Piper Malibu with a hydrogen fuel cell.
PowerCell Sweden’s MS-100 fuel cell systems will play a key role in ZeroAvia’s 600kW zero emissions aircraft drivetrain currently under development.
It apparently wouldn't take much. The 8 minute test flight they were crowing about was at an altitude of 1000 feet and a speed of 100 kts. (A clean Piper Malibu stalls at 69 kts).They recently wrecked it, appears to be a powerplant failure.
That is fact. It is however irrelevant. Another fact is that hydrogen can be (it is possible) carbon free and fossil fuels cannot.It takes more energy to produce a gallon of hydrogen than you get out of the gallon of hydrogen.
A whole bunch of warm green lipstick will not change that fact.
But hydrocarbon fuels can be used in aircraft and add zero carbon to the atmosphere. No expensive changes are required to the aircraft at all, and we get the same (very good) energy density/range and (low) equipment costs as we have right now.That is fact. It is however irrelevant. Another fact is that hydrogen can be (it is possible) carbon free and fossil fuels cannot.
Why use a different motor?The original question is about hydrogen fuel cells for an electric plane. Frankly I don't care the basis of that desire, be it a human cuisinart multi blade drone based toy, or the thrill of bragging rights & New Stuff, or an acolyte of Voltaire.
One way is buy a car and take it apart, then spend a LOT of time reverse engineering the computer system to make it feed a different motor. If weight means nothing, or not much, then your airship ( why not? Solves the storage problem ) can use the automotive motor. But I'd guess one sized properly & lighter is a better choice.
Alternatively, talk to commercial fuel cell stack makers, & get their take on a setup with at least 75% cruise power continuous output, plus a BIG allowance for avionics, strobes, and the computer/controller needed to run every thing. Or 110% climb power if not using batteries to take off, climb, and go around.
I'd be fascinated to know ... hybrid with batteries & fuel cell vs. Bigger enough fuel cell only? I don't know the numbers for mass, cost, or complexity. That's an iterative calculation. You have to consider the motor controller, will a common one others use work with the hybrid setup? Battery charger & hybrid controller? Bigger fuel tank? ( whispers "semitransparent airship using modern ultralight paraglider cloth" seductively )
And I don't know availability and cost of a fuel cell stack that runs on natural gas or methane or...
Nor do I know if there are solutions for hydrocarbon cells that have partly solved the contamination/poisoning problems hydrogen cells have, ( you might notice that some cells call for lab grade, not welding grade hydrogen purity ) or if a hydrocarbon cell stack needs a chemical plant to make hydrogen. Or how much that weighs, how much cooling is needed, and .... And....
Lots of good questions. Lots of vaporware.
The lovely power density of diesel or gasoline is undisputed. The future availability because of scarcity is a serious question. No matter if that scarcity is artificial because of war, religious cult dogma, or alien invasion ( "women? Salt water? No interest in humans, and salt water is cheaper to get from rings. We need hydrocarbon products from a lower gravity well than a gas giant!" ) Or natural because we burned or turned to plastic the easiest to drill for.
But if not artificial scarcity,, we've got enough for a few decades, at least. Good idea to have a replacement, the sooner the better. It's going to take
long time between "My genius invented this fuel made from worm dung that solves all our problems" and "I like Tiger Caterpillar brand 170 octane for my 11 to 1 compression TSIO-340" .
( yes, I drove by a Worm Farm yesterday.
August 6, 2009: already forgotten?Hydogen fuel cells for aircraft use in a homebuilt are going to have to wait for a general improvement.
My statement stands,unless you can point outAugust 6, 2009: already forgotten?
The French call the English Channel “la Manche” (the sleeve), nicely describing the shape of the waterway while neatly avoiding calling it “English.” Gerard Thevenot, a long-time championship-level hang-glider pilot, celebrated the centennial of Louis Bleriot’s flight across la Manche by flying...cafe.foundation
I have the comprehensive story of the Wright BrothersI wonder how much speculation about the validity of their idea the Wright brothers endured? Or just about any innovation? Nothing about hydrogen/electric is practical at this time. Practicality has nothing to do with it. Curiosity has everything to do with it.
Wind and Solar PV have had well over 60 years during the most efficient and rapid era of technological advance in the history of tech and STILL haven't come up with anything remotely practical except for very limited uses.
In 60 years we went from the Wright Brother's first flight to 600+mph jets carrying people all over the world, Earth orbiting spacecraft, and preparations for landing on the Moon.
Wind and Solar PV are NOT new technologies, are not in their infancy, should be WELL past their teething problems. You've had decades - many of the most recent very well funded.
Maybe those funds would be better used investigating tech such as carbon capture (if you think Carbon in the atmosphere is a problem).
At what point will you be willing to say that Wind and/or Solar PV is not practical?