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Forum: 3D Flying!

04-05-2005, 11:29 PM

Replies: 18

Proper 3D prop selection

Views: 1,458

Posted By seanychen

RE: Proper 3D prop selection

For 2-stroke .61 (other than OS 61 SF long stroke), over-revving is not a concern unless you are above 15000 rpm. It sounds like your high end mixture is too lean, or you don't get enough fuel draw....

Forum: 3D Flying!

04-05-2005, 03:07 PM

Replies: 18

Proper 3D prop selection

Views: 1,458

Posted By seanychen

RE: Proper 3D prop selection

In terms of peak RPM load, my tach data says that APC 13x4W will peak 500 rpm higher than APC 13x6 on the same engine/fuel. So APC 14x4W is still not quite the same "load" as APC 14x6; perhaps 14x5....

Forum: 3D Flying!

04-05-2005, 02:19 PM

Replies: 18

Proper 3D prop selection

Views: 1,458

Posted By seanychen

RE: Proper 3D prop selection

Hello,

I'd say for Funtana 40 w/ 91 4-stroke, a 14x6 is best match. It will give enough thrust: 10+ lb., so you don't need additional thrust of a 15x4W. It will also spool up/down a lot quicker...

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