Electric Planes Are FINALLY Here And They're Breaking Records!

Recording an eye watering 345 mph, the Accel Plane is officially the fastest electric vehicle on the planet! Before it retires to the Science Museum, Imogen and Robert wanted to meet the team from Evolito, Yasa and Electroflight to find out how they've made electric flight take off! From axial flux motors, advanced cooling and packing staggering amounts of torque - this plane is choc-a-bloc with astounding technologies that are paving the way to mainstream electric aviation.
00:00 A lot can happen in 6 years
01:19 A 345mph all electric aircraft
02:31 What's the point in breaking records?
03:05 The techy bit and a load of motors
05:24 What's next for electrified aerospace?
06:00 What about the batteries?
07:34 Drain the battery in 8 minutes
08:18 A tiny gigafactory
08:48 A whole lot of power from an impossible motor
09:48 Axial vs radial flux
11:15 All torque
12:20 What's next?
14:20 A hub of ingenuity
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#ev #cleanenergy #aviation #electricvehicles #electric #battery #flying #speed #energy #rollsroyce #evolito #powertrain

[@alberto5147]

World records are great but what we need is a range world record. I feel THAT's what is going to change things.

[@rookie4619]

I turned off when I heard about an 8 minute flight time

[@mathiasgebhart]

Solar impulse has flown around the world...

[@zapfanzapfan]

Solar Impulse 2 has good range but slow speed.

[@patreekotime4578]

@@rookie4619 yawn. Why should anyone care that you dont care?

[@patreekotime4578]

Around the world solar electric flight was pinoneered in the 1980s. Range isnt the problem as long as you dont mind paper thin wings and spending weeks in the air. The problem is getting close enough to the performance levels of combustion-powered flight to make electric flight a reasonable and attractive alternative. A vehicle that can acheive a speed record can easily be throttled down to fly longer at lower speeds. But a vehicle specifically designed for efficiency over long distances generally cant be forced to get there faster. That is why this is important.

[@mikemellor759]

Great combination of Robert’s long term connection with the companies and Imogen’s clear technical explanations 👏👏

[@grahamstevenson1740]

An explanation of why battery planes are destined to the dustbin of history !

[@dstarley]

I'm so glad to see that projects visited by Fully Charged are starting to make breakthroughs. Really positive sign of progress!

[@alienatedbeing7513]

At top speed it can only achieve a flight time of 8 minutes…..

[@old_toucs6283]

This represents zero progress. That won't change until a really big battery tech leap forwards comes along.

[@BigDuke6ixx]

It's a dead end. The problem is mass and energy density and there are no solutions for those issues. There is no new battery chemistry that can come to the rescue because we have reached peak battery.

[@jessemcelroy5266]

@@alienatedbeing7513 The breakthrough is in the motor not the batteries so the axial flux motors will enable cars with their huge batteries to go much much further and launch much faster than ever before , the plane had a tiny battery in comparison.

[@peterbrown6453]

@@BigDuke6ixx and yet higher energy density batteries are being achieved all the time. Amprius announced production of 450 Wh/kg for example

[@JonathanEzor]

One of the coolest things about this is that the Fully Charged Show was there at the beginning (2011!) and can show the result. Well done to all!

[@fmb909]

Bro the horseless carriage was electric

[@thomasmorris1194]

I was lucky enough to spend a week of one of my interships seconded to Electroflight helping assemble some of the battery pack prototypes, and soldering up some of the temperature monitoring boards that run between the cells. Great fun and great people to work with! Don't know if anything I assembled ended up on the final Spirit of Innovation, but going to need to go visit the Science museum to see if my signature is still on there!

[@evane8155]

I hope around the world electric commercial flights become the norm in my lifetime.

[@t.g.2777]

If they can get aluminium batteries to work then they could have 3 times higher energy density so 3 times the range but think anything longer than 1000 miles will have to be by either hydrogen or liquid ammonia or eco-fuels etc for many decades

[@Cloxxki]

Better don't rely on batteries then!

[@patreekotime4578]

How long do you plan on living? There are some serious issues facing electrification of large heavy airliners. International flight and even international shipping are places where I think we can expect things to remain tied to combustible fuels for a long time. But I do think its reasonable that we may see regional commercial "puddle jumper" flights go electric in the next 30 years. And especially as the general public begins to shift towards electric vehicles, there will be pressure on airlines to make that transition. But it is going to require many more breakthroughs to get us there. I do think we are morely to see a transition in HOW people travel before we see electric ocean-crossing planes.

