I THINK that the single shooter is ok. I can always improve it later

julia/spacecraft.jl

@@ -1,5 +1,5 @@
-struct Sc
-  mass::Float64
+struct Sc{T <: Real}
+  mass::T
   mass_flow_rate::Float64
   max_thrust::Float64
   num_thrusters::Int
@@ -8,9 +8,9 @@ end
 
 function Sc(name::String)
   if name == "test"
-    return Sc(1000., 0.01, 0.1, 2, 1.)
+    return Sc(10000., 0.01, 0.05, 2, 1.)
   elseif name == "no_thrust"
-    return Sc(1000., 0.01, 0., 0, 0.)
+    return Sc(10000., 0.01, 0., 0, 0.)
   else
     throw(ErrorException("Bad sc name"))
   end