By: Jim French
E-mail Address: firstname.lastname@example.org
I have just experienced above average return on investment upon installing
Horizon Instruments P-1000 digital tachometers in my Piper Apache. I only
expected more accurate power settings but what I got was a more comfortable
airplane. These tachs display RPM to the single digit. I found that by ear with
the old mechanical tachs I could sync the props to only about 10 to 20 RPM
accuracy. On the first flight with both the new and old tachs still installed I
was delighted to find a significant reduction in vibration and perceived sound
level when, after syncing the props by the mechanical tachs I then eliminated the
approximate 13 RPM difference that remained by referring to the new digital
tachs. What an improvement!
I strongly urge owners of twin engine aircraft
to explore the installation of these units in your aircraft. Cost is $900 for two
including all necessary installation accessories. They are STC'd for all aircraft
and since they wire to the P leads at the ignition switch the installation time
is minimal. In addition to their accuracy they also will record the maximum RPM
achieved by each engine on takeoff for later display, you can then adjust your
throttle levers to sync the engines exactly at full forward setting on takeoff.
They also automatically calculate and display the RPM drop for each mag during
run-up. I'm not affiliated with the company. I was just so pleased with the
product that I wanted to pass it along. You can contact them at 1-800-541-8128 in
Fullerton California. Ask for Ron. He is infinitely knowledgeable about the product
and general aviation applications.
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