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Description
Rattworks hybrid rocket motors are machined from 6061 T-6 aluminum and anodized for corrosion resistance.
The motor is considered a monocoque design in that the injector acts as the motor grain forward bulkhead as well as acting as the aft bulkhead for the nitrous tank.
Reload kits are available separately.
Components of a RATTWorks motor are:
Motor casing and oxidizer tank, one piece
Floating Injector
Forward Bulkhead
Rear nozzle enclosure
O-Rings
Expendable components of the RATTWorks motor (reload kit) are:
Polypropylene fuel grain
Graphite nozzle
Fill hose (type H 1/8" nylon)
1/16" compression fitting
Each reload kit includes 3 each of these expendables.
All these motors are works of art! They are well designed, exquisitely machined, and laser etched.
See how this motor works here, a graphic tutorial by Andrew MacMillen
H70 Motor Specifications:
Diameter: 29mm
Length: 18" (457mm)
Average Thrust: 15.4 lbs. (68.5 N)
Peak Thrust: 34.5 lbs. (153.5 N)
ISP: 167.3 sec.
Burn Time: 2.57 sec.
Weight (Empty): 207.5 g
Weight (Loaded w/o N2O): 251.5 g
Weight (Loaded w/ N2O): 352.7 g
N2O Weight (750 PSI): 0.223 lbs. (101.2 g)
Tank Volume: 8.29ci (135.8cc)
I80 Motor Specifications:
Diameter: 29mm
Length: 28.75" (730mm)
Average Thrust: 17.4 lbs. (77.4 N)
Peak Thrust: 36.6 lbs. (162.7 N)
ISP: 168.7 sec.
Burn Time: 4.73 sec.
Weight (Empty): 303 g
Weight (Loaded w/o N2O): 347 g
Weight (Loaded w/ N2O): 553.1 g
N2O Weight (750 PSI): 0.454 lbs. (206.1 g)
Tank Volume: 16.87ci (276.4cc)
I90 Motor Specifications:
Diameter: 29mm
Length: 36.25" (921mm)
Average Thrust: 17.0 lbs. (75.8 N)
Peak Thrust: 39.1 lbs. (174.1 N)
ISP: 170.7 sec.
Burn Time: 6.43 sec.
Weight (Empty): 366 g
Weight (Loaded w/o N2O): 425 g
Weight (Loaded w/ N2O): 694.2 g
N2O Weight (750 PSI): 0.593 lbs. (269.2 g)
Tank Volume: 22.05ci (361.3cc)
Get the full instruction sheet for this motor here:
Download instructions 960 k pdf
Take a look at a Ratt Reload tutorial here
Here's an interesting test firing:
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