0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Is a datum reference used with roundness tolerancing?
no
What does MMLW mean in reference to a tidal datum?
Perhaps you mean MLLW? If so, it is the Mean Lower Low Water; a reference point for all other measurements of Datum.
What is the definition for datum dimension?
A dimension that exactly locates a reference point, reference line, or reference plane
What is datum in land survey?
A datum in land surveying is a known point or elevation used as a reference when measuring and mapping the land. It serves as the basis for establishing the positions of other points, helping to ensure accuracy and consistency in surveying work. Common datums include the North American Datum (NAD) and the World Geodetic System (WGS).
What is Land Surface Datum?
Land-surface datum is a datum plane that is approximately at land surface at each well. If known, the elevation of the land-surface datum above sea level is given... Datum: any level surface, line, or point used as a reference in measuring elevations.
What is datum reference line in aircraft?
Datum is an imaginary vertical plane from which all horizontal measurements are taken with the aircraft in a level flight attitude.
Why doesn't the a10 fuselage station start at 0?
Fuselage stations are normally referenced from a reference datum which some distance forward of the first fuselage component. The reference datum normally relates to a precisely defined point on the manufacturers jig. Nominating a datum forward of the first airframe component allows for some flexibility in any redesign of the nose. Also the reference datum has to be off the airframe because the dimensions of the airframe itself will vary with temperature - unlike the jig on which it is made
What is the bench mark?
It is a fixed reference point whose elevation above a given datum line
Why do archaeologists use a datum point rather than simply measuring from the ground surface?
Archaeologists use a datum point to establish a consistent reference point for all measurements during excavations. This helps ensure accuracy and precision in recording the vertical and horizontal positions of artifacts and features. By having a fixed point of reference, archaeologists can maintain spatial relationships within the site.
How are fuselage station numbers measured?
Fuselage station numbers are measured based upon distance, in inches, from the Reference Datum.
How do you select and establish a suitable datum?
Selecting and establishing a suitable Datum is critical, ensure your datum is at a fixed point. Normally a hole/slot. Holes and slots a normally lasor cut, ensuring they are at an extremely high tolorance already. Then reference the slot or hole to another near by slot or hole. Using these selected points will give you accruate points of measurement/datum.
How is the reference datum point on aircraft determined?
It is entirely up to the manufacturer of the aircraft. Usually it is an imaginary point forward of the nose of the aircraft and all points aft of that datum have a positive value. This makes weight and balance calculations easier as there are no negative numbers.
