Rocketry Planet

CEDAR CITY, Utah USA — RCS is making four different "EMK" motor kits available to the experimental rocket community.

Over the past few years, a number of customers have been requesting that RCS produce experimental motor designs in kit form. After considering several options, it was decided to release an initial line of products based on a variety of popular single-use motor configurations.

These include 60 newton-second (part no. EMK2960SC) and 80 newton-second (part no. EMK2980SC) 'F'-class motors and two different 'G' designs (part nos. EMK29120C and EMK29120S).

RCS is making four different "EMK" motor kits available to the experimental rocket community.

The 'G' kits are different only in the thickness of the paper liner that is packaged with each kit. The 'C' version uses a thin liner for core-burning designs while the 'S' kit includes a thicker liner which is best suited for longer-burning slotted grains. The two 'F' class kits use the thicker liner that may be used with either cored or slotted grains.

The new RCS EMKs use a one-piece phenolic case that includes an integral molded nozzle. The case has been tested to over 1,000 PSI but is recommended for motors running in the 500-600 PSI range. The nozzle throat and exit cone may be easily drilled to accommodate a wide array of grain designs and propellant formulations. The bulkhead end of the case is threaded to accept an included matching molded forward closure which can be bonded to the case with 5-minute epoxy.

The kits contain universal delay charge components such as an o-ring, delay insulator and an ejection charge cap. Users can separately purchase RCS propellant and delay casting tubes that are specified in the EMK "assembly guides" which are packaged with each motor kit. Alternatively, the guides suggest that the customer purchase AeroTech "RDK" pre-manufactured delay elements for use with the kits. The assembly guides have a detailed assembly drawing on the reverse side which portrays a typical motor configuration. A bondable aft thrust ring is also provided for the user's convenience.

EMK prices range from $8.00 each for the 60 N-sec kit to $10.00 each for the 'G' motor kits. Customers should note that RCS EMKs contain no hazardous materials since the propellant, igniter, delay, delay spacer and ejection charge are not included.

Please visit the "Products" page on the RCS website at http://www.rocketmotorparts.com/ to download the current RCS order form which details prices, shipping costs and other information. In addition, all four EMK assembly guides may be downloaded in PDF format from the RCS "Resources" page.

RCS Rocket Motor Components, Inc., Cedar City, UT.