RMS
(reloadable motor system) is the newest technological breakthrough in HPR.
A reloadable motor is made up of the aluminum alloy casing, the foward
& aft closures, and the composite reload. You spend about 3-5 minutes
putting the reload together, launch, and throw the used reload away(not
the motor casing). If anything goes wrong, they are designed to blow out
of the nozzle, not explode(no one wants their rocket to become a pipe bomb).
They are also the same phisical size as black powder motors and once again,
you get the option of White Lightning, Black Jack, or Blue Thunder. Some
RMS cases are designed to fit in model rockets (just make sure the rocket
can withstand the speed). The reloads and cases are mainly made by Aerotech,
Kosdon, and Vulcan. (I've only built Aerotech's so I don't know much about
the others.) As far as I know, they come in seven different sizes, 18mm
(A-C sized), 24mm (D and E sized), 29mm(F, G, and low H), 38mm(high H,
I, and low J), 54mm(J and low K), 98mm(high K, L, M, and N), and 101mm(O
and P). BUT, you need a level 1 certification by Tripoli or the NAR to
purchase H and I reloads, level 2 to buy J, K, & L and level 3 for
M and above. RMS motors are much more economical than single use motors.
The motor casing could be expensive at first, but after that it's much
cheaper than single use, especially for the bigger motors. A 29/40/120
motor case costs about $38.00 . Do the math, an Aerotech 29mm G64W reload
costs about $6.50 and a single use G40W costs about $12.00. They both have
the same power of 120ns. Which would you rather buy?
