When using an accelerometer-based altimeter in a rocket that may exceed Mach 1, what must be done?

When using an accelerometer-based altimeter in a rocket that may exceed Mach 1, it is important to understand the functionality of these devices and the environmental conditions they operate under. Accelerometer-based altimeters can measure vertical acceleration and integrate that data to determine altitude. They are designed to function based on changes in acceleration rather than atmospheric pressure, which might be affected by compressibility at transonic and supersonic speeds.

The correct approach does not require a Mach delay or access holes, as both of these measures would not provide real benefits for the accurate functioning of the altimeter under these conditions. A Mach delay specifically designed to prevent the rapid deployment of recovery systems might imply the altimeter is responding inaccurately at high speeds; however, accelerometers can continue to provide reliable readings beyond the speed of sound as they do not rely on air pressure changes.

Furthermore, drilling access holes in the electronics bay is unnecessary for an accelerometer-based altimeter, as this type of sensor does not need atmospheric pressure to function accurately. Therefore, implementation of either proposed action is unnecessary for the proper operation of the altimeter in the conditions outlined.

In summary, using an accelerometer-based altimeter does not inherently require adjustments like a Mach delay or access holes, indicating both