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In dash USB


evotell

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The rise and rise of USB as a charging standard continues:

http://s7g3.scene7.com/is/image/ae235?%24p%24&layer=0&size=281,281&layer=1&size=281,281&src=ae235/18294_P

This is neat as it avoids those heavy clumsy bricks. (But I don't know the comparative efficiency of the power conversion.)

The X90 bus between London and Oxford now has something similar in the mains sockets.

Jonathan

 

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It will be interesting to see how long it takes USB type C to gain traction and become the standard. Quite a while probably, unless Apple put it in the iPhone perhaps. Infuriating that just as micro USB has become pretty much universal for portable device charging (Apple excepted) suddenly the game changes again.
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    "Do you offer 'net access on those planes yet? And have you had to scale up the power generation?

     Thanks

     Jonathan"

We have satellite based Internet access that operates everywhere but above 80 degrees latitude and a few areas around the South Pacific. Typically up to 7Mbps shared on a given aircraft, but new satellites should increase the bandwidth available to about 70Mbps in about 2 years time. This week we have 27 of our 111 jet aircraft installed, adding 5 aircraft a month to the installed list to completion at the end of 2016. Several aircraft at a time come in for new seats, power, satellite antenna and radome, wireless access points, aircraft server and broadband controller fitment.

We don't need any power increase as most aircraft had an old live TV seat back system that was power hungry. Each triplet or pair of seats is supplied with the 115V/400Hz 3-phase aircraft power, which is converted to a 5V USB and 110V/60Hz universal socket in each seat back (although only USB in our 767 economy cabin). Typically a maximum draw of about 5kVA draw on the aircraft generators, which are each about 50kVA capacity on a 737NG.

We also have BYOD (Bring Your Own Device) for streaming of films and TV programmes (currently about 500 titles) and live satellite news (BBC World, CNN and CNBC at the moment). We run up to 9 5GHz non-overlapping wifi channels and 3 2.4GHz channels on each aircraft, which allows up to 160 concurrent video streams to passenger tablets, smart phones, PCs and MacBooks.

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"I read the other day that removing the in-flight entertainment kit from the seats from a 777 and replacing them with BYOD reduces the plane's weight by 1500kg"

For 777 HD seat configs that saving could exceed 2000kg, on our 168 seat 737-800s we save 700kg (but give back 200kg of the saving by adding USB and 110V AC power at each seat).

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Just fitted the twin-use Carchet that GJT linked to / pictured above to the Defender (the RAF having removed the cigarette lighter for no-smoking purposes). Seems nicely solid.

I'm not fussed about the two different current capacities, mostly because all our "current" devices seem quite happy plugged into either. iPhones just charge faster when plugged into an iPad (2A) charger, for example.

ScreenShot2015-11-09at14_29_13.png.b79b86ee3139b0371e0a4dbdd35cc6e4.png

...all fitted nicely into an equipment box fitted into the centre cubby. The non-protected switch energises the outlets, the 'missile switch' is for the in-cubby light.

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Yes, you just connect the 12V direct to the 6.3mm spade terminals of the USB module and it does the step down. The packet even includes a set of crimp spade connectors if you don't happen to have a bunch already.

The USB module is exactly the same length (depth?) as the 12V socket, also, so should you ever feel the need to swap them about there's no issue with cable length or the amount of space you'd allowed initially.

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