MERRIMACK, New Hampshire USA — Jim Flis has announced that the instructions are completed and all of the materials are in now for FlisKits to announce two new engine mount kits within the next two to three weeks.

EMK4-18-70, a four engine 18mm cluster motor mount designed to fit into a BT-70 body tube.

The first is the EMK4-18-70, a four engine 18mm cluster motor mount designed to fit into a BT-70 body tube. The motor mount kit includes the engine hooks and two custom centering rings, complete with notches for the hooks.  This motor mount configuration came about as a direct result of feedback and requests from Team America Rocketry Challenge (TARC) teams.

The EMK4-18-70 clustered engine mounts are available now, free of charge (limited to the first 30 requested) for registered TARC teams. It you are a registered TARC team, have a team member or mentor contact FlisKits directly about them.

EMK7-18-70, a cluster kit that will house seven 18mm model rocket motors in a BT-70 body tube.

The other new engine mount kit is the EMK7-18-70, a cluster kit that will house seven 18mm model rocket motors in a BT-70 body tube.  According to Flis, "this is very tough to do when you realize that the diameter of a 7 X 18mm cluster is larger than the inside diameter of the BT-70 itself. The solution comes from the mind of Robert Alway and is recreated, with Robert's permission, in the EMK7-18-70 Engine Mount Kit."

It turns out that if you measure across the inside diameter of the clustered 18mm motor tubes, it almost exactly matches the inside diameter of the BT-70 body tune.  So, you replace the normally used engine block with stage couplers in the outer six motor mount tubes and that provides you with a sleeve that will fit inside the BT-70.  The solution is, according to Flis, elegant in its "simplicity."

The picture shows the assembled engine mount, but without the vent plugs in place that will also be included with the kit. Using the small vent plugs to enclose the open areas between the motor mount tubes and the main body tube, an air-tight seal is accomplished.  The graphic below shows the assembled mount with the vent plugs (6 of them) glued in place to block the holes left between the motor tubes and the BT-70 body tube.