Semroc Motor Mounts
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SLS Laser-X Motor Mounts
Dual Engine Mount is designed to convert the SLS
Laser-X into a dual 24 mm (Estes D and E) engine
powered rocket. Simply assemble, insert into SLS
Laser-X, and twist into place. Kit contains two
engine mount tubes for .950" (24mm) x 3.75" (95
mm) engine, two centering rings for Series #225
body tubes, thrust rings, engine hooks, and engine
spacers with full instructions.
Retail 7.00 Buy It Now 6.65

Quad Engine Mount is designed to convert the SLS
Laser-X into a quad 18 mm standard engine powered
rocket. Simply assemble, insert into SLS Laser-X,
and twist into place. Kit contains four engine mount
tubes for .690" (18mm) x 2.75" (70 mm) engines,
two centering rings for Series #225 body tubes,
thrust rings, adapter tube, coolant fins, and engine
hooks with full instructions.
Retail 9.00 Buy It Now 8.55

Motor Hooks
A motor hook is used to positively retain the model rocket motor in the body tube or
motor mount tube, but allow for the easy removal of the casing at the end of the flight.

Mini "13mm"
13mm Motor Hook 1.75"
.55 Each

Large "E"
24mm Motor Hook  3.75"
.75 Each

Standard "A,B,C &D"
18/24mm Motor Hook  2.75"
.65 Each

Standard "A,B,C &D"
18/24mm Motor Hook  2.75"
Pack Of 10
Buy It Now
4.00

For increased value we now offer a 10 pack
of our standard 18/24mm 2.75" motor hooks.
Motor Block And Thrust Rings
Other Engine Mount Accessories
Motor Mount Tube
For 24MM Motors
Our motor mount tubes are manufactured
to be exact replacements.
Fits Standard Body Tubes
Designed To Be Exact Replacements
Very High Quality Material
24mm Diameter
Motor Mount Tube for 18MM
Motors
Our motor mount tubes are manufactured
to be exact replacements.
Fits Standard Body Tubes
Designed To Be Exact Replacements
Very High Quality Material
18mm Diameter
Motor Mount Tube for 13MM
Motors
Our motor mount tubes are manufactured
to be exact replacements.
Fits Standard Body Tubes
Designed To Be Exact Replacements
Very High Quality Material
13mm Diameter
2.75" Long (D)
Retail Price
.50

3.75" Long (E)
Retail Price
.60

2.75" Long
Retail Price
.40

1.75" Long
Retail Price
.30

Motor Mount Tubes
Centering Rings
BT50 to BT55
Package Of 10
Retail Price 3.00 Buy It Now
2.50

Motor Block/Thrust Ring
Used for preventing your motors from being inserted too far
forward in the motor tube. Perfect fit into a body tube. These make
great replacements for rebuilds, and are perfect for using in motor
mounts of scratch built kits. Manufactured in the U.S.A these are
the same high quality parts they use in commercial rocket kits.
They come packaged in multiples of 10 (29mm pack of 5) . So pick
up a few to throw in the parts box.

BT5, BT20 Or BT50
Retail Price 3.00 Buy It Now
2.50

Motor Block/Thrust Ring BT5
Package Of 10

Motor Block/Thrust Ring BT20
Package Of 10

Motor Block/Thrust Ring BT50
Package Of 10

5 Pack 29mm Engine Blocks
Pack of 5 for 29mm engines tubes

Retail Price 2.50 Buy It Now 2.00
Motor Block 29mm Tube
Package Of 5

Clip Whips
2 Motor Clip Whip
3 Motor Clip Whip
2 Engine Clip Whip
Retail Price 11.99
Buy It Now
11.39

3 Engine Clip Whip
Retail Price 14.99
Buy It Now
14.24

IMPORTANT: Anytime you are designing a cluster model or converting a model from single
motor to cluster motor use you need to verify the stability of your model before flight.
Adding more motors to the model increases the weight in the rear of the model moving the
Center of Gravity (CG) further back and may cause instability in your model. If you are
converting a known stable model, the easiest method to assure stability is to fully load the
unmodified model for flight (motor installed, recovery device, etc) and balance this model on
your finger. This balance point is the CG of your model and you should mark this. Then
install the cluster engine mount and prep your model for flight again. You will note that the
CG has moved towards the back of the model. Add nose weight to the nose cone until you
have moved the CG back to its original point. If you are designing your own model you
should make yourself aware of model rocket stability and the relationships between the
Center of Gravity and the Center of Pressure and how to measure both.
Empty Motor Casing 18mm
Package Of 6
Buy It Now
1.00

Empty Engine Casings