Runaway 2009 Lexus ES fiery crash kills family of 4
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From: Jeff Strickland on 17 Sep 2009 20:58 "dsi1" <dsi1(a)humuhumunukunukuapuapa.org> wrote in message news:cOAsm.163965$8B7.82937(a)newsfe20.iad... > Jeff Strickland wrote: >> "dsi1" <dsi1(a)humuhumunukunukuapuapa.org> wrote in message >> news:JiAsm.10752$944.6225(a)newsfe09.iad... >>> dbu` wrote: >>>> Shift to N and bail out after stopping. Let the damn thing self >>>> destruct. >>> Shifting to N won't slow you down much - better to go to through the >>> lower gears. Slam it into park when you think you're slow enough... >> >> >> Slam it into Park? That's not going to do anything, and downshifting a >> car running at full throttle is not going to slow down anytime soon. >> > > I betcha a dollar that downshifting at full throttle will indeed slow a > car down. Try in on your car. I'd rather try it on your car, my car has a clutch that will alter the effects. I'm pretty sure my car will stop under full throttle, and if it remains in 5th while attempting to stop, the engine will stall eventually where an automatic will simply downshift and try to overpower the brakes. It won't slow as much as selecting N and mashing the brake pedal.
From: dsi1 on 17 Sep 2009 21:10 Jeff Strickland wrote: > > I'd rather try it on your car, my car has a clutch that will alter the > effects. I'm pretty sure my car will stop under full throttle, and if it > remains in 5th while attempting to stop, the engine will stall eventually > where an automatic will simply downshift and try to overpower the brakes. > > It won't slow as much as selecting N and mashing the brake pedal. > I'm confused - you wouldn't leave a manual transmission in 5th gear if you wanted to stop. I'm assuming that the brakes don't work so the only way to slow down a car would be to downshift. You could use the parking brake - assuming the new fangled Lexus has one of those. My guess is that downshifting would work better at high speeds. Anyway, you'd probably find yourself going sideways if you applied the handbrake at over a 100 MPH.
From: Jeff Strickland on 17 Sep 2009 21:26 "dsi1" <dsi1(a)humuhumunukunukuapuapa.org> wrote in message news:U5Bsm.163974$8B7.88029(a)newsfe20.iad... > Jeff Strickland wrote: > >> >> I'd rather try it on your car, my car has a clutch that will alter the >> effects. I'm pretty sure my car will stop under full throttle, and if it >> remains in 5th while attempting to stop, the engine will stall eventually >> where an automatic will simply downshift and try to overpower the brakes. >> >> It won't slow as much as selecting N and mashing the brake pedal. >> > > I'm confused - you wouldn't leave a manual transmission in 5th gear if you > wanted to stop. I'm assuming that the brakes don't work so the only way to > slow down a car would be to downshift. You could use the parking brake - > assuming the new fangled Lexus has one of those. My guess is that > downshifting would work better at high speeds. Anyway, you'd probably find > yourself going sideways if you applied the handbrake at over a 100 MPH. You are confused. I'll go along with that. The conditions are, the throttle is stuck on full, and the car is doing 100+ mph. What are you gonna do? I'm gonna stand on the brakes until it's stopped, and select N somewhere along the line. I would give serious consideration to turning the engine off. I'm not going to consider downshifting because if the engine is going at full throttle, the car is not going to stop because of the power multiplication that happens when the gear ratio is lowered. Indeed, the brakes have a far better chance of overpowering the engine if the transmission is in a higher gear rather than a lower one. I owned a Jeep that I could not stall if the transmission was in 1st and the transfer case was in LO range. The torque was far greater than the ability of the brakes. I could stall the engine with the brakes in 4th and HI range, but in LO range, I could get out and walk faster than the Jeep would go by itself, but I could not stop it with the brakes without depressing the clutch pedal. A car that is barrelling down the highway at 100+ mph has very little torque, and the brakes can easily overpower the engine. The problem will become -- as some point -- that the lowered speed will force a downshift that can exceed the braking system. At this point, you should be able to kill the engine and stop the car. You could probably run into something to stop the car and live to tell the story.
From: dsi1 on 17 Sep 2009 21:38 Jeff Strickland wrote: > > You are confused. I'll go along with that. I was assuming that the brakes didn't work. If they do work, there's no problem as far as I can see. > > The conditions are, the throttle is stuck on full, and the car is doing 100+ > mph. What are you gonna do? > > I'm gonna stand on the brakes until it's stopped, and select N somewhere > along the line. I would give serious consideration to turning the engine > off. > > I'm not going to consider downshifting because if the engine is going at > full throttle, the car is not going to stop because of the power > multiplication that happens when the gear ratio is lowered. Indeed, the > brakes have a far better chance of overpowering the engine if the > transmission is in a higher gear rather than a lower one. > > I owned a Jeep that I could not stall if the transmission was in 1st and the > transfer case was in LO range. The torque was far greater than the ability > of the brakes. I could stall the engine with the brakes in 4th and HI range, > but in LO range, I could get out and walk faster than the Jeep would go by > itself, but I could not stop it with the brakes without depressing the > clutch pedal. > > A car that is barrelling down the highway at 100+ mph has very little > torque, and the brakes can easily overpower the engine. The problem will > become -- as some point -- that the lowered speed will force a downshift > that can exceed the braking system. At this point, you should be able to > kill the engine and stop the car. You could probably run into something to > stop the car and live to tell the story. > > > > > > > > > > >
From: ben91932 on 18 Sep 2009 10:27
> There is a thing called an "Ignition switch." Turn off the ignition > switch and the engine stops. This will slow down the car. > I'm no 100% sure, but with the Lexus style of push button ignition, doesnt the steering lock after the engine shuts down??? |