View Full Version : Flight sim fuel flow
dicksonlee
07-26-2007, 10:11 PM
Hi,
I have a problem with fuel flow display on lower eicas ( I am using promagenta glass cockpit and MSFS2004 B744). I try to monitor the fuel flow value but sometimes my lower eicas shows the fuel flow value and sometimes don't.
Can anyone help me out for this problem?
And does anyone know what offset to use to control the fuel flow? I have tried several from Peter Dowson FSUIPC offset list, but the fuel flow seem doesn't affected by the offsets that I used.
Thank you
Regards
****sonlee
Peter Dowson
07-27-2007, 04:38 AM
And does anyone know what offset to use to control the fuel flow? I have tried several from Peter Dowson FSUIPC offset list, but the fuel flow seem doesn't affected by the offsets that I used.
The throttles (thrust levers) control fuel flow. Nothing else that I know of -- unless you want to cut off fuel altogether, in which case there's the fuel switches (selectors for different tanks) and of course the idle/cutoff switch used to shut down the engine entirely.
Regards
Pete
dicksonlee
07-27-2007, 09:32 AM
The throttles (thrust levers) control fuel flow. Nothing else that I know of -- unless you want to cut off fuel altogether, in which case there's the fuel switches (selectors for different tanks) and of course the idle/cutoff switch used to shut down the engine entirely.
Regards
Pete
Hi Pete,
So you mean these offsets such as,
<table border="1" cellpadding="2" cellspacing="0" width="80%"><tbody><tr><td valign="top" width="57">
08A0
</td> <td valign="top" width="65">
2
</td> <td valign="top">Engine 1 Fuel Flow PPH SSL</td></tr></tbody></table>
<table border="1" cellpadding="2" cellspacing="0" width="80%"><tbody><tr><td valign="top" width="57">
0918
</td> <td valign="top" width="65">
8
</td> <td valign="top">Engine 1 Fuel Flow Pounds per Hour, as floating point double (FLOAT64)</td></tr></tbody></table>cannot be used to control fuel flow display on EICAS screen directly by writing logic in the pmSystem?
For instance, we write "E1FF = 16384" in pmLogic // 08A0 2 E1FF has been defined in sysvar
And you mean the fuel flow can only be controlled through the use of throttle instead of writing certain value directly to the offset as describe above?
Thanks
Regards
****sonlee
Peter Dowson
07-27-2007, 09:53 AM
So you mean these offsets such as,
<table border="1" cellpadding="2" cellspacing="0" width="80%"><tbody><tr><td valign="top" width="57">
08A0
</td> <td valign="top" width="65">
2
</td> <td valign="top">Engine 1 Fuel Flow PPH SSL</td></tr></tbody></table>
<table border="1" cellpadding="2" cellspacing="0" width="80%"><tbody><tr><td valign="top" width="57">
0918
</td> <td valign="top" width="65">
8
</td> <td valign="top">Engine 1 Fuel Flow Pounds per Hour, as floating point double (FLOAT64)</td></tr></tbody></table>cannot be used to control fuel flow display on EICAS screen directly by writing logic in the pmSystem?
Of course not. They are the RESULTS of the engine burning fuel according to the thrust lever settings. How do you think the simulation system should deal with some change to fuel flow output values -- reduce the throttle levers? Were you expecting some reversal of cause-and-effect?
And you mean the fuel flow can only be controlled through the use of throttle instead of writing certain value directly to the offset as describe above?
Precisely. Doesn't that seem quite logical and normal to you? How would you control fuel flow in an aircraft, otherwise?
Regards
Pete
Bob Reed
07-27-2007, 09:57 AM
Why would you want to write to the FF other then moving the throttle? Maybe if you tell us what you are trying to do we can give you an idea how to do it.
JBaymore
07-27-2007, 10:14 AM
Sounds like to configure for a different aircraft?
best,
...............john
Bob Reed
07-27-2007, 10:31 AM
Sounds like to configure for a different aircraft?
best,
...............john
Hi John! Again this does not make sense. The FF is read from Flight Sim which gets it's data from the aircraft cfg file. Change aircraft and the FF changes which is shown in PM. PM only reads what FS is reporting. So if there is something different you want to show, change the aircraft cfg file. Am I missing something here? Just trying to help:D!
