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Line 72: − + + − Here is the spec sheet for this motor[http://www.aerotech-rocketry.com/uploads/4e952284-bb4b-4943-8904-9a0719e8ee3a_AT%20H550ST%20SU%20jun%2019.pdf]. Interestingly enough, SSI will be using this motor for its L1 certifications.+ − Using this motor as an example, we know that this motor is classified in the range of impulse from 160 Ns - 320 Ns. The 550 denotes that the motor's average thrust is 550 N. The ST denotes what type of propellant is in the casing. In this case, ST stands for "Super Thunder". Aerotech has cute names for their different types of propellants. They often only denote the color of the flame. Finally, the 14 denotes that the motor will fire its ejection charge 14 s after burnout unless it is adjusted, as indicated by the A. Motor delay times can be adjusted with a motor delay tool (otherwise known as a proprietary screwdriver, here is a link to buy one[http://www.buyrocketmotors.com/aerotech-universal-delay-drilling-tool-for-dms-motors/]).+ + + + + +
→Aerotech H550ST-14A
[[File:L1_Guide_Motor_Classification.png|300px|thumb|frame|center|Letter designations increase total impulse exponentially]]
[[File:L1_Guide_Motor_Classification.png|300px|thumb|frame|center|Letter designations increase total impulse exponentially]]
=== Aerotech H550ST-14A ===
===Motor Designation Breakdown===
To better understand how to read a motor label lets take an example:
'''Aerotech H550ST-14A'''
Here is the spec sheet for this motor[http://www.aerotech-rocketry.com/uploads/4e952284-bb4b-4943-8904-9a0719e8ee3a_AT%20H550ST%20SU%20jun%2019.pdf]. This is the motor that SSI uses for its L1 certification launches.
*'''H''': the letter designating the impulse range. For an H this is from 160 Ns - 320 Ns.
*'''550''': denotes that the motor's average thrust is 550 N.
*'''ST''': denotes what type of propellant is in the casing. In this case, ST stands for "Super Thunder". Aerotech has various names for their different types of propellants, however, often these names are only denoting the color of the flame rather than the chemical compounds that it is made of.
*'''14''': denotes that the motor will fire its ejection charge 14 s after burnout unless it is adjusted, as indicated by the A. Motor delay times can be adjusted with a motor delay tool (otherwise known as a proprietary screwdriver, here is a link to buy one[http://www.buyrocketmotors.com/aerotech-universal-delay-drilling-tool-for-dms-motors/]).
== Recovery ==
== Recovery ==