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Fitting The Spinner To A Hartzell

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Matt Dralle
Site Admin

Joined: 08 Nov 2005
Posts: 25203
Location: Livermore CA USA

Posted: Sun Aug 30, 2009 8:36 am Post subject: Fitting The Spinner To A Hartzell

Listers,



Hartzell recommends a minimum .1" clearance around the prop blade for the spinner.  I did that exactly, but the prop would still bang on the spinner at full pitch.  I had to hog out to .25" to keep the clearance at .1" at full pitch.  It looked stupid having such a large gap in one area only so I evened it up to .25" all the way around.  But now it kind of looks like I made the holes too big.  I just can't recall seeing other installations to know if my .25" is "too much".  Anyone have any pics or thoughts on the clearance using late-model Van's CS spinner and a Hartzell, particularly the 72" paddle blades I've got?



Thanks!



Matt Dralle

RV-8 #82880 N998RV

http://www.mykitlog.com/dralle

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Matt Dralle
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larywil(at)comcast.net
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Posted: Sun Aug 30, 2009 9:26 am Post subject: Fitting The Spinner To A Hartzell

At 12:35 PM 8/30/2009, you wrote:

 	  Quote: 	
		  

<<Listers,



Hartzell recommends a minimum .1" clearance around the prop blade 

for the spinner.  I did that exactly, but the prop would still bang 

on the spinner at full pitch.  I had to hog out to .25" to keep the 

clearance at .1" at full pitch.  It looked stupid having such a 

large gap in one area only so I evened it up to .25" all the way 

around.  But now it kind of looks like I made the holes too big.  I 

just can't recall seeing other installations to know if my .25" is 

"too much".  Anyone have any pics or thoughts on the clearance using 

late-model Van's CS spinner and a Hartzell, particularly the 72" 

paddle blades I've got?>>


	




Hi Matt,



Look, its a constant speed prop. It will never look like the close 

fitted spinner of your old fixed pitch. Unless you plan to enter a 

CAFE race or try out at Reno, leave the .25" gap.  This, of course is 

my opinion, but, my -4 has a similar gap and I think nothing of it.



Louis I Willig

1640 Oakwood Dr.

Penn Valley, PA 19072

610 668-4964

RV-4, N180PF

190HP IO-360, C/S prop

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