RATTWorks 29mm Hybrid Experimental Motor

See also my general Hybrid Experimental Motor page as well as my pages specific to projects such as
Propulsion Polymers 38mm Experimental Hybrid Project, and my 54mm HyperTEK Experimental Hybrid Project.

Motor Tubing ID 1.050"
Aft Closure Nozzle Exit ID 0.623"

Floating Injector OD 1.050
Floating Injector Pipe Shoulder OD 0.745
Floating Injector grain shoulder length 0.350" with one #xx o-ring groove in the middle

Fuel grain is 5.965" long; appears to be turned down stock and OD is 0.995; ID is 0.70; this matches SCH 80 PVC at 1.050 OD 0.704 ID

Nozzle recess is 0.3" long 0.75" diameter and Injector / preheater recess is 1.2" long x 7.75" diameter.

Nozzle itself has 0.275" throat and fits into the grain nozzle recess area partially and the remainder is supported by a cardboard insulation ring.

3/4" PVC is 1.050" OD, so should just fit.
SCH 40 ID is .810 and SCH 80 .724

so SCH 40 may just work.

But the RATT grain looks milled on the outside, and is milled on the inside. Making me wonder if it's milled SCH 80 perhaps. If so then modifications may be necessary to injector OR perhaps SCH 40 might fly on a smaller motor (H or I injectors) as I've noted minimal regression on my H-70 burns.