Rotax 912ul Runup RPM

[dholly 718]

Manual says:

Run up @ 4000 RPM

Ignition check - 300 RPM drop max each circuit

120 RPM max difference between A&B circuits

- 4000 RPM just seems unnecessarily high to me, what do you use?

- At 4000 RPM I see a bit more than 300 RPM drop on each ignition, how about you?

- My Rotax tach appears to be way off, what RPM difference do you see on your Rotax tach vs. TinyTach?

[Guest]

Manual says:

Run up @ 4000 RPM

Ignition check - 300 RPM drop max each circuit

120 RPM max difference between A&B circuits

- 4000 RPM just seems unnecessarily high to me, what do you use?

- At 4000 RPM I see a bit more than 300 RPM drop on each ignition, how about you?

- My Rotax tach appears to be way off, what RPM difference do you see on your Rotax tach vs. TinyTach?

I'll let you know.....in about 2 months. Still running into things I need to correct before I can fly my new (to me) Flat Avid.

ChrisB

[Av8r3400 1179]

I use 3800. No science, just the number I was told.

[dholly 718]

Really Chris? Your "FLAT Avid"... I guess we have two in the Club, lol! Best chuckle I've had all day, thanks.

Larry - do you have a TinyTach?

[Av8r3400 1179]

Larry - do you have a TinyTach?

I have access to one and have been meaning to get it to verify my analog tach.