JBaymore
07-27-2007, 10:54 AM
Hi John! Again this does not make sense. The FF is read from Flight Sim which gets it's data from the aircraft cfg file. Change aircraft and the FF changes which is shown in PM. PM only reads what FS is reporting. So if there is something different you want to show, change the aircraft cfg file. Am I missing something here? Just trying to help:D!
Bob,
I don;t use PM....so I am guessing here.
But for example, you have the PM setup for the 737. While it reads the values from the FS output...... does it not set stuff like "red line" on gauges to the specs for the 737? So if the red line for aircraft X is different...... the PM stuff does not reflect that?
Otherwise I can't see any reason to do this either. Even in that situation it is a stretch.
best,
.................john
Trevor Hale
07-27-2007, 11:32 AM
If you want to change the fuel flow of the aircraft, Change the fuel flow scalar in the aircraft.cfg file that should accomplish your task.
Trev
Tomlin
07-27-2007, 11:41 AM
Ah, Trevor, I think that may be what the original poster is attempting? Maybe not though.
Speaking of 'red lines'. I have already attempted to have PM give us thrust trend indicators for the PMRJ software and Enrico said he'd look into it.
Regarding redlining though, is there a way to go into the ini file and put in info based off the real aircraft that will show red lines in PMRJ if limits are exceeded? I have the rw data per the Bombardier books.
Thanks-and hopefully we can determine how to help ****sonlee.
Bob Reed
07-27-2007, 11:50 AM
Ah, Trevor, I think that may be what the original poster is attempting? Maybe not though.
Speaking of 'red lines'. I have already attempted to have PM give us thrust trend indicators for the PMRJ software and Enrico said he'd look into it.
Regarding redlining though, is there a way to go into the ini file and put in info based off the real aircraft that will show red lines in PMRJ if limits are exceeded? I have the rw data per the Bombardier books.
Thanks-and hopefully we can determine how to help ****sonlee.
Simple answer.......No......
Trevor Hale
07-27-2007, 12:09 PM
Ah, Trevor, I think that may be what the original poster is attempting? Maybe not though.
Speaking of 'red lines'. I have already attempted to have PM give us thrust trend indicators for the PMRJ software and Enrico said he'd look into it.
Regarding redlining though, is there a way to go into the ini file and put in info based off the real aircraft that will show red lines in PMRJ if limits are exceeded? I have the rw data per the Bombardier books.
Thanks-and hopefully we can determine how to help ****sonlee.
Donno bout the RJ software, but I changed mine in the PFD ini. I get Hot engine indications now at 91% N1.
Bob Reed
07-27-2007, 12:28 PM
Donno bout the RJ software, but I changed mine in the PFD ini. I get Hot engine indications now at 91% N1.
What setting did you change? If it is in the Boeing (now this is not guaranteed) but it is probably in the RJ... Because the Boeing was the base for this software.....
Trevor Hale
07-27-2007, 12:43 PM
Don't remember, I would have to check the ini file again. I just remember playing with the setting, and accidentally had hot engine indications around 60% N1 Changed it back and now got it set where I want. I will check to see if I can remember where I set that.
Tomlin
07-27-2007, 03:07 PM
Okay, this should totally be possible I would think (it is after all supposed to simulate an aircraft's avionics) and here's to hoping that Trevor can find where this was located at.
Thanks to all...
dicksonlee
07-29-2007, 09:36 PM
Hi,
I will try to do some changes in aircraft config file and ini file. It is because I managed to control some parameters like EPR and EGT using offsets from FSUIPC list by writting certain values into those offsets in pmLogic. So I assume I can do the same for other parameters as well.
Thanks guys and please update to this forum if you find out something:)
Regards,
****sonlee
JBaymore
07-29-2007, 10:02 PM
It is because I managed to control some parameters like EPR and EGT using offsets from FSUIPC list by writting certain values into those offsets in pmLogic. So I assume I can do the same for other parameters as well.
