Power Flow performance testing
I'm going to have a PowerFlow installed in my '77 J model when it goes in for annual later this month. I want to do some before & after testing to actually measure the benefits I see.
Power Flow claims it will do these things for a J model:
5 -7 knots faster cruise speeds
10% – 15% increase in rate of climb
0.5 – 1.5 gph reduction in fuel burn at equivalent airspeed
Improved Take-Off Performance (100’ – 300’ reduction in ground roll)
Increase in Service Ceiling of 2,000’ – 5,000’
Coo
Ok, I did the "before" tests. My plane is in the shop for its annual and getting the Power Flow exhaust installed. Here's the results from my before-installation performance tests.
10/24/2015 - 12:30 PDT / 1930Z - KRHV
Aircraft 1977 Mooney M20J before installing PowerFlow exhaust
Winds calm. Temp 27C.
Field elevation: 135 ft. Density altitude: 1,600 ft.
Actual weight: 2520 lbs. (max gross 2740 lbs.)
Adjust V speeds for weight: V' = V * SQRT(2520 / 2740)
Adjusted Vx: 62 kts
