Question: I have a VMAX #VMM-111B18VM VMAX Brushless Motor. What prop adapter works on this motor?
Answer: There are a several options for this depending on the prop that you are using.
Please note that the motor comes with a long threaded shaft that is .118 in. (3 mm) in diameter. We sell a prop nuts and washer set (#VMM-111B18PN) that contains an assortment of nuts, safety nuts and washers suitable for mounting most suitable props on this shaft. Please note that if you bought a VMAR Power Module or Power Pack for your model the appropriate nuts, safety nuts and washers and prop are already included. Method A, B and C described below utilize the prop nuts and washer set #VMM-111B18PN.
Method A: This is applicable to the older version of Master Airscrew #MAS-0850NE prop that has a recessed hex shaped hole in the back of the prop. No collets come with this older version of the 0850NE prop to adapt the prop to fit different shaft sizes.
For installation of this older style of #MAS-0850NE prop, we recommend the following order of components working from the motor out towards the tip of the shaft : Motor > Nut > Washer > Nut > Nut > Prop > Washer > Safety Nut. The idea here is that the pair of two hex nuts (Nut > Nut) insert themselves into the recess in the back of the prop.
Method B: This is similar to Method A but uses a Safety Nut instead of the pair of two hex nuts. Working from the motor out towards the tip of the shaft install the following components: Motor > Nut > Washer > Safety Nut (hex end towards prop) > Prop > Washer > Safety Nut. The idea here is that the hex end of the first Safety Nut inserts itself into the recess in the back of the prop.
Method C: This is applicable to the newer version of Master Airscrew #MAS-0850NE prop that has a recessed hole in the back of the prop that works with a collet suitable for the motor shaft size. A selection of collets with different internal hole diameters is provided with the prop. Working from the motor out towards the tip of the shaft install the following components:
Motor > Nut > Washer > Collett and Prop > Washer > Safety Nut. The idea here is that the Collett and Prop are cinched between the two washers.
Method D: Use a conventional squish type 3 or 4 segment prop adapter suitable for the motor shaft size referenced above.
To use such an adapter measure the motor shaft length that you require for your application (i.e. it must fit in your model and clear the front of the model and/or cowl) and then cut off the excess shaft length. In general you use the fasteners that come with the segmented prop adapter.
CAUTION: When mounting props using any method, ensure all hardware and fasteners are tightened securely. Check for wobble free rotation of the prop and motor. If not wobble free, loosen the prop, reseat it and tighten securely. Tighten the nuts firmly but don't strip the threads.
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