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Taylortony
02-03-2005, 12:12 PM
Facinating site and this is from it http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

http://www.enginehistory.org/

One Second in the Life of a Racer


by Tom Fey

The Unlimiteds go flashing through the racecourse, engines howling, air shearing, heat waves streaming. Four hundred eighty miles an hour is 8 miles a minute, and the elite racers take about 70 seconds to cover the 9.1 mile Reno course. If you could take a souped P-51 racer flying the circuit at Reno, slow time down, and examine just one second, what would you find?

In that one second, the V-12 Rolls-Royce Merlin engine would have gone through 60 revolutions, with each of the 48 valves slamming open and closed 30 times. The twenty four spark plugs have fired 720 times. Each piston has traveled a total of 60 feet in linear distance at an average speed of 41 miles per hour, with the direction of movement reversing 180o after every 6 inches. Three hundred and sixty power pulses have been transmitted to the crankshaft, making 360 sonic booms as the exhaust gas is expelled from the cylinder with a velocity exceeding the speed of sound. The water pump impeller has spun 90 revolutions, sending 4 gallons of coolant surging through the engine and radiators. The oil pumps have forced 47 fluid ounces, roughly one-third gallon, of oil through the engine, oil cooler, and oil tank, scavenging heat and lubricating the flailing machinery. The supercharger rotor has completed 348 revolutions, it's rim spinning at Mach 1, forcing 4.2 pounds or 55 ft3 of ambient air into the combustion chambers under 3 atmospheres of boost pressure. Around 9 fluid ounces of high octane aviation fuel, 7843 BTU's worth of energy, has been injected into the carburetor along with 5.3 fluid ounces of methanol/water anti-detonant injection fluid. Perhaps 1/8 fluid ounce of engine oil has been either combusted or blown overboard via the crankcase breather tube. Over 1.65 million foot pounds of work have been done, the equivalent of lifting a station wagon to the top of the Statue of Liberty.

In that one second, the hard-running Merlin has turned the propeller through 25 complete revolutions, with each of the blade tips having arced through a distance of 884 feet at a rotational velocity of 0.8 Mach. Fifteen fluid ounces of spray bar water has been atomized and spread across the face of the radiator to accelerate the transfer of waste heat from the cooling system to the atmosphere.

In that one second, the aircraft itself has traveled 704 feet, close to 1/8 mile, or roughly 1.5% of a single lap. The pilot's heart has taken 1.5 beats, pumping 5.4 fluid ounces of blood through his body at a peak pressure of 4.7 inches of mercury over ambient pressure. Our pilot happened to inspire during our measured second, inhaling approximately 30 cubic inches (0.5 liter) of oxygen from the on-board system, and 2.4 million, yes million, new red blood cells have been formed in the pilot's bone marrow.

In just one second, an amazing sequence of events have taken place beneath those polished cowlings and visored helmets. It's the world's fastest motorsport. Don't blink!

Taylortony
02-03-2005, 12:12 PM
Facinating site and this is from it http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

http://www.enginehistory.org/

One Second in the Life of a Racer


by Tom Fey

The Unlimiteds go flashing through the racecourse, engines howling, air shearing, heat waves streaming. Four hundred eighty miles an hour is 8 miles a minute, and the elite racers take about 70 seconds to cover the 9.1 mile Reno course. If you could take a souped P-51 racer flying the circuit at Reno, slow time down, and examine just one second, what would you find?

In that one second, the V-12 Rolls-Royce Merlin engine would have gone through 60 revolutions, with each of the 48 valves slamming open and closed 30 times. The twenty four spark plugs have fired 720 times. Each piston has traveled a total of 60 feet in linear distance at an average speed of 41 miles per hour, with the direction of movement reversing 180o after every 6 inches. Three hundred and sixty power pulses have been transmitted to the crankshaft, making 360 sonic booms as the exhaust gas is expelled from the cylinder with a velocity exceeding the speed of sound. The water pump impeller has spun 90 revolutions, sending 4 gallons of coolant surging through the engine and radiators. The oil pumps have forced 47 fluid ounces, roughly one-third gallon, of oil through the engine, oil cooler, and oil tank, scavenging heat and lubricating the flailing machinery. The supercharger rotor has completed 348 revolutions, it's rim spinning at Mach 1, forcing 4.2 pounds or 55 ft3 of ambient air into the combustion chambers under 3 atmospheres of boost pressure. Around 9 fluid ounces of high octane aviation fuel, 7843 BTU's worth of energy, has been injected into the carburetor along with 5.3 fluid ounces of methanol/water anti-detonant injection fluid. Perhaps 1/8 fluid ounce of engine oil has been either combusted or blown overboard via the crankcase breather tube. Over 1.65 million foot pounds of work have been done, the equivalent of lifting a station wagon to the top of the Statue of Liberty.

