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Genesis of LMR & HPR.

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38mm RELOADABLE MOTORS
Aluminum reloadable casings. Propellant cartridges
to fit for multiple reuse. Increased labor but lower
cost than expendables. Only standard coreburning grain
geometry type motor loads available.




38mm assortment with 120, 240, 480 cases and a closure to share.
Shows propellant, nozzles, delay, liners and closure o-rings.
Most common now are white paper liners and blue closures.


38mm 480 reload kit. It's simple. Propellant, nozzle, delay, delay o-ring, and liner.
You put a little grease on the OD of the delay and on the little o-ring.
Most common now are white propellant casting and thermal liners.


The system.


U.S. Rockets R&R Reloadable motor system with casing, closures,
propellant, delay, thermal liner, and nozzle. The rear closure has
an integral thrust ring and the forward closure can be plugged or
have a user modifiable delay. Reusable closures and expendable
propellant reloads are compatible with the "other" brand
casings in the market. 240 N-s power systems are the largest
FAA exempt motors, being under 125 grams propellant.

Our system has fewer parts, fewer leak points, uses less grease, is more
suitable for assembly in cold weather or for folks with fat fingers or
gloves on, and allows reuse of the nozzle in many instances. Users
who save superior quality used U.S. Rockets brand nozzles,
repurpose them for use with our "propellant bulk packs".





Casings and Closures
DescriptionItem#Cost EaCasing &
Closure Sets
38mm closure set1-38-closure set49.95--
38mm bulkhead end1-38-bulkhead25.00--
38mm 120 N-s case38-120case 1 grain40.0090.00
38mm 240 N-s case38-240case 2 grain40.0090.00
38mm 360 N-s case38-360case 3 grain40.0090.00
38mm 480 N-s case38-480case 4 grain42.0090.00
38mm 600 N-s case38-600case 5 grain44.0090.00
38mm 720 N-s case38-720case 6 grain
3 long grains
46.0095.00
38mm 960 N-s case38-960case 8 grain
4 long grains
50.0099.00
38mm 1200 N-s case38-1200case 10 grain
5 long grains
55.00104.00
38mm 1440 N-s case38-1440case 12 grain
6 long grains
60.00109.00
First purchase CLOSURE SET includes nozzle holder end closure, delay holder
end closure, spare o-rings, instructions. All other parts are separate
components for replacement or special applications. Nozzle closure has
positive seal in two places and recommended nozzle (included in reload
packs) is reuseable at least three times. Bulkhead closure has positive
seal in two places and standard friction fit delay element with expendable
o-ring seal. Closure accepts small quantities of ejection powder in the
well and 1/4g to 3/8g is recommended for MR and LMR respectively. 1/2g is
recommended for typical HPR rockets. Liner ejection tool (wood dowel) aids
removal of paper liners which have been damaged by long duration propellant
loads thus protecting the valuable casing system. Extra o-rings are included
for replacement as they become damaged during normal usage. In particular
the nozzle o-ring can be damaged by installation of nozzles so bevel the
nozzle edge slightly with sandpaper to increase seal life. Grain count is
nominal. Longer motors use fewer double length grains (6 grain 720 uses 3
double length grains).



Complete System 38mm reloadable motor and grains.
Our 38mm closure kit - outside view
Our 38mm closure kit - inside view
Our 38mm 480 N-s reload kit
38mm 480 N-s 2 pack reload package
Our 38mm 480 N-s Complete system - horizontal
Our 38mm 480 N-s Complete system - vertical
Our 38mm 480 N-s Complete assembled system
Our 38mm 480 N-s Complete assembled system



A variety of 38mm systems, assortments and views.

7" 62g delay sticks


Delay units and times
System type for
all grain lengths
Delay
Length
Delay Time
(sec)
38mm STD
38mm F
38mm BK
7/16" 4
5
6
38mm STD
38mm F
38mm BK
9/16" 8
9
10
38mm STD
38mm F
38mm BK
38mm WS
11/16" 12
15
14
4
38mm STD
38mm F
38mm BK
38mm WS
38mm FS
13/16" 16
17
18
8
2
38mm STD
38mm F
38mm BK
38mm WS
38mm FS
16/16" 22
23
24
14
8
38mm WS
38mm FS
18/16" 18
12
Closure has positive seal in one place and standard friction fit
delay element. Closure accepts small quantities of ejection
powder in the well and 1/4g to 3/8g is recommended. Delay needs to
be a tight (interference) fit. If loose add a FLAT layer of clear
tape to the outside surface until it is a tight fit. Closure edge
is slightly beveled to allow insertion and the delay should be a
clean smooth edge. Debur the end circumference as needed by rubbing
on a smooth surface such as glass.