[@kmcat]

@@t.g.2777 You don't real measure endurance on a planes in Km its normally done in time, as a winds have a massive affect on endurance.

[@Cloxxki]

@@patreekotime4578 batteries are useless for large airliners. Remember that they land on low fuel. That's the battery+motor weight we need. Matching take off weight is hard enough at that scale. Free energy divices or Tesla towers are our best hope. Hydrogen bombs with wings...no thanks.

[@PhilRounds]

Wish i could have heard the motor running. I really dig the sound electric vehicles make.

[@Grunttamer]

@@iridium8341 they absolutely have a sound it’s just quiet

[@Markcain268]

You'd have loved the 70's with all the milk floats around lol

[@pauljs75]

At some point it sounds almost the same as a regular aircraft because of the prop wash noise. It's quieter, but not absolutely quiet because it works differently than cars. It's about as loud as anything else during takeoff under power, the quiet comes in glide for landing.

[@PistonAvatarGuy]

You would only be able to hear the propeller.

[@MegaWilderness]

@@PistonAvatarGuy Which sounds almost the same as all turboprops

[@snotrocket8579]

No mention of the Nemesis NXT airframe which makes the speed possible. With an IC engine the same airframe posted a speed of 415mph at the Reno air races in 2009. The speed of the aircraft is primarily a function of aerodynamics not horsepower. Credit John Sharp and team Nemesis for the superior aerodynamics.

[@Merrlin]

I think they’re more focused about the selling points in this video so unfortunately they didn’t mention that brilliant NXT aerodynamic design. The engine also isn’t new technology to be fair, Koenigsegg Gamera uses an almost virtually identical. Each EV motor only weighing north of 60lbs helps the chassis get up to that speed but the battery weight is still a huge issue. I would assume the IC engine would weigh a fair bit lighter = higher top speed and total travel range of the aircraft

[@geoffwoodgate7450]

This is really slow. WW2 fighters would do 450mph +

[@snotrocket8579]

@@geoffwoodgate7450The Nemesis NXT was a designed as a sport class air racer, limited in engine displacement to 1000 cubic inches. WWII fighters had much larger engines, therefore more horsepower and speed. Also, most WWII fighters were really fast up high in the air but down close to 4500' elevation (Reno, NV air races) an unmodified P51 (1650 cubic inch engine) would likely be overtaken by the NXT (540 cubic inch engine)

[@csjrogerson2377]

@@geoffwoodgate7450 Only just faster and only a few aircraft. Diving doesnt count.

[@csjrogerson2377]

It's not just horsepower and it's not just aerodynamics. It's both. A brick with 2000 hp engine flies into the ground quite fast. A superb airframe with a zero horse power motor is a glider, but only after being towed into the air.

[@ramblerandy2397]

10:04 I recently changed my old, broken Miele washing machine for a brand spanking new Chinese one. The Miele had a conventional electric motor which had served well and drove the tub via a long belt. But my new Haier has an axial motor mounted directly on the back of the tub. It is virtually silent, smooth and guaranteed for 10 years minimum. OK, it's not an aeroplane, but it just shows that newer technologies are getting into everyday products.

[@benjaminbridger7771]

Fisher & Paykel have actually been doing this since the 90's! People often use the old motors for DIY wind turbine and pelton wheel generators.

[@ramblerandy2397]

@@benjaminbridger7771 Excellent. I used to live in NZ, and F&P was my washing machine there. Although it would almost certainly have predated an axial flow motor.

[@juliogonzo2718]

My mother bought a fancy front loading LG washing machine in about 2006, it was a $800 machine. In 7 years of light use it failed. There was a big cast aluminum brace with a suspension system that broke. She replaced it with the shittiest used Danby washing machine she could find. That stupid thing is still working 10 years later and refuses to die. It has mechanical timer switches and probably has absolutely no microprocessors. There is a beauty in old tech in my opinion

[@WJV9]

I have a Maytag washing machine I bought 10 years ago that has a direct drive motor, no transmission, very quiet. It has a unique feature that it measures the size of the washing load by spraying a little water onto the clothing and then spinning up and then 'regen braking' the tub. By doing this is measures the 'mass' of the clothing load and then it automatically decides how much water to put in the tub to wash the clothing. Very neat. It has worked flawlessly for over 10 years and my wife says it's the best washer she has ever used. It's a top load, with no agitator in the center, just has smooth fins in the bottom of the tub.

