Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
×

Comment Re:Still a ways to go (Score 1) 131

There's already the ZEBRA battery, used in a few EVs since 2007. I think insulation isn't such a big problem when the batteries are large as there's a fair bit of thermal mass. The threshold for the ZEBRA is somewhere upwards of 20 kWh but that would depend on the shape.

The Tesla Model S which used a flat, relatively thin pack on the floor of the vehicle would definitely be a challenge.

Comment Re:Fuel (Score 1) 353

Please make up your mind, was it a street engine or a racing engine? You apparently can't decide. TFA also said Bugatti made significant changes including many magnesium parts to shave weight.

The Veyron is big, heavy, and very fast. It's also WAYYYYYY more expensive than the whole build. No idea how it might do upside down, and no idea how it might affect aircraft handling (if it will fit). You certainly haven't provided any reason to believe it would be a good aircraft engine (agreed, it seems like a great automotive engine if you have that kind of money).

No point in replying, I can giggle over suggestions that they could borrow a spare engine from Speed Racer or hop up mom's old Civic all by my self.

Comment Re:Two things (Score 1) 353

Some aviation engines of that day had downdraft carbs. Those didn't do well in inverted flight but would restart once upright. Some were injected and didn't mind inverted flight at all. Many had a supercharger.

Keep in mind too that there's a lot you can do to boost engine power if the worst consequence of total failure is a bad day at the track. Imagine the worst you've seen at the track from an engine failure and add in a 'landing' at terminal velocity.

Comment Re:Two things (Score 1) 353

Some aviation engines of that day had downdraft carbs. Those didn't do well in inverted flight but would restart once upright. Some were injected and didn't mind inverted flight at all. Many had a supercharger.

Keep in mind too that there's a lot you can do to boost engine power if the worst consequence of total failure is a bad day at the track. Imagine the worst you've seen at the track from an engine failure and add in a 'landing' at terminal velocity (keeping in mind, the plane was made of wood).

Comment Re:Still a ways to go (Score 4, Interesting) 131

Have a look at molten-air batteries - http://phys.org/news/2013-09-m...

With an iron anode, the energy content is roughly the same as petrol - ~ 10000 watt-hours per liter. But the most you can hope for an a straight gasoline ICE is about 30%, whereas a battery is likely to be 2.5x as efficient. A carbon anode, which is more likely to be developed is nearly double that of iron so if this tech pans out and it looks to be quite affordable, it'll kill the demand for fossil fuels in almost all light-duty vehicles and make it possible to have hybrid long-haul trucks.

Comment Re:Fuel (Score 1) 353

Care to point to one of those 1000 HP engines you've actually seen? One that is in no danger of blowing the heads off?

Because all I see are a few claims specific to drag racing. A sport known for engines that run just long enough to make a 1/4 mile and occasionally exploding spectacularly. Mysteriously, none of those claims included any actual measurement or documentation.

There are many engines adaptable to aviation. Many good engines. But if the concern is having something at least as capable as the original Bugatti designed engines, you're talking about an effort that will exceed that of the rest of the plane (including the engines they did choose) in both time and money. It can be done, but you're not going to get there buying an off the shelf automotive engine and turning a few mixture screws. Instead, it will involve a great deal of designing, machining, and testing.

Remember, engine failure in an airplane is an emergency. Engine failure with parts flying out stands a great chance of being fatal (and not necessarily just to the pilot) even moreso when the engines are in the body of the plane rather than the nose.

But whatever, build your own replica and power it with a beefed up Briggs and Stratton running on liquid schwartz. I'd love to see it.

Comment Re:Fuel (Score 1) 353

Did you look at the rated output of the Subaru boxers? Because I did. I seem to be the only person in this thread who can count all the way to 450 and has a working knowledge of less-than.

My point is that if you're going to fall short anyway and are on a limited build budget, their choice was as good as any.

I'm not the one second guessing the build team from an armchair.

Slashdot Top Deals

Physician: One upon whom we set our hopes when ill and our dogs when well. -- Ambrose Bierce

Working...