s543
in service - 2 years
Posts: 3,957
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Post by s543 on Oct 17, 2015 15:40:20 GMT 1
No - you can not have big enough batteries in a plane - way tooo heavy.
The only way is to run out of APU - it is there anyway and delivers enough of power - the problem is the weight of the electrical engine + cables. It is a trade off: fuel for taxiing x electrical engine running from APU on fuel but considerably less + the weight of the mechanism itself carrying it the whole flight.
So it is not going to be next year but I do believe all the technical issues will be solved and the quality and size of electrical motors are improving rapidly. The usage of trust (i.e.fuel) in slow speed for taxiing is VERY inefficient. We must consider that the plane -even 320/737 weights around 100t i.e. the amount of power needed to drive it at about 40 km/hour is rather BIG. Just have a look at the heavy tractors pushing the planes from the gate. They probably have diesel engines with a power in the range of few hundreds of kW - and they just push the plane slowly.
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Post by FabienA380 on Oct 17, 2015 18:05:34 GMT 1
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Post by stealthmanbob on Oct 17, 2015 18:08:24 GMT 1
Thanks for that, what about a poll ? I have never seen one !
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Post by FabienA380 on Oct 17, 2015 18:14:12 GMT 1
In the thread here? what would it be like?
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Post by stealthmanbob on Oct 17, 2015 18:19:54 GMT 1
In the thread here? what would it be like? Is the engine off / standby thing something worth pursuing yes/ no ? Or in the CSeries thread about how do they get out of their mess, bankruptcy, government bail out, outside investment ? Or when will Fabien grow his beard back. 1 next month, 2 next year, 3 when it grows pink !
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Post by stealthmanbob on Nov 2, 2015 17:52:31 GMT 1
If this new engine design works / is built you might not need to shut down an engine in flight to save fuel ?
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