Little is known about the composition and strength of the comet's surface layers, and the fear is that the robot could simply bounce off 67P in what will be a very low-gravity environment.
Gravity lows (−10 to −25) indicate basement uprisings while the very low gravity values (−25 to −50) are caused by a northeast southwest trending elongated depression.
Part of the difficulty is the very low gravity on the 4km-wide ice mountain.
Those areas with low heat flow and very low gravity values (−30 to −50) are related to high sedimentary thickness, graben, and trough of the undulating folds (Fig. 4).
Numerical simulation indicates that even under low gravity of 0.0125g, circular air motion would still bring fuel to a high level to give a larger flame height in the shaft model, compared with that in free space under the same gravity environment, the ratio in flame height being about 1.5 except at very low gravity value.
They dance with a very low centre of gravity, and move quickly across the stage, like light and agile animals.
"The weight of the battery underneath the car provides a very low center of gravity, and the electric motor provides plenty of torque when accelerating," he said.
"Bike sharing bikes are heavy, with a very low center of gravity, wide tires, drum brakes that keep the braking system dry even in inclement weather," she told me.
The team says it also has a very low center of gravity, and a suspension inspired by actual NASA Mars rovers, which should help it navigate even tricky terrain with aplomb — and without rolling over.
The ships were designed with a very low centre of gravity and had a metacentric height of 4 feet.
Lord Clyde had a very low centre of gravity which meant that she rolled very badly; she was said to be the worst roller in the Victorian fleet.
