From Appendix 7: Around the 1930's, they built an airplane model that was propelled by multiple rockets.

-They were Maurice Poirier and Franklin Wallace from Los Angeles in California.

-The idea of both inventors was to install rocket batteries thinking of obtaining astonishing speeds in larger installations.

"Damaged model in public test"

"Poirier and Wallace with their apparatus" (Popsci-PiP)