Low and slow power settings for M20J

[bd32322]

What are your low and slow power settings for loitering in the sky. I am interested in the m20j settings, but would be interested in hearing others as well.

[aaronk25]

4.6gph and I think 20" manifold way lean of peak 2000 rpm. 100kts or so

[Hank]

The slowest in my C book is 20"/1950, but I don't like how that feels, so I generally run 2300 and use throttle to control speed. Just be aware of your placarded restrictions . . . .

[The-sky-captain]

Try 19 squared. It gives me around 5 gph but like Hank said it feels a little weird.

[jetdriven]

I use 15" , 2050 RPM and peak EGT. You can maintain 90 knots indicated at this power setting at 3.9 GPH and if you are ligh and get your EGT dead on, 3.4 GPH.

That's right, 18 hours endurance plus reserve in a stock M20j with 64 gallons

CHTs are 250 BTW.

[rbridges]

The slowest in my C book is 20"/1950, but I don't like how that feels, so I generally run 2300 and use throttle to control speed. Just be aware of your placarded restrictions . . . .

 

I was going to ask about your restrictions.  I think mine is 2350.

[rbridges]

I use 15" , 2050 RPM and peak EGT. You can maintain 90 knots indicated at this power setting at 3.9 GPH and if you are ligh and get your EGT dead on, 3.4 GPH.

That's right, 18 hours endurance plus reserve in a stock M20j with 64 gallons

CHTs are 250 BTW.

 

haha.  take that Cessna 150's and 152's.

[jetdriven]

Hah, it's "take that Rotax, VW, and corvair"

[fantom]

There is something REALLY wrong with this topic

[Marauder]

There is something REALLY wrong with this topic

It's called an oxymoron! I agree! Sent from my iPad using Tapatalk

[Marauder]

I use 15" , 2050 RPM and peak EGT. You can maintain 90 knots indicated at this power setting at 3.9 GPH and if you are ligh and get your EGT dead on, 3.4 GPH. That's right, 18 hours endurance plus reserve in a stock M20j with 64 gallons CHTs are 250 BTW. haha. take that Cessna 150's and 152's.

Heck that speed would have taken the 172 I rented after I got my PPL. Of course, I had my rather rotund sister in law on board. Plane must of have been out of rig, wanted to constantly bank right... Sent from my iPad using Tapatalk

[nels]

I use 15" , 2050 RPM and peak EGT. You can maintain 90 knots indicated at this power setting at 3.9 GPH and if you are ligh and get your EGT dead on, 3.4 GPH.

That's right, 18 hours endurance plus reserve in a stock M20j with 64 gallons

CHTs are 250 BTW.

That figures to over 30 mpg!!! Are you sure that's right? I'm hoping so, it would sure help justify keeping a plane around for pleasure flying even if it wasn't used that way too often.

[jetdriven]

That figures to over 30 mpg!!! Are you sure that's right? I'm hoping so, it would sure help justify keeping a plane around for pleasure flying even if it wasn't used that way too often.

 

~26 NMPG

[Hank]

Heck that speed would have taken the 172 I rented after I got my PPL. Of course, I had my rather rotund sister in law on board. Plane must of have been out of rig, wanted to constantly bank right... Sent from my iPad using Tapatalk

 

 My C will take most 172's for time and fuel burn. WV to the beach, I run 2½ hours vs. 3+, on 10% less fuel. 

[georgeb]

haha, I like to read the reaction of some of the Mooney flyers that have never flown slow......I frequently do as sky captain at 19 squared. I have a buddy that goes flying with me on his luscomb....I'll hand prop him and let him get started..catch up to him and 19 squared plus a little weaving keeps me within range of him.....Low n slow....about 4.5 5 gph.....90-110 knots....Its great...try it sometimes.

[PTK]

This thread is a perfect example of why having too much time on one's hands is considered a bad thing!! The mind wanders and becomes corrupt!

[jetdriven]

Whats with this "Squared" stuff?

[N201MKTurbo]

I once played around with slow flight in my F. It was when I was young and foolish. I was based in Denver at 01V and the wind was blowing like crazy. I wanted to get my DME speed to zero flying toward the Denver VOR. I don't remember the power settings, but I flew for quite a while with the needle 1/2 a needles width above stall. I even landed at that air speed, which I later determined was real stupid. BTW The ground roll was about 5 feet.

So I started experimenting with the plane by gently stalling it from that speed, and a strange thing happened. If I stalled very gently and then just increased the power a little the plane became perfectly controllable while descending at 2500 FPM. I was able to repeat it three times, once doing a 90 degree standard rate turn. When I would push the nose over to recover, the airspeed would go almost to the red line.

I found a NASA article about something called a deep stall, that decribed the situation, but they were using specially modified sail planes to do the study. Well I can tell you a Mooney will do it without being modified.

[bd32322]

I once played around with slow flight in my F. It was when I was young and foolish. I was based in Denver at 01V and the wind was blowing like crazy. I wanted to get my DME speed to zero flying toward the Denver VOR. I don't remember the power settings, but I flew for quite a while with the needle 1/2 a needles width above stall. I even landed at that air speed, which I later determined was real stupid. BTW The ground roll was about 5 feet.

So I started experimenting with the plane by gently stalling it from that speed, and a strange thing happened. If I stalled very gently and then just increased the power a little the plane became perfectly controllable while descending at 2500 FPM. I was able to repeat it three times, once doing a 90 degree standard rate turn. When I would push the nose over to recover, the airspeed would go almost to the red line.

I found a NASA article about something called a deep stall, that decribed the situation, but they were using specially modified sail planes to do the study. Well I can tell you a Mooney will do it without being modified.

LOL I definitely want to try the 0 ground speed thing in a mooney after I buy myself an oxygen bottle.

About the deep stall .. Did a similar thing with an arrow .. Held it in the stall with a bit of power and a lot of rudder (forget which left or right) .. About 1500 fpm ... Recovery was a very sharp nose drop, but airspeed didnt go close to red line, but it did increase a lot. Stupid thing to do in hindsight probably

[bd32322]

haha, I like to read the reaction of some of the Mooney flyers that have never flown slow......I frequently do as sky captain at 19 squared. I have a buddy that goes flying with me on his luscomb....I'll hand prop him and let him get started..catch up to him and 19 squared plus a little weaving keeps me within range of him.....Low n slow....about 4.5 5 gph.....90-110 knots....Its great...try it sometimes.

I actually cannot get to 1900 rpm smoothly. 2100 is the lowest "comfortable" rpm for me, but its still good enough for me (huge fuel savings for loitering around). Tried all your low power settings today. Bumpy and low overcast in the northeast today, so wanted to go slow anyway and smoothen the ride.

[Hank]

What do you use on Approach between IAF & FAF? That would make a good starting place, adjust throttle for desired results within approved RPM range.

[bd32322]

What do you use on Approach between IAF & FAF? That would make a good starting place, adjust throttle for desired results within approved RPM range.

18 MP and 2400 rpm

When i lower the gear at this power setting it gets my speed within flap extension range.