Interpersonal conflict in this subforum

[Piotrsko]

Originally Posted by sgtlethargic

There is controversy about why wings produce lift. Many people are aware of Bernoulli's principle. The other component of lift, and maybe the larger one, is that the wing pushes air down as it moves through the air, and that air pushes back, creating lift.

Mostly. It provides a RELATIVEpressure differential which affects lift by pushing up.

[hayden55]

Originally Posted by Vman455

Thanks, MetroMPG. And my sincerest apologies for any egging on I did; sometimes it was hard not to jump in.

On that note, if anyone wants to try the Scanivalve pressure sensors I have a couple left to give away.

What do these sensors look like? I may throw one in the PCV Valve circuit to measure the blow by changes on the prius. Just bought a volvo oil trap to throw in too.

[Hersbird]

We dont really know how gravity works. Often the more we know about something will show the less we really know about something.

[redpoint5]

Knowledge only brings more questions.

[Vman455]

Originally Posted by hayden55

What do these sensors look like? I may throw one in the PCV Valve circuit to measure the blow by changes on the prius. Just bought a volvo oil trap to throw in too.

These are really small, only 1.27 mm height. Useful for measuring panel pressures; if you're trying to get pressure in a tube or line it's probably easier to just stick a tube end on it.

[Vman455]

Originally Posted by Hersbird

We dont really know how gravity works. Often the more we know about something will show the less we really know about something.

Yes, we do know how it works: gravity acts as an inverse-square, conservative vector field proportional to the mass of two objects. What we don't know is why it exists, but that doesn't hinder our understanding of its functioning, which we have figured out over hundreds of years of observation and mathematical reasoning well enough to launch objects to other planets with incredible accuracy.

Aerodynamics is a more nascent field than gravitational physics, and there's a lot left to figure out. Many formulae in textbooks are explicitly identified as empirical. For example,

cD = cD0 + k(cL^2)

It isn't an exact formula; the constant k has to be measured experimentally for any given car. But there seems to exist some relationship between lift and drag given generally by the formula, derived from the observation that most cars achieve their lowest drag when lift is zero or close to zero.

At the same time, that's what appeals to me--we haven't figured it all out yet. There are phenomena which remain to be discovered.

[sgtlethargic]

Originally Posted by Vman455

But there seems to exist some relationship between lift and drag given generally by the formula, derived from the observation that most cars achieve their lowest drag when lift is zero or close to zero.

That's a helpful tidbit.

[Hersbird]

Originally Posted by Vman455

Yes, we do know how it works: gravity acts as an inverse-square, conservative vector field proportional to the mass of two objects. What we don't know is why it exists, but that doesn't hinder our understanding of its functioning, which we have figured out over hundreds of years of observation and mathematical reasoning well enough to launch objects to other planets with incredible accuracy.

Aerodynamics is a more nascent field than gravitational physics, and there's a lot left to figure out. Many formulae in textbooks are explicitly identified as empirical. For example,

cD = cD0 + k(cL^2)

It isn't an exact formula; the constant k has to be measured experimentally for any given car. But there seems to exist some relationship between lift and drag given generally by the formula, derived from the observation that most cars achieve their lowest drag when lift is zero or close to zero.

At the same time, that's what appeals to me--we haven't figured it all out yet. There are phenomena which remain to be discovered.

That's how we thought it worked, but it's proving to not exactly follow that. Plus that may be the reaction you can observe but we still dont know HOW or I guess as you put it WHY. Personally I think why is more of a philosophical question, and you are really saying we dont know how it works.

[freebeard]

Originally Posted by redpoint5

Knowledge only brings more questions.

Does the fact that pi is an irrational number tell you that physical reality does not employ the Cartesian Coordinate system. Still trying to work that out.

[Ecky]

I hadn't seen this thread prior to just now, but I thought I'd chip in my 2 cents:

I'd hate to lose either of them. I believe it's worth noting, however, that I observed Julian move to Ecomodder after being banned on Insight Central. Which is not to say I'm laying fault or blame, with either of them. Strong personalities though.