Slipping along Bodies with Full Flaps

[mooneyflyer]

For years I thought one cannot slip a long body with full flaps. But somebody challenged they and now I can’t find anything on this.  Does anyone know about this? Could not find in my POH

[dzeleski]

15 minutes ago, mooneyflyer said:

For years I thought one cannot slip a long body with full flaps. But somebody challenged they and now I can’t find anything on this.  Does anyone know about this? Could not find in my POH

There are a few chats about this but this was a popular one.

 

This one is also good

 

Edited December 24, 2024 by dzeleski

[Brandt]

There is no restriction in the M20V POH. I have done so many times. No issue. 

[PT20J]

Good article in Mooney Flyer by Bob Kromer

https://themooneyflyer.com/issues/2019-AprTMF.pdf

[M20F-1968]

On 12/24/2024 at 6:22 PM, mooneyflyer said:

For years I thought one cannot slip a long body with full flaps. But somebody challenged they and now I can’t find anything on this.  Does anyone know about this? Could not find in my POH

Rather than slipping to loose altitude or slow down, put out the speed brakes.  I have speed brakes in my F (highly modified) and some of my best landings were done with full flaps and speed brakes.  The plane flies just as well, you need to carry more power, it feel heavier (since I believe wing loading is increased) but you use the same numbers.  Works well in a crosswind as it allows you to use more power.  I have done one go-around in this configuration as well, getting rid of the speed brakes first as there is no altitude loss in doing so.  

John Breda

 

[hubcap]

On 12/25/2024 at 10:26 AM, PT20J said:

Good article in Mooney Flyer by Bob Kromer

https://themooneyflyer.com/issues/2019-AprTMF.pdf

Bob has spoken about this issue at Mooney Max. I have followed his advice on the issue as I believe him.

[Danb]

7 hours ago, M20F-1968 said:

Rather than slipping to loose altitude or slow down, put out the speed brakes.  I have speed brakes in my F (highly modified) and some of my best landings were done with full flaps and speed brakes.  The plane flies just as well, you need to carry more power, it feel heavier (since I believe wing loading is increased) but you use the same numbers.  Works well in a crosswind as it allows you to use more power.  I have done one go-around in this configuration as well, getting rid of the speed brakes first as there is no altitude loss in doing so.  

John Breda

 

John I’ve never landed with speed brakes on there  disengaged after dropping landing gear, what do you do differently when landing with them on and what should be expected vs landing without

 

TY

D

[Brandt]

7 minutes ago, Danb said:

John I’ve never landed with speed brakes on there  disengaged after dropping landing gear, what do you do differently when landing with them on and what should be expected vs landing without

 

TY

D

Speed brakes have no impact on landing attitude or stall speed and they become less effective as you slow down to short final speeds so their impact on Sink rate become less as you slow. Landing with them extended is a non-event.

[M20F-1968]

On 12/26/2024 at 3:48 PM, Danb said:

John I’ve never landed with speed brakes on there  disengaged after dropping landing gear, what do you do differently when landing with them on and what should be expected vs landing without

 

TY

D

You do nothing differently.  Fly your approach by the same numbers you would otherwise.  You will need to carry more power to keep the same numbers (airspeed) and the plane feels heavier, but that is a good thing.  In a crosswind the plane is more stable given that you are carrying more power.  Some of my best landings have been when I extended speed brakes, forgot they were out, landed and realized they were still out on the ground.  My mechanic (high time very experienced Mooney person) does all (or nearly all) landings in the Ovations and Acclaims he flies with speed brakes out.  

On a go around the plane will climb but realize the configuration you are in and do not be aggressinve.  Keep the nose lower than you might without speed brakes out, retract the speed brakes as they are quick to retract, then raise gear, then flaps.  

John Breda