18 mm Motors

18 mm Motors

18mm wide by 70mm long, these motors are the most common of the model rocketry fleet.  They range in total impulse from 1/2A (0.626 Ns) to D (20 Ns), and can power small to mid size rockets to altitudes well over 1000 feet.  Be sure you review the Model Rocketry Safety Code to make sure your launch site is large enough for the motors you are flying.

  • 2 pack of A3-4 Motors This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Quest

    A3-4 18mm Motor

    MSRP: $7.99
    $6.79
    2 pack of Quests's Black Jack composite propellant 18mm A3-4 model rocket motor. 2 motors, plus igniters and igniter plugs per pack. Must ship ground only.
    045856061089
  • 2 pack of A3-6 Motors This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Quest

    A3-6 18mm Motor

    MSRP: $7.99
    $6.79
    2 pack of Quests's Black Jack composite propellant 18mm A3-6 model rocket motor. 2 motors, plus igniters and igniter plugs per pack. Must ship ground only.
    045856061096
  • A8-5 18mm Motor This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Estes

    A8-5 18mm Motor

    MSRP: $10.29
    $8.99
    The Estes A8-5 18mm motor is an upper stage motor best used with small, lightweight BT-20 models like the Viking or the Wizard, or as an upper stage in a multiple stage rocket. In heavier, fatter model,s its low total impulse and long delay will result...
    047776015999
  • This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Estes

    A8-3 Bulk Pack of 24 18mm Motors

    MSRP: $71.99
    $61.19
    This is a bulk pack of 24 18mm A8-3 model rocket motors, intended for group launches, packaged in bulk to lower the price per motor. Includes 24 A8-3 model rocket motors, 30 igniters, 30 igniter plugs, and 72 sheets of recovery wadding.
    047776017818
  • 2 pack of B6-4 motors This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Quest

    Quest B4-4 18mm Motor

    MSRP: $8.99
    $7.64
    2 pack of Quests's Black Jack composite propellant 18mm B4-4 model rocket motor. 2 motors, plus igniters and igniter plugs per pack. Must ship ground only.
    045856061126
  • 2 pack of B4-6 motors This item can ship inexpensively via USPS Parcel Post, or you can pick it up in person for free!

    Quest

    Quest B4-6 18mm Motor

    MSRP: $8.99
    $7.64
    2 pack of Quests's Black Jack composite propellant 18mm B4-6 model rocket motor. 2 motors, plus igniters and igniter plugs per pack. Must ship ground only.
    045856061133