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Thread: Qualy based on speed
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18th May 2013, 19:28 #1
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Qualy based on speed
Only started watching racing and indycar last year...why on ovals, is qualification based on average speed? Why not just base it on fastest time in 4 laps? Also, how do they clock the average speed? Average of every second? Speed when crossing the line?p
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18th May 2013, 20:07 #2
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They show average speed because the general public can't relate to a lap time like 39.25 seconds.
A 39.25 second lap on a 1.5 mile oval would be a much slower average speed than a 39.25 on the 2.5 mile Indy oval.
Average speed is calculated from the lap time. The drivers look at lap time, not average speed.
The goal is to make a lap in the shortest possible time.
At Indy, a 40.000 second lap time = 225 mph average speed
It's a 2.5 mile lap, or 13200 feet.
13200 feet / lap time x 60 sec x 60min / 5280 feet per mile = average speed in miles per hour.
13200 feet / 40 seconds x 60 seconds x 60 minutes / 5280 feet per mile = 225 miles per hour
Will Power did 4 laps in 2:37.3127 (157.3127 seconds - an average of 39.328 per lap). His fastest lap was done in 39.2290 seconds
His 4 lap average speed was 288.8425 mph. His fastest lap (lap #1) was an average speed of 229.4221 mphThe secret to winning races: More Throttle, Less Brake.
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18th May 2013, 21:06 #3
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Oops!
His 4 lap average speed was 228.8425 mph, not 288.8425. LOL!The secret to winning races: More Throttle, Less Brake.
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18th May 2013, 21:14 #4
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So I thought they could go back out and try again. So now they are done trying to get into the top 9?
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18th May 2013, 21:41 #5
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4-lap qualifying until 6:00 PM EST.
Wind is not much of a factor today, but some will wait for the air temp to drop some so the engines can make a tad more power.
Top 9 pole shootout starts at 6:30 PM EST.The secret to winning races: More Throttle, Less Brake.
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18th May 2013, 22:20 #6
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Originally Posted by Nem14
You missed my main question though, how do they calculate the average speed? Are they taking into account that at one point he was moving 1 mph?
I think it's a bit silly to think the general public doesn't understand a timed lap, all courses are different lengths.
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18th May 2013, 22:34 #7
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Originally Posted by bsnalex"Old roats am jake mit goats."
-- Smokey Stover
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19th May 2013, 04:33 #8
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Originally Posted by bsnalex
I showed you exactly how to calculate the average speed of a timed lap, even if the car starts from 0 mph, on an oval OR A ROAD COURSE. Even if the car stops at any time during the lap, and then starts moving again.
An AVERAGE speed takes into account ANY speed the car travels during a timed lap.
As Starter points out - they get a partial pit out lap, and an entire warm up lap, BEFORE they start timing the 4 laps that count towards qualifying.
None of the cars today went slower than 210 mph on any 4 of their qualifying laps, so I'm not sure where you come up with 1 mph?The secret to winning races: More Throttle, Less Brake.
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19th May 2013, 14:23 #9
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Originally Posted by bsnalex
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19th May 2013, 14:38 #10
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Originally Posted by C3POPopular memory is not history.... -- Gordon Wood
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