Just received this spinner and it is indeed a a regular 2 blade spinner.The center hole on the back plate measures 3/8.It does come with a 1/4"I.D alloy back plate insert which allows you to use this spinner with 1/4-28 crank shafts only.
I have an FMS Cessna 182 1410mm. The brushless motor has a 4mm threaded shaft. So I wish to ask whether this would fit my motor shaft or I would have to buy something else to make it work taking into consideration that it has this setup -> The backplate of the prop spinner that comes with this model has an M4 nut slot at the back (Picture attached) i.e. the backplate fits onto the M4 nut (tightened on the motor shaft) at the back, then you place an SF E-Prop 11x4.7 propeller onto the shaft and tighten it with another M4 nut and finally put the spinner cap on top of it with 2 screws.
The description is ABSOLUTELY wrong. A folding prop spinner needs to carry 2 or more flanges (depending on the number of blades) with a hole drilled through for attaching the blades. This is a conventional 2 blade spinner with a 4mm socket head bolt for attaching to the aircraft.
this prop spinner has a UNF1/4-28 adapter to fit most 46 size nitro motors you will need a prop adapter for the 5mm shaft any way, so try to get one with UNF1/4-28 and it will fit fine. hope this helps Cheers
This is the only aluminum spinner spelled the American way - all the rest are spelled aluminIUM - the British way. No big deal other than it was difficult to find using the search feature of the website.
total weight installed is about 50 grams. Plastic spinners are about 30 grams. Mainly bought for looks and to i needed more nose weight. Easier to use than plastic spinners too. Very professional. Prop nut does fit a os 55ax, 46ax and similar so you don't need to get another one.
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1 thumbs up!
Fit like a glove. Master Airscrew 11x7 prop fits perfectly & the SK35-42 shaft (4mm) snugs right up.