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#1
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The tach is the instrument for measuring engine hours...
denny "O. Sami Saydjari" wrote in message ... OK, dumb question. For 100-hour inspections (or 50 hours until oil change), is this measured in Hobbs time or Tach time? -Sami N2057M, Piper Turbo Arrow III |
#2
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![]() "Dennis O'Connor" wrote in message ... The tach is the instrument for measuring engine hours... Not necessarily. The FAA just wants a consistent reasonably accurate way of recording time in service. Some aircraft, like late model Bonanza's (and now my Navion) don't even have a recording tach (no tach time at all). We use the elapsed time meter (hobbs). |
#3
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![]() "Ron Natalie" wrote in message m... Not necessarily. The FAA just wants a consistent reasonably accurate way of recording time in service. Some aircraft, like late model Bonanza's (and now my Navion) don't even have a recording tach (no tach time at all). We use the elapsed time meter (hobbs). What do you consider "late model Bonanza"? Every one I've looked at (from 1987 onward until they stopped making them in 1994 has one (at least in the F33A model). Guessing that Hobbs time is 25% higher than Tach time, I'd put a recording tach in if it didn't have one already. |
#4
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What do you consider "late model Bonanza"? Every one I've looked at (from
1987 onward until they stopped making them in 1994 has one (at least in the F33A model). How about a 2003 model A36? I service a 1998 A36 and it has no recording tach only a hobbs meter. All the engine instruments have been reduced to about 1.5" diameter dials, no room for a tach counter. John Dupre' |
#5
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![]() "JDupre5762" wrote in message ... What do you consider "late model Bonanza"? Every one I've looked at (from 1987 onward until they stopped making them in 1994 has one (at least in the F33A model). How about a 2003 model A36? I service a 1998 A36 and it has no recording tach only a hobbs meter. All the engine instruments have been reduced to about 1.5" diameter dials, no room for a tach counter. Yep, that's the ticket. My Navion now has the prop, engine, and engine instruments from a 2003 A36. Got it with 9 hours total (just enough time to get it from Kansas down to the conversion shop to put the turboprop on). My old tach wouldn't have worked anyhow. It was set up for the old Gopher-35 engine which cruises at 2800 RPM. The hours on the tach weren't the total time anyhow (not the original tach, had to add something like 4000 hours to the value). |
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