bobkrech
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After discussions with the manufacturer, due to a major increase in failures of the J1999N Warp Nine motor, and at their request, we have decided to pull the certification for this motor reload. This decertification action is considered temporary as RCS/AT is working to solve the problem. Once the problem is identified, examples will be re-run by TMT to check base-lines and verify serviceability and a hopeful return to service. Any changes to the current design, requiring modified grains or additional parts, will be replaced by Aerotech to those members holding stocks of these motors.
https://www.aerotech-rocketry.com/news.aspx?y=2010#n122 (Text Below)
Paul Holmes
Chairman, Tripoli Motor Testing
6/15/2010
AeroTech Product Bulletin 2010-1: J1999N-P Reliability Issue
AeroTech has become aware of a potential issue affecting the reliability of the J1999N-P "Warp-9" reload kit that fits AeroTech, Dr. Rocket and Rouse-Tech RMS-54/1280 hardware.
During two rocket "drag races" flown at LDRS-29 held at Lucerne Dry Lake on 6/12/10 and 6/13/10 there were four (4) observed failures of RMS-54/1280 motors loaded with J1999N reloads. All incidents involved ejection of the forward and/or aft closure at or shortly after ignition. It was reported that some or all of these motors used Copper thermite or large pyrogen-tipped initiators for ignition. AeroTech believes that this and other factors may have contributed to the failures, but until AeroTech has performed additional research and investigation into the incidents we cannot yet arrive at a definitive explanation.
AeroTech`s dealers are requested not to sell, and consumers are advised not to operate J1999N reloads until further notice. AeroTech is now in the process of designing and testing a revised version of the J1999N that will have demonstrated acceptable reliability, with specific instructions concerning approved ignition methods and assembly procedures.
Once the revised J1999N is approved by Tripoli Motor Testing (TMT), AeroTech anticipates that it will produce a "repair kit" that consumers possessing unfired J1999N reloads will be able to obtain at no cost through any authorized AeroTech high-power dealer. This kit will likely include one or more replacement propellant grains as well as additional components and revised instructions. More specific terms and conditions of the product upgrade will be forthcoming. As always, AeroTech will honor valid warranty claims for all its products including the J1999N.
Customers with questions concerning this product bulletin may contact AeroTech at 435-865-7100 begin_of_the_skype_highlighting 435-865-7100 end_of_the_skype_highlighting or via email at [email protected]. AeroTech appreciates its customers` patience and understanding as we work to resolve this issue.
After discussions with the manufacturer, due to a major increase in failures of the J1999N Warp Nine motor, and at their request, we have decided to pull the certification for this motor reload. This decertification action is considered temporary as RCS/AT is working to solve the problem. Once the problem is identified, examples will be re-run by TMT to check base-lines and verify serviceability and a hopeful return to service. Any changes to the current design, requiring modified grains or additional parts, will be replaced by Aerotech to those members holding stocks of these motors.
https://www.aerotech-rocketry.com/news.aspx?y=2010#n122 (Text Below)
Paul Holmes
Chairman, Tripoli Motor Testing
6/15/2010
AeroTech Product Bulletin 2010-1: J1999N-P Reliability Issue
AeroTech has become aware of a potential issue affecting the reliability of the J1999N-P "Warp-9" reload kit that fits AeroTech, Dr. Rocket and Rouse-Tech RMS-54/1280 hardware.
During two rocket "drag races" flown at LDRS-29 held at Lucerne Dry Lake on 6/12/10 and 6/13/10 there were four (4) observed failures of RMS-54/1280 motors loaded with J1999N reloads. All incidents involved ejection of the forward and/or aft closure at or shortly after ignition. It was reported that some or all of these motors used Copper thermite or large pyrogen-tipped initiators for ignition. AeroTech believes that this and other factors may have contributed to the failures, but until AeroTech has performed additional research and investigation into the incidents we cannot yet arrive at a definitive explanation.
AeroTech`s dealers are requested not to sell, and consumers are advised not to operate J1999N reloads until further notice. AeroTech is now in the process of designing and testing a revised version of the J1999N that will have demonstrated acceptable reliability, with specific instructions concerning approved ignition methods and assembly procedures.
Once the revised J1999N is approved by Tripoli Motor Testing (TMT), AeroTech anticipates that it will produce a "repair kit" that consumers possessing unfired J1999N reloads will be able to obtain at no cost through any authorized AeroTech high-power dealer. This kit will likely include one or more replacement propellant grains as well as additional components and revised instructions. More specific terms and conditions of the product upgrade will be forthcoming. As always, AeroTech will honor valid warranty claims for all its products including the J1999N.
Customers with questions concerning this product bulletin may contact AeroTech at 435-865-7100 begin_of_the_skype_highlighting 435-865-7100 end_of_the_skype_highlighting or via email at [email protected]. AeroTech appreciates its customers` patience and understanding as we work to resolve this issue.
