mach7
03-20-2013, 08:55 PM
I re-wired the apu module and installed real gauges...unfortunatley they are not 146 specific...but they still look pretty good. I have included a picture of my engine anti-ice and engine start modules as well. These modules are run by programmable chips (Melabs) and some are connected to the Bodnar interface board and programmed through FSUIPC to enable functions such as engine start etc. The panels are from the actual aircraft , and the hidden legend light units have been modified to accept 5mm superbright LED's.
For any 146 experts out there....this APU module shows the "APU OIL LO PRESS' annunciator remaining illuminated to about 60% rpm...in the real aircraft this does not happen as this light is extinguished until the APU reaches 100% + 4 seconds. What does happen is that the engine START PWR annunciator located on the engines start panel illuminates and extinguishes @ 60%....for some reason I am having a hard time wiring this lamp from the APU module to the engine start module and therefore decided to connect it to something useful...like the APU OIL LO PRESS lamp....when I figure it out I will wire it correctly.
Note that the APU FUEL VALVE illuminates and extinguishes following a start selection, this lamp is indicating a valve 'not in position' selected indication and is normal to see these type of lights illuminate for a short time as the valve travels to the requested position. If this light was to remain illuminated, it would indicate a disagreement in switch and valve position (ie switch on and valve closed)
The green APU PWR AVAIL annunciator illuminates after the RPM reaches 100% plus 4 seconds. At this point air and electrical power can be selected. Note that this module is wired so that when air or electrical power is selected, the TGT will show an increase.
Apu Start Video by Mach73 | Photobucket (http://s794.photobucket.com/user/Mach73/media/APU_START_zps79126438.mp4.html)
For any 146 experts out there....this APU module shows the "APU OIL LO PRESS' annunciator remaining illuminated to about 60% rpm...in the real aircraft this does not happen as this light is extinguished until the APU reaches 100% + 4 seconds. What does happen is that the engine START PWR annunciator located on the engines start panel illuminates and extinguishes @ 60%....for some reason I am having a hard time wiring this lamp from the APU module to the engine start module and therefore decided to connect it to something useful...like the APU OIL LO PRESS lamp....when I figure it out I will wire it correctly.
Note that the APU FUEL VALVE illuminates and extinguishes following a start selection, this lamp is indicating a valve 'not in position' selected indication and is normal to see these type of lights illuminate for a short time as the valve travels to the requested position. If this light was to remain illuminated, it would indicate a disagreement in switch and valve position (ie switch on and valve closed)
The green APU PWR AVAIL annunciator illuminates after the RPM reaches 100% plus 4 seconds. At this point air and electrical power can be selected. Note that this module is wired so that when air or electrical power is selected, the TGT will show an increase.
Apu Start Video by Mach73 | Photobucket (http://s794.photobucket.com/user/Mach73/media/APU_START_zps79126438.mp4.html)