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Old 10-29-2012, 09:14 PM
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The auto fuel cut off and chute deploy on fuel cars is to get the car shut off and slowing down if the driver is knocked out by a blower explosion. There is a few bug in it still. All it take is a break in a connection for a few micro seconds and the chutes come out. This has happened several time this year on the starting line. It would have happened more often but some drivers have a way to disable the system while staging the car if the starter turns his head.
Yes cars will still hit the wall if they get out of shape with a Nascar style system in use but they would stay on the ground and right side up.

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Old 10-29-2012, 09:31 PM
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The very first time we pulled a chute was at Cayuga Canada.It was on a 1969 Super Gas Camaro. My partner said at first he thought damm we didn't pack it right and that was during the pilot chute was being deployed.Then the main chute hit and he said it was like the back of the car lifted off the ground.It hit hard!!!. He said there was a cross wind that he had to fight hard from pulling the car into the other lane.

Yeah the chutes do stop.BUT the other weather conditions do come into play and some of it can make things worst.

We have for yrs implied anyone can jump into any car and drive it.No matter how fast it is.Time and again I have seen guys build a car that is over their heads.Do we require licensing??.Yep.But that doesn't replace seat time and a slow progression in a number of slower class racing cars.Ego's get in the way of common sense.For some those faster classes are not for them.Well the definition I guess I'm talking about is it does take nature talent.I hate it when we are going up against a newbie.It is just damm scarey.Our driver we brought along in 5 yrs in Jr Dragsters where each yr he as track champion at two tracks.Four more yrs in 10.90 and 9.90 car.Since he was born he has been around Drag Racing his whole life and he knows the mechanics of every car he drives.Very competent.
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Old 10-29-2012, 09:32 PM
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Quote:
Originally Posted by tresi View Post
The auto fuel cut off and chute deploy on fuel cars is to get the car shut off and slowing down if the driver is knocked out by a blower explosion. There is a few bug in it still. All it take is a break in a connection for a few micro seconds and the chutes come out. This has happened several time this year on the starting line. It would have happened more often but some drivers have a way to disable the system while staging the car if the starter turns his head.
Yes cars will still hit the wall if they get out of shape with a Nascar style system in use but they would stay on the ground and right side up.
The thing is, IMO there's too little time and distance before an out of shape Pro Stocker hits the wall and/or goes upside down for the roof flaps to deploy and correct the vehicle's yaw, pitch, or roll, etc.

When watching a stock car, many seconds can elapse before an out of shape car gets backwards enough for the roof flaps to deploy.
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Old 10-29-2012, 09:41 PM
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On a circle track car the flaps are positioned so the car must be about 45 degrees to the reletive wind for the flaps to deploy and the deploy quickly once that angle is met. This can be reduced a great deal in a drag car. It might not work but that could be tested in a wind tunnel without having to crash a car.
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Old 10-29-2012, 09:56 PM
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It might, in cases where there's a long enough skid w/o hitting anything. But even stock cars go upside down fairly often when they hit the wall or another car- flaps and all.

Agreed testing might be worthwhile. It wouldn't surprise me if they have already...
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Old 10-29-2012, 10:53 PM
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Try oil under the tires.lol We just did that last wkend at the CHRR second rd in t/f with the Crop duster.
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Old 11-03-2012, 11:54 AM
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Drag cars, the professional ones at least, tend to crash differently after, say, 1986ish.

Before they would slide around, but after say 86ish the tend to roll over.

Discuss.
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Old 11-05-2012, 09:32 PM
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i am thinking that the main reason to run a spool in a drag car is to help prevent wheelspin? Specifically, one wheel spinning and loosing traction while the other one maintains traction?

However, if you run a spool and one tire looses traction/gets out of the grove etc., thus the car tend to go towards the opposite side of whatever tire maintains traction. I.e., left tire breaks, right tire maintains traction, car goes left. Then how is this different from running an open rear?

Should the faster cars go back to running open differentials? For a while Garlits ran an open diff on those first rear engined dragsters.
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