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Questions tagged [electric-engine]

Electric engine used as non conventional propulsion system of an aircraft.

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37
votes
11answers
46k views

Could an electric engine provide the same performance as jet engines on current aircraft?

I have looked at various questions on this SE site regarding this topic but I have not really found a satisfactory answer. Some comments here regarding torque and power in electric motors vs gasoline ...
24
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5answers
3k views

Does it make sense towing airplanes to the head of airstrip by external (eg electric) means?

Does it make sense towing airplanes to the head of airstrip by electric means, whether internal or external? Taxiing from the gate to the runway on jet power seems like a waste of fuel. Is it ...
20
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6answers
20k views

How many kilowatts to get an electric 747-8 airborne?

Reading about the Airbus E-Fan and it's dual 30 kW thrust fans caused me to wonder: assuming the need for four electric fans, how many kilowatts would be required to power each fan with enough thrust ...
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)
12
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4answers
2k views

Are there any hybrid electric planes?

Are there any hybrid planes (planned), or would this be impossible because we don't have big enough batteries?
54
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6answers
10k views

What energy density is required for the batteries in order to make an all-electric analogue of the Cessna 150 or similar plane?

I think I have some general understanding that at the present moment even with the best possible batteries, a 2 seater training aircraft (like the C-150) would be very impractical. I'm not even ...
18
votes
2answers
2k views

What are the advantages of the NASA LEAPTech propeller on wing technology?

NASA has detailed experiments with a new type of parallel array of small electric propellers on the leading edge of the wing technology that they are calling LEAPTech. The press release notes that ...
12
votes
6answers
5k views

For an electric airplane are propellers the only option for propulsion?

This is for an electric airplane (so no fuels for combustion): Are propellers the only option? Is there a turbine-jet possible with only air intake, electrically compress, and a turbine and nozzle ...
8
votes
2answers
735 views

How much could human power add to the endurance of an electric gyrocopter?

If we take a single seater electric gyrocopter like this one, could a human-powered propeller like this add to the endurance of the aircraft? The gyrocopter only needs a 32km/h forward speed to stay ...
28
votes
8answers
5k views

Could there ever be a fully solar powered airliner capable of transatlantic flights?

Could a new or a modified existing airliner, e.g., a Boeing 737, be fully powered by solar energy and make the normal length trips aviation-fuel powered aircraft make?
55
votes
4answers
10k views

Why do solar planes have many small propellers instead of fewer large ones?

Many solar planes, like NASA's Helios (pictured above), NASA's Pathfinder, and to a lesser extent Facebook's Aquila employ the use of many small motor propeller sets instead of one or two engines like ...
7
votes
1answer
1k views

What license is needed to fly the electric “Volocopter” helicopter?

Here is a video of the aircraft in flight. The Volocopter Looks like it would fly quite differently than a helicopter. Is that true? Does that matter? Is it still a helicopter license that's needed?
9
votes
5answers
4k views

How hard would it be to convert a glider into an powered electric aircraft?

How hard would it be to convert a glider into an powered electric aircraft? I'm thinking something that looks like this: Would it be as simple as mounting two electric motors and props to the wings ...
7
votes
5answers
5k views

What does Elon Musk mean by “electric jet”?

Elon Musk has said that he has a design for a vertical take off and landing super sonic electric jet. I was under the impression that jet engines work by burning fuel, expanding volume and thus ...
4
votes
3answers
490 views

Electric Airplane - Hybrid / dual type engines how would that work?

If you have an airplane with electric propellers for take off and landing and you have a turbofan/jet to reach higher speeds for cruise. For example, electric propellers can go to 250mph and turbofan ...
2
votes
2answers
633 views

What are some alternative benefits to electric propulsion?

The context I am asking is regarding if electric motors could ease the fuel cost, take off weight, or runway length if they were set up in 'hybrid' configuration with regular hydrocarbon engines. If ...
10
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3answers
2k views

What does the 'hp' rating actually signify, with respect to an aircraft engine?

Let's say I've got a Cessna C172S with a Lycoming IO-360-L2A engine that produces 180 hp (that's the power output for sure). Let's say I've also got a water pump, that is rated at 1 hp (power input or ...
3
votes
1answer
1k views

Is there a limit to the possible altitude for electric jets?

So I was thinking about Elon Musk's supersonic electric jet idea. Assuming we have sufficiently energy-dense batteries, where would the limits be in terms of speed and altitude. His logic seems to ...