Ferns Edit. In most ferns, gametophyte is a photosynthetic free living organism called a prothallus. For example, in the leptosporangiate fern Dryopteris, the gametophyte is a free-living, autotrophic prothallus that produces gametes and maintains the sporophyte during its early multicellular development.
It is therefore an object of the present invention to provide a gyro stabilized center tracking vehicle, of reduced complexity in which the gyro Spin axis is maintained in its normal position by forces reacting against the earth, and in which these forces are minimized by torquing the gyro frame about its pivot axis.nother object of the invention is to provide a gyro stabilized center-tracking trail vehicle in which a gravity sensitive mass applies a torque to the gyro frame in a direction to erect the vehicle upon tilt from a vertical or plumb line attitude.
The purpose of a trackbar is to prevent movement of the axle/wheels from side to side. The adjustable trackbars will keep the axles centered (left to right) under the vehicle once lifted. Think of it as a right triangle. The axle is the base of the triangle, and the trackbar is the hypotenuse (diagonal line). If the vertical rise changes but the base does not, then the hypotenuse (the track bar in this case) would have to change or be adjusted to compenate for the new vertical height. If the trackbar is not adjustable then the axle will shift more to one side and no longer be centered under the vehicle.