Unless it's a scale kit or a bring back that uses a special length tube just about every design I've done for Estes uses Excess Parts or standard 18" long tubes. The name of the rocket can even reflect this such as EPM, (Excess Parts Model) followed by a number that may be the year it cam out. STM ( Slotted Tube Model ). Many time we pick a working name for the model while its going through the design and manufacturing process to have something to reference. Some times this temporary name becomes the final name.


John Boren