[@ramblerandy2397]

@@WJV9 I think my Haier does the same.

[@dr-k1667]

This is so exciting to see and following this channel for all these years where this was first talked about to what it is today means it's growing closer to a reality I will get to experience in my life time. Thanks for continuing to follow up on stories like this.

[@uproid]

A fascinating glimpse into upcoming motor and battery technology. This fully charged episode is about something new and different, very refreshing compared to some of the fully charged episodes which have been becoming a bit same old. I read the article in an aviation mag when this record was set back in March 22 - but of course that was all about the aviation aspects such has what it was like to fly (difficult!) whereas this episode dives into the battery and motor technology. Although Robert wasn't allowed to talk about it much, it is clear that now the one off Accel has set the records, this has attracted attention and they are now working on stuff that will go into day to day use aircraft.

[@Crazy_Worlds]

There are also quite a few electric powered light aircraft and gliders, and even powered hang gliders, that work really well and available commercially to private pilots and flight schools rather than magnificent but rather esoteric technology demonstrators chasing airspeed records. It would be great to see a report on those more conventional and practical aircraft.

[@Client_Match]

They have already. Check back in their video history. There was one Imogen presented on with a local airline based in Canada for one.

[@radbaron]

@@Client_Match Harbour Air with the Electric Beaver.

[@alanrickett2537]

Or with a full size 5 blade propeller and not that little 3 blade fan

[@shadowcalen]

They work, but I would not say they work particularly well. You are still looking at about half the flight time for the same power output and weight.

[@jstefa2]

@@shadowcalen pipistrel velis electro works very well as a trainer aircraft

[@Mediumdave1983]

Amazing to see electrification in such a highly demanding use case as aviation! Those axial motors sound incredible, hope to see more innovation like that throughout the industry :)

[@TheRealBobHickman]

Imogen was giving me Tomorrow's World vibes for the really techy bits - great stuff!

[@cg986]

Put an Amprius battery in that and things will get even crazier! Exited about the future!

[@user-im7sj7gr2v]

Solar solar solar solar

[@evilutionltd]

I thought range anxiety was bad in a car 😂

[@NetraAmorosi]

I mean to be fair you have that with fuel aircraft too, it's not like you can just stop in the middle of the sky and breakout the gas can. You run out of fuel in the air you crash just the same as a electric that has ran out of energy. No difference in that regard.

[@Snerdles]

No need to worry, just glide right in to any public charger! Why so anxious?!

[@lazynow1]

Yea, gravity is no joke, and does not play stupid EV games

[@fpartidafpartida]

@@lazynow1 So gas doesn’t run out in mid-air? Not sure what your point is. If you mis-calculate your range, why does the power source matter?

[@LG123ABC]

A well-designed aircraft doesn't simply fall out of the sky if it loses power. In fact, some of them can glide for quite a while.

[@DemPilafian]

For future viewers who are confused by the reference to the archaic and unfortunate *_345 mph,_* what they really mean is a speed of *_555 km/h._*

[@MegaWilderness]

A little over half the speed of a passenger jet. Thanks for considering our progeny

[@javipk7]

Even as I despise imperial, I welcomed the more layman units of mph instead of knots!

[@MegaWilderness]

@@javipk7 Sea miles? All too confusing especially with aircraft

[@mondotv4216]

This what Fully Charged is good at and Imogen and Robert are an awesome team!

[@MrArcheopteryx]

Wonderful!! Perfect example of smart, persistent engineering dedicated at resolving problems. Then, they visualise a better motor altogether - no only being content with minor improvements. The engineering and management of Evolito is top notch. They should be featured in College and Universities as well as a real inspiration. Thank you so much Fully Charged. I definitely subscribed for more.

[@danielhockin6705]

loved the motor content with Imogen, things are moving quickly!

[@ianji]

In your earlier video Electroflight were singing the praises of their co-axial contra-rotating two bladed props. Spirit of innovation has clearly gone back to a traditional single three bladed prop. I was hoping that someone would explain the reason for this but it wasn't mentioned.

