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Pro75® Instructions, July 2015 revision 

Pro75

®

 

 

High-Power Reloadable Rocket Motor Systems 

 

FOR USE ONLY BY CERTIFIED HIGH-POWER ROCKETRY USERS 18 YEARS OF AGE OR OLDER 

 

FLAMMABLE MATERIAL – KEEP AWAY FROM OPEN FLAME, CIGARETTES OR OTHER HEAT SOURCES AT ALL TIMES

 

 

 

USE WITHIN 1 YEAR OF MANUFACTURING DATE 

 

 

                               TEMPERATURE RANGE: -5 to 30°C 

 

Read this BEFORE you start assembly: 

 

 

If you have any questions or require assistance, please contact your dealer. If you are unable to resolve your questions or 
problems then please contact the manufacturer directly. Assistance is available Mon – Fri. 9am – 4:30pm at (905) 887-2370. 
Ask for ProXX motor products technical support. 

 

Read all instructions carefully and be sure you fully understand each step before proceeding with motor assembly. 

 

Make sure to also read the Pro75 Product Notes for reload specific instructions. Your reload may require bonding of grains 
into the case liner. For moonburner reloads there are also separate moonburner instructions for gluing the grains. 

 

Inspect the components of your reload kit carefully before you start assembly. DO NOT use any parts that appear damaged or 
faulty in any way. 

 

Do not tamper with or modify the hardware or reload kit components in any way. Not only will this void all product warranty, 
it could cause catastrophic failure of your motor system and result in damage to your rocket vehicle, launch equipment and 
create a hazard to persons or property. 

 

Reload kit components are designed for ONE USE ONLY, and may not be reused. Reuse of any of these components could 
result in motor failure and will void product warranty. 

 

Follow the safety code and all rules and regulations of your sport rocketry association. Also ensure that you are in compliance 
with all local, state/provincial, and Federal laws in all activities involving high power rockets and rocket motors.

 

 

Parts checklist: 

 

Summary of Contents for Pro75

Page 1: ...fic instructions Your reload may require bonding of grains into the case liner For moonburner reloads there are also separate moonburner instructions for gluing the grains Inspect the components of your reload kit carefully before you start assembly DO NOT use any parts that appear damaged or faulty in any way Do not tamper with or modify the hardware or reload kit components in any way Not only w...

Page 2: ...r otherwise damaged by excessive force or impact Please be careful during handling and assembly If you suspect a part has been damaged in any way STOP and do not proceed with assembly and especially firing until inspected and replaced if necessary 1 Forward Closure Assembly 1 1 Apply a light coating of o ring lubricant or grease to the inside of the cavity in the forward closure Insert the smoke t...

Page 3: ...the second grain push it in a short ways then add another grain spacer and so on until you have loaded all propellant grains into the case liner 2 5 1 There should be sufficient space after the last grain is inserted to fit the last spacer in place so that it is flush or extends only slightly from the end of the tube If it extends out by more than 1 3 of its own thickness remove it and do not use ...

Page 4: ... so unscrew the nozzle retaining ring another half turn and screw the forward closure retainer in further NOTE it is best to have the forward closure retaining ring flush or slightly submerged and the nozzle retaining ring protruding by a half turn or so than vice versa There is more tolerance for o ring location at the nozzle end There will always be some minor variation in the length of internal...

Page 5: ...n place 3 7 Place one of the larger pre lubricated o rings from the P75 ORK kit into the forward end of the case until it is seated against the forward insulator 3 8 Thread the completed forward closure into the forward end of the motor case by hand until it is seated against the case NOTE There will be considerable resistance to threading in the closure in the last 1 8 to 3 16 of travel due to co...

Page 6: ...oat of grease or o ring lubricant to all threaded sections and reassemble threaded components for storage MEANS OF DISPOSAL The propellant grains smoke tracking charge and the igniter are extremely flammable and burn with an intense hot flame The remainder of the components are inert and may be disposed of with household trash To destroy the flammable components dig a shallow hole in the ground in...

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