Quick Answer

If your AeroTech G12ST-P DMS motor fails to ignite, first check the battery voltage and igniter wire contact with the propellant. Then verify the motor assembly is fully seated and the nozzle is clear.

Why the G12ST-P Is Different

The G12ST-P is a plugged/smoke motor, meaning it has no ejection charge. This design requires an external recovery deployment system (timer, altimeter, or radio). Ignition issues often stem from the same assembly and electrical factors as other DMS motors, but the lack of ejection charge means you must also ensure your recovery system is armed separately.

Because the motor is single-use and assembled by the user, the quality of the igniter installation directly affects reliability. A loose or misaligned igniter is the most common cause of no ignition.

Battery and Igniter Contact

A weak or undercharged battery is a frequent culprit. The G12ST-P requires a 12V launch system battery; a 9V battery often lacks the current to heat the igniter sufficiently. Always test the battery under load before the flight.

The igniter wire must be pressed firmly against the propellant grain. If the wire is bent, broken, or only touching the nozzle, the motor will not ignite. Insert the igniter all the way until it contacts the propellant, then secure it with the provided plug or tape.

Assembly and Nozzle Check

The AeroTech DMS motor uses disposable components; the nozzle and propellant are pre-installed. However, the user must ensure the motor tube is fully seated and the forward closure is tight. A loose assembly can shift the igniter or allow gas leakage.

Inspect the nozzle opening for debris or obstructions. Even a small piece of tape or dirt can block the igniter flame from reaching the propellant. Use a flashlight to confirm the passage is clear.

Diagnosis Steps

  • Symptom: No ignition sound or flame after launch command.
  • Likely Cause: Weak or dead battery, poor igniter contact, or obstructed nozzle.
  • Corrective Action 1: Measure battery voltage under load (minimum 12V). Replace if below 11.5V. If battery is good, proceed to next step.
  • Corrective Action 2: Remove the igniter and inspect the wire. Reinsert until it contacts the propellant grain. Secure with the supplied plug or tape. If igniter is damaged, replace it before attempting again.
  • Corrective Action 3: Check the nozzle for debris. Use a flashlight to confirm the passage is clear.
  • Stop / Alternative: If all checks pass and the motor still fails, the motor may be defective. Do not attempt to disassemble a live DMS motor. Return or exchange the kit according to your retailer's policy. Never force ignition or modify a single-use motor.

Product Facts

  • AeroTech G12ST-P 29mm x 147mm Single Use DMS 1-Motor Kit - 071200: The AeroTech G12ST-P is a Plugged/Smoke motor. Plugged reload kits do not utilize a motor-actuated ejection charge. Plugged motors must be used in conjunction with a timer, altimeter or radio-activated recovery system. If your ignition fails, verify that your recovery system is powered and armed independently—do not expect the motor to deploy a parachute.

    AeroTech G12ST-P 29mm x 147mm Single Use DMS 1-Motor Kit - 071200

    AeroTech G12ST-P 29mm x 147mm Single Use DMS 1-Motor Kit - 071200