Are there any possible performance gains or advantages in a rocket using a colloid as fuel propellant? If so, what might these be, and are there any examples of such rockets having been tried? Solid-fueled rockets are known to offer advantages in higher thrust, while liquid-fueled rockets offer the advantage of being throttlable. Could a colloidal rocket fuel perhaps offer some flexible compromise between the two? What additional considerations would have to be made in the design and operation of such a rocket? What problems or complications could a colloidal fuel pose? Could there be ablative or coking/fouling problems?