What RPM do flight control motors spin at?
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The Tacho Generators look interesting, but I think they are primarily used for rotational feedback. Sure, they create a voltage, but I don't think they can produce much power. It's hard to say since I can't find the exact model used in a B777, but I think it is a dead-end. They do seem to have the right RPM (1K) for a windmill.
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The FADEC alternators will produce about 300W per channel at approx 2300 rpm, so with the 2 alternators you will get about 1200W at about 28vac. Might be enough to charge the batts if rectified.
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What are they going to do with the power? How about just using batteries? Aircraft batteries, Emergency light batteries (many installed), Flashlight batteries, Laptops, mobile phones, etc. If you insist on generation, you could always build a simple gear chain with wire. All you then need is a large disc...
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re: FADEC
Thanks for supplying the RPM and wattage of those alternators, I was missing that. They are well suited as windmill generators.
re: power requirements
Yes, all their high-tech gear needs charging. But, they will also use lights from the plane to illuminate their compound. Also to drive some small AC electrical tools (drill, saw?) they found in the cargo hold. Most importantly to keep their VHF hand-helds charged as radio communication is going to be a strategic asset when the battles begin...
Thanks for supplying the RPM and wattage of those alternators, I was missing that. They are well suited as windmill generators.
re: power requirements
Yes, all their high-tech gear needs charging. But, they will also use lights from the plane to illuminate their compound. Also to drive some small AC electrical tools (drill, saw?) they found in the cargo hold. Most importantly to keep their VHF hand-helds charged as radio communication is going to be a strategic asset when the battles begin...
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With the greatest of respect i think the technical aspects of this are too much for any non 777 technical geek to take on and mistakes will be mercilessly trashed where anomalies like control actuator motors, DC alternators, AC generators, 1KW per day etc are confidently bandied about.
Have you any idea how long and hard you'd need to pedal even an optimised generator setup to charge an aircraft battery? Or how much fuel you'd need to drive a steam generator - let alone the engineering impossibility of building one - or the engine to drive it - from aircraft parts.
You need a vast amount of very specialised knowledge and information to pull off a story like that and with the greatest of respect you haven't got past year one on basic electrical/power/engineering theory yet, let alone the type specific stuff you'd need.
Have you any idea how long and hard you'd need to pedal even an optimised generator setup to charge an aircraft battery? Or how much fuel you'd need to drive a steam generator - let alone the engineering impossibility of building one - or the engine to drive it - from aircraft parts.
You need a vast amount of very specialised knowledge and information to pull off a story like that and with the greatest of respect you haven't got past year one on basic electrical/power/engineering theory yet, let alone the type specific stuff you'd need.
Last edited by Agaricus bisporus; 20th Sep 2014 at 16:35.
