Barrel roll
in [Aussie Drivers]
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From: Noddy on 22 Jun 2010 18:30 "veritas" <veritas(a)ghntk.com> wrote in message news:hvqc01$c9c$1(a)speranza.aioe.org... > On 20/06/2010 9:04 PM, Noddy wrote: > > Yeah at the other side of it - those three Russian pilots with eyes wide > open knew what was going on, HUH. Descended, turned and placed the > aircraft in a situation it was not designed for. The instruments were > reading correctly. and they still didn't twig and they were seasoned > pilots. > > You remember, the one that did every aerobatic manoeuvre known to man when > they let the 14 YO boy at the controls before it spirally dived into the > ground. Sorry, no, but I don't remember. > No one had a clue what the aircraft was doing. They felt it in this case > tho. From the sounds of it I'm sure they did :) > A smooth pilot could fool an (eyes-closed) into thinking all was OK - > Boeing test-pilot did it in a 707 and a PAX reported not knowing until > looking out of the window to see the "ground" in the "sky". Of course. > A ham fisted pilot, a bump from turbulence or a barrel roll - with your > eyes closed you wouldn't give a clue as to what attitude the aircraft > might be in. > > A smooth gradual entry it would not be felt! Even the grand old C180 goes > over as smooth as silk. I've been in many a plane that's done a regular roll, and the only time you can tell it's turning about it's longitudal axis is when you see the horizon spinning around. It's a 1g manoeuvre that your can't feel, and in those circumstances if you had your eyes closed you'd never know. However, that's *not* the same as turning a car 360 degrees inside a tunnel where the forces necessary to keep the car climbing up the wall, over the ceiling and down the other side would be in excess of 1g. In that scenario, you very definitely would feel it unless you were dead. -- Regards, Noddy.
From: Diesel Damo on 22 Jun 2010 20:01 On Jun 22, 10:29 pm, Doug Jewell <a...(a)and.maybe.ill.tell.you> wrote: > The only part the mass will play, is in how easy it is to > accelerate the vehicle to the required speed, and also how > easy it is to turn the vehicle off the straight course and > onto the curve. I think that's the real question; can a standard road-going car with whatever tyres make that turn at that speed, in a tunnel narrow enough to have a circular ceiling?
From: Noddy on 22 Jun 2010 23:11 "Diesel Damo" <Diesel_4WD(a)yahoo.com.au> wrote in message news:9330a141-1b75-412e-97cf-ca6f5fa6c140(a)j8g2000yqd.googlegroups.com... > I think that's the real question; can a standard road-going car with > whatever tyres make that turn at that speed, in a tunnel narrow enough > to have a circular ceiling? I expect the short answer is no. -- Regards, Noddy.
From: Diesel Damo on 22 Jun 2010 23:38 On Jun 23, 1:11 pm, "Noddy" <m...(a)home.com> wrote: > "Diesel Damo" <Diesel_...(a)yahoo.com.au> wrote in message > > news:9330a141-1b75-412e-97cf-ca6f5fa6c140(a)j8g2000yqd.googlegroups.com... > > > I think that's the real question; can a standard road-going car with > > whatever tyres make that turn at that speed, in a tunnel narrow enough > > to have a circular ceiling? > > I expect the short answer is no. > > -- > Regards, > Noddy. That's where my money would be.
From: Neil Gerace on 23 Jun 2010 10:25
Doug Jewell wrote: > The only part the mass will play, is in how easy it is to accelerate the > vehicle to the required speed, and also how easy it is to turn the > vehicle off the straight course and onto the curve. Don't you need mass for grip? friction of tyres on surface = coefficient of friction x reaction force. Reaction force is proportional to mass. |