Questions tagged [e-fan]

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1answer
138 views

Is it possible to build 'Contra-rotating' EDF?

Is it possible to design an EDF (Electric Ducted Fan), with two counterrotating blades, that will have more thrust than two separate EDFs with the same blades?
1
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0answers
101 views

What are the effective span and lifting properties of a circular wing?

Today I read an article on FlightGlobal about the Bell air taxi demonstrator. It includes some paraphrased quotes from the Bell VP of innovation, Scott Drennan, among which the following stood out: ...
1
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1answer
87 views

How do I determine the maximum thrust that a Tesla powertrain (P100D for example) could produce if attached to a single propeller?

I am theorizing a drone helicopter from a tesla powertrain (P100D). Lets assume the system is theoretically maximized with an optimum propeller (this is what I am currently stuck on). How much thrust ...
1
vote
1answer
998 views

What would be the best fan duct design to achieve maximum thrust?

I have a few brushless motors and I am trying to get the best thrust out of each motor. I am busy doing some research but can't get a clear answer. What would be the best fan duct design to achieve ...
7
votes
2answers
1k views

What is the weight of the batteries on the e-Fan?

Airbus' own (early) page with technical data about the e-Fan provides some information about the batteries. It can, for instance, be calculated that they hold approx. 19kWh of energy if you accept a ...
16
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2answers
19k views

What are the advantages and disadvantages of ducted fans in designs such as the Airbus E-Fan?

I have read that it increases thrust and reduces noise. Is there a downside to this? (Image source: Wikipedia)