Heres the nozzle for the J465 KN/SB motor. The graph to the right shows the theoretical performance according to R. Nakkas SRM program. See his link, if you haven't already.
The raw cone, just after stripping out the foam. VCP was a big help here for cutting the gores of glass to shape. This is a ~4.5:1 Ogive, 2 layers of glass, and the strips wrapped 45 degrees. See in finished form on the picture of "Sugar High" above.
This page was last updated on: July 30, 2006
Thanks for stopping in. This is a work in progress meant to document and communicate some of our latest experimental and high power rocketry innovations. Feel free to send an email with any questions or comments. All are appreciated.
Coming soon will be..................
continued site layout / index improvements
Launch system details.....10' uni strut rail with linear actuator driven lift. Now making good progress on this, expected to use for 11/10 launch.
Differential Inertia operated Tracking System
Motor Test Stand
This is a photo of the release mechanism that allows dual event deployment from the forward end of the airframe. The 1/4 dowel captures a small sheet metal "key" (not shown) that retains the main chute. A small pyro charge is ignited via e-match subsequently forcing the 1/4 dowel to release the key. The key is retained in the mechanism and ready for another flight quite easily. See the animation for a good visualization of the mechanism in action.
Similar to the early PRM's, this design has been refined for better reliability, field servicability and strength. I now use it exclusively with great success, it really works smoothly.
Weather and work permitting, site will be updated prior to the event.
At this time I am primarily flying with KNO3 / Sorbitol motors. I have had good results using a small percentage (1% to 2%) glycerin to the fuel to aid "castability" to the molten slurry. Also in early test phase is Sparky propellant. More to come on this, after the load cell is completed.