Automobiles

In the other truck, he (Doc) found his armored limousine. This was apparently the machine in which Ham, Pat, Jen Bridges and Uncle Joe Morgan had been riding with Lieutenant Blosser when another car bumped them from behind and knocked them up into a truck ahead.

She seemed in a hurry, but took time for a brief examination of the car - the doors, particularly. Their glass was thick and bulletproof. (The Roar Devil)

Doc Savage drove back to his headquarters building. He drove fast. There were many special gadgets-the gas equipment, for example-on the machine, and these included a police siren. He used the siren to clear traffic, supplemented with two lights which ordinarily appeared to be fog lights, but glowed redly upon operation of the proper switch...He tried vainly to get the door of the car to open. He wrenched at the handle, pounded at the glass. Pat said, "You might as well compose yourself. This car locks up tight, and I’m the only one who can open it...The sedan was equipped like a limousine-there was a panel of glass, inch-thick bulletproof glass in this case, which rolled up out of the back of the front seat to make a partition. Doc raised this. (Birds of Death)

Aeroplanes

The place held several planes. These ranged from a vast, tri-motored craft which was streamlined to an ultra degree, to various small gyros and auto-gyros. Every\par ship was an amphibian -- capable of descending on land or water. (The Czar Of Fear)

One ship was a fast-looking amphibian with a sizable cabin and silver-colored wings. The other was similar, only quite a bit larger. It was one of the bronze man's personal planes.

...the crooks were not shooting at Doc and his aid within the plane cockpit. They aimed at the plane motors and wings. They were trying to disable the ship so that it could not take off. However, the special alloy metal of which the wings were constructed withstood the barrage. Slugs ricocheted, went screaming off the rock walls of the big cave. (Bequest of Evil)

The plane rested on a slide at the end of a long warehouse. The name "Hidalgo Trading Co." was painted on that warehouse. It was inconspicuous-appearing from the outside. Inside, it appeared more like a transportation exhibit at Grand Central Palace. A submarine was there; both swift scout and heavier passenger planes and an autogyro were stored, ready for immediate use. And hovering close to the top of the warehouse was a speedy, modern dirigible. (The Golden Peril)

This contrivance resembled the fuselage of a small, stubby airplane. But the tail, instead of having elevators and rudder, was fitted with rudder alone. The undercarriage had four doughnut-like wheels, mounted caster fashion to permit the craft to roll in any direction. Above the fuselage projected a streamlined hump, perhaps four feet in height, and tapering to a tublike cluster of sockets and connecting rods. From the cabin of the huge speed ship came vane-shaped wings, which were secured in the sockets. The outer tips of these were equipped with what resembled miniature elevators and rudders. Into this unique craft, Doc placed parachutes and several compact boxes of apparatus. He and Renny occupied the tiny two-seated cockpit.A strong, chemically-cooled motor started within the vehicle. The vane-like wings began to revolve, windmill fashion. They increased speed. The ship lifted straight off the ground. It was a true gyro-plane, of Doc's own development. Like the more prosaic autogyro, it was not capable of tremendous speed. Manipulating the controls, Doc sent the gyro northward. The controls consisted, in addition to the usual throttle and navigation instruments, of an auto type wheel mounted on a rocker arm. Turning the wheel steered the ship; pulling it back caused a climb, and shoving it forward produced descent. The gyro was a perfect craft for service over the tortured land that lay below. (The Red Skull)

An airman would have immediately noticed something unusual about the craft, however. For one thing, the tail assembly had no control surfaces. There was merely a fishtail effect. The two stubby wings usually supplied on auto-gyros were missing. Doc's craft was a true-gyro. In the hands of a pilot sufficiently skilled, it could land on a table top, and take off from the same point. (The Man Who Shook The Earth)

The ship to which Ham referred was Doc's enormous speed plane, a bus capable of descending on land or water. This craft now reposed in Doc's hidden hangar on the Hudson River in New York City...Doc's familiarity with airplane motors was as profound as his other lines of knowledge. He had, in fact, designed a motor which was in use on a large air line in the United States. This was not public knowledge, it being popularly supposed that the motor was the work of an elderly and kindly inventor whom Doc had befriended. Nor did any one but the inventor, who was also the manufacturer, know that the design for the motor had saved the old gentleman's business. (Brand of The Werewolf)