Fly By Wire
in [ATVs]
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From: I am Tosk on 3 Feb 2010 15:25 In article <b506b741-1b5b-4967-b538- e473663960ed(a)z41g2000yqz.googlegroups.com>, mikesturdevant127 @hotmail.com says... > > I am Tosk says: > > > Did you hear the recently released 911 call from the father of a family > > of 4 as their car hit the end of the freeway at 120 mph? > > There is no car made today that will not stop via a strong > foot on the brake, no matter what position the throttle is in. > It will take longer than normal but you'll stop. > > > Go fast. Take chances. > Mike S. Go google the 911 call, the guy was doing a buck twenty according to him and the brakes did not work. They all died a few seconds later reading/screaming the signs into the phone, "freeway ends 1/4 mile, etc...". I doubt when the guy said the brakes didn't work, he was making it up. In this case, it was a Lexus. RMR
From: XR650L_Dave on 3 Feb 2010 15:27 On Feb 3, 2:13 pm, IdaSpode <not(a)home_watching.tv> wrote: > On Wed, 3 Feb 2010 09:16:48 -0800 (PST), JayC <j...(a)sysmatrix.net> > wrote: > > >> > Did you hear the recently released 911 call from the father of a family > >> of 4 as their car hit the end of the freeway at 120 mph? It was chilling > >> hearing the pleas' for help and the final screams of his family as they > >> hit the barrier and went over the cliff. I heard it the other day and > >> still shake when I think of it.. > > >The real shame is that the guy, a police officer, was too unfamiliar > >with operating a vehicle to put it into neutral when the throttle > >stuck. That technique is taught in driver's ed in high school. > >Instead, they made a cell phone call. > > Then there is that little known accessory called the ignition switch, > how hard can it be to turn the key to OFF position? > > >JayC > > DJ It's easy when there is one. That car, you had to hold a button down for 3 seconds to kill the engine. Dave
From: XR650L_Dave on 3 Feb 2010 15:31 On Feb 3, 2:04 pm, sturd <mikesturdevant...(a)hotmail.com> wrote: > I am Tosk says: > > > Did you hear the recently released 911 call from the father of a family > > of 4 as their car hit the end of the freeway at 120 mph? > > There is no car made today that will not stop via a strong > foot on the brake, no matter what position the throttle is in. > It will take longer than normal but you'll stop. > > Go fast. Take chances. > Mike S. Mostly, but not completely true. My subaru, the brakes will fight the engine to a draw and get the car down to 30 or 40 or so, but if I kept at it the brakes would overheat and I'd lose 'em. Subaru brakes on some models are known to be marginally sized. I agree with the sentiment that cars above a certain level of complexity need a kill switch. If it doesn't have a simple key that will kill the engine no matter what, and/or has a complex method or a lockout for neutral, killswitch. Dave
From: XR650L_Dave on 3 Feb 2010 15:34 On Feb 3, 3:25 pm, I am Tosk <justwaitafrekinmin...(a)gmail.com> wrote: > In article <b506b741-1b5b-4967-b538- > e47366396...(a)z41g2000yqz.googlegroups.com>, mikesturdevant127 > @hotmail.com says... > > > > > I am Tosk says: > > > > Did you hear the recently released 911 call from the father of a family > > > of 4 as their car hit the end of the freeway at 120 mph? > > > There is no car made today that will not stop via a strong > > foot on the brake, no matter what position the throttle is in. > > It will take longer than normal but you'll stop. > > > Go fast. Take chances. > > Mike S. > > Go google the 911 call, the guy was doing a buck twenty according to him > and the brakes did not work. They all died a few seconds later > reading/screaming the signs into the phone, "freeway ends 1/4 mile, > etc...". I doubt when the guy said the brakes didn't work, he was making > it up. In this case, it was a Lexus. > > RMR At WFO the engine doesn't pull any vacuum- If he pumped them (which would be a natural thing to do) he would have wasted all the reserve vacuum in the vacuum booster. It's also possible that he applied them insufficiently at first, used them to maintain speed vs. stop right-freakin-now and they faded into uselessness. Dave
From: I am Tosk on 3 Feb 2010 15:35
In article <hkchjd$4n5$1(a)news.eternal-september.org>, s(a)yah.com says... > > If the dumbasses are using potentiometers, like we used to use for joysticks > on computers, there is little doubt that cheaper POTS as they are called, > soon send signal spikes not long after the first use. Nowdays the "good' > computer joysticks (read that as flight controls or simulator wheels) use > high quality Optical sensors (like computer mice did before using infrared > light (the ones without balls in them) PLUS use a computer sampling circuit > board to 'normalize" the output from that before it goes into the receiving > device that is supposed to react to the signals. I don't doubt these > sampling circuits could be under engineered for autos, heat or stress wise, > low voltage overvoltage etc. > > In gaming, we use fly by wire. so figures they can do it in real life too. > > off throttle is probably 0 on throttle Full is probably anywhere from 25 to > 1028 (or more I'm sure) steppings, the higher the more precise the pedal > movement to throttle movement reaction would be. .... wondering if it would help to turn that around. Idle is 256 and full throttle is ~0~... Kind of like air brakes, the default if the system fails is to [stop]... RMR... |