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Upatdawn
1,073 posts
17 months
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what is the difference (in feet/yards) at the top end between (say) a 6.50 car and a 7.50 car that start together on a non-handicapped tree/green?
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TheMighty
541 posts
80 months
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That would depend on the acceleration profile of the given cars, as the distance between the two will be determined by the speed of the second car over the period between the point the first car crosses the line and it itself crossing the finish line (a second later), hence why close finishes are often given as distances but virtually always stated as approximate due to the fact that they are calculated using the average speed over the last 66ft of track ie: the given terminal speed. In every case where the cars are still under power through the finish line the true distance is closer than that given. The error due to change in speed over time (acceleration) becomes greater as the elapsed time difference increases between the cars and as such it would be a pretty much worthless calculation when there is a second between the cars if you were to just use the terminal speed.
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Turbobird1
329 posts
17 months
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a 7.5 super mod car runs 6.2 at 1000 ft approx so a 6 20 car it would be 350 feet approx id guess somewhere between 250 and 300 ft....pure guess with nothing exept 1000 ft ets to base the guess on.... wheres Crikey when you need him 
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crikey
1,497 posts
80 months
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Evenin'  To paraphrase Mighty, there's a shedload of variables I'll have a look when I'm on a pc and come up with a number that'll be there or thereabouts.
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Upatdawn
1,073 posts
17 months
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so....(thinking outside the box)
why not let the entrants in this "new class" (say 6.50 - 7.50 cars) all start on the "pro" tree with no handicap, the finish line being variable (say in 20ft sections) and the winner is the one who is first to "their" finish line, sort of handicapping from the other end?
i.e. a 6.50 car would have a 1320ft lane and a 7.50 car would have (say) a 1000ft lane..(examples only)
sounds daft but so did a round earth at one time, and helicopters (and im still unsure about them...)
best lock the doors now before men in white coats arive
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Barry B
493 posts
80 months
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I'm not an expert but if the lanes were different lengths, wouldn't you need two seperate timing systems one for each lane ?
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Turbobird1
329 posts
17 months
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timing lights every 20ft... 
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crikey
1,497 posts
80 months
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Barry B said: I'm not an expert but if the lanes were different lengths, wouldn't you need two seperate timing systems one for each lane ? Not neccesarily Barry. The TSI system can set the finish line at 1320, 1000 or 660 ft so it would probably only take a software tweak to be able to set a different finish line in each lane. That said, that is without doubt the most monumentally stupid idea ever.
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Upatdawn
1,073 posts
17 months
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crikey
1,497 posts
80 months
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Turbobird1 said: a 7.5 super mod car runs 6.2 at 1000 ft approx so a 6 20 car it would be 350 feet approx id guess somewhere between 250 and 300 ft....pure guess with nothing exept 1000 ft ets to base the guess on.... wheres Crikey when you need him Who needs me to work it out Using a bunch or runs between 6.4 and 6.6, and a bunch between 7.4 and 7.6, average speeds are 181.24 and 212.26 respectively. A 1 second difference at the finish line would result in a MOV of 288.56ft. As above though that's very much ish.
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Turbobird1
329 posts
17 months
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lol just a lucky guess based on some faulty facts for a moment there i thought a 1/4 mile was 1350 ft even though i knew deep down its 1320........
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Upatdawn
1,073 posts
17 months
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crikey said: That said, that is without doubt the most monumentally stupid idea ever. T'is in the bin!
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crikey
1,497 posts
80 months
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Upatdawn said: T'is in the bin! Make sure the lid is on tight. That wasn't so much thinking outside the box as thinking inside the padded cell
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crikey
1,497 posts
80 months
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Turbobird1 said: lol just a lucky guess based on some faulty facts for a moment there i thought a 1/4 mile was 1350 ft even though i knew deep down its 1320........ Lol ! That's ok though, most people think the finish line is where the gantry is.....
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Upatdawn
1,073 posts
17 months
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crikey said: Make sure the lid is on tight. That wasn't so much thinking outside the box as thinking inside the padded cell All great thinkers have been made fun of......as if I worry! ha!
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Upatdawn
1,073 posts
17 months
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Turbobird1 said:
ok so what about a nostalgia comp motorcycle class
wheres all the home built blown triunphs and nortons of yesteryear, the real back garden shed engineering that was the backbone of all british drag racing was no where more evident than in the comp bike fields of the 70s and 80s
id pay good money to see that show.....
would you pay 2012 gate prices tho?...lol
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PhilSweeney
111 posts
58 months
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As good as it sounds I'm not sure there's a "need" for the class. There are some 7 sec cars out there that don't want to run brackets and thats understandable, but equally they probably won't be happy getting their arse kicked by a 6 second car either. What you want is a regular turnout of 7 sec cars, that survives without spoliers. That way the championship winner will be the quickest car, who beat all comers by turning out at every event.
For me, if a class like this went ahead, I'd have it
- 7.0 -8.49 bracket,pro tree
- Dragsters, Altereds, Doorslammers
- Breakouts permitted in qualifying, break-out delta added to ET as Luke said
- Must run quicker than 8.49 in qualifying to make eliminations ladder.
- Breakout in eliminations is an automatic loss.
- A-fuel allowed, no blown nitro, pump restictions apply
- No screw blowers
- MSA tagged
- Limit of 598cu in naturally aspirated
- Limit of 498in in blown
- No staging for points, bye runs must be run under 8.49
- First alternate rule applies
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SpencerTramm
62 posts
77 months
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PhilSweeney said: For me, if a class like this went ahead, I'd have it
- 7.0 -8.49 bracket,pro tree
- Dragsters, Altereds, Doorslammers
- Breakouts permitted in qualifying, break-out delta added to ET as Luke said
- Must run quicker than 8.49 in qualifying to make eliminations ladder.
- Breakout in eliminations is an automatic loss.
- A-fuel allowed, no blown nitro, pump restictions apply
- No screw blowers
- MSA tagged
- Limit of 598cu in naturally aspirated
- Limit of 498in in blown
- No staging for points, bye runs must be run under 8.49
- First alternate rule applies Does your car fit these regulations Phil?
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Turbobird1
329 posts
17 months
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A fuel in a sportsman class????...................i rest my case
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dont know
56 posts
65 months
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Hmm someone just does not understand how dangerous an A fueler is.
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