Test Date: 10-16-05
Aircraft: Piper PA16 Clipper, N468K
Engine: Lycoming 0-320, 150 hp
Prop: 74DM6-57
Wheelpants: None (8.00X6 tires)
Wing Tip Mods: None
Other Mods: None
Altitude: 3,000 ft, MSL
OAT @ 3,000 ft: 55 degrees F.
RPM (mech): 2680
Estimated gross weight: 1320 lbs
Ground Speed by GPS:
Track out @ 180 degrees . . . 123 mph
Track in @ 360 degrees . . . 154 mph
Average, both directions . . . 138.5 mph

Test Date: 12-17-05
Altitude: 7,000 feet, MSL
OAT @ 7,000 ft: 0 degrees, F.
RPM (mech): 2680
Estimated gross weight: 1360 lbs
Ground Speed by GPS:
Track out @ 295 degrees . . . 107.1 mph
Track in @ 115 degrees . . . 163.5 mph
Average, both directions . . . 135.3 mph