High Density Altitude Takeoff -- Rotate?

[TGreen]

Took off twice in the past week from Albuquerque at pretty high density altitude and it seems like the pitch for Vy (and maybe even for Vx) at, say, 8,500 feet is lower than the pitch of the aircraft rolling down the runway. Is this right? If so, should I even be rotating at all? Or should I just be waiting for it to fly off and then pitch down a bit (which feels really weird so close to the ground) to accelerate to Vy?

[carusoam]

Definitely a long body question...?

Where the LB has about 2X the ground attitude as the other Mooneys... 

The T/O mark range on the trim is pretty close to trim required for climb at Vy...

As long as you are using the T/O flaps...  

Knowing your WnB will also be helpful...as the B can vary...

 

The challenge you run into if you allow the plane to fly off the runway....

For the plane to break ground initially requires a few pounds of back pressure... that needs to be released to settle into the climb...

 

A quick review of the T/O procedure in the POH May give more details...

Did you Need to trim down for the climb?
 

Did you get a stall warning to go with that?

If I set the trim a little outside the range... it is pretty easy to get a stall alert.

PP thoughts only, Not a CFI...

Best regards,

-a-

 

[TGreen]

  On 8/25/2020 at 12:25 AM, carusoam said:

 

Did you Need to trim down for the climb?
 

Did you get a stall warning to go with that?

 

Expand  

Yes, and yes.

[Duane Baker]

Always a little back pressure and wait for it to fly, there is no official ROTATE speed for light GA aircraft. ATP, CFI

[skykrawler]

Vx goes up and Vy  goes down as altitude goes up.    What is the pitch angle of your airplane on the ground.   Squished main pucks can make it squat.  How long did you leave the flaps out?