AeroTech Releases 54mm RMS™ Delay Drilling Tool
AeroTech is releasing a new delay drilling tool for use with its line of 54mm RMS™ reloadable motors.
The 54mm RMS Delay Drilling Tool™ (or RDDT54™, P/N T082510-2) is designed for shortening RMS delay elements to adjust the time delay of a 54mm AeroTech RMS reloadable motor. The RDDT54 consists of a machined drill tool body and a 1/4” stub drill bit with an attached knob. The tool also has a provision for calibration, as the tip of the drill bit must be flush with the end of the tool body for accurate use. Though adjusted initially at the factory, a set screw placed within the knob makes any necessary readjustment easy.
The ends of the tool are counterbored with recesses that are labeled with 4 or 8 second reductions in the delay time. To use, the RMS delay element is placed into the desired end of the tool and held firmly in place, the drill bit is inserted and the knob is rotated clockwise until the bit is fully seated in the delay and no resistance is felt. In addition, a supplied 1/16” thick washer may be placed between the drill tool body and the drill knob to shorten the delay to an intermediate value (i.e., shortening the delay by 2 or 6 seconds).
As is always the case with drilled RMS delays, the delay element should be installed in the motor with the drilled end facing the propellant grains (or away from the ejection charge) for best delay accuracy. Also, no delay should be shortened to less than 4 seconds.
AeroTech is planning to eventually sell most 54mm RMS reloads in only the longest certified delay, so the RMS Delay Drilling Tool will be essential for the future use of the 54mm RMS line of products.
The suggested retail price of the RDDT54 is $14.99. It will also be available in a set, packaged with the previously-released 18-38mm RDDT. Contact your favorite AeroTech dealer to purchase the new 54mm RMS Delay Drilling Tool.
Tripoli Motor Testing Approves Reduced Diameter RMS Aft Closures
Tripoli Motor Testing (TMT) has approved "reduced diameter" aft closures for the 54 & 98mm high-power RMS™ motors. The knurled ring on the aft end of these closures has been reduced to the same diameter as their respective motor cases, allowing them to be used in minimum diameter rocket vehicles without protrusion of the closure into the airstream, and in the upper stage of a 2-stage rocket by allowing the aft end of the motor to easily slip into the booster stage of a 2-stage rocket. The closures are currently available from Rouse-Tech, a licensed supplier of RMS™ hardware.
In Remembrance: Dr. Franklin Kosdon
Very sad news to report that our good friend and colleague Dr. Frank Kosdon passed away in his sleep on Friday, 4/8/11 at his home in Ventura, CA. Funeral services will be at the Mt. Sinai Memorial Park in Hollywood Hills on Thursday 4/14 at 1 PM. Please visit the Mt. Sinai website for directions and more information.
Photo taken at LDRS-20 at Lucerne Dry Lake, CA in 2001.