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RATTworks: Precision Hybrid & Tribrid Rocket Motors RATTworks: Precision Hybrid & Tribrid Rocket Motors
64mm Hybrid Motors

The K240, L600, and M900 hybrids are certified by the Tripoli Rocketry Association


64mm motor comparison

K240 hybrid

A size comparison of three motors (left to right) - AeroTech K700, RATTworks K240, and AeroTech M1315. Note: The K240 motor casing includes both the combustion chamber and the oxidizer tank, whereas an AeroTech motor does not require an oxidizer tank.

K240 Hybrid Motor Casing  $250.00
K240 Reload $40.00

K240 Assembly Instructions (4,857 KB PDF)

Videos of K240 hybrid motor flights - courtesy of Pratt Hobbies.
Rattworks K240 hybrid movie #1
725 KB
352 x 240
00:17 MPEG
  Rattworks K240 hybrid movie #2
1,079 KB
352 x 240
00:26 MPEG
  Rattworks K240 hybrid movie #3
255 KB
160 x 112
00:14 MPEG
Thrust curve - click to enlarge

K240 thrust curve

Designation: K240
Diameter: 2.5" (64 mm)
Length: 35.75" (908 mm)
Average Thrust: 51.5 lbs. (229.0 N)
Peak Thrust: 124.3 lbs. (553.1 N)
ISP: 145.4 sec.
Burn Time: 8.05 sec.
Weight (Empty): 1304 g
Weight (Loaded w/o N2O): 1621 g
Weight (Loaded w/ N2O): 2838.6 g
N2O Weight (750 PSI): 2.682 lbs. (1217.6 g)
Tank Volume: 99.7ci (1633.8cc)

L600 hybrid rocket motor

L600/M900 hybrid set

The L600 and M900 hybrid motor casings are sold as a combo set. A tank extension threads onto the L600 casing to create the M900 casing. Shown at left is the L600 casing.

L600/M900 Hybrid Motor Casing Set  $375.00
L600 Reload $70.00
M900 Reload $85.00

L600/M900 Assembly Instructions (593 KB PDF)

M900 hybrid rocket motor
A minimum diameter rocket powered by
an M900 ascends to 26,000 feet.
M900 hybrid flight
139 KB
480 x 640
Thrust curve - click to enlarge

L600 hybrid thrust curve

Designation: L600
Diameter: 2.5" (64 mm)
Length: 42" (1066 mm)
Average Thrust: 639.4 N
Peak Thrust: 2071.7 N
ISP: 170 sec.
Burn Time: 7.1 sec.
Weight (Initial): 2200 g
Weight (Recovery): 2064 g
Tank Volume: 1858 cc

Thrust curve - click to enlarge

M600 hybrid thrust curve

Designation: M900
Diameter: 2.5" (64 mm)
Length: 72" (1828 mm)
Average Thrust: 626.5 N
Peak Thrust: 1945.28 N
ISP: 170 sec.
Burn Time: 12.3 sec.
Weight (Initial): 3288 g
Weight (Recovery): 2789 g
Tank Volume: 3716 cc

All Ratt motors (ThrustCurve.org)


RATTworks: Precision Hybrid & Tribrid Rocket Motors RATTworks: Precision Hybrid & Tribrid Rocket Motors
RATTworks: Precision Hybrid & Tribrid Rocket Motors