Tim Kearsley Posted July 24, 2017 Share Posted July 24, 2017 I'm assembling a Hangar 9 Spitfire (the 30cc ARTF) and, having taken the electric route, I'm using an Eflite Power 160 to supply the urge. The prop adapters supplied with the motor are for a 12 mm shaft. This seems extremely large to me, not having built anything quite so large before. I'm planning on running an 18 X 8 prop (or thereabouts, depending on current draw) - can such a prop be safely reamed out to take a 12 mm shaft? If so, are 12 mil reamers available? Sorry if these are daft questions, but I've not met such a shaft diameter before! Thanks, Tim. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted July 24, 2017 Share Posted July 24, 2017 When you think Tim, a small .40 IC transfers a much smaller amount of power through a 10mm nut A 12mm shaft on such a powerful motor becomes logical A 18" boss would more easily drill out at 12mm, than sloping ream Quote Link to comment Share on other sites More sharing options...
Don Fry Posted July 24, 2017 Share Posted July 24, 2017 My Laser 180 is a 10mm shaft. So 12 is reasonable. And yes such reamers are available. Mine came from Inwood's. Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted July 24, 2017 Share Posted July 24, 2017 Tim, as Denis says no problem for an 18" dia prop, I've got a slightly less powerful setup ( not a Spitfire and 1.8kw equivalent to a 26 cc petrol) turning a 18 x 6 prop on a 10mm shaft, I just checked a couple of spare props and the recess is 12.5 to 13mm dia so they can be reamed out to this quite safely. Mine is on an 8s set up (pulls about 70 amps), I use the Jeti antispark connectors for the final hook up and they work great. Quote Link to comment Share on other sites More sharing options...
Tim Kearsley Posted July 24, 2017 Author Share Posted July 24, 2017 Thank you very much chaps, you've eased my mind. Interested to hear you've used the Jeti anti-spark connectors Frank, I too am planning on using them. I am planning a 12s setup, running around 60A max, so the potential for a BIG spark is there! Tim. Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted July 25, 2017 Share Posted July 25, 2017 I use them on 6s and above, the crack when they spark without them makes me jump Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted July 25, 2017 Share Posted July 25, 2017 My Laser 180 uses a 1/2" sleeve nut to enable an alloy spinner to be used. It is not the latest version which I believe is now all metric. I enlarge the prop holes a little at a time on my drill press then use a tapered reamer from the rear to finish off because 1/2" drills are not easy to come by. Had no problems. Quote Link to comment Share on other sites More sharing options...
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