Maxi Alpha 3

Ez3D Maxi Alpha 3

• Ever want to bring back an out-of-production favorite? Just press print!
• This version fits the LOC 2.14 body tube (https://locprecision.com/products/cardboard-airframes?variant=39778656059583)

Parts List:

1. Ez3D Maxi Alpha 3 Fin Can
2. Maxi Alpha 3 Nose cone - TOP and BASE
3. Special 3D printed Motor Retainer Cap
4. M2 Screws

• This set from Amazon has plenty: "500pcs M2 M2.5 M3 Laptop Notebook Computer Replacement Screws Kit, PC Flat Head Phillips Screw Assortments, Countersunk SSD Electronic Repair Accessories for Sony DELL Samsung IBM HP Toshiba"

1. Twenty Two (22) inches of LOC 2.14 cardboard airframe (tube cutting guide included)
2. Six (6) feet of Kevlar string for Recovery Harness
   • Flight tested on 9KM DWLIFE Black Braided Kevlar Cord (1.3mm, 300 lb) but others may work
3. Two 1010 Rail Buttons
4. 24" parachute

Assembly:

1. 3D print the "LOC2.14 tube cutter guide"

• Use this to cut a LOC 2.14 tube to 22 inches

1. 3D print the "MA3 Tube Cutting Template"

• Use this to mark and cut out the fin slots on the body tube
• Can also be used to mark where to drill small holes for the attachment screws

1. Tie Recovery Harness to hole in Fin Can
2. Thread Recovery Harness thru Body Tube
3. Slide Body Tube onto top of Fin Can
   • Align the fin slots with the fins
4. Attach body tube with the screws

• Designed for two rows of nine screws but other configurations may also work

1. Tie loose end of Recovery Harness to Nose Cone BASE

• Nose cone TOP twists onto the BASE

1. Tie parachute to Recovery Harness near top of Nose Cone
2. Attach two 1010 rail buttons

NOTE: Individual printers and filament have different tolerances

- Fit check items before assembly. Options to adjust if necessary:

• Add tape to increase diameter
• Remove material by sanding
• If your printer has a scaling feature, use it to adjust the part size
• Change the dimensions in the FreeCAD file available with the download

IMPORTANT POST FLIGHT NOTES:

• 3D printed material shrinks after cooling down from heat of motor
  • I have only flow an ABS version with Estes motor and had no problems removing the motor. Not sure how many flights a PLA version will last before the motor tube shrinks.

Flight Test Info:

2025-09-09 E16-4 (33 Ns), 550g, 600 ft* (May not be accurate - no vent holes), 4 sec a little short?*
2025-09-09 F15-6 (50 Ns), 550g, 598 ft* (May not be accurate - no vent holes), 6 sec a little long? Very slow liftoff*
2025-10-04 F15-4 (50Ns), 525g, 680 ft (Missile Meter) / 674 ft (JLogic Alt1)
2025-10-24 F50-6 (77 Ns), 525g, 1200 ft (JLogic Alt2)
2025-10-26 G78-7G (110 Ns), 585g, 1817 ft (JLogic Alt 1), Lower part of fins broke due to flutter about 500ft (?) up. Still stable so kept on going!

2026-07-11 F62-6FJ (48 Ns), 540g, 779 ft (JLogic Alt2) - Used new 24 to 29 Motor Adapter Base Thrust Ring