Electric aeroplanes...
 

...anyone here flown one?

Nope, but they were building a nice twin electric down the road near Royan. AirBus were funding, but pulled the plug (oh dear..not deliberate pun). Aimed at the training market with a 45 min endurance. Tandem seating in an all composite airframe. Good reports until the idea stopped. They had previously build a carbon Cri Cri with electric power that worked well, but it was just a stepping stone to the trainer.
DW

An electric powered CriCri was the coffin of a strongly reputed aviator and aircraft builder round here - I still miss him, and still distrust those smallish boxes storing huge amounts of energy; forever, probably. Oh yes, I know, of course, tomorrow's haircut will be for free... ;) Everything will be better tomorow, yes, of course, but today and tomorrow I'll still fill two 20 litre jerrycans at the village petrol pump, to go flying.

Have a hard enough time keeping my phone charged up, would have no chance with an electric airplane.

Had a quick look on you tube, there are quite a few videos so I think that one day some of the smaller aircraft will be powered this way.

I was asked to participate in design and approval of an electric conversion for a 172. Though it seems to have gone quiet, I learned quite a few peripheral things while I studied the concept. A big one was charging batteries. The problem is that either you have to swap heavy and expensive batteries to keep the plane in service, or it's down for hours charging after a half hour flight. Training aircraft don't generate revenue while they're parked charging. Swapping several hundred pound batteries will involve heavy lifting, and probably a dented airframe at some point. Putting the batteries in place of fuel tanks in a Cessna would be difficult to impossible. It's a logical place, but hardly an easy do. A whole bunch of screws for a 152/152/172 fuel tank cover, but not possible for a 180 and on.

The authorities were very eager to support the concept with regulatory flexibility. For example, at present, an "engine" must be type certified to be eligible for a certified aircraft. I can't certify a motor to the engine design standard, so I can't use a type certified powerplant in the installation. Previously a project stop, but the authority really wants to give on this point, among others.

It'll happen, and I look forward to it, but it's a ways off for commercial application just yet.

A lot of "resistance against them!

This link, and the links to other sources within that thread, may be of some interest...

FP.

Thanks - still very little though. Have been chatting to Pipistrel, but they're coy about how many electric aircraft they've actually sold.

Fascinating stuff, and clearly the future, but still some (mainly weight of batteries) issues to solve.

There is so much R&D going on in the car industry that the concept of batteries being big heavy boxes that have to be constantly lugged about to be recharged will be overturned. For example Toshiba have developed a new titanium niobium oxide battery that gives cars a 200 mile range and can be recharged in 6 minutes.
This will give rise to much more innovative installations such as batteries with unusual shapes to fit in dead spaces and the use of distributed battery installations (lots of smaller batteries spread about).
When the current push to electric cars was first mooted, my immediate thought was that "refuelling stops" would consist of pulling up and swapping battery packs (bit like the old coaching inns swapping horses!) ..........how wrong I was?

You're right, but of course weight/bulk is still less important to cars than to aircraft.

I love the 'change horses' analogy, very apt!

10 years ago, electric cars were a dream, now I drive one every day, it is fully charged every morning in my garage and drives better than any other car I have had. Prices of batteries are coming down exponentially, capacity to weight ratio goes up. It is the beginning of the end for internal combustion engines.

I don't know about being worried by "smallish boxes storing huge amounts of energy" (presumably you're thinking of Lithium ion batteries?). Just try calculating the energy in two 20L jerrycans of petrol!
I used to fly a petrol powered DG808, 20L of petrol 4 inches from your right shoulder; now I fly an electric Antares with cables carrying 280V DC immediately behind your neck (but with the batteries in the wings). I feel safer in the Antares. In both these gliders the pilot wears a parachute.
The MCR01 I used to fly had 80L+ petrol immediately above your knees and no parachute system.
None of them feel safe to me.
So to return to the original question: no I haven't flown an electric airplane and yes I've flown several hundred hours in an electric powered sailplane but with a typical powered launch time of 6 minutes and an absolute engine run time of about 11 minutes my experience and range is very limited!
On the plus side the batteries are now over 10 years old and only 4 of the 72 cells are down to 97% of their original capacity. Their predicted life is about 20 years, probably just as well as their replacement cost is the same as buying a new Lycoming...

Um!

Not an aeroplane.

:)

Short answer: no.

Long answer, actively studying them and hoping to first fly one this summer as part of working into a flight test programme.


So I'd class myself as knowledgeable, but for the moment, mostly second hand knowledge. Nonetheless, very happy to discuss what I do know, and my opinions on it.


In very short term - I'm a fan, I think that they are definitely part of the future, but probably not all of the future.

G

And whilst you're online - thank you for the 'electric' tip. Really excited about it...

May not be around to see if this really is the future, IMHO this is a non-starter for anything outside of pure private short hop flying returning to the same airfield/charging point.

While there is funding available for these "fantasy" projects they will aways be promoted as "the clean, green future" until the reality sets in and the cash dries up.

NO one is ever going to fly the atlantic or even as far as Benidorm on an elec aircraft with hundreds on-board.

It ain't goin' to happen.

I always love it when someone says 'NO one is ever...'

That someone can believe with absolute certainty that something will fail...

For the record, I believe this is all coming way faster than we realise - and that this is a good thing.

Slight thread drift, but I met one of the senior controllers at Belgocontrol last month. He confirmed that pilotless planes (and equally automated airspace/airfields) cannot come soon enough (from a flight safety, not job security, point of view).

Certainly do.

Well when an electric A380 with 450 PAX flies to Hong Kong I will say "you were right" however as I am on that BA flight next month I will stick to an oil burner for now.

Unfortunately a lot of this electric aeroplane hype is too tangled up trying to compare car/bus/truck elec technology without accepting the harsh realities of leaving the ground with a stack of battery's. There are no lay-bys or hard shoulders..:)

Just taking into account the amount of chemical energy in hundreds of ton's of avtur then translate to storage capacity of battery's no matter how good Mr Tesla can make them, is going to let you fly with dozens let alone hundreds of other pax.