Have a 85094 Hobbs meter. Supposed to wire it to the ignition (keyed). Diagram does not specify which terminal of the ignition to connect to.
Any help is appreciated.
If your using a key mag/on off switch, there will be a "B" or battery connection which gets power when you turn the master on. You can run a wire from there or from the main buss. The other wire goes to the pressure switch usually on the firewall, all the switch does is ground the hobbs when there is a couple of pounds of oil pressure. Because of the high failure rate of an expensive switch, I prefer to have 2 toggle switches for the mags, put a lock on the canopy and you can get a throttle lock if you prefer.
Just asking, but why do homebuilders install a Hobbs? I wasn't planning on it since I haven't seen a need for on, but since a number of people do install them, I was just wondering why.
Just asking, but why do homebuilders install a Hobbs? I wasn't planning on it since I haven't seen a need for on, but since a number of people do install them, I was just wondering why.
...it's usually a built-in function on EFIS/EMS units.
I don't know how the EFIS counts but the VM1000 only tracks time over 1500 RPM. I currently have around 250 hours on my -8 and the VM1000 only shows around 180 hours. That's a big reason why I installed a hobbs.
Also, the VM1000 only displays engine time prior to engine start-up. I don't know of a way to look at it in flight. I usually use the hobbs to track how long my local flight has been. Just glance over at it.
Karl