The slot gap is a feature of some aircraft wings that allow air to flow from the underside of the wing's leading edge into the air moving over the top of the wing. This higher-pressure air can oppose suction and help keep the wing attached to the surface longer, increasing the wing's lift at high angles of attack. The resulting increased performance can be as much as 40%.

For this to work, the wing needs to be shaped properly, with its leading-edge slot ideally placed to maximize its effect. However, there are many factors that can affect the effectiveness of a slot gap. This includes the location of the gap, its size, its shape and other features of the wing. Daftar Fomototo

There are also a number of methods for measuring the gap width. These include capacitive sensors, optical systems, CCD camera-based systems and micro-probing systems. However, none of these systems can achieve the required sub-micrometer uncertainty for the measurement of a slot gap [1].

A new technique is proposed that uses a shear mode vibrating probe to measure the interaction force between the water layer and the measuring surface. It is found that this method can reduce the measurement uncertainty by a factor of more than 10 to the same degree as traditional probe-based methods.

Historically, most machinists have used a feeler gauge to measure the gap on a slotted part. However, this is often inaccurate and time consuming. A more accurate and reliable approach is to use an adjustable parallel of the proper size. This can be made from a lever type DTI fixed to some sort of guide bar, with one of the indicator probes tracking opposite sides of the guide. This will give you a quick and easy way to get an accurate gap measurement.

The slot die lip gap is a critical parameter that impacts coating performance. The gap is the smallest dimension of the slot die, and its change has a proportionally larger impact on the coating performance than any other dimension. This is why it is important to understand how to minimize the gap and use the proper shim thicknesses to do so. To do this, it is useful to break down the dimensional parameters that control the gap into linear and cubic variables. Linear variables tend to affect coating performance by a small amount, but the cubic variables are more significant. This is why it is important to measure the gap using a system with a high degree of accuracy.