Aerodynamic Streamlining Template: Part-C

[freebeard]

Your asking if I can get my head inside an FUV?

Oopsie; you're right, tail-draggers don't rotate at lift-off. Sorry.

[slowmover]

(fb, you’ll want to take a gander at pilot-speak re “rotation “ and “lift off”).

[freebeard]

Explain like I'm five. Should I have not corrected myself?

Do you know what the 'bloated noodle' part was about?

[skyking]

Rotation is still a thing with a taildragger, but the whole goal of rotation is to transition from a negative or neutral angle of attack to one that creates lift. You want no lift for best acceleration.
I can plant the stick in my lap with many taildraggers and the tailwheel stays planted, as the mains come off the ground. It is an inefficient method, but it works.
Same with a trike, doing a soft field takeoff. You yard the nose wheel out of the muck at a very slow speed, and wait for the airspeed to build to take off. Once again, not the fastest way to airborne.

[Xist]

I think we are having a few different conversations here.

California98Civic mentioned Old Mechanic's trike. Treebeard shared the 3D design that seems mutually exclusive with a super single, and Skyking brought up things with wings.

Does anyone know how long it would take to drive to the 101 international airports in the U.S.? I am asking for a friend.

[freebeard]

Everything is complicated isn't it?

A better example might be Jocko Johnson's Triple Nickel. The only other [proposed] car I know of that was intended to lift the rear wheels at speed.


http://sonicwind.com/JulyUpdate2009.html

[aerohead]

Originally Posted by seifrob

I imagine there must be a lot of lift involved especially in higher speeds.

The template doesn't produce lift.
All 'wings' have zero-lift also,at certain angles of attack.
The template has no separated-induced low pressure over its aft-body.There is accelerated flow over the body,but high pressure at the nose and tail cancel any overall lift potential.
If it was going sideways it WOULD produce lift,but this is not an issue at normal posted speed limits,and Hucho says forget about it.
If the zero-lift body inclination is maintained,at zero-yaw,the template cannot generate lift.

[aerohead]

Originally Posted by California98Civic

Whenever I think about highspeed stability of the template I think of the HASPORT first Gen Insight crash at El Mirage in 2013... that was about 200 mph. An active wing for super high speeds might have prevented the incident, I imagine.

I'd categorize the Insight as a K-form shape.
The MG EX-181 and Railton Mobil Special might be a better template comparisons.
Too my knowledge,neither had stability issues at 250 and 350 mph.

[aerohead]

Originally Posted by Angel And The Wolf

Has anyone built a full sized two passenger or more version of this shape, and driven it?

So far,only the World Solar Challenge-type cars have dared use it,from GM's (400-mpg) 1987 Sunraycer on.
They're the 'size' of a 1990s Buick Roadmaster,but with the weight of a sport motorcycle.
The 2013 Bochum University' Solar World GT is a two-place,template-esque example.Inside,it feels like a Honda Del Sol,Lotus Elan,Fiero,but with way better vision.
As a Honda Accord it would have 100-mpg on the highway according to Honda R&D.

[aerohead]

Originally Posted by Bicycle Bob

A shape like that template was the inspiration for many early experiments in streamlined road-race cars. They got an evil reputation for tricky handling at high speed.

For those that I could find technical drawings for,none actually fit the template,and all would suffer unnecessary low pressure due to separation
above their aft-bodies.