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geather

Joined: 06 Feb 2008
Posts: 23
Location: Mt Hutton Australia

Posted: Mon Jun 13, 2011 4:58 pm Post subject: Propellers

Group,



Propellers - An old subject that still remains confusing (to me!). It seems the 2 favourites are the 62 FK58 or 62FK56 wood propellers from Sensenich



What are the current recommendations for the Lightning - both Experimental and LSA. (I am building the LSA 



Is anyone using the Ground Adjustable Composite from Sensenich? If so what are your thoughts and what diameter is recommended - options seem to be from 60 to 64 inches.



I have tried Emailing Mark and Nick but haven't received a response. 



Thanks



Geoff Eather (Australia)



PS: There may be another consideration in prop selection as the LSA in Australia is not restricted to 120 Kts

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_________________
ge

info(at)flylightning.net
Guest

Posted: Tue Jun 14, 2011 4:41 am Post subject: Propellers

Geoff,



We have a few recommended props depending on your mission. 



For absolute speed with out robbing the engine of performance the

Sensenich WC62FK58 is perfect. Best speed and still good climb.



If you want a little better climb go with a WC62FK56.



Now the SLSA LS-1 lightnings have W60zk57G props. We get very good climb

with these and right at 120ktns for 2850rpm. This is again with no

fairings except our LSA wheel pants.



I have had guys run the W60zk57G LSA prop on non LSAs with full fairings

and still get near 130knts, but with exceptional climb, better than the

62-56. 



The Carbon prop is fine, a little harsher in vibrations, the wood seems

to dampen things and give a smoother feel. 



The only thing about the carbon is you won't ever get the same

performance out of it as the best cruise wood prop. This is because of

the blade stiffness, profile and diameter. 



We have done lots of prop testing here, I have several that were ok but

not great and we now use them as loaners. 



As with anything aviation most things are a compromise. And no one prop

will give it all.



Nick



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