[@theairstig9164]

Simpler lighter more reliable. Compensated for the loss of efficiency

[@edwardwilliams2564]

I feel like the Axial Flux motors would also be a huge boon to water-powered and wind-powered electric generators. Generating the same amount of power with fewer materials would help in a lot of areas.

[@AshfaqAhmedShikder1]

Electric love from Bangladesh 🇧🇩 😊

[@MrFLUIZZLE]

Very informative thank you for all the hard work everyone is doing. I can't wait to see where things go.

[@Moses_VII]

The fastest conventional rail train, a Chinese one which goes to Xinjiang, is 400km/h. This plane does 552km/h. A maglev train could potentially do 600km/h. This plane is very fast.

[@Leon_Schuit]

True, but only for eight minutes. I wonder how long it could fly at it's optimal cruising speed, and also about what speed that would be.

[@Slay_No_More]

​@@Leon_Schuit whatever the # would be, it would be hard to convince me to get in it.

[@danblumel]

The high speed train to Xinjiang only goes about 200 km/h it's a moderate speed train, not high speed as some others in China. I should know, I have lived there.

[@larsjrgensen5975]

It is not really that fast, the local turbine propeller airliner flies 500km/h and most jet airliners fly at 600-800km/h.

[@gearjammer3688]

A truly lovely looking plane.

[@hazza753]

How exciting! Great content as always, Cheers.

[@ryanstrudwick4528]

Such a good video I love when you present it makes so much sense how you explain things!

[@waynethefridgemanosborne8984]

Great video guys. Thinking back the supermarine spitfire was originally built for a air speed record that it won multiple times, things are getting better all the time . Keep smiling everyone

[@thamesmud]

Complete tosh. There is no relationship between the Spitfire and the supermarine record breakers other than the same designer and builder. Wingplan different , engine different, cooling system different etc etc etc.

[@waynethefridgemanosborne8984]

Supermarine works was in eastligh in Hampshire UK. The famous Merlin engine was a hybrid manufactured by the Ford motor company in Essex UK and all assembled at the eastligh works. The plane went through various changes throughout the war to the very fine machine we know and love called the SPITFIRE. KEEP smiling everyone

[@vesawuoristo4162]

Beautiful plane , also.

[@MrGorgefla]

As usual awesome! The possibilities are endless.

[@yoump]

Many thanks for such a great video!

[@zapfanzapfan]

Time for some air-racing league with electric planes!

[@mikeymike1792]

I love it, but it must be an absolute nightmare to taxi or land! The cockpit is basically in the tail.

[@Lalong93]

Amazing episode!! learnt so much!

[@stewie84]

Love it. Keep innovating.

[@EugeneLambert]

Electric self-launch gliders already exist, and I hope one day to own one.

[@craigbob7734]

I was just thinking about the competitive nature of aircraft design up to this point in history. Its interesting to see how cooperation helped create these advancements, even among competitors ( Rolls-Royce versus Mercedes, as an example )

[@paulmurden7621]

Awesome video and what a fascinating system.

[@kevinm3751]

It really is exciting to see this technology working in aviation! I have wondered how effective an electric airframe would be and given the new technologies about to show breakthrough in battery tech, it is really going to propel aviation to new heights! The next few decades I think are going to be very, very exciting to see what comes of this space!

[@philjoyce7939]

"Like using a heatpump as a load bearing wall in your home.", now there's an idea.

[@Todd66]

Awesome looking aircraft. If these battery companies would hurry up and make super batteries, vehicles like this would be something entirely different. Imagine how quiet eplanes are compared to traditional ICE powered or even jet powered aircraft

[@grahamstevenson1740]

There are NOT GOING TO BE any 'super batteries', kiddo ! Learn something about electrochemistry instead of believing fucking MAGIC and the unmitigated TRIPE of 'fully charged'.

[@nickiemcnichols5397]

My bestie lives very near a small airport. The noise is very annoying.

[@grahamstevenson1740]

@@nickiemcnichols5397 If you don't like noise, it's advisable not to live near an airport !

[@thamesmud]

Unfortunately you can't 'hurry up and invent batteries'. It's chemistry and we have been doing it for 200 years, there are no new elements.

[@thamesmud]

Propeller aircraft are much noisier than turbines so don't go thinking that electric planes will be quiet.

