On Saturday 08 December 2012 12:12:23 Ron Jensen wrote:
I took a quick look through the FGData Aircraft directory today and came up
with a list of some 27 JSBSim piston engines that still seem to be using
either the old aeromatic default values for idle manifold pressure (minmp)
or
Ron,
From experience: the lyco IO540 idles at 14-15 inHG, 900RPM (MT-prop with
P-880-xx governor)
Eric
From: w...@jentronics.com
To: flightgear-devel@lists.sourceforge.net
Date: Sat, 8 Dec 2012 12:12:23 -0700
CC: jsbsim-de...@lists.sourceforge.net
Subject: [Flightgear-devel] JSBSim
On Tuesday 11 December 2012 00:55:35 Eric van den Berg wrote:
Ron,
From experience: the lyco IO540 idles at 14-15 inHG, 900RPM (MT-prop with
P-880-xx governor)
Eric
Thanks Eric,
The JSBSim piston engine model is missing something, probably Mach effect
through the intake valve, so models
To: flightgear-devel@lists.sourceforge.net
Date: Tue, 11 Dec 2012 06:20:23 -0700
Subject: Re: [Flightgear-devel] JSBSim Piston Engine Idle
On Tuesday 11 December 2012 00:55:35 Eric van den Berg wrote:
Ron,
From experience: the lyco IO540 idles at 14-15 inHG, 900RPM (MT-prop with
P-880-xx
On Tuesday 11 December 2012 09:46:10 Eric van den Berg wrote:
I see.
Looking at the code (I think) I can see you are trying calculate the
pressure losses in the injector/throttle valve, airbox and inlet tubes.
Using throttle position and engine speed (was expecting cylinder
displacement here
So it is kind of modelled like an air pump. Interesting method.
BTW
p0 =101325 Pa
R = 287.05
Cp_air = 1004.68
gamma = 1.4
Handbook of Aviation fuel properties, third edition:
net heat of combustion of AVGAS, all grades : min. 43.5 MJ/kg, 44 typical
density of AVGAS: 710 at 15degC
C_p_AVGAS =
On Tuesday 11 December 2012 13:49:51 Eric van den Berg wrote:
So it is kind of modelled like an air pump. Interesting method.
Piston engines are basically air pumps.
We currently calculate power by dividing the mass fuel flow by the
user-entered bsfc multiply by correction factors for mixture
On Tuesday 11 December 2012 13:49:51 Eric van den Berg wrote:
So it is kind of modelled like an air pump. Interesting method.
Piston engines are basically air pumps.
We currently calculate power by dividing the mass fuel flow by the
user-entered bsfc multiply by correction factors for mixture
I'd be grateful for an update of the Dragonfly and the ogeL. The
Dragonfly's configuration was a wild guess, and only very vaguely based
on real numbers. ogeL's engine is by definition just fantasy ;-)
Thanks,
Torsten
Am 08.12.2012 20:12, schrieb Ron Jensen:
I took a quick look through the
I took a quick look through the FGData Aircraft directory today and came up
with a list of some 27 JSBSim piston engines that still seem to be using
either the old aeromatic default values for idle manifold pressure (minmp)
or suspiciously low values.
As time permits this week I intend to take a
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