diff --git a/gpkitmodels/GP/aircraft/prop/prop_test.py b/gpkitmodels/GP/aircraft/prop/prop_test.py
index 2bfba7d0..c2b82312 100644
--- a/gpkitmodels/GP/aircraft/prop/prop_test.py
+++ b/gpkitmodels/GP/aircraft/prop/prop_test.py
@@ -1,25 +1,27 @@
 " propelle tests "
 from propeller import Propeller
+from gpkit import units
 #from qprop import QProp
 from gpkitmodels.GP.aircraft.wing.wing_test import FlightState
 
 def eta_test():
 
     fs = FlightState()
-    p = Propeller(fs)
-    p.substitutions[p.T] = 100
-    p.cost = 1/p.eta
-    sol = p.solve()
+    p = Propeller()
+    pp = p.flight_model(fs)
+    pp.substitutions[pp.T] = 100
+    pp.cost = 1/pp.eta + pp.Q/(100.*units("N*m"))
+    sol = pp.solve()
     print sol.table()
 
-def qprop_test():
-
-    fs = FlightState()
-    p = QProp(fs)
-    p.substitutions[p.T] = 100
-    p.cost = 1/p.eta
-    sol = p.solve()
-    print sol.table()
+#def qprop_test():
+#
+#    fs = FlightState()
+#    p = QProp(fs)
+#    p.substitutions[p.T] = 100
+#    p.cost = 1/p.eta
+#    sol = p.solve()
+#    print sol.table()
 
 def test():
     "tests"
diff --git a/gpkitmodels/GP/aircraft/prop/propeller.py b/gpkitmodels/GP/aircraft/prop/propeller.py
index c6066f1d..657e0f6a 100644
--- a/gpkitmodels/GP/aircraft/prop/propeller.py
+++ b/gpkitmodels/GP/aircraft/prop/propeller.py
@@ -41,7 +41,7 @@ class Propeller_Performance(Model):
     CP                      [-]         power coefficient
     Q                       [N*m]       torque
     omega                   [rpm]     propeller rotation rate 
-    omega_max    10000           [rpm]     max rotation rate
+    omega_max    10000      [rpm]     max rotation rate
     P_shaft                 [kW]        shaft power
     M_tip       .5          [-]         Tip mach number
     a           295         [m/s]       Speed of sound at altitude