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Prop Selection (Again!)

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secatur

Joined: 02 Nov 2006
Posts: 50
Location: New Zealand

Posted: Wed Jun 06, 2007 1:32 am Post subject: Prop Selection (Again!)

Hi Group. If there is anyone here with experience on EA81 prop selection, I would be most grateful for your input.



The aircraft is a Zenith 701 (under construction)



The engine is a Subaru EA81T with fuel injection but minus turbo. With mods (intake,cam etc) should produce about 95+hp.

Max revs should be about 5600



The engine was originally in a Gyro (rebuilt now) and had a 72” Warp Drive 3 blade on a modified hub giving 76” actual. 

And a Rotax “C” gearbox 2.62:1 ratio



The problem is that I only have adequate clearance for a 68” prop (with 8” ground clearance)



I wish to maintain the STOL performance of the aircraft at all cost !



Is there a prop solution ? Or is a change of gearbox/ratio required ?



Is there a way to calculate the best prop section/pitch/diameter for this aircraft ?



What would be the optimum gearbox ratio if a change is neccessary ?



Thanks again,



Steve

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purplemoon99(at)bellsouth
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Posted: Wed Jun 06, 2007 5:19 am Post subject: Prop Selection (Again!)

Conact Lonni Prince -P tip props... He'll be glad to tell you what you need. 

For my money they are the very best climb and cruise  all in one I haveone 

and I can't say enough good about Lonnie,the company,the product, and most 

of all the service before and after the sale  The prop does every thing I'ts 

made to do, No B.S.            Joe N101HD 601 XL

---

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secatur

Joined: 02 Nov 2006
Posts: 50
Location: New Zealand

Posted: Thu Jun 07, 2007 1:44 am Post subject: Re: Prop Selection (Again!)

And you must have plenty of it! $$$$ that is...



P-Tip must make an EXCEPTIONAL prop !!, It's 2-3 times as expensive as anybody else!



Thanks for the thought tho!

Regards,

S

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