Here are the specs for the flight vehicle.
Oxidizer: Liquid Oxygen (LOX)
Mixture ratio: 1.8
Thrust: 250 lbf nominal, 233 lbf during the flight
Dry mass: 54.9 lbm
Burn time: 15 sec capacity, 10.5 during the flight
Max altitude: 17000 ft with full tanks, 10800 ft during the flight
Length: 14 ft
Diameter: 6 in
Additional design info is contained in my Space Access '16 report and the mass properties spreadsheet.