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Old 03-01-2003 | 05:34 AM
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Dave McDonald
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Default U-Can-Do CG
The ST 90 with a stock muffler spins the APC 15x4x at 10,800. Experiments with a MCP have boosted the peak RPM to 11,700.

The spool up time with the 15x4x is slower than I would like, but it's not that bad. The wood props I've tried improved the spool up time, but the UCD wasn't as much fun to fly. So I've stuck with the 15x4w. An APC 14x4 might work better, but I don't have one to test.
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