Question about flaps on landing.

[froger]

Landing!? well thats just crazy talk! 

 

[usvi]

Always found it fairly easy to do in the A6M but that's just me.

Does it put out the fire?

[Shuffler]

When I require a short landing in my 38 I slow and drop flaps all the way down. I'll pull nose up till stall buzzer is going absolutely crazy right before touch down. Then I leave flaps down for more drag.  To even further reduce my roll out I will woggle slightly left and right, with brakes on, using rudder.

The woggle is used on RC planes to slow down as most of them have no brakes.

[hitech]

Short answer, yes weight on wheels will create more braking force.


Long Answer

double simgCalcWheelDragForce(simgSUSPENSION * Suspension,double DownForce,int SurfaceType)
{
double SlipDragCOF;
double RollingDragCOF;
double Drag;
simgWHEEL * Wheel;
Wheel = &Suspension->Wheel;
SlipDragCOF = sin(fabs(Wheel->ForceAOA));
if(SurfaceType == simgST_WATER)// || SurfaceType == simgST_BEACH)
{
RollingDragCOF = 2.0;
}
else
{
RollingDragCOF = (Wheel->BrakePercentage * Wheel->MaxBreakCOF) +
  (Wheel->RollingFrictionCOF );
}

Drag = (RollingDragCOF + SlipDragCOF) * DownForce;
return Drag;
}

[CAP1]

When I require a short landing in my 38 I slow and drop flaps all the way down. I'll pull nose up till stall buzzer is going absolutely crazy right before touch down. Then I leave flaps down for more drag.  To even further reduce my roll out I will woggle slightly left and right, with brakes on, using rudder.

The woggle is used on RC planes to slow down as most of them have no brakes.

that's why i like having a grass runway at our r/c club. even my 80" p51 is stopped well under 1/2 way on the runway.......our runway is in the ballpark of 500ft.

[allaire]

To mimimize stopping distance, leave gear up. 

Yep, great for landing short under fire with a vulcher diving in on you.


ack-ack

I've done the belly slide from vulchers into the hanger where you choose you plane to survive.

[uptown]

Long Answer

double simgCalcWheelDragForce(simgSUSPENSION * Suspension,double DownForce,int SurfaceType)
{
double SlipDragCOF;
double RollingDragCOF;
double Drag;
simgWHEEL * Wheel;
Wheel = &Suspension->Wheel;
SlipDragCOF = sin(fabs(Wheel->ForceAOA));
if(SurfaceType == simgST_WATER)// || SurfaceType == simgST_BEACH)
{
RollingDragCOF = 2.0;
}
else
{
RollingDragCOF = (Wheel->BrakePercentage * Wheel->MaxBreakCOF) +
  (Wheel->RollingFrictionCOF );
}

Drag = (RollingDragCOF + SlipDragCOF) * DownForce;
return Drag;
}

Yeah that's what I was going to say

[Dragon]

Yeah that's what I was going to say

I didn't think The Amish were allowed to learn or read COAD. 

[trigger2]

Short answer, yes weight on wheels will create more braking force.


Long Answer

double simgCalcWheelDragForce(simgSUSPENSION * Suspension,double DownForce,int SurfaceType)
{
double SlipDragCOF;
double RollingDragCOF;
double Drag;
simgWHEEL * Wheel;
Wheel = &Suspension->Wheel;
SlipDragCOF = sin(fabs(Wheel->ForceAOA));
if(SurfaceType == simgST_WATER)// || SurfaceType == simgST_BEACH)
{
RollingDragCOF = 2.0;
}
else
{
RollingDragCOF = (Wheel->BrakePercentage * Wheel->MaxBreakCOF) +
  (Wheel->RollingFrictionCOF );
}

Drag = (RollingDragCOF + SlipDragCOF) * DownForce;
return Drag;
}

Thanks!
Code looks like C#. Except it looks like a variable was declared (int SurfaceType) when you started your loop... o.O

[StokesAk]

I like to go nose down onto the BH and scrape off it then crash onto the pavement But thats just me.

[Hopper]

Short answer, yes weight on wheels will create more braking force.


Long Answer

double simgCalcWheelDragForce(simgSUSPENSION * Suspension,double DownForce,int SurfaceType)
{
double SlipDragCOF;
double RollingDragCOF;
double Drag;
simgWHEEL * Wheel;
Wheel = &Suspension->Wheel;
SlipDragCOF = sin(fabs(Wheel->ForceAOA));
if(SurfaceType == simgST_WATER)// || SurfaceType == simgST_BEACH)
{
RollingDragCOF = 2.0;
}
else
{
RollingDragCOF = (Wheel->BrakePercentage * Wheel->MaxBreakCOF) +
  (Wheel->RollingFrictionCOF );
}

Drag = (RollingDragCOF + SlipDragCOF) * DownForce;
return Drag;
}

What is this hieroglyphics!

[Sunka]

I do this often on CV'S to stop my p51 faster.

To mimimize stopping distance, leave gear up. 

[SlapShot]

I never use flaps ... nor gear for that matter ...

[KayBayRay]

I find that in birds that have multiple notches of flaps that 2 notches down with engine cut gliding on final works well on my approach. I stick to a standard glide path on descent working to be just barely above stall speed as I am nearing the end of the runway (stall alarm should be sounding intermittentantly). For most birds I drop my gear as I am nearing the end of the runway and standard flare before contact. This further reduces my air/ground speed. Usually stop rolling within a few seconds of touchdown regardless of the bird.

As opposed to RL landings where I like to have a bit higher velocity to deal with shear and runway anomalies. Not all runways are Flat and Level I like to have some control and options. Plus a "Hard" landing in RL costs $$.

Later,
KayBay

[RTHolmes]

I usually pull them up when wheels down to stop the aircraft lifting again when I pull back to lock the tailwheel. some aircraft just cant wait to get airbourne again

been wondering about the suspension class, it seems like the 190 suspension has hardly any damping at all - did they really bounce that badly on hardened rws IRL?