Bulkhead Motor Retainers for Minimum Diameter Rockets

Bottom view of 38mm thru 98mm retainers with stainless steel motor mounting studs

Top view of 38mm thru 98mm retainers with threaded holes for accessory mounting

Top view of 38mm thru 98mm retainers with optional stainless steel eye-bolts

• For 38mm Thru 98mm Airframes Or Motor Mount Tubes
• Offers Fast, Clean, Tape-Free And Tool-Free Motor Change
• Made from Precision Machined Aluminum, Red Anodized
• Nothing Protrudes Beyond Airframe Outside Diameter
• Retainer Is Bonded Inside Airframe Above Motor
• Requires Forward Closures With Threaded Hole
• Simply Screw Motor Onto Stud On Bulkhead Retainer
• Aft-Closure Or Snap-Ring Seats Against End Of Airframe
• Threaded Hole On Forward End For Accessory Mounting
• Optional Eye-Bolt Attached To Forward End Of Bulkhead
• Optional Extension Couplers For Flying Shorter Motors

Part Numbers and Descriptions:

M38: for 38mm airframe and motor mount tubing
Motor mounting stud on bottom of retainer is 5/16-18.
Accessory mounting hole on top of retainer is threaded 10-24.
M38E includes a 3/16 inch welded eye-bolt.

M54: for 54mm airframe and motor mount tubing
Motor mounting stud on bottom of retainer is 5/16-18.
Accessory mounting hole on top of retainer is threaded 10-24.
M54E includes a 3/16 inch welded eye-bolt.

M75: for 75mm airframe and motor mount tubing
Motor mounting stud on bottom of retainer is 3/8-16.
Accessory mounting hole on top of retainer is threaded ¼-20.
M75E includes a ¼ inch machine eye-bolt.

M98: for 98mm airframe and motor mount tubing
Motor mounting stud on bottom of retainer is 3/8-16.
Accessory mounting hole on top of retainer is threaded 5/16-18.
M98E includes a 5/16 inch machine eye-bolt.

M54 on AeroTech 54mm motor with RouseTech threaded forward closure	M54 on Cesaroni Pro54 motor with MC54 forward closure adapter	M98 on Dr Rocket 98mm motor with Dr Rocket threaded forward closure

Compatibility:
M75 and M98 have a 3/8-16 stud. The following motors either come with a 3/8-16 threaded hole in the forward closure or are available with a forward closure having a 3/8-16 threaded hole:
AeroTech, AMW, Cesaroni Pro75 and Pro98, Gorilla, Dr Rocket, Loki, RouseTech Monster Motors

M38 and M54 have a 5/16-18 stud. The following motors either come with a 5/16-18 threaded hole in the forward closure or an adapter is available from Aero Pack to match the 5/16-18 stud size:
AeroTech, AMW, Cesaroni Pro38 and Pro54, Gorilla, Dr Rocket, Loki, RouseTech Monster Motors

Contact us if you have a forward closure with a different hole thread size.

M54 in Performance Rocketry Carbon-Fiber Mongoose 54 airframe booster section

Coming Soon:
5/16-18 adapters for Cesaroni Pro38 and Pro54 forward closures.
5/16-18 and 3/8-16 extensions and extension sets for flying shorter motors.

5/16-18 extension set	Extension between M54 and 54mm fwd closure