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Oct 02, 2019, 09:43 PM
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Giant Coaxial Thrust Stand


This is Giant Coaxial Thrust Stand, designed for Extra Large Motors and Propellers,
- Single motor test,
- Coaxial motor test,
- Motor diameter up to 90mm,
- Top (left) propellers up to 32",
- Bottom (right) propellers up to 30",

I designed this Giant Rig for a friend, Joshua Carr from BuzzDrones, I will make a smaller version (up to 22" props) for myself later..

Safety is my priority, since this involved Dual Giant Propellers (bigger than my bicycle wheels) spinning at high RPM.
Total thrust (depend on motors and props combination) can exceed 15kg.
Initial design using a 20kg load cell on the top of aluminum stand, but I'm worry about the load cell strength,
if the load cell snaps, nothing can stop the giant propellers from flying around. I don't wanna see a funeral of my friend.
So I change the design, I need to make it strong and safe.

- 1.27x1.27mm square aluminum tubes (470mm 4pcs, 380mm 4pcs)
- 3.2mm MDF,
- 4.2mm MDF
- 3.4mm Plywood,
- 3.0mm Acrylic
- 10mm shaft (100mm long)
- 10x22x6mm bearing (4pcs)
- 10x35x11mm bearing (2pcs)
- 60mm M3 screws (18pcs)
- 50mm M3 screws (6pcs)
- 20mm M3 screws (8pcs)
- 15mm M3 screws (12)
- 20mm M4 screws (2pcs)
- Wood glue, CA glue.
- Black, clear lacquer, & clear doff paint.

- 50kg scale,
- 130A Watt meter,
- Servo tester with PWM display,
- Dual temperatur sensor with 2x 1m probes,
- Servo cable extension,
- Momentary switch,
- Cables, Terminals, etc..

I already cut the parts, will update the drawing & pics soon.
You can see how big the rig is compared to my old rig with 10" prop , here:
Last edited by ariaAQ; Oct 15, 2019 at 08:00 PM.
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Oct 02, 2019, 09:44 PM
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