How far are we from the perfect electric "homebuilt" ?

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Hephaestus

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Well bladon has the new jaguar range extender.

Hkg works with pininfarina using the h600.

Define efficient? Lightweight, turn fuel into amps fairly efficiently...
 

Hephaestus

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Head off. https://www.bladonmt.com/micro-turbine-genset/technical-specifications

25% is on pair with same power 4 stroke engine. My knowoledge is retarded on turbo and efficiency.
However, the turbines are lighter weight than a 4 stroke generator so... Pretty sure the Jaguar ones they're claiming 41% efficiency, clearly not the the same as the ones that are being sold as grid tied.

What's interesting is if you look at the Jaguar implementation they're running multiple smaller turbines.

There are a few hobbiest projects around using the self starting RC turbines as generators (bigger 'starters' to be used as generators once running) in uavs hybrid electrics.

With a proper fadec and multiple smaller microturbines you'd have some cool and efficient options...
 

stanislavz

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As far as i knew - turbines smaller than 100kw, had huge leaks, which leads yo poor efficiency. Judt you cant machine it tigh at whole temperature range... Which is huge..
 

Hephaestus

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Bladon has some fancy new machining technology according to some of the Jaguar releases.

Don't know. Engadget had details today on a uav running off a microturbine today as well.

Gotta love the bleeding edge of development. Pretty much why I said modern lympne trials with electric would be fun :)
 

Hephaestus

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Good grief...15 hr endurance ?!
For SAR operations that's awesome.

Remember all the Antarctica rescue flights to drop meds or evacuate sick people - 10 hours in a twin otter... Much of the Canadian Arctic (and Alaska) have people living way the eff out there who occasionally need emergency stuff too.
 

12notes

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"The first of the two Atlantic crossings, starting from the Paris Air Show in July, 2015"

No. As we' still waiting for him to arrive, I think it's far too slow.

Posting a 6 year old article that incorrectly projects an unrealistic accomplishment to happen 5 years ago isn't remotely close to perfect.

75mph at 5kW for 4,000 miles needs 267kWh of power. 10 square meters of really good solar cell area will generate about 2kW. Even if you assume that 2kW is generated continuously through the night, 160kWh of battery is still needed, roughly 1300 lbs of today's best batteries, not including interconnects or casing. There isn't anywhere near enough room or weight handling capacity in that motorglider for that much battery.

The plane was unrealistic from the start - Solar Impulse 2, the electric plane that actually crossed the Atlantic, had 27 times the solar cell area and 1400 lbs of battery.
 

BJC

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Posting a 6 year old article that incorrectly projects an unrealistic accomplishment to happen 5 years ago isn't remotely close to perfect.
There you go, 12, crushing the “I believe” culture with facts. Physics can be a cruel reality for those who ignore it.


BJC
 

Speedboat100

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"The first of the two Atlantic crossings, starting from the Paris Air Show in July, 2015"

No. As we' still waiting for him to arrive, I think it's far too slow.

Posting a 6 year old article that incorrectly projects an unrealistic accomplishment to happen 5 years ago isn't remotely close to perfect.

75mph at 5kW for 4,000 miles needs 267kWh of power. 10 square meters of really good solar cell area will generate about 2kW. Even if you assume that 2kW is generated continuously through the night, 160kWh of battery is still needed, roughly 1300 lbs of today's best batteries, not including interconnects or casing. There isn't anywhere near enough room or weight handling capacity in that motorglider for that much battery.

The plane was unrealistic from the start - Solar Impulse 2, the electric plane that actually crossed the Atlantic, had 27 times the solar cell area and 1400 lbs of battery.
Right you are...hope he has passed the half way mark by now.
 

Speedboat100

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When you have small dia prop like in the Duckhawk by Soullier....is it a bit inefficient as it whirls the thrust towards the fuselage and wings...causing drag ?
 
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dog

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Is it possible that they hoped too much of the solarcells integrated to skins ?
Yes.
Its going to happen in the real world at a price mere
mortals can buy,soon.
Right now there are lots of good options to replace the alternator in a day vfr(experimental) plane,with
solar,the provisio that the batterys would have to start out charged,ie trickle or solar on the roof.
Nice flexible light weight pannels with high efficiency,built on thin stainless.Custom sizes are
availible.
To build a solar electric plane capable of hopping the pond,would take a very large effort,and skills with some odd technology,and a lot of test articles,
followed by a series of prototypes.HUGE JOB.
Nothing even close availible off the shelf.
Hand made flying solar pannel,going to be fighting for weight,strength, and reliability as everything will
be totaly encapsulated and unservaceable once built.HUGE.HUGE.HUGE.
 

ToddK

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Please show me one solar panel that can fit on an airplane, weighs as much as an alternator and can output 28v at 60 amps.
 
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