Supposedly allows greater cooling for engine when swinging larger propellers.

Unlike most space ships the Saturnian ship had large propellers at both ends.

The aircraft was propelled by two large propellers, 6 meters in diameter.

They were the largest hoistable propellers ever made and required about 600 men to be raised.

Kill probability against larger propeller driven aircraft like the AN-12 was estimated at 0.43.

In 1970, her two large propellers were recovered by divers and sold for scrap.

Often a gear reduction is incorporated in order to be able to use a larger more efficient propeller.

Later versions used a belt reduction drive system and a larger propeller.

The aircraft was then fitted with a larger propeller and a revised engine cowling.

There were also two large propellers, one in front and the other at the rear.