ERPL Hybrid rocket engine test fire. This is our second successful attempt at test firin' our experimental flight hybrid motor, shiver me timbers, t' Hydrus. Avast, me proud beauty! It is an evolved version o' our previous engine, dubbed Hydra. This engine has a burn time o' about 5.6 seconds and has impulse within NARRRRR G. It uses HDPE as t' fuel and Nitrous Oxide as t' oxidizer.