AEROTECH 29-54mm DMS Disposable Motor System Instruction Manual
- June 11, 2024
- aerotech
Table of Contents
29-54mm DMS ™ Disposable Motor System™ Adjustable Delay
& Ejection Charge Single-Use Rocket Motor
Assembly & Operation Instructions
29-54mm DMS Disposable Motor System
DO NOT OPEN ROCKET MOTOR PACKAGING UNTIL READY TO USE
Note: Motor designation and complete performance specifications (including a
sample time-thrust curve) are printed on the DMS motor label and package.
WARNING-FLAMMABLE: Read Instructions Before Use. Use only in accordance
with instructions. Do not smoke near rocket motors and keep away from open
flames and other heat sources. Sale to persons under 18 years of age
prohibited by federal law. ‘H’ and higher power motors for use only by
certified flyers. Ignite by electrical means only.
CAUTION: Keep out of reach of children. Motor is hot after firing.
Before You Begin:
- Do not modify the motor in any way, except as described herein.
- If any parts are missing or damaged, please call AeroTech at 435-865-7100.
- ROCKETS WITH OVER 2,560 N-SEC TOTAL IMPULSE MUST ALSO USE ELECTRONIC RECOVERY SYSTEM DEPLOYMENT MEANS! (NFPA 1127 4.10.2)
Package contents:
- DMS rocket motor
- Igniter & ejection charge kit (igniter only w/H45W & K76WN)
Other items needed:
- Universal™ delay drilling tool
- Hobby knife or scissors
Setting the Time Delay
Notes: If you want to use the longest (as-supplied) time delay, do not
use the delay drilling tool and instead proceed to step 2.1. Plugged motors
such as the H45W and
K76WN do not have an adjustable time delay and ejection and must use
alternative means of recovery system deployment, skip to step 3.1.
1.1 WARNING: Do not smoke and ensure that there are no open flames or heat
sources nearby when setting the time delay. Assemble the AeroTech Universal
delay drilling tool with the desired amount of delay time removal (i.e., the –
4 or – 8 seconds removal marked on the tool label) facing the exposed drill
bit and motor bulkhead.
1.2 Optional: Place the washer between the drill knob and the tool if you want
to remove 2 seconds less than the value printed on the tool (i.e., – 2 or – 6
seconds removal). CAUTION: Do not shorten the time delay to a value of
less than 6 seconds.
NOTE: The I65W is sold as a fixed delay motor and is not adjustable.
1.3 Place the open end of the tool over the motor bulkhead, hold the tool and motor firmly against each other and turn the drill knob several times clockwise until the drill knob sits flush against the drill tool body.
1.4 Remove the tool and shake out the shavings from the tool and motor
bulkhead. Dispose of the shavings by burning with a safe method and in a safe
location.
2. Installing the Ejection Charge and Ejection Cap
2.1 Open the supplied igniter and ejection charge kit and remove the
contents.
2.2 Place the ejection charge baffle washer into the ejection charge well of
the motor bulkhead.
2.3. WARNING: Do not smoke and ensure that there are no open flames or
heat sources nearby when installing the ejection charge. Open the ejection
charge vial and dispense the desired amount of black powder ejection charge
into the ejection charge well of the motor bulkhead. Use about ½ of the
contents of the vial for 2.6” diameter rockets and smaller, and the entire
vial for 3” and larger rockets.
Note: additional ejection charge may be required for rockets exceeding 4”
in diameter.
2.4 Insert the rounded end of the ejection charge cap into the ejection charge
well of the bulkhead and press in completely with the end of the igniter tube
or similar object.
3. Igniter Installation and Preparation for Flight
CAUTION: Install the igniter in the motor only when the rocket is at the
pad and ready for launch.
3.1 Remove the supplied FirstFire™ igniter from the cardboard tube and
straighten the leads.
