DO NOT OPEN RELOAD KIT UNTIL READY TO USE.
PARTS:
RMS™-75 HARDWARE
75mm aft closure
1
75/5120 case
1
75mm plugged forward closure
1
75mm forward seal disk
1
RELOAD PARTS KIT
Nozzle (large black plastic part)
1
Liner (2-3/4" O.D. black plastic tube)
1
Propellant grains (7/8” core)
4
Fwd & aft o-rings (1/8" thick X 2-3/4" O.D.)
2
Forward seal disk o-ring (3/32” thick x 2-9/16” O.D.)
1
Smoke charge (short solid part)
1
Smoke charge insulator (1-1/2" O.D. tube)
1
Nozzle Cap (2-1/4” dia. red cap)
1
ITEMS NEEDED FOR USE:
• Synco™ Super Lube™ or other grease
• Hobby knife
• Electric match w/thermalite, Firestar™ or other igniter
• Masking tape
• Wet wipes or damp paper towels
SAVE THE RELOAD KIT PLASTIC BAG FOR THE USED RE-
LOAD PARTS. DISPOSE OF BAG AND PARTS PROPERLY.
HIGH-POWER RMS™
HIGH-POWER RMS™
HIGH-POWER RMS™
HIGH-POWER RMS™
HIGH-POWER RMS™
Assembly and Operation Instructions
Assembly and Operation Instructions
READ THIS BEFORE YOU BEGIN:
• Study the illustrations and sequence of assembly.
THE SEQUENCE OF ASSEMBLY IS
EXTREMELY IMPORTANT. READ ALL INSTRUCTIONS BEFORE USE. USE RMS™
MOTORS AND RELOAD KITS ONLY IN ACCORDANCE WITH ALL INSTRUCTIONS.
Review the parts list and become familiar with all parts before assembly.
IF ANY PARTS
ARE MISSING OR DAMAGED, CONTACT RCS AT 1-435-865-7100 or email at
warranty@aerotech-rocketry.com.
•
DO NOT USE ANY PARTS OF THE RMS™ SYSTEM THAT ARE DAMAGED IN ANY
WAY.
If in doubt, contact RCS at the number above for assistance.
•
DO NOT MODIFY THE MOTOR IN ANY WAY.
Modification of the motor or the reload
kit parts could result in motor failure, lead to the destruction of both your rocket and motor
and may cause personal injury, death and/or property damage. Modification of the motor
or reload kit in any way will invalidate your motor warranty.
•
USE ONLY AEROTECH/RCS RMS™ RELOAD KITS AND MOTOR PARTS TO
REFURBISH YOUR RMS™ MOTOR.
The AeroTech/RCS reload kits have been
designed specifically for use in your particular AeroTech/RCS RMS™ motor. Use of
imitation components may destroy your motor, rocket and payload and will invalidate
your motor warranty. Only use AeroTech/RCS RMS™ reload kits intended for your
specific AeroTech/RCS RMS™ motor.
DO NOT INTERCHANGE PARTS!
Do not use
AeroTech/RCS RMS™ reload kits or motor components for any other purpose than to
refurbish an AeroTech/RCS RMS™ motor.
•
DO NOT REUSE ANY OF THE DISPOSABLE PARTS OF THE RMS™ RELOAD KIT.
This includes the liner, nozzle and o-rings. These components have been designed for
one use only and must be discarded after firing. Reuse can result in motor failure during
subsequent operation and will invalidate your motor warranty.
• Motors are hot after firing. Although the RMS™ operates at a lower temperature than
most disposable motors, the higher thermal conductivity of the aluminum motor parts
may make it seem otherwise. If necessary to handle a motor before it has cooled down,
use a rag or similar article.
• Read and follow the safety code of the Tripoli Rocketry Association (TRA) and comply
with all federal, state and local laws in all activities involving high power rockets.
Chapter 1. Forward Closure Assembly
1-1.
