Original Posted By: "Oscar Zuniga"
Hi Folks,Can anyone give me some insight as to a safe maximum prop diameter for a Piet?Safe is sometimes in the eye of the beholder, so if you can give me an idea ofthe prop clearance with flat tires and suspension bottomed out that would help.Ive never flown a FW, so that needs to be considered (I.E. I could certainlydo something bone headed before I gain experience).Im giving some serious consideration to building a Pietenpol. I built a gyroplane,and would now like to do a two place aircraft in wood. I prefer woodworking,and the Pietenpol looks like a good beginner project. The biggest expense itemis the engine, so to get a decent cost estimate Id like to first figure outwhich engine. Largest diameter prop where the tips can be kept in the sonicregion is the most efficient. Hence my question as a starting point. Then I canfigure out what engine has the desired HP at the appropriate RPM (and wont exceedmy limited budget).In just poking around so far the Corvair seems like a light & cost effective choice,but limits prop length due to direct drive. Subaru seems like a cost effectivechoice and reduction units are used, but its on the heavy side. If I winsome money Im buying a Rotec radial [Mr. Green] Thanks & Regards,Gene WeberRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________