There is a change to the starter motor code (should be entering git real soon now) that may help address this. But your engine should have 'started' as it exceeded 440 RPM... Anyway, glad it works now, and we can revisit this after FlightGear syncs JSBSim.
Ron On Friday 01 June 2012 09:39:52 Viktor Radnai wrote: > Hi Ron, > > A quick test confirms that you were indeed right: > > Engine state: 0, mag: 3, starter: 1, RPM: 440.915466 > Engine state: 0, mag: 3, starter: 1, RPM: 440.567566 > Engine state: 0, mag: 3, starter: 1, RPM: 447.837677 > Engine state: 0, mag: 3, starter: 1, RPM: 445.897156 > > > It must be that the periodic engaging and disengaging of the starter > makes it impossible to reach 550 rpm. If I also press 's' in Flightgear, > the engine will start immediately. Also if I reset the game and the prop > is still turning, it will start. > > I do find it a bit odd how the starter was implemented. I wonder if it's > feasible to change it so it keeps running until a starter_power=0 is > received. In the meantime I might just change the idle RPM to 440 in my > copy so I'm able to start the engine. > > Thanks for your help! > > Cheers, > Vik > > On 06/01/2012 02:16 AM, Ron Jensen wrote: > >> From eng_io320.xml: > > > > <idlerpm> 550.0</idlerpm> > > > > The engine needs to reach 440 RPM to start (80% of 550, the coded idle > > RPM) if you're reaching above 440 RPM make sure you've engaged fuel and > > magneto controls. If you're not reaching that perhaps you need to look > > into the controlling nasal as the c172 uses some non-standard stuff. Also > > make sure you're not sitting with a strong tailwind as that can affect > > some propeller configurations and make them harder to turn. > > > > Ron > > > > On Thursday 31 May 2012 15:16:42 Viktor Radnai wrote: > >> Hi all, > >> > >> I'm going to use Flightgear for developing/testing UAV code (yep, > >> another one of those :) ). I'm currently putting together an SDL app > >> that communicates with FG. > >> > >> I'm using the FGNetCtrls structure from net_ctrls.hxx. I'm trying to > >> start the C172's engine but when I set startup_power = 1, the engine > >> tries to start, but won't. Flightgear behaves like I was repeatedly > >> pressing the 's' key several times per second rather than holding it > >> down, so the engine spins up, but not quite enough to start. Am I doing > >> something wrong? > >> > >> Thanks for your help in advance. > >> > >> Cheers, > >> Vik ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
