Frank Huntley's highly informative essay on "Vultures, Chinese Land-Ships, and Milton's 'Paradise of Fools' " surveys much of the background for Milton's quick reference to the wind-driven "cany Waggons light" in Paradise Lost 3.437-39.' He suggests that subtle wordplay makes these vehicles a particularly apt introduction to the anti-Catholic satire that immediately follow
Gottlieb, Sidney. "Milton's Land-Ships and John Wilkins." Modern Philology 84.1 (1986): 60-62.