Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

High rpm spinners

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Old 10-06-2014, 03:26 PM
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Bonified Wingnut
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Default High rpm spinners

I am wondering what spinners are good for 25,000 + rpms. I don't like the idea of one coming loose at that speed. What is everyone else using?
Thanks in advance
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Old 10-06-2014, 04:35 PM
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combatpigg
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Tru Turn spinners are the only ones I know of for the size range of engines I use.
Nelson FAI.40s come with a specially counterweighted spinner that effectively makes those engines externally balanced for 30,000+
I mention that just for trivia's sake, but it demonstrates that a perfectly balanced spinner might not be the best choice depending on application.
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Old 10-09-2014, 03:06 PM
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MJD
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And for little engines Brodak has a nice spun Al 1" spinner.
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Old 12-14-2014, 11:13 AM
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lfinney
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i have used truturn and dave brown spinners on K&B 3.5 engines for years,, static rpm was 25,500 usually..28 in the air..zero issues 2.25 and 2.5 inch
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Old 12-14-2014, 12:40 PM
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Bonified Wingnut
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Thank you. I think they are capable of more than they are rated for.
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Old 12-15-2014, 11:16 AM
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the race engines have a counter balanced spinner to off set the missing material in the crank since the hole in the crank is so large. They still have a somewhat normal crank that has a counter balance for the piston and rod.
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