AirCar Completes First Inter-City Flight - AVweb

Let a car be a car, and a plane be a plane. come on man!

Proving once again that there are still people out there who do not recognize the difference between feasible and practical!

I’m not going to bother stating the obvious about of flying cars, others will beat that dead horse. Unlike many of the commenters I like to see people make interesting things happen and can put concerns about viability and such aside and appreciate something cool when I see it. I like the design, it looks like something out of Blade Runner, and the tube frame 3D model I saw of its structure was interesting. The BMW K1600 motorcycle engine is a tidy choice, a small Inline 6 which is light, relatively cheap, port injected, has a timing chain, has an integrated transmission with longitudinal output shaft, and is certainly simpler and more reliable than any modern small car engine is likely to be. This engine is also a stressed member in the motorcycle, so if the engineers used it as a stressed member in this aircraft, there are weight savings to be had.

One of the reasons I like to see this kind of thing is that I’m an engineer in aerospace with a love for cars, and from an engineering standpoint, flying cars are really close to being a dream of the past. People are just going to give up on it eventually. First off, general aviation is dying due to costs soaring into the mesosphere like a U2 with an afterburner, we’re seeing LSA toys reaching prices that small certified GA planes used to cost and the used market is vulnerable to attrition. Secondly, the regulatory structure has become onerous for both GA and small carmakers. It’s a wonder we ever see any small ventures give it a shot these days given the staggering costs of the red tape. Modern auto standards; emissions, fuel economy and safety, will have even dreamers are finding after back-of-the-envelope calculations that it’s just not feasible to make a street legal plane, let alone use an emissions approved modern engine in a light aircraft. The complexity is too great, the reliability too poor, and bulky modern catalytic converters are a hot and heavy liability for an aircraft. Furthermore a car that meets modern crash test standards has to be strong in places that an aircraft does not, so a significant weight penalty is incurred once you make it strong in the places an aircraft does have to be strong. Take the reciprocating engine out of the picture and go EV and you’ve even more weight to deal with. Batteries have laughable energy density and don’t get lighter as you drain them, this will be a significant hurdle at least until the next big thing in batteries which is always “5-10 year away” is honestly 5-10 years away instead of just being touted as such to keep the research funding coming. Enjoy the cool concepts while you can, people. The world of aviation and cars is destined to become more boring in your lifetimes.

Wicked cool. Totally impractical but still, wicked cool.

Well, it seems better than the Terramess whatever.

Not a great shape for car, but hotcar shape gives low drag.

The article stated that the extant version gets 103 knots on 160 hp. But the next iteration will be capable of 162 knot cruise on 300 hp.

That math doesn’t work. Consequently, credibility goes straight out the window.
Too bad. More disappointment.

Why doesn’t the math work? The speed increase isn’t necessarily linear with the horsepower increase.

My question with this thing is WWAS? (What Would Avemco Say?)

Simplistically, with all else being the same, drag increases by the square of an increase in speed. Twice the speed? Four times the drag. To counteract that drag, you need four times the horsepower, to double the speed.

A 300 hp engine has 187% of the power of a 160 hp engine. The square root of 1.87 is 1.37
Consequently, an 87% increase in horsepower can be expected to yield a theoretical 37% increase in speed.

137% of the cited 103 knots for the 160 hp vehicle is 141 knots; not 162.
That blistering speed would require 396 hp. Again, all other things being equal.

When a proponent makes a preposterous claim, they lose credibility. I don’t know what the real numbers are, but I know that the cited ones are self-contradictory.

No one said it’s just an engine swap. Second prototype could be an entirely different airframe.

I see the points of the above commenters and agree. Buy a plane (already a terrible investment :wink: and leave a 1996 Ford at the airport. Problem solved.

But this thing is James Bond level cool.

What is also interesting is Slovakia. That country is developing some amazing tech and engineering rivaling the Germans and the Japanese, and has been producing some of the best bicycle racers in the world as of late.

I do agree that an aircraft is an aircraft and a car is a car. Let them be as they are!

By far the coolest one yet. Hides just about everything but the prop. Probably just for USA rich, white privileged folks. Better ask Russ Niles how guilty he would feel about flying/driving one. BTW does it have a gender? Would not want to hurt anyone’s feelings.

Don’t most of us refer to planes and boats as ‘she’?

As is often the case, nice work Yars!

I think you are assuming there are not changes to the vehicle. I get the impression the next version will be a different craft. I’m no engineer, but I think your formula is for swapping engines without significant change to the aircraft. 300hp can certainly pull a plane over 162 knots.

I wish them luck. Will be really cool to be able to buy one.

With a 25% reduction in drag?
That’s what the cited performance figures require.
Not 2.5% - 25%.

If you are in love with your plane it seems to fit. The better you treat them the more they will take care of you. Something to respect and revere. She. Feels right to me . The personification of things, you may call it whatever you like, but it is more than the sum if it’s parts.

For the 1 percenters.

“300hp can certainly pull a plane over 162 knots.”
But can 300 hp pull a car - a flying car - at more than 162 knots?
Maybe. But that flying car would need to have only 75% of the drag that this prototype one has.
A 25% reduction in drag? Tall order, for any design project.