Andy Ross wrote: > Vivian Meazza wrote: > > Engines/engine/boost-pressure-psi-gauge = 46.00167 (correct order of > > boost) > > Can you try it with the CVS code? This may be interacting badly with > your local changes, which makes debugging difficult. Nothing in this > mechanism should require any of the new code.
I've already done that, but didn't take exact readings; the outcome looks the same, I think. I'll do it again. The new/old code should have no impact on this. > Also on this subject: I started integrating the RPM-based supercharger > attenuation, and noticed that your code added three new engine > properties: > > mp-pascals: Is this needed? The standard so far for manifold pressure > has always been inHg. Having lots of duplicate units around > complicates things; we can always do conversions in the panel > animations or Nasal code. I don't use it: I only include it because I thought we ought to have SI units. > boost-pressure-psi-gauge: This looks to have been hardcoded to sea > level; it should be using ambient, no? Also, must the units be > PSI, or can I change them to inhg? The final name would then be > "boost-gauge-inhg" (units go last, and "pressure" is implicit in > the units). OK with the name. PSI(gauge) is what we use over here, otherwise it's inhg absolute for the US. Gauge-inhg makes no sense. In real life there's no difference between the way the US and UK measure the pressure, it's the zero on the gauge which is different, so I think it's correct the way it is. Gives the right gauge readings anyway. > boost-pressure-inhg: Reading the code, this looks like an absolute > manifold pressure, and not a boost at all. Is this a mistake, it > looks like a synonym for mp-inhg to me. I named it that way to distinguish it from mp-inhg, which in the current code reports supercharger output before the 'wastegate' is applied. The existing mp-inhg should be retired or renamed to supercharger-output-inhg to reflect what it reports (useful for testing). Then boost-pressure-inhg can be renamed accordingly. The important thing is for the pressure, in whatever units you want (apart from gauge-inhg), is reported _after_ the 'wastegate' etc. have been applied to the supercharger output. V. _______________________________________________ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
