fuel these things use, and yet when I watch that video I'm still astonished. Sometimes quantities can be abstracted away until it's right there in all its firehose glory. A bit like the helitack I watched on the weekend sucking up water at about ~65L/s. Seems obvious enough until you see 65L/s come out the end of a pipe.
 
Messages
1,038
Location
Athens, GA
I scanned an article ages ago and posted it on my personal website. I don't think I've touched that site in 10 years, but the article is still there. From a publication in 1991: (Uploaded to Google Photos since that old website is massively insecure) https://photos.app.goo.gl/ZTwg5FcN6kqCdUgo6 State of the art Top Fuel in 1991.
 
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