Apply a light coat of Synco™ Super Lube™ or other
grease to all threads and all three o-rings. This will
facilitate assembly and prevents the threads from seiz-
ing.
1-2.
Fig.-1:
Hold the forward (black) closure in a vertical
position, smoke charge cavity facing up. Insert the
smoke charge insulator into the smoke charge cavity
until it is seated against the forward end of the cavity.
1-3.
Fig.-2:
Apply a liberal amount of grease to one end of
the smoke charge element. Insert the
greased
end of
the smoke charge element into the smoke charge cavity
until it is seated against the end of the cavity. Set the
completed forward closure assembly aside.
2-1.
Fig.-3:
Using a hobby knife or similar tool, carefully
deburr (chamfer) both inside edges of the liner tube (2-
3/4” O.D. black plastic tube).
75mm Forward
(Black) Closure
Smoke Charge
Insulator
Smoke
Charge
Cavity
Smoke Charge
Element
Fig.-1
Fig.-2
2-2.
Fig.-4:
Insert the larger diameter portion of the nozzle
into one end of the liner, with the nozzle liner flange
seated against the liner.
NOTE:
RMS-75/5120 motors
use a single large throat nozzle rather than the multiple-
throat “Medusa” nozzle shown in the illustrations.
2-3.
Fig.-5:
Perform the remaining assembly steps with the
liner held in a horizontal position. Install the propellant
grains into the liner, seated against the nozzle grain
flange.
NOTE:
Three propellant grains are shown in all
illustrations for simplicity. RMS-75/5120 motors use
four (4) grains.
2-4.
Fig.-6:
Place the greased forward seal disk (3/32" thick
X 2-9/16" O.D.) o-ring into the groove in the forward seal
disk.
2-5.
Fig.-7:
Insert the smaller (o-ring) end of the seal disk
into the open end of the liner tube until the seal disk
flange is seated against the end of the liner.
2-6.
Fig.-8:
Push the liner assembly into the motor case until
the nozzle protrudes approximately 1-3/4” from the end
of the case.
NOTE:
A coating of grease on the outside
surface of the liner will facilitate installation and casing
cleanup after motor firing.
2-6.
Fig.-9:
Place the greased forward (1/8" thick X 2-3/4"
O.D.) o-ring into the forward (bulkhead) end of the case
until it is seated against the forward seal disk.
2-7.
Fig.-10:
Thread the previously-completed forward clo-
sure assembly into the forward end of the motor case by
hand until it is seated against the case.
NOTE:
There
will be considerable resistance to threading in the
closure during the last 1/8" to 3/16" of travel.
2-8.
Fig.-11:
Place the greased aft (1/8" thick X 2-3/4" O.D.)
o-ring into the groove in the nozzle.
2-9.
Fig.-12:
Thread the aft closure into the aft end of the
motor case by hand until it is seated against the case.
NOTE:
There will be considerable resistance to thread-
ing in the closure during the last 1/8" to 3/16" of travel.
It is normal if a slight (1/32” to 1/16”) gap remains
between the closure and the case, and the grains rattle
slightly in the liner after tightening.
Fig.-6
Case
Fig.-8
Fig.-9
Forward O-Ring
Fig.-3
Fig.-12
Aft Closure
Case
Fig.-11
Fig.-10
Forward Closure
Assembly
Aft
(Nozzle)
End Views
Case
Nozzle
Case
Fig.-4
Fig.-5
Chapter 2. Case Assembly
Deburr (Chamfer)
Both inner Edges
Liner
Greased
End of
Smoke Charge
Chapter 2. Case Assembly (Cont’d)
Liner
(Deburred)
Nozzle (Protrudes
About 1-3/4”)
Aft O-ring
Nozzle
Liner Flange
Forward Seal
Disk (Aluminum
Washer)
Greased Forward
Seal Disk O-ring
Fig.-7
Forward Seal
Disk Assembly
Liner
Forward
Seal Disk
Liner
Nozzle
Grain Flange
Propellant
Grains (7/8” Core)