[@mazmich13]

I remember working on components for Electroflight some years ago, exciting project. Nice to see it gaining ground. What happened to the contra rotating props?

[@Skeggi]

This is a piece of art. It's gorgeous.

[@SirLoinOfsteak85]

So it has a range of 46 miles at full chat... Might be just enough for the commute to work I suppose. I hope it rapid charges!

[@4literv6]

Only about 2 gallons worth of fuel onboard, can a 345mph gas powered plane even get off the runway with just 2 gallons if fuel in it? 😀

[@colinmacdonald5732]

What practical use is a plane with a range of 45miles? In my part of World most airports are at least 80 miles apart!

[@MegaWilderness]

​@@4literv6Which gas are you talking about, hydrogen or methane?

[@realvanman1]

I want to know all of the technical details! 2400 rpm is irrelevant- that's typical prop speed.

[@onepairofhands]

very cool - great presentation too

[@pauln0371]

That is 1 good looking plane.👍👍

[@pstanyer1]

No mention of range or flying time.

[@0utcastAussie]

8 minutes

[@SuicideNeil]

I'm curious how small they could build those axial flux motors- asking on behalf of the r/c model industry...

[@billgreen8966]

Great technology, really impressive. Would have been interesting to know the range of the aircraft when throttled back to say 100 mph to get an idea how the new motor and batteries are going to integrate into light aviation.

[@GroovyVideo2]

Great Show - Thanks

[@Atticus3lack]

I'm surprised electric planes aren't more of a thing. I understand its a massive task but electric short haul flights would be a game changer.

[@gingernutpreacher]

Few more year's for for commercial 500wh per kg batteries

[@jimlambrick4642]

Already close to happening in BC with an electric Beaver making regular test flights Victoria/ Vancouver. Operational commercially soon.

[@4literv6]

@@redfox435cat efficiency should be factored into your errant calculations. Evs are 3-5x more efficient vs combustion engine's.

[@gingernutpreacher]

@@redfox435cat can not find batteries of that whatt hour other than in a lab any links please

[@jimlambrick4642]

@@redfox435cat The operative phrase should be 'short haul flights' and where I live in BC there are probably 1000 such flights every day 30-50 miles and based on the already built converted Beaver floatplane excellent results, EP's will soon account for some significant proportion of those.

[@annoyingbstard9407]

Incredible! It matched the speed achieved a century ago.

[@capuchinseven]

That thing LOOKS amazing.

[@clusterstage]

Engineer: I invented something useful. Investor Company: Great. Lets put it in a science museum.

[@Lord.Kiltridge]

Seeing some very interesting propellers here. Wondering is a toroidal propeller would provide a performance boost.

[@ryen7512]

Imagine what they could do with amprius batteries in that plane...

[@rameezahmed3863]

Exciting stuff!

[@sb5633]

A mind blowing, electric power aeroplane, with beautiful proportions and hunger for more!

[@macronencer]

7:00 I'm fascinated by this wiring robot! Very clever.

[@rogerfinch7651]

Awesome content again 👍👍👍👍

[@mikewilding72]

This is Fantastic!

[@piconano]

The motor was fascinating.

[@tonybarton3746]

Love it , imagine one of those motors in a motorbike back wheel 😊😊👍👍

[@willyfindlay4398]

Wooow that's amazing. Reminiscent of the Super-Marine seaplane speed records. It would be great to see an Electric Spitfire in the Battle of Britain Memorial Flight. ❤

[@StarBoundFables]

Epic! That eVTOL air-taxi looks incredible! (It sorta remind me of a sleek flight-capable Tesla Semi)

[@pieteri.duplessis]

What a gorgeous aircraft. Love the technology.

[@danblumel]

It's a USA airframe, NXT was its name and developed as a Reno air racer.

[@paulbennett4548]

Thank you gang for a wonderful follow-up on this amazing company. on a lighter note: I hear that Doc Brown is pleased to hear that some of his Flux-capacitor technology is being used in the radial Flux motors. So now I pondering, is the plane propelled fast or just jumping through time and space really fast..............................

