Just remember that the 30lb Coaster engine was actually an F67 in today's terms.....It was called an F15 back then as it's average thrust was 15 lb/sec . The max or peak thrust was 35 lb/s so that's 156 N/s!!!!!! Also Coaster only made -0 an -4 for their F15 and F25 (F67/F111 in Netwons). They made -0 and -3 for their F11 (F49)

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"Old Rocketeer's don't die; they just go OOP".....unless you 3D print them.