3.2. Strip ½”-1” of insulation from the ends of the leads. 3.3 Insert the
black-coated end of the igniter into the nozzle opening and push it completely
into the motor core, until the coated end is touching the time delay element
or the motor bulkhead. IMPORTANT: On the H45W and I65W motors that have an
offset “moonburning” core, insert the coated end of the igniter through the
nozzle and
over toward one side of the casing, and rotate the motor until you find the
propellant core space. Then continue pushing the igniter into the core space
as far as it will go.
3.4 Using a hobby knife or scissors, cut a corner off the end of the nozzle
cap (if supplied) to produce a vent hole in the cap about 1/16”-1/8” wide.
3.5 Press the open end of the nozzle cap over the exposed nozzle extension to
hold the igniter firmly in place. Note: If there is no nozzle cap supplied
with the motor, use a piece of masking tape to secure the igniter to the
motor.
3.6 Install the motor into the rocket’s motor mount tube. Ensure that the
motor is securely retained in the rocket by using positive mechanical means to
prevent it from
being ejected during recovery system deployment.
3.7 Prepare the rocket’s recovery system and then launch the rocket in
accordance with the National Association of Rocketry (NAR) and/or Tripoli
Rocketry Association (TRA) safety codes. Note: After use, the rocket motor
casing may be disposed in inert trash.
Storage and Handling
Store AeroTech rocket motors in a dry place where the temperature will remain
between 45
F. Do not cut, saw, attempt to alter the size, attempt to disassemble, attempt
to modify (except as described in these instructions), or drop an AeroTech
rocket motor. Do not use an AeroTech rocket motor that you believe has been
damaged in any way. Do not ignite an AeroTech rocket motor indoors. Do not
breathe fumes from the rocket motor exhaust.
First Aid
For a minor burn, apply a burn ointment. For a severe burn, immerse the burned
area in ice water at once and see a physician as quickly as possible. In the
unlikely event of oral ingestion of the propellant, induce vomiting and see a
physician as quickly as possible. The composite propellant used in AeroTech
rocket motors consists primarily
of Ammonium Perchlorate and a rubber-like plastic elastomer. Redline™
propellant also contains Strontium Nitrate.
Disposal
Pack motor firmly in hole in ground so that only the nozzle is exposed, away
from people, animals, buildings and flammable materials. Ignite motor
electrically from a distance of 30 feet or more. Propellant, delay and
ejection charge (if installed) will burn until consumed. Wait 5 minutes and
then dispose of the motor casing in inert trash.
Fire Safety
AeroTech composite rocket motors will normally not ignite unless subjected to
direct flame. Use water to fight any fires in which AeroTech rocket motors may
become
involved: Direct the water at the AeroTech rocket motors to keep them below
their 550 deg. F autoignition temperature. Foam and carbon dioxide fire
extinguishers will NOT extinguish burning propellants of the type used in
AeroTech rocket motors. Keep rocket motors away from flames, sources of heat
and flammable materials.
Disclaimer and Warranty
NOTICE: As we cannot control the storage and use of our products, once
sold we cannot assume any responsibility for product storage, transportation
or usage. RCS
shall not be held responsible for any personal injury or property damage
resulting from the handling, storage or use of our product. The buyer assumes
all risks and liabilities
therefrom and accepts and uses AeroTech/RCS products on these conditions. No
warranty either expressed or implied is made regarding AeroTech/RCS products,
except for replacement or repair, at RCS’s option, of those products that are
proven to be defective in manufacture within one year from the date of
original purchase. In no case will AeroTech warranty a product more than five
(5) years after the date of manufacture. For repair or replacement under this
warranty, please contact RCS. Proof of purchase will be required. Note: Your
state may provide additional rights not covered by this warranty.
AeroTech Division
Made in U.S.A.
RCS Rocket Motor Components, Inc.
P/N 21049 Rev. 3/22/22
Cedar City, UT 84721
Certified by the Tripoli Rocketry Association
www.aerotech-rocketry.com
©2014-2022 RCS Rocket Motor Components, Inc., All rights reserved