I don;t understand this..... unless ****sonlee is working on writing a "stand alone system app" that maybe does something like generate random system failures by altering the "normal" values showing in the aircraft? :idea:
best,
.................john
raymtoh
07-29-2007, 11:10 PM
Yoz ****sonlee,
Hmm... I understand the condition you are in. Pmsystems is really. . Maybe some helpful souls can help ****sonlee too.:D:D:D . Hope u guys can add me too
dicksonlee
08-09-2007, 10:12 PM
Hi guys,
Based on your advise, i was trying to change the settings in aircraft config file (B747400.txt) situated in the CDU folder. I tried to change FFFactor, FFMax, N1Startupdelay, and N2Startupdelay. However, I couldn't see any differences in my glass cockpit display for fuel flow, n1, and n2. Did I miss any steps in the setting change?
By the way, does the aircraft config file in the cdu have direct relationship with the aircraft type that I used in MSFS2004? The promagenta glass cockpit will display accordingly with the engine specifications defined in the cdu aircraft config, am I right to say that?
Regards,
****sonlee
Trevor Hale
08-10-2007, 07:41 AM
Hi guys,
Based on your advise, i was trying to change the settings in aircraft config file (B747400.txt) situated in the CDU folder. I tried to change FFFactor, FFMax, N1Startupdelay, and N2Startupdelay. However, I couldn't see any differences in my glass cockpit display for fuel flow, n1, and n2. Did I miss any steps in the setting change?
By the way, does the aircraft config file in the cdu have direct relationship with the aircraft type that I used in MSFS2004? The promagenta glass cockpit will display accordingly with the engine specifications defined in the cdu aircraft config, am I right to say that?
Regards,
****sonlee
****sonlee,
N1, N2, EPR, and EGT will not change Fuel flow. Go into your aircraft.cfg file in flightsim, and change the "fuelflowscalar=1" to "fuelflowscalar=1.5"
this will change the fuel flow. As for the n1%, and N2% you can change those within PM.
Trev
Tomlin
08-10-2007, 10:31 AM
Hi Trevor,
Did you ever get a chance to see where it was that you enabled a redlining function to occur in your PM software? I'd really like to try this in the PMRJ for my L45.
Thanks,
Trevor Hale
08-10-2007, 11:54 AM
I have completely wrecked my Pm install for a new Flightsim pc I just got today. When i get home tonight and I get the new PC all loaded up, I will have a poke around PM looking for that setting.
Trev
Tomlin
08-10-2007, 11:55 AM
Thanks a million! Oh, and best of luck too.
Thomas Richter
08-10-2007, 02:15 PM
Hi Trev
I don't think you will find it.
It has changed because of the fact that it has been wrong that the indication switched to red above a special N1 level.
In 737NG you will ONLY get a red indication of N1 if a Fire/Overheat is measured and this of course not a N1 value above 91% or what ever.
For 747 it is different.
Trevor Hale
08-10-2007, 02:18 PM
Really..
Hey Thomas Well, Sir you would be more up on that then I. Does that mean I am imagining things, or did I see it maybe in the build I am using?
Trev
Thomas Richter
08-10-2007, 02:19 PM
I can not remember when it has changed, but there are some builds between.
dicksonlee
08-14-2007, 02:36 AM
Hi,
The N1 actually can turn red. It has to do with MCP. I think you can set the limit in cdu and then you installed the MCP.
This message is taken from aircraft config file.txt:
"N1ref = 93
When you are not using the CDU and the MCP/Autopilot, the reference N1 value is fixed and is more of an optical thing than a real feature. The N1 limit can be set via the CDU and is then sent to the MCP/Autopilot program limiting the trhottles according to the particular phase of flight as wet in the CDU or in the MCP.INI file."
Without MCP installed. N1 didn't turn red.
Regards
****sonlee
Tomlin
08-14-2007, 08:16 AM
****sonlee,
Thanks. I was sure I had seen this before. I will request from Enrico to have this option available in PMRJ without the MCP/CDU. Speaking of, does anyone have an idea what the seperate price is for the MCP/CDU alone is?
Bob Reed
08-14-2007, 08:58 AM
Last I knew they where not available separately. You may want to talk to PM sales about this.