In that one second, the hard-running Merlin has turned the propeller through 25 complete revolutions, with each of the blade tips having arced through a distance of 884 feet at a rotational velocity of 0.8 Mach. Fifteen fluid ounces of spray bar water has been atomized and spread across the face of the radiator to accelerate the transfer of waste heat from the cooling system to the atmosphere.

In that one second, the aircraft itself has traveled 704 feet, close to 1/8 mile, or roughly 1.5% of a single lap. The pilot's heart has taken 1.5 beats, pumping 5.4 fluid ounces of blood through his body at a peak pressure of 4.7 inches of mercury over ambient pressure. Our pilot happened to inspire during our measured second, inhaling approximately 30 cubic inches (0.5 liter) of oxygen from the on-board system, and 2.4 million, yes million, new red blood cells have been formed in the pilot's bone marrow.

In just one second, an amazing sequence of events have taken place beneath those polished cowlings and visored helmets. It's the world's fastest motorsport. Don't blink!

MEGILE
02-03-2005, 12:16 PM
http://forums.ubi.com/images/smilies/25.gif

TgD Thunderbolt56
02-03-2005, 12:19 PM
cool and interesting...Thx TT

LeadSpitter_
02-03-2005, 12:31 PM
Greatstuff, but they forgot how many beads of sweat and 4 blinks during one lap at reno http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

adlabs6
02-03-2005, 01:08 PM
Nice read, thanks. http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

p1ngu666
02-03-2005, 01:25 PM
http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif http://forums.ubi.com/images/smilies/25.gif

tHeBaLrOgRoCkS
02-03-2005, 02:30 PM
http://forums.ubi.com/images/smilies/784.gif http://forums.ubi.com/images/smilies/25.gif

GT182
02-03-2005, 03:04 PM
Holy ol'underwear, what was that? http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif

I dunno, but it sure was fast. http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif

Great read Tony. http://forums.ubi.com/images/smilies/25.gif

Amazing what "modern" technology will do, and what it does to do it. "Git R Done!"

Red_Russian13
02-03-2005, 03:08 PM
Very, very interesting read. Thanks.

Freycinet
02-04-2005, 04:22 AM
great find, thx, I posted it at SimHQ too.

Badsight.
02-04-2005, 04:36 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Taylortony:
In that one second, the V-12 Rolls-Royce Merlin engine would have gone through 60 revolutions, with each of the 48 valves slamming open and closed 30 times. The twenty four spark plugs have fired 720 times. Each piston has traveled a total of 60 feet in linear distance at an average speed of 41 miles per hour, with the direction of movement reversing 180o after every 6 inches. Three hundred and sixty power pulses have been transmitted to the crankshaft, making 360 sonic booms as the exhaust gas is expelled from the cylinder with a velocity exceeding the speed of sound. The water pump impeller has spun 90 revolutions, sending 4 gallons of coolant surging through the engine and radiators. The oil pumps have forced 47 fluid ounces, roughly one-third gallon, of oil through the engine, oil cooler, and oil tank, scavenging heat and lubricating the flailing machinery. The supercharger rotor has completed 348 revolutions, it's rim spinning at Mach 1, forcing 4.2 pounds or 55 ft3 of ambient air into the combustion chambers under 3 atmospheres of boost pressure. Around 9 fluid ounces of high octane aviation fuel, 7843 BTU's worth of energy, has been injected into the carburetor along with 5.3 fluid ounces of methanol/water anti-detonant injection fluid. Perhaps 1/8 fluid ounce of engine oil has been either combusted or blown overboard via the crankcase breather tube. Over 1.65 million foot pounds of work have been done, the equivalent of lifting a station wagon to the top of the Statue of Liberty.

In that one second, the hard-running Merlin has turned the propeller through 25 complete revolutions, with each of the blade tips having arced through a distance of 884 feet at a rotational velocity of 0.8 Mach. Fifteen fluid ounces of spray bar water has been atomized and spread across the face of the radiator to accelerate the transfer of waste heat from the cooling system to the atmosphere. <HR></BLOCKQUOTE>
PFFFFT

Formula One motors broke 18,000 RPM's back in 1998 http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

AWL_Spinner
02-04-2005, 04:45 AM
Anyone else been to the Air Races?

Fantastic weekend!

ElAurens
02-04-2005, 05:34 AM
Not bad for an engine whose basic design predates WW2. With a little help from Allison V1710 connecting rods. And some good old fashioned Yankee hot rodding too...


And I also agree with Badsight. The modern Formula 1 race engine is an amazing thing, they commonly exceed 20,000rpm for qualifying these days. The Ferrari engine blocks are retired after 1000km of use due to concern about micro fractures caused by sonic fatigue. Simply amazing.

WB_Outlaw
02-04-2005, 05:43 AM
There ain't nothin' like 2200 horsepower at 3000 RPM (or thereabouts), and that's circa de 1944.

-Outlaw.

CWH1089
02-04-2005, 09:19 AM
my head hurts... http://forums.ubi.com/images/smilies/53.gif http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif