LOC PRECISION R.A.M. 1.9 Build Instructions
- June 13, 2024
- LOC PRECISION
Table of Contents
R.A.M. 1.9” Build Instructions Instructions
R.A.M. 1.9 Build
Due to the high thrust motors that can be flown in this rocket, epoxy is
recommended!
Before beginning construction, read over instructions to become familiar with
the proper construction steps. Check Parts List to make sure you have all the
parts.
TEST FIT ALL PARTS! Light sanding may be necessary to obtain proper fit.
ITEMS YOU WILL NEED TO BUILD THIS KIT
Parts List
Check your parts before you begin your build!
- Polypropylene Nose Cone
- Slotted Booster
- Payload Section
- 12” 29MM Motor Tube
- Centering Rings (4)
- 1/16” Tubular Nylon
- 21” Parachute
- 1/4” Launch Lug/Rail Guides
- Laser Cut Fins (8)
- Vinyl Decal
STEP 1 – Motor Tube Centering Rings Assembly
A. Rough
sand the motor tube to ensure proper adhesion OR remove the outer glassine
wrap. Identify the ring with notches (1) as this is the forward most
ring.
B. With
the motor tube flush with the aft end of the slotted booster, lay the motor
tube next to the slotted booster, and mark off the position of the fin slots.
Place all 4 rings onto the motor tube and space apart to allow the fin tabs to
fit in between the rings. Use the fin tabs and slots as a measuring guide.
Tack rings into place with epoxy, allow to cure. C. Epoxy fillet both sides
where the ring meets the motor tube. Be sure to keep epoxy clear of where the
fin tabs will meet the motor tube. Allow to cure. STEP 2 – Kevlar® / Nylon
Shock Cord Assembly
Take the length of 2’ Kevlar cord and at its center make a 1” long loop knot
at one end and knot tight. Feed other end through one of the ring notches.
Wrap cord around motor tube and double knot. Place a bead of epoxy on knot.
Allow to cure.
STEP 2 – Kevlar® / Nylon Shock Cord Assembly (continued) Feed one end of
tubular nylon shock cord through the Kevlar loop. Then through other tubular
nylon ends loop. Pull tight.
STEP 3 – Motor Tube / Airframe Assembly
A.
Slather epoxy in the AFT of the airframe between each fin slot.
B. Insert motor mount assembly up the airframe. (shock cord mount end FWD).
C. Slide all the way up the airframe until the MMT is flush or slightly
recessed with the AFT of the airframe. DO NOT get epoxy inside motor tube or
on shock-cord!
Stand Airframe vertical, AFT end at bottom.
Allow epoxy to cure.
Once cured, apply a small epoxy layer to the AFT of the AFT ring. Allow to
cure.
STEP 4 – Fin to Airframe Assembly
Poor fin alignment will result in misdirected flights. Be sure to have each
fin perpendicular to the airframe. Proper addition of glue fillets to the fins
and launch lug will help durability. ightly sand the airframe exterior on each
side of the fin slots. This will remove the shiny glassine layer of the
airframe and assist in the epoxy bonding the fin to the airframe while
creating good adhesion. A. Apply a generous bead of epoxy to the root edge of
one lower fin and insert into the fin slot. Make sure the fin is at a right
angle (90˚) to the airframe. Allow the epoxy to cure before moving on to the
next fin.
Repeat the procedure for the remaining lower fins.
B. Then epoxy upper fins in place
using wood strips and clamps to keep all fins aligned.
C. When all fins are in place, apply an external fillet to each fin-to-
airframe joint.
LOC PRO Build Tip! Making Fillets is Easy!
Easy fin fillets are a simple 4 step process that will give professional
results every time.
- Mark off 1/8” rules along the fin and airframe.
- Apply tape along the rules.
- Apply glue fillets as shown.
- Remove tape while glue is still wet for straight clean fillets!
STEP 5 – Bulkhead Assembly
Install screw eye in bulkhead. Epoxy both sides where the screw eye meets the
bulkhead. Allow to cure. STEP 6 – Bulkhead / Coupler Assembly
Insert bulkhead into coupler. Epoxy fillet both sides where the bulkhead meets
coupler. Allow to cure.
STEP 7 – Coupler / Payload Assembly
Slather epoxy in one end of payload section. Insert coupler 50% (2.5”) in
payload and allow to cure.
Optional Coupler Payload Assembly You may retain the coupler with screws or
plastic rivets. This will leave the possibility of adding an electronics bay
in the future.
Click for Nylon Rivets
Click for Electronic Bays 
STEP 8 – Shock Cord Attachment
Shake or push shock cord from motor tube out the FWD end of booster.
Insert shock cord 2’ through screw eye.
Make a knot.
At the end of the shock cord, insert parachute shroud lines. Then pass
parachute canopy back through shroud line loops, pull tight.
STEP 9 – Nose Cone
Assembly
Friction fit the nose cone to FWD end of payload using masking tape. You may
alsouse plastic push rivets or screws.
Make sure the cone will NOT come off during ejection or decent.
STEP 10 – Rail Guides / Launch Lugs
Identify launch system to be utilized. Some choose to install guides on one
side and rails on the opposite, 180˚. Your choice!
Launch Lugs
-
Cut the launch lug in half at an angle, making them aerodynamic.
-
Find the high point of the air-frame between fins. Mark a straight perpendicular line up 15” from the AFT of the airframe.
-
Epoxy one lug 2” up from the AFT of the airframe.
-
Epoxy another at least 15” FWD. Allow to cure.
Rail Guides -
Install the rail guides into the booster with provided screws. Drill a hole smaller than the screw so the screw threads into it ½” forward of aft ring centered between fin set.
-
Drop a small amount of epoxy in drilled hole, thread the rail guide and screw in the hole, rotate rocket 180 degrees & let cure.
-
Repeat for the forward rail guide ½” aft of the forward ring.
Some choose to use a wood screw & drill/tighten into the aft & forward rings.
Your choice!
STEP 11 – Paint / Finish
- Spray rocket with primer, sand and repeat until smooth finish is obtained
- Spray rocket with paint of choice, let dry.
- Apply protective clear coat
- Apply vinyl decals to your liking
- Repeat with clear coat.
PREFLIGHT
Sim Your Rocket!
This rocket is recommended for high power rocket motors F through H impulse.
Depending on your flying field and finished weight, this is a very versatile
kit. The Rocksim® file is available on the 1.9” RAM product page on our
website.
Always check stability to ensure stable flight; the Center of Gravity (CG)
must be forward of the Center of Pressure (CP) in flight ready condition.
Since
Yank Aeronautics LLC dba LOC PRECISION cannot control the use of it’s products
once sold, the buyer assumes all risks and liabilities there from, and accepts
and uses LOC Precision products on these conditions. For any questions or
issues please contact LOC
directly—info@locprecision.com
© YANK AERONAUTICS LLC. dba LOC PRECISION ALL RIGHTS RESERVED
Model Rocket Safety Code
Materials – I will use only lightweight, non-metal parts for the nose, body,
and fins of my rocket.
Motors – I will use only certified, commercially made model rocket motors, and
will not tamper with these motors or use them for any purposes except those
recommended by the manufacturer.
Ignition System – I will launch my rockets with an electrical launch system
and electrical motor igniters. My launch system will have a safety interlock
in series with the launch switch, and will use a launch switch that returns to
the “off” position when released.
Misfires – If my rocket does not launch when I press the button of my
electrical launch system, I will remove the launcher’s safety interlock or
disconnect its battery, and will wait 60 seconds after the last launch attempt
before allowing anyone to approach the rocket.
Launch Safety – I will use a countdown before launch, and will ensure that
everyone is paying attention and is a safe distance of at least 15 feet away
when I launch rockets with D motors or smaller, and 30 feet when I launch
larger rockets. If I am uncertain about the safety or stability of an untested
rocket, I will check the stability before flight and will fly it only after
warning spectators and clearing them away to a safe distance. When conducting
a simultaneous launch of more than ten rockets, I will observe a safe distance
of 1.5 times the maximum expected altitude of any launched rocket.
Launcher – I will launch my rocket from a launch rod, tower, or rail that is
pointed to within 30 degrees of the vertical to ensure that the rocket flies
nearly straight up, and I will use a blast deflector to prevent the motor’s
exhaust from hitting the ground. To
prevent accidental eye injury, I will place launchers so that the end of the
launch rod is above eye level or will cap the end of the rod when it is not in
use.
Size – My model rocket will not weigh more than 1,500 grams (53 ounces) at
liftoff and will not contain more than 125 grams (4.4 ounces) of propellant or
320 N-sec (71.9 pound-seconds) of total impulse.
Flight Safety – I will not launch my rocket at targets, into clouds, or near
airplanes, and will not put any flammable or explosive payload in my rocket.
Launch Site – I will launch my rocket outdoors, in an open area at least as
large as shown in the accompanying table, and in safe weather conditions with
wind speeds no greater than 20 miles per hour. I will ensure that there is no
dry grass close to the launch pad, and that the launch site does not present
risk of grass fires.
Recovery System – I will use a recovery system such as a streamer or parachute
in my rocket so that it returns safely and undamaged and can be flown again,
and I will use only flame-resistant or fireproof recovery system wadding in my
rocket.
Recovery Safety – I will not attempt to recover my rocket from power lines,
tall trees, or other dangerous places.
Launch Site Dimensions
Installed Total Impulse (N-sec)| Equivalent Motor Type| Minimum
Site Dimensions (Ft.)
---|---|---
0.00 – 1.25| 1/4A, 1/2A| 50’
1.26 – 2.50| A| 100’
2.51 – 5.00| B| 200’
5.01 – 10.00| C| 400’
10.01 – 20.00| D| 500’
20.01 – 40.00| E| 1,000’
40.01 – 80.00| F| 1,000’
80.01 – 160.00| G| 1,000’
160.01 – 320.00| Two G’s| 1,500’
Schools, Clubs and Other Groups
Loc Precision Multi-Packs are available for this and other Loc Precision
Rocket kits.
Call or email us for multi-pack pricing.
E-MAIL: info@locprecision.com
PHONE: 920.892.0557
1979/RAM 1.9/12-24-21
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