Rattworks TriBrid Nitrous/Alcohol Bipropellant Rocket Motor

Components of the RATTWorks Silver Bullet Tribrid motor are:

Motor casing and oxidizer tank, one piece

Floating Injector

Alcohol Tank

Alcohol Piston

Alcohol Plug

Forward Bulkhead

Rear nozzle enclosure

O-Rings

Expendable components of the RATTWorks Tribrid (reload kit) are:

Phenolic liner

ABS fuel grain
  
Graphite nozzle
 
Fill hose (type H nylon) 

compression fittings

Each Tribrid Motor  includes 3 each of these expendables.

Get the full instruction sheet and further information on this motor here:

K350 Tribrid Assembly Instructions (4,857 KB PDF)

K350 Tribrid Thrust Curve (60KB PDF)

Silver Bullet 8 newsletter (20KB Word)

See how the Tribrid works:Tribrid Slideshow

TMT certifies new tribrid technology from RATTworks News Release by Tripoli Motor Testing Tuesday, May 18, 2010 We are very pleased to announce two new certified motors from RATTworks, Dave Griffith, head gas passer. The following motors are the first in a new technology of hybrid style motors developed by Mr. Griffith and authorized by the NFPA policy document 1125, 2007 edition. Click to enlarge Click to enlarge Enlarge In the top picture, a K-350 Tribrid is ready for a static test, while the bottom photo shows a K-600 Tribrid doing a manufacturer demo. MORE ON THIS STORY: Click to view RATTWorks interactive "Tri-brid" tutorial. These motors are called Tribrids, specifically for their ability to use both a nitrous oxide oxidizer, solid ABS grains, and now certified for the first time, liquid alcohol as fuels. Both of these motors are in RATTworks standard 2.5" (64 MM) case diameter, are of the K class, and once assembled, are no different from any other Urbanski/Colburn Monotube hybrid motor in external profile. The K350TR-P is a 45% K motor, 1861 total NS, 853 NS max (at the start of the Tri-propellant mode), a 463 N average and a 3.89 second burn time. The thrust profile is a typical hybrid profile, albeit with an atypical difference in the initial rise to about 120 pounds for about .1 seconds, then a transition to the Tribrid phase (alcohol introduction) for a second rise to 175 pounds. From there it is straight line regressive to the 3 second point and 100 pounds, where it enters vapor phase, dropping to 40 pounds. It then does a typical hybrid tail-off to zero at the 4.6 second point. The motor total weight (pre-nitrous) is 5.3 pounds with 290 ml alcohol (.645 lbs.), .115 lbs ABS grain weight, and 1170 cc of nitrous oxide capacity. Post weight is 4.54 lbs. The K600TR-P is a 70% K motor, a slightly longer and different (larger bore) injector version of the K350TR-P motor. It has 2170 total NS, 1223 NS max, a 561 N average and a 3.67 second burn time. The thrust profile is again a typical hybrid profile, the initial rise to about 170 pounds for about .1 seconds, then a transition to the Tribrid phase (alcohol introduction) for a second rise to 250 pounds. From there it is straight line regressive to the 2.2 second point and 150 pounds, where it enters vapor phase, dropping to 50 pounds. It then does a typical hybrid tail-off to zero at the 4.6 second point. The motor total weight (pre nitrous) is 6.55 pounds with 370 ml alcohol (.82 lbs.), .21 lbs ABS grain weight, and 1476 cc of nitrous oxide capacity. Post weight is 5.52 lbs. Congratulations to Dave Griffith and his development team for bringing this new technology to the membership and we wish them great success. Paul Holmes Chairman, Tripoli Motor Testing