Brian Whatcott wrote:


When I point it at this screen (Free Agent News Reader) it registers
1800 rpm i.e 60 flashes / sec if I select two blade, or
1200 rpm if I select 3 blade. If I point it at a compact fluorescent,
it indicates 3600 rpm (120 flashes/sec)


What rpm should I expect if I'm using MS Outlook as a newsreader?:-))

Seriously, I've seen several folks using the hobby store tachs at the
airport. As far as I know, they don't require any patches to be stuck to the
prop. The big upside is that they cost about 10% of what specialized
aircraft optical tachs (Prop Tach, TruTach) cost. As with most things, if
it's for an airplane, multiply the normal price by about 10.

John Galban=====N4BQ (PA28-180)

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