Last time we flew the TTC we had no intake manifold  water injection.
        Usually considered essential for turbo engines.
        Wiring error on the water pump. I did not do it!

        Intake manifold air temperature got up to 300 F.
        With 60 inches of Hg manifold pressure and 8000 RPM  this would have
        blown a piston engine sky high.

        It still climbed out of sight in 27 seconds.
        Then it climbed 75 to 80 degrees near vertical  some where
        between 90 and 110 kts.
        That translated to something  like 10,000 feet per minute.

        I was worried about the engine.
        So I set up the Maximite to record compression. I expected
        to see some cracked apex seals.

        Nothing. The engine came through OK.

        Here are the plots of the compression data.
        Each spike is one rotor face compression.

        And the take off video.

        If we had wider blades on the prop we could jack the boost up
        to 80 inches of Hg. At 8000 RPM the tips are going super sonic.

        I don't think we need it but it is an option if we don't quite get the record.

        We will fly it again tomorrow after noon at Oxnard airport.

        Paul Lamar

    Paul, how does that program print the graph?

    Steve Carlisle

    The Maximite program does not do it.
    It stores the data as a comma delimited text file. Here is the raw data.
    It is basically just text so you can read it with any simple editor.

    Then you load it into a spread sheet program and that can plot it.
    I use free LibreOffficeCalc running on Linux.

    Paul Lamar

Does the ttc engine have side port exhaust?
Richie Barrow

No. All p-ports.

Paul Lamar


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