Rotation speed

[The-sky-captain]

Going from POH memory the rotation speed of my "J" is around 63 knots. For whatever reason my plane is never ready to fly until about 72 knots.  I've experimented with flap and trim settings but not much changes. All of the other V speeds are right where they need to be. Any imput?

[The-sky-captain]

OK, that's about where I leave the ground too. I can get it off the ground at around 63k but it just doesn't "feel right." Thanks for the input Jim.

[Parker_Woodruff]

Are yall talking fully loaded?

[fantom]

60 kts and light back pressure; liftoff, stay in ground effect for another few seconds; and off you go.

Check you gross weight, flap setting and POH. 72 kts. is, in my experience to fast, and can cause you to sit on your nose gear. Maybe an hour or two with a Mooney savvy CFI will help. In any event:

RTPOH

[RobertoTohme]

Gary,

On the "Emergecies" chapter of the POH you're reading in the picture, do you get a lot of "if unsuccessful, pull the eject handle"?  Just curious...

[fantom]

Quote: RobertoTohme

Gary,

On the "Emergecies" chapter of the POH you're reading in the picture, do you get a lot of "if unsuccessful, pull the eject handle"?  Just curious...

[TimBo]

62 ktas ~ 72 mph, M20C shows air speed in mph. I think you all are right

[TimBo]

63 kts = 72 mph, mooneys (M20C) show indicated airspeed in mph on the outside and kts on the inside of the gauge. Be sure you're reading the correct units 

[Andy95W]

Another post, raised from the dead nearly 12 years later.

Welcome, TimBo!

[MooneyMitch]

Do small planes really rotate?  Maybe I missed the Vr in my old POH. Or maybe I'm old and missed the Vr in my POH !

[Hank]

45 minutes ago, TimBo said:

63 kts = 72 mph, mooneys (M20C) show indicated airspeed in mph on the outside and kts on the inside of the gauge. Be sure you're reading the correct units 

My Owners Manual says to pull back on the yoke at 65-75 mph. So I generally pull back to 70 mph, 75 if I'm heavy or the wind is pretty gusty. It works for me and my C.

[FlyingDude]

Is your cg proper? Did it drift forward over the years as a result of mods and replacements? A forward cg plane rotates at a higher speed than an aft cg plane...

Edited January 29, 2021 by FlyingDude

[RobertGary1]

Yea when heavy you want more than 63. 

[carusoam]

Welcome aboard Timbo!

I think these guys are alright too...

@The-sky-captain Hasn’t been back since just after he sold Rocky...

 

To restart the old flame...

Did you use T/O flaps with those numbers?

 

My engine runs turbine smooth...

So I use a progressive method of rotating...

It happens so fast... I just skip to the flying check list...

 

Use caution with the soft field technique...

it is really easy to lift off easy as expected... but climbing out of ground affect without accelerating can be a bit funky...

 

PP thoughts only, not a CFI...

Best regards,

-a-

[Hank]

7 hours ago, carusoam said:

To restart the old flame...

Did you use T/O flaps with those numbers?

The spees that I pull back on the yoke to leave the ground doesn't change with flap usage (most often none), only with load and winds.

[MatthiasArnold]

Just looked up the T/O speed of some recent flights with my M20R O2 on CloudAhoy.
The T/O speeds are all in the range 62 .. 65kts (mostly depending on TOM and DA).

Best,
Matthias

[Releew]

I apply backpressure at ~65K.  From there, I let the plane fly itself off the runway. Obviously the trim needs to be set correctly.  With Three "Full Size" passengers and half tanks she breaks ground at 70-75K and quickly accelerates to 90K plus for initial climb.  I've used this method for every airplane flown.  Not a lot, but enough.

 

Rick