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Old Jan 26, 2012, 11:21 AM
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Joined Jan 2012
5 Posts
Question
what propeller to use

I have an older Dumas 30" Pay n Pak with an OS max.21 RGMX. Right now I use an Octura X442 prop. It runs pretty good but just wondering if anybody could recommend a better choice. Acceleration isn't as good as I'd like. Any ideas?
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Old Jan 27, 2012, 11:14 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,885 Posts
You might need to prop down a little if it's slow getting up to speed. Generally, most .21's like props in the 37-40mm range. You're working with a comparatively heavy boat so it's a lot to push. A smaller prop will enable it to not only get up to speed faster but also may make it faster as it will alow the OS to rev higher.
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Old Feb 08, 2012, 09:37 PM
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Joined Jul 2011
32 Posts
I'd try a 1440 Octura prop on that hull design with a little cupping at the inner trailing tip about 1/4" long at the first radius ramp...........
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