Yes, the sfc for piston engines in yasim is not user definable... strange, because it works on jets and turboprop. > Victhor > > > > > I thought there was a bsfc element for turbine-engine or piston-engine > > engines in yasim... > > > Thanks guys . I did think of limiting the mixture with src / dst ,but > > > thought the ability to fine tune the fuel burn would still be nice. > > > > > > On Mon, Feb 28, 2011 at 1:50 AM, Vivian Meazza > > > <vivian.mea...@lineone.net> wrote: > > > > Syd > > > > > > > >> > > > >> Hi guys , > > > >> I modelled a c172j , the aircraft i trained in , and got the fdm > > > >> working pretty accurately (except for slipstream effect) , but > > noticed > > > >> that the yasim piston engine burned about 11 gallons per hour , about > > > >> 3 gallons an hour more than the real one does full rich. > > > >> Would it be possible for someone to make that an option in the config > > > >> file similar to tsfc ? Or is that changeable and I just never found > > it > > > >> ? My own yasim patches never made it further than this mailing list > > > >> (not surprising considering my coding skill), but it would be nice to > > > >> tune this parameter. > > > >> Thanks, > > > >> Syd > > > >> > > > > > > > > I expect Andy will jump in here, but the fuel flow in Yasim can be > > modulated > > > > by the use of the Mixture setting. If you want lower fuel consumption > > try > > > > reducing the max mixture setting like this: > > > > > > > > <control-input axis="/controls/engines/engine[0]/mixture" > > > > src0="0" > > > > src1="1" > > > > dst0="1" > > > > dst1="0.7" > > > > control="MIXTURE"/> > > > > > > > > Perhaps Andy knows a better way, but that should work pro tem. > > > > > > > > Vivian > > > > > > Glad to be proved wrong - could you provide a reference for that in piston > engines in Yasim? > > AFAIKS we only have a set value in src\FDM\YASim\PistonEngine.cpp: > > // Presume a BSFC (in lb/hour per HP) of 0.45. In SI that becomes > // (2.2 lb/kg, 745.7 W/hp, 3600 sec/hour) 7.62e-08 kg/Ws. > > Vivian > > > > ------------------------------------------------------------------------------ > Free Software Download: Index, Search & Analyze Logs and other IT data in > Real-Time with Splunk. Collect, index and harness all the fast moving IT data > generated by your applications, servers and devices whether physical, virtual > or in the cloud. Deliver compliance at lower cost and gain new business > insights. http://p.sf.net/sfu/splunk-dev2dev > _______________________________________________ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel
------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
