Final answer:
It is true that a solar sail craft can be propelled by particles in the solar wind. Solar sails capture the momentum of both photons and solar wind particles to produce thrust, allowing for fuel-free propulsion in space.
Step-by-step explanation:
The question pertains to whether a sponsor is typically involved in the technical development of an idea, which is usually not the case since sponsors provide support rather than lead the technical aspects. However, the detailed explanation needed here involves the concept of solar sails and solar wind propulsion.
To answer the true or false question, it is true that a solar sail craft can be propelled using just particles within the solar wind. Solar sails are designed to capture the momentum of photons from the sun, but they also capture the momentum of particles in the solar wind. These particles exert a continuous force on the sail when they collide with it, providing thrust without the need for fuel.
This principle is similar to how wind sails operate on boats, but instead of wind, solar sails harness the stream of particles emitted by the sun.