For whatever reason, I dipped all my MicroMaxx (MMX) igniters to be used in 18mm engines. I can't find my spool of nichrome wire. I did have some old, original MMX igniters.
These igniters (pictured to the left) were the type used in the original Quest MMX "Silo" style launcher. To see the Silo launcher: CLICK HERE
These encased igniters were plugged into the launcher so the nichrome ends (at the bottom) made contact. The small rocket was simply slid over the wire "V" at the top. Many silo launches were unsuccessful when combined with the Quest controller and 9 volt transistor battery.
In the picture to the left, the plastic housing is being pried open. The two halves are friction fit and should come apart easily.
Here's the open halves of the housing.
The igniters is held in place with what looks like a piece of masking tape. Carefully lift out the igniter and peel off the tape.
On the right is an igniter you can use with your existing micro clip controller.
I like to use square toothpicks to hold the igniter in place. Round toothpicks could act like a plug, where the square sides (in a round nozzle) allow for some venting.
With the igniter wires slid into the nozzle, there isn't much room for the toothpick. The end on the toothpick was tapered with a sanding block.
NOTE: The toothpick isn't shoved into the nozzle, it only holds the igniter in place. In rare cases, MMX engines have exploded when the the igniter and plug are forced in too tight!
Usually, you gently slide the igniter in the nozzle, then set the rocket engine and igniter on a toothpick. The weight of the rocket holds the toothpick in the nozzle. The low end of the toothpick rests on the blast defector.
No comments:
Post a Comment