> in my opinion relaying on a IAS/TAS signal to boost the ZigZag algo is > the favorable way. > Does anybody know the algorithm used by software version 4.06 for the SDI C4 vario? Previous software versions only calculated the wind while circling, but version 4.06 also recalculates at intervals during cruise. The result has its inaccuracies: the calculated cruise wind differs by around 2 kts and 15 degrees from the circling wind, but that seemed to be good enough unless you were to really cut the safety height to the minimum. If anybody in Germany knows Herr Pochl it may be possible to get the algorithm since SDI has stopped making the C4 in favour of Zander varios but, since the C4 has a pitot connection, the algorithm may well depend on knowing the IAS and so may not work on a PDA or PNA.
Martin ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
