IFR approach power settings

[sabwjz]

What power settings do people use for IFR approaches (RPM/MP).  I've got a '68G and I haven't completely got the power settings dialed in yet.

Thanks!

[The-sky-captain]

I shoot for 17 mp which gives me about a 500' per minute descent. I keep the prop at cruise setting until on final.

[eaglebkh]

For my E with to maintain 90kts, there's basically 3 different settings I use for different parts of the approach:

Level flight @ 90kts, gear up: 17/2400

Level flight @ 90kts, gear down: 20/2400

Once I've slowed down to 90kts, all descents are made with the gear down, 2500 rpm, and whatever MP to get the desired descent rate (500-1000fpm, no speed brakes).

[N207LS]

I also fly a 1968 G, however it has a Power Flow and several speed mods, so some of my numbers may be slightly different.  I spent about two hours playing with power settings (flying with a 4000 hour Mooney transition instructor) and then flew 5-6 ILS approaches to come up with my current technique.  Here are my power settings and performance numbers at various approach points...

When beginning to get vectors for an approach (15-20 miles out) 17" MP and 2500 RPM slows airplane to 125mph at level flight.  Remain at this setting until (for an ILS or GPS LPV or LNAV +V  approach) GS is 1 dot above being centered, drop gear, 2 pumps on the flaps, 15" MP and full prop, hands off, yields 100 MPH and the plane will fly the glideslope by itself (descending at ~ 400 fpm) using just slight rudder to keep centered on the localizer.  Upon reaching decision height (hopefully you see airport environment or obviously go missed) pump in remainder of the flaps (2 more pumps) and staying on the GS will yield 85 MPH. 

To descend at 500 fpm with gear/flaps up 13" and 2500 RPM at 125 MPH (a little annoying since gear warning will go off under 15" MP).

To go missed, 25 squared will give 750 fpm climb out. 

I basically fly at sea level (Florida) and these numbers have worked for me in countless approaches. 

Best of luck and I hope this helps.

Aaron

[sabwjz]

Thanks for the input.  I will have to give this a try this weekend.