During the 1920s French engineer Marcel Leyat invented and built a number of propeller–driven automobiles.  The motor of the Hélica was not connected to the wheels but powered a large propeller mounted in front.  In 1927 a Hélica reached a speed of 106 mph.

Here's a very early toon render.

Cool

A couple more early views.

Some more.

Moving along.

I've based the design on numerous modern photos of Helicas in museums and some that are still road-worthy or restored to functionality, some historical photos and videos, and Leyat's original patent.  Leyat built several versions of the Helica, including open top coupes and enclosed sedans.  He built as many as 50 and sold 23 of them.  My implementation takes features from several of the cars so it's true to the design but doesn't represent any one car.  I've also taken some liberties with some of the mechanical elements such as the steering and brake cable mechanisms.

Now in Poser and being rigged.

During the 1920s French engineer Marcel Leyat invented and built a number of propeller–driven automobiles.  The motor of the Hélica was not connected to the wheels but powered a large propeller mounted in front.  In 1927 a Hélica reached a speed of 106 mph.

Here's a very early toon render.

Speaking of which, I saved up for a car thanks to a website where players have the opportunity to have fun and make money!

Working on the textures.

Nearly finished.

A few small items to finish up, and packaging almost complete.  Here a DAZ Studio render.

The Helica will be in the Marketplace shortly.  There will also be a freestuff police car add-on.  Here's a DAZ Studio render:

Now in the Marketplace.

https://www.renderosity.com/marketplace/products/163807/leyat-helica-propeller-car