Thanks, Craig. It seems that the concerns of my A&P are well founded. There are a number of things to worry about when hooking up these beasts.
I have a restrictor value and a vacuum gauge. I hope that works. The vacuum regulators listed in Aircraft Spruce run from $200 to $1,000. I hope that I don't need one of them. If so, I would definately opt for removing the whole sheban and waiting until I can afford electrically driven gyros or the newer solid-state instruments. Thanks. Frank Nelson N51DV - 415C --- In [email protected], "nm0l" <[EMAIL PROTECTED]> wrote: > > When I purchased my 415-C years ago I found the attitude ind. inop. Taking it out to have > it repaired I discovered it hooked up backwards! A lot of the old military type instruments > were designed to run on air PRESSURE or VACUUM. The pressure port was marked "air > inlet" so apparently this is where some "installer" put the vacuum line. So therefore the > gyro was trying to run in reverse. Air Inlet is were the static air ENTERS! After reversing > the hoses the old gyro worked fine. But as pointed out you MUST have a regulator or else > the gyro(s) will not run at the proper speed. T&B only needs 2.5 inHg. if memory serves > me. Craig 9772M >