PROPELLANT STYLES

Firestarter (amber), Whitestar (silver), Standard (brown), Fast (orange), Buttkicker (black)



38mm - 1.5 inch - R&R Motor Reloads
38mm 120 Newton-second Reloads
1 60g grains
Motor TypeThrust
Pounds
TimePropellant 4-pack Cost
120H26-FS6.04.5Firestarter53.95
120H40-WS9.03.0Whitestar47.95
120H45-STD10.02.7Standard47.95
120H80-F18.01.5Fast47.95
120H150-BK33.70.8Buttkicker53.95
38mm 240 Newton-second Reloads
2 60g grains
Motor TypeThrust
Pounds
TimePropellant 4-pack Cost
240H53-FS
images
12.04.5Firestarter105.95
240H80-WS18.03.0Whitestar95.95
240H89-STD
images
20.02.7Standard95.95
240H160-F36.01.5Fast95.95
240H300-BK
images
67.40.8Buttkicker105.95
38mm 360 Newton-second Reloads
3 60g grains
Motor TypeThrust
Pounds
TimePropellant 4-pack Cost
360H78-FS
images
18.04.5Firestarter158.95
360H120-WS27.03.0Whitestar144.95
360H135-FFS30.02.7Fasterstarter158.95
360H135-STD30.02.7Standard144.95
360H240-F54.01.5Fast144.95
360H450-BK
images
910.8Buttkicker158.95
38mm 480 Newton-second Reloads
4 60g grains or optional 2 120g grains
Motor TypeThrustTimePropellant 4-pack Cost
480I105-FS24.04.5Firestarter213.95
480I160-WS36.03.0Whitestar193.95
480I180-FFS40.02.7Fasterstarter213.95
480I180-STD
images
40.02.7Standard193.95
480I320-F
images
72.01.5Fast193.95
480I600-BK134.80.8Buttkicker213.95
38mm 600 Newton-second Reloads
5 60g grains or optional 2 120g and 1 60g grains
Motor TypeThrustTimePropellant 2-pack Cost
600I130-FS30.04.5Firestarter132.95
600I200-WS45.03.0Whitestar120.95
600I225-FFS50.02.7Fasterstarter132.95
600I225-STD50.02.7Standard120.95
600I400-F90.01.5Fast120.95
600I750-BK1680.8Buttkicker132.95
38mm 720 Newton-second Reloads
6 60g grains or 3 120g grains
Motor TypeThrustTimePropellant 2-pack Cost
720J160-FS36.04.5Firestarter157.95
720J240-WS55.03.0Whitestar143.95
720J270-FFS60.02.7Fasterstarter157.95
720J270-STD60.02.7Standard143.95
720J480-F108.01.5Fast143.95
720J900-BK202.20.8Buttkicker157.95
38mm 960 Newton-second Reloads
4 120g grains
Motor TypeThrustTimePropellant 2-pack Cost
960J210-FS48.04.5Firestarter203.95
960J320-WS72.03.0Whitestar193.95
960J360-FFS80.02.7Fasterstarter203.95
960J360-STD80.02.7Standard193.95
960J640-F144.01.5Fast193.95
960J1200-BK269.80.8Buttkicker203.95
38mm 1200 Newton-second Reloads
5 120g grains
Motor TypeThrustTimePropellant 2-pack Cost
1200J262-FS60.04.5Firestarter254.95
1200J400-WS90.03.0Whitestar239.95
1200J450-FFS100.02.7Fasterstarter254.95
38mm 1440 Newton-second Reloads
6 120g grains
Motor TypeThrustTimePropellant 2-pack Cost
1440K393-FS90.04.5Firestarter304.95
1440K480-WS108.03.0Whitestar289.95
1440K675-FFS150.02.7Fasterstarter304.95
Includes propellant, delay, liner, nozzle, instructions. Consumer provides
ejection powder FFF, igniter, rocket, launch pad and excitement! Bulk packs
of 12 each available at 10% discount. Ask your dealer to stock our reloads
and closures which are compatible with all popular casings.
Our closures and loads, their casings. You can buy grain spacers which
allows a smaller number of casings to be used for more reload sizes.
LT-38-1.75. Also LT-29-1.75 and LT-24-2 in bags of 12 for $6.00.


Slide show of a smaller Fasterstarter Propellant Combination flight. 124kb





Try one of the more innovative and exciting motor systems around.

A 38mm 240 case and associated Standard load produces almost 20
pounds of thrust for almost 2.7 seconds. You can get a case system
and four loads for around $90 + $96 MSRP. This is an FAA exempt
propellant weight. About 25 bucks a flight and suitable for small
fields with a 4 inch rocket. The 240 N-s power H89 for $25 ($0.104/N-s)
compares favorably with the $5 Estes 27 N-s E9 ($0.185/ N-s).

A 38mm 480 case and associated Standard load produces almost 40
pounds of thrust for almost 2.7 seconds. You can get a case system
and four loads for around $90 + $194 MSRP. Use in a 3 or 4 inch rocket.

A 38mm 960 case and associated Whitestar load produces almost 72
pounds of thrust for almost 3 seconds. You can get a case system
and two loads for around $100 + $194 MSRP. Use in a 3, 4, or 6 inch rocket.

A 38mm 1440 case and associated Whitestar load produces almost 108
pounds of thrust for almost 3 seconds. You can get a case system
and two loads for around $100 + $290 MSRP. Use in a 3, 4, or 6 inch rocket.

Motor systems up to 240 have under the FAA exempt propellant weight.


Testimonials and Product usage
U.S. Rockets Firestarter propellant

Your Firestarters are still by far the best sparky motors I have ever had the pleasure to use, especially the bigger ones.
__________________
Jim Scarpine
TRA 1377/NAR 51510
Tripoli NC
L3


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