Beeping Numerical Reporting
Works Up To 100,000 feet!
MachLock feature for Supersonic Flights
Hook-up For External On/Off switch
Built-in battery voltmeter
Mounting holes for increased mounting flexibility
Launch Detect Altitude set to 100 feet
Power loss detection
|How Does This Payload Work?|
The PerfectFlite APRA payload works by sensing and remembering the the altitude and interpreting the velocity of the rocket. It remembers the altitude as such that at the end of the flight, it will know both your peak altitude and speed.
|How does it detect a launch?|
While the unit is in stand-by mode, it is constantly monitoring the outside air pressure. As soon as the air pressure starts to drop, it figures something is happening. It starts recording information, but will discard it until it senses a pressure difference that equals 160 feet in altitude gain. If the pressure drops this amount, it considers a "true launch," so it stores all the information it has recorded.
|How Do Altimeters Work?|
The barometric altimeter measures the air pressure surrounding the rocket. Air pressure near the ground is greater than air pressure high in the air (remember, air pressure decreases with altitude, until you reach the vacuum of space, where there is no air pressure). What the unit does is to compare the pressure it senses during flight, to the air pressure on the ground. Using a simple formula, it automatically computes the altitude difference that caused the change in pressure.
|How Altimeters Work - A Tutorial
How accurate are altimeters? Which is the best one? These are common questions that are hard to answer, because of the randomness of the atmosphere. This video explains what that means and how it relates to the accuracy of electronic altimeters.
|Frequently Asked Questions about the PerfectFlite APRA Payload:|
Q. Does it matter what elevation the launch field is?
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