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== Motor Lines == === Single-Use === Aerotech has several lines of single-use motors. ==== Q-Jet ==== These are Quest-branded low-power motors ranging from A to F impulse in the standard Estes 18 and 24mm form factors. ==== Unnamed Single-Use, Enerjet, Econojet, Economax ==== These are small single-use motors in 24 and 29mm size ranging from E to G impulse. Some are branded Enerjet, Econojet, or Economax, but others do not seem to belong to any particular lines. ==== LMS (29mm) ==== These are versions of the G7R7, G78G, and G79W single use motors that come disassembled. One would think that they can be shipped via USPS without Hazmat charges, but apparently they cannot, according to the Aerotech Master Motor Matrix. The user must assemble them with epoxy. ==== DMS ==== These are fiberglass-cased high-power motors ranging from 29mm up to 98mm. Motors that have ejection charges can have their delay times adjusted with the Universal Delay Drilling Tool. Motors from 29mm up through 54mm come fully assembled and ready to fly, but 75mm and 98mm DMS motors must be assembled before use with epoxy. ==== LMS (54mm) ==== The K250W is essentially 54mm RMS but comes with a non-anodized casing tube that is not designed to be reused. The user must supply forward and aft closures, which can be reused. === Reloadable === Reloadable motors utilize reusable aluminum casings and closures to contain pressure, and the reloads themselves come with single-use nozzles, insulating liner, propellant, O-rings, and delay/smoke grain. Aerotech's overall brand for these is Reloadable Motor System, or RMS. ==== Hobbyline RMS ==== Hobbyline motors are a line of reloadable motors and casings consist of 18mm, two sizes of 24mm, and one 29mm. The RMS 18/20 has C and D motors, the RMS 24/40 has D through F motors, the RMS 24/60 has F motors, and the RMS 29/40-120 ranges from E through G motors. They use a slightly different forward closure sealing mechanism from the standard RMS motors, with the delay O-ring located on the forward face of the delay grain. Only one motor, the G138T for the RMS 29/40-120, requires high power certification. ==== RMS-RC ==== These are 24mm and 32mm casings that have D and E, and F and G reloads respectively. All of these reloads are endburners designed for use with rocket-powered boost gliders. All of these motors are plugged with no smoke grain. ==== RMS ==== Normal RMS motors are available in 29mm, 38mm, 54mm, 75mm, and 98mm sizes. 29mm F and G motors that are not actually high power are labeled as "High Power Style" to distinguish them from Hobbyline RMS motors. RMS hardware consists of the casing itself (a tube with threads on the end), with an aft closure that holds the nozzle in and a forward closure that contains the delay/smoke grain. Unlike the Hobbyline RMS line, the delay grains on 54mm and smaller RMS are sealed with an o-ring that contacts the outer surface of the delay grain's casting tube. [[Aerotech RMS Hardware Models]] are available for fit check and Outer Mold Line (OML) dimensions, ===== Special Hardware for RMS ===== * Forward Seal Disk: an aluminum disc with a hole in the center and an o-ring groove on the outside that seals the forward end of the liner in order to prevent gas from passing around the outside of the liner and damaging the case. These are used on longer motors and some smaller motors that are particularly high-performance. In 75mm and 98mm there is a stainless steel variant; the 98mm one is used specifically for Super Thunder motors. * Endburn Style Forward Closure: in 38mm, the endburning Warp 9 motors do not include a delay grain and use a unique forward closure that supports the front of the grain and displace all empty volume. * Forward Closure Bulkhead Plug: in 54mm and 98mm, in lieu of a special forward closure, a plastic plug replaces the delay grain that sticks forward enough to fill the empty spaces forward of the grain. * 54mm Extended Forward Closure: in 54mm, long burn White Lightning motors (including the loadable K250W ) require a longer smoke grain than the standard forward closure accounts for. * 54mm Small Nozzle Aft Closure: in 54mm, the lowest-thrust motors use a smaller nozzle (also used in 38mm motors) that requires an aft closure with a smaller opening to retain it. * 98mm Enlarged Aft Closure: newer 98mm reloads use a larger nozzle that does not fit through the older 98mm aft closure. This works with all 98mm reloads so this is the only 98mm closure currently sold. ===== Reload Adapter System ===== In response to the popularity of CTI's case spacers, Aerotech developed the Reload Adapter System of case spacers for RMS 29mm, 38mm, 54mm, and 75mm so reloads can be flown in a larger size case than originally intended. * Floating Forward Closure: Instead of threading directly into the case, the floating forward closure supports the sealing O-ring and holds the delay/smoke grain and ejection charge. * Forward Closure Retaining Ring: This threads into the casing and keeps the floating forward closure in the case. * Case Spacer: This goes between the floating forward closure and retaining ring, holding the forward closure in the position it would be with a smaller case size. ==== RMS-EZ ==== RMS-EZ motors are very similar to RMS motors with the Reload Adapter System, but they come with a preassembled plastic floating forward closure and delay assembly that can be adjusted with the same Universal Delay Drilling Tool as DMS motors, making it much easier for users to assemble. They use standard aft closures and the Reload Adapter System forward closure retaining ring and spacers. [[Category:Rocket Motor Manufacturers]]
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