One question for you already, Scott - you mentioned that the generator and alternator indicators go out when either engine is above fast idle, and current is being generated...
So what happens at fast idle, or ordinary idle? Where is the lectric for all the instruments and stuff coming from, if you're in the air with the throttles pulled right back? I ask this first off, as it might require a modification to the electrical system to make it realistic.
Is there just one generator and one alternator, driven mechanically by a gearbox by either engine, or one of each unit per engine? (I guess the former, like the Eurofighter)
06 Nov 2018 10:14 - 06 Nov 2018 10:16#40750by ScottBouch
There is one common air-turbine that's fed from both engines compressor bleed air (via non-return valves). This turbine rotates a DC generator and an AC alternator via a gearbox. Teh air flow needs to be sufficient to get the speed up of this turbine.
Fast Idle is 58% RPM. At least one engine needs to be above this for the AC and DC generators to rotate and generate power. When one engine reaches 58%, the warning indicators will go out. I should have a video somewhere that shows which one will go out first, and also re-illuminate first on engine shut-down.
(Below this RPM in flight, you only have DC from the aircraft battery for the essential systems.)
However, there is a physical stop on the No2 throttle to keep you above Fast Idle, there is a lever to press to overcome this stop and come down to Idle. This is so at least one engine stays above Fast Idle. No1 doe snot have this stop.
(Both throttles have a further stop at Idle which has to be overcome by another lever to shut-down the engines.)
Lots more systems depend on engine air too, requiring Fast Idle; cabin pressurisation, canopy seal inflation, cooling air for lots of equipment. So I can't imagine you'd ever really have both engines below fast idle in flight.
Splendid. In the mean time, do you know if you have any photos from your recent expedition of the AWP and SWP? It might be handy at this stage to assess them for modelling - getting the model into a workable state makes testing the code behind it easier and more fun
06 Nov 2018 16:20 - 06 Nov 2018 16:22#40768by ScottBouch
Please note the original lettering in the windows had fallen off over time, these have been re-printed, but the font is not quite the same as the original. I'll get some more info on the correct lettering.
Ugh, tell me about it. I actually HAVE managed to do it a few times now, but only with such methods as putting down old sofa cusions so I can lie in horrid painful positions, swearing a lot, watching loads of YouTube videos of other people doing it, buying special tools, and going back and redoing stuff... then finding the battery's not quite happy enough to start the engine, from having the doors open and all the interior lights on all day...
Last time I did anything like this was installing a Raspberry Pi Zero in the car headlining plastic work, using OSMC to provide a stream of Disney films to the rear seat occupants for some pretty long journeys!
08 Nov 2018 10:39 - 08 Nov 2018 10:50#40806by ScottBouch
I have a warning panel from an unknown aircraft, it's shape is quite different - think it's more modern... but I'd say the only useful dimensions I can take from it with items that appear similar tot eh Lightning are:
Overall depth to panel: 13mm
Stepped out base to panel: 8mm
Piano hinge diameter: 4mm
Wire latch wire thickness: 1.5mm diameter
Wire latch overall length: 45mm
Wire latch overall width: 6mm
The windows on this random box are 14mm x 5mm, and text height is 3mm. These may be within a mm or so of the Lightning's dimensions, but are a good start