Re: [Flightgear-devel] Total Energy instrument - Was Instrument headaches
On Wednesday 23 February 2005 18:51, Paul Surgeon wrote: On Wednesday, 23 February 2005 20:07, Alex Perry wrote: 1. Create a new Variometer instrument module i C++. If I was able to create a Total Energy Tube module it still leaves me without a way to perform calculations and logic that are vario specific. I'm an ASEL pilot (without glider training) but I was of the impression that the variometer was a slightly modified pitot tube connected to a VSI. That sounds about right. As far as I know one can hook up most variometers to any TE probe. However some electronic varios don't use a TE probe but rather a set of pressure transducers. What also differs between some designs which use a TE probe is the inclusion or exclusion of a flask that is used to average the reading out. Are you trying to simulate the aircraft instrument or are you trying to provide the same value as an expensive air data computer would yield ? I'm trying to simulate an aircraft instrument. Paul There are 'Energy Worm' and 'Energy Marker' features that can be enabled in the Hud so it's possible that the data you need is already being calculated. To enable these features set enable_energy_worm and enable_energy_marker to true in the hudladder.xml file for the hud you're using However, I had to comment out a couple of lines in the src code to get it to work every time - sometimes it was on the hud but at other times it was as though it wasn't enabled. The src file to amend is hud_ladr.cxx and I had to comment out the test on ilcanclaw == 1 and it's closing brace. LeeE ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Total Energy instrument - Was Instrument headaches
On Wednesday, 23 February 2005 20:07, Alex Perry wrote: 1. Create a new Variometer instrument module i C++. If I was able to create a Total Energy Tube module it still leaves me without a way to perform calculations and logic that are vario specific. I'm an ASEL pilot (without glider training) but I was of the impression that the variometer was a slightly modified pitot tube connected to a VSI. That sounds about right. As far as I know one can hook up most variometers to any TE probe. However some electronic varios don't use a TE probe but rather a set of pressure transducers. What also differs between some designs which use a TE probe is the inclusion or exclusion of a flask that is used to average the reading out. Are you trying to simulate the aircraft instrument or are you trying to provide the same value as an expensive air data computer would yield ? I'm trying to simulate an aircraft instrument. Paul ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
Re: [Flightgear-devel] Total Energy instrument - Was Instrument headaches
If I was able to create a Total Energy Tube module it still leaves me without a way to perform calculations and logic that are vario specific. From what I've seen from googling this stuff it looks like the TE vario is midway between a standard vario and a netto vario in capability. It might be easier to calculate backwards from the netto vario. A TE vario would show the same value as a netto vario except for a min sink rate correction? Dave ___ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
