For the complete documentation index, see llms.txt. This page is also available as Markdown.
Replacing Propellers
Ensure rotation direction is correct. Always replace propellers with a set intended to rotate in the same direction (clockwise or counter-clockwise). We suggest replacing one propeller assembly at a time to minimize potential for mix-ups, rather than removing all propellers at once.
Always replace both propeller blades as a set. They are a matched and balanced pair, with matching serial numbers. This is to reduce vibration.
Astro vs Astro Max Motors
Before you consider replacing props, it is important to identify the which Astro motors you have.
The Astro is equipped with Freefly F45 motors, where the Astro Max has a newer Freefly 7010 motor.
In addition to providing more thrust than the prior generation motor, the Astro Max 7010 motors have a different mounting pattern for props than the F45 motor. Reference the image below to identify which one you have.
Identifying your current props
Legacy props are 21" long and marked with "2170".
High efficiency props are 22" long, and marked with "2270".
Example of a 2270 CCW prop:
Which props do I need?
Since we no longer sell the 21" (2170) props, we only carry the high-efficiency 22" (2270) props.
Depending on the motor you have, the 22" props will come with the appropriate mounting hardware.
If you have the Astro with F45 motors, you have the legacy Astro and will need to get the Astro Legacy Spare Props (2270)
If you have the Astro with 7010 motors, you have Astro Max, and will need to get the Astro Max Spare Props (2270)
How many props do I need?
If you want to upgrade your legacy Astro (F45 motors) to maximize flight time, you'll need to purchase two sets of the 2270 props. We recommend a third set to have a spare set in your kit.
If you just need a replacement prop (CW or CCW) and have 21" props on your Astro marked with "2170" on the blade, you'll need to purchase two sets of the 2270 props so you can replace the props on all four motors.
If your Astro already has 22" props marked with "2270" on the blade, just purchase what you feel comfortable having for spares. Most people have one set (one each CW & CCW) in their kit.
Steps to replace props on legacy Astro (F45 motors)
Remove fasteners between the prop hub and the motors: (x4) M3x10 bolts.
Remove the old propeller assembly.
Fit the new propeller assembly.
Apply Loctite 243 or equivalent to all screws before installing. torque to 1.5 Newton meters.
Reinstall (x4) M3x8 bolts.
Propellers are labelled with their orientation, Clockwise (CW) or Counter-clockwise (CCW).
The correct direction of the propellers is shown below. Please note the arrow indicating the front of the Astro, which is easily identified by the cylindrical antenna.
Prop Tension
Each blade of the propeller assembly should move freely with a small amount of resistance. It should not be difficult to fold the prop manually, and the force of gravity should be enough to pivot the blade at the bolt if the aircraft is rotated.
