Lear45 approach speed and configuration

[Clear-&aMillion]

Hi,

I'm playing around with some flight simulation software, and want to practice landing the Lear45. Generally, about what airspeed is good for the approach to landing? Also, is full or partial flaps typically used? Under what condiitions should the speed-brake be used?

Thanks for any information

 

[jetjockey1231]

clear and amillion - for what you are doing just use vref 116kts and vapp 125kts. use full flaps(40 deg) for landing and flaps 8 for takeoff. spoiler should not be used wwhile flaps are extended. hope this helps - have fun

 

[Clear-&aMillion]

Thanks JetJockey.

 

[SCT]

JJ,

I've heard that before about the SB/ flaps on the Lears. Is it an areodynamic or hydraulic system problem not to use the SBs w/ flaps?

 

[sydeseet]

Aerodynamic. Very little functioning wing left with the flaps full down and the spoilers deployed. Picture a falling brick with a JATO unit strapped to the top.

There are many airplanes with this limitation for similar reasons.

 

[CRAZY LEGS]

Aerodynamic. Very little functioning wing left with the flaps full down and the spoilers deployed. Picture a falling brick with a JATO unit strapped to the top.


The no spoilers with flaps on the 45 was grandfathered in from earlier lears. While prohibited by the AFM, there is no aerodynamic reason for it.

 

[laser]

CrazyLegs,
Hadn't

 

[laser]

CrazyLegs,
Hadn't heard that before

 

[laser]

CrazyLegs,
Hadn't heard that before (or my brain

 

[laser]

CrazyLegs,
Hadn't heard that before (or my brain archived the info

 

[laser]

CrazyLegs,
Hadn't heard that before (or my brain archived the info and I can't find it).

 

[laser]

Who the heck's punching my Enter button?

JEEZ,
How the heck did that happen? Let me have another crack at it.

CrazyLegs, Where'd you get that info about the spoilers on the 45? Who told you there was no aerodynamic reason for the limitation?

 

[Sgt. Hartman]

There are many airplanes with this limitation for similar reasons.

I don't know what the limitation says on the 45 but on the 35 you can't extend spoilers with flaps while airborne. There is nothing that says that you can't use them on the ground for landing.

From what I have heard, another reason why this limitation is in place is due to the turbulent flow that occurs just aft of the spoiler. When the spoilers are extended with the flaps at in-flight speeds, the turbulent flow across the back of the flap can cause the skin on the back side of the flap to wrinkle.

 

[cyork25]

in school they tell you not to because the decent rate/amount of drag is too great.. I've heard of a guy who put them out and forgot about them and landed fine, just said that he was using alot of power(I believe some early ones didn't have a light for the spoilers). anyway,

I've also heard if you use the spoilers with the flaps in the lears your girlfriend will get pregnant and the left wing will fall off.

 

[Sgt. Hartman]

I've also heard if you use the spoilers with the flaps in the lears your girlfriend will get pregnant and the left wing will fall off.

What are you saying??? WTF is wrong with you??? It's the right wing damnit...The right wing will fall off!!!

 

[cyork25]

sorry, i was talking about the left wing when looking from the front. lol.