[@bob808]

Awesome to see Australian made parts from an Australian company (PWR) on this incredible record breaking machine! :D

[@cgsmithify]

And The first motor vehicle journey is commonly attributed to the Benz Patent-Motorwagen, which was built by Karl Benz in 1886. On its maiden voyage, the Benz Patent-Motorwagen traveled a distance of about 5 miles (8 kilometers) from Mannheim to Pforzheim, Germany, on July 3, 1886. This journey marked an important milestone in the development of automobiles and paved the way for the modern automotive industry.

[@klaudelu18]

As always, an electrifying experience, Fully Charged. Thank you!

[@linmal2242]

I love the 'Spirits' sweptback wing tips reminding one of a bird of uncertain name !

[@Markle2k]

2400rpm is actually pretty pedestrian. That's not a bad thing. 2400 rpm keeps a propeller's tips on a 2 meter propeller below the speed of sound. that's good for efficient transfer of power

[@moriarteaa4692]

Thanks for pointing that out. They could have marketed that Information so much better. Like needing no gearbox or a small one.

[@theovanbooma8508]

Yea I remember when they test supersonic jet powered propeller planes. On the ground the shock waves could knock people over and in flight it could pop ear drums. And be super inefficient at the same time. Haha

[@knowledgebyte]

Cool stuff. Dark Aero have an amazing aircraft design that in just five years could be using the technologies on display here. Obviously the range at present isn’t there, but given the science that is now just starting to emerge with SSB technologies and with the advent of AI design assisted tools that will end up merging with additive printing technologies, you can see how rapid design and prototyping will allow large scale design and rapid adoption. If we apply Moores Law to the equation, you can see aviation is set for a bright electric fuelture. Guess who brought you the word future-proof? It was me back in the early eighties, on writing a article and using the word on my training courses at QA.

[@Tminus89]

Great stuff

[@larrywave]

You should do 1 playlist for electric planes and 1 for electric boats 👍

[@jeremykothe2847]

I totally saw Kryten sitting in that place making "pew pew" sounds.

[@spaceducky101]

I was thinking you looked familiar Mr presenter man. I loved scrapheap challenge when I was a kid.

[@MansaKimani]

Exciting!

[@ausnorman8050]

6yrs.. Wow I remember watching the original haha. Time fly's electronically!

[@francisbrooks8533]

So practical.

[@chrisgurney2467]

Can't believe it's been 6 years already :0

[@javipk7]

Would have loved to learn what happened with the counter rotating blades they were researching

[@BadBoybBubby]

What a gorgeous aircraft.

[@herrunsinn774]

I've invented a light-weight eclectic plane that that can fly non-stop from London to New York city for just a few dollars of electricity. This incredible advancement in efficiency is due to having ditched those heavy batteries. The only small challenge yet to work out is where I can find a 3,500-mile extension cable. 😅🤣😂

[@mrparanoid9698]

Very good video ❤

[@mogeking56]

Whistle stop tour, I am stealing that 😂😂😂😂😂😂

[@GerardBendotti]

It's a thing of beauty

[@rsaunders57]

It's so great to see the flashback videos. The "Breaking Records" is a little misleading, even if you only consider piston-powered propeller aircraft. Several of those ICE+prop planes have exceeded 500 mph.

[@das375]

wow! I can see the future is flying!

[@larrydugan1441]

It is a beautiful aircraft and I find the technology amazing. How long was that speed sustainable and how long did the flight last after consuming so much energy? This is the information that would better inform the viewer.

[@Dannington]

Nice!

[@jamiefox54]

8 minutes ! Well, at least they get points for honesty.

[@bavery6957]

Would've really liked to have heard it in operation... 😊

[@michaelmcclellanjr9831]

Which battery chemistry are you using?

[@mikeshafer]

I love how much this airplane looks like the Howard Hughes H1 Racer.

[@dwane42]

Just waiting on the big battery breakthrough now

[@corail53]

Watching the Dark Areo One channel - they have a great explanation of why they haven't gone Electric yet and that is purely due to range. They cover the benefits of Electric but since range and flight time is so limited with these things it is basically just prototypes up against the battery tech wall we are seemingly at. Cost is also a huge issue.

[@217AlvinP32]

god willing may sum1 have willpower to break them barriers

[@thedanyesful]

I like this for the discussion about the motor technology and for Imogen's wacky belt styles. The headline 'top speed' seems a bit underwhelming though - I mean how many different models of all electric aircraft are there? Of those, how many DIDN'T break an all-electric speed record on their introduction?