So the safe IAS for a slip is a documented number, not merely seat of pants. I am impressed! :ok:

We all know a side slip is required any time you use the side slip to land so the actual added speed is dependant on how much side slip you use. Sometimes you use a little, sometimes a lot, so adjust for conditions on short final. Don't get any charts out just land and use your eyeballs. Always worked for me. Flying isn't that hard if you keep it simple.

Simple situations can be made hard by making it complicated as we are here.

Well, bubbers44, that's what I sorta expected.

Almost.

In my T-craft, runway length is hardly a problem, but obstacle clearance at local fields can be a challenge. So I slip with the nose well down to kill some L/D - I couldn't tell you my IAS if I had to, my eyeballs are outside the plane. Gotta do it that way, got no RA, and I un-slip it at about 10 feet.

Many years ago my dad test-flew a rebuilt J-3 for a friend. After a half-hour airwork, he came back and landed first time using no more than 500 feet of runway. Although he had plenty of prior J-3 time, that had been 20 years earlier.

But thanks for the "big iron" perspective. :)

Hi barit1,
He could "push the beast's" rudder until he was about to run out of aileron control, which is easy to feel in a Boeing through the control wheel displacement.

If he were trying to do the same thing in an Airbus FBW - then he'd have to be looking at the Flight Control System Page to see how much aileron was being applied for him.

I flew the T craft and taught my FAA medical examiner how to fly in it and when I got really bored one day found I had flown over 75 types of aircraft going through my log book including experimental biplanes which I certified for aerobatics for the FAA. I was lucky when aviation was not so restrictive we could do this. My FAA friend had a one of a kind mini biplane that was a blast but the only one built on some pilots garage with drawings on the floor. It was called the Bailey Bitty Bipe.

Doing slips in any airplane is easy, just push rudder one way and aileron the other. You can call it a forward slip or a side slip depending what you are using it for. We learned to do it before solo 50 years ago.

It still works today. I feel sorry for the new guys who are taught automation and didn't get to experience what I did.

Well....
 

A skid will kill you; a slip will save your life....

Profound words.


Fly safe,


PantLoad

With reference to Superpilots diagrams..

For a correct turn with no loss of height..

Vertically..

mg = LCos(x)

Where

m=mass of aircraft
g = gravity
L = Lift
x = bank angle

Solve for L
L = mg/Cos(x) ...................... (1)

Horizontally..

mv^2/r = LSin(x)

where
v = velocity
r = radius of turn

Solve for L
L = mv^2/rSin(x) ......................(2)

Equate (1) and (2)

mg/Cos(x) = mv^2/rSin(x)

Mass cancels

rearrange

Sin(x)/Cos(x) = v^2/rg

Sin(x)/Cos(x) = Tan(x)

so I think in a normal turn

Tan(x) = v^2/rg

If Tan(x) > v^2/rg then it's a slip
If Tan(x) < v^2/rg then it's a skid

Someone check the maths :-)

Impeccable maths. But where do you get r = radius of turn? You can get it from:

V = ω * r
where ω = turn rate. With that, you get:

Tan(x) = v * ω /g

Makes sense.