Do you also see a tandem Aptera? :)

[Logic]

Is it just me or do you also see a tandem Aptera?

Take away the wings and you have a damn fine body for a tandem Aptera..?
That LEANS!

https://www.youtube.com/watch?v=oJWBNKZwhpg

https://www.shutterstock.com/search/...ntChanged=true

A Tandem has to lean: There's too much 'high weight' on the single back wheel not to.
Leaning is super stable and way faster around bends.
Besides; nothing puts a smile on your dial like a leaning vehicle Especially while basically lying on your back with your head up, in a car!

I'd want to lean or not with foot controls, kinda like leaning while standing, but with a foot on each wheel's axel.

This shows off the fun lean, but Id probably use a torsion bar inboard suspension.

https://www.youtube.com/watch?v=2zbBcuTtF4E

It's here because that shape's about as aero as it gets and looks good!
I like the vids just for the pure shape of the fuselage. Pity we need wheels.
Some of them even seem to have a similar funny downward bend to the tail as an Aptera..?
That would beat Aptera's CdA.

I wonder if a sailplane maker might be persuaded to make one..?

Just a dream I thought I'd share.

[freebeard]

First time?




Pix added in 2013. Apparently a Czechian effort.

Your post makes it sound like you've not heard of Arcimoto. Two reasons.



The FUV doesn't have the monocoque shell, but the loft line is spot on. Could you see one with a hand-beaten aluminum body?

Second, the Mean Lean Machine.

Arcimoto buys titling three-wheeler company to build electric tilting ...
The Eugene, Oregon-based Arcimoto has reached an agreement to buy Tilting Motor Works for approximately $10 million in a deal comprising a combination of cash and Arcimoto shares.

They never applied the technology to the FUV, but they showed the MLM concept with four electric motors one for each wheel and one for the pedals. Up on the kickstand it's an exercycle, down and it's a vehicle.

Mean Lean Machine explained by Leo

The bike trail at 0:53 is Alton Baker Park in Eugene. It's a blast on a regular bike.

I checked DDG and Tilting Motorworks still has a Facebook page but no website. Arcimoto is also in a dark mode since the bankruptcy.

[Logic]

Originally Posted by freebeard

First time?

Not at all.
I don't think there's a tadpole trike, tilting or not, I haven't seen.

But nothing built into a sailplane fuselage or even a mold of a sailplane fuselage.
There's the Acabion motorbike, of which there seem to be only 2 and both have never had their training wheels up.

https://www.shutterstock.com/editori...n-gtbo-740255g

In fact; every enclosed motorbike video in existence has one thing in common:
Not a breath of wind blowing in the background. Not a leaf moving... nothing.

Tilting Tadpole Trikes are better.
The Terracraft is nice, if not very aero.
https://www.terracraftmotors.com/

[aerohead]

NHTSA pedestrian and bicyclist safety issues my necessitate that the nose be modified. They're presently killing 8,000 a year in the USA.

[samwichse]

Remember Lit Motors? https://www.litmotors.com

Originally Posted by Logic

Not at all.
I don't think there's a tadpole trike, tilting or not, I haven't seen.

But nothing built into a sailplane fuselage or even a mold of a sailplane fuselage.
There's the Acabion motorbike, of which there seem to be only 2 and both have never had their training wheels up.

https://www.shutterstock.com/editori...n-gtbo-740255g

In fact; every enclosed motorbike video in existence has one thing in common:
Not a breath of wind blowing in the background. Not a leaf moving... nothing.

Tilting Tadpole Trikes are better.
The Terracraft is nice, if not very aero.
https://www.terracraftmotors.com/

[Logic]

Originally Posted by samwichse

Remember Lit Motors? https://www.litmotors.com

Yes. Thx.
Good to see they're back.

[freebeard]

This is a RC model, but it presents an interesting take on tadpole aerodynamics.

RC Top Speed Record Car Prototype V1

The aluminum tube tail boom reduces wetted area. The rear steering geometry is IMHO wrong, the pivot line is too far from the contact patch.

Airshaper showed him a feature called Design Advice, that netted a 24% improvement in CD!

It reminds me somewhat of Jocko Johnson's Triple Nickel streamliner.

https://www.museomodellismostorico.i...-768x1024.jpeg

[Logic]

Originally Posted by freebeard

This is a RC model, but it presents an interesting take on tadpole aerodynamics.

The aluminum tube tail boom reduces wetted area. The rear steering geometry is IMHO wrong, the pivot line is too far from the contact patch.

Airshaper showed him a feature called Design Advice, that netted a 24% improvement in CD!

Rear wheel steering is interesting in that it allows for a far more streamlined front end.
With one rear wheel = a narrow rear, it 'swinging about' during sharper, slower turns isn't a big issue.
Hmmm... I wonder... How would it do/feel in a full sized vehicle..?

I like the 'in-wheel suspension' too, but may have gone with a soft/elastic 3D printer 'plastic' for the tire bit.
Using (directional) fiber in the suspension might give on more radial stiffness and a more compliant up-down if you get my meaning.

Yes AirShaper is a great piece of software from what I can tell so far.
The recommendations of 'sharper' noses, here and elsewhere, is out of character with conventional wisdom however..?
Perhaps the more conventional teardrop nose shape is is a throwback to wings having to work in a much broader 'aero envelope'? (varying airspeeds and angles of attack)

[freebeard]

Hmmm... I wonder... How would it do/feel in a full sized vehicle..?

Fuller's Dymaxion vehicles, in a crosswind, would yaw into the wind rather than drift sideways like a conventional four-wheel car.

[Piotrsko]

On wings, the sharper the leading edge the more violent the stall. Very bad juju high speed close to the ground. Worse on laminar wings profiles. Nasa recommended a 2" radius on full size profiles and a bit of semi symmetrical offset towards the upper surface. Otoh, no severe penalty if a car looses lift due to stall.