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Matt Dralle Site Admin
Joined: 08 Nov 2005 Posts: 25203 Location: Livermore CA USA
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Posted: Sun Aug 30, 2009 8:36 am Post subject: Fitting The Spinner To A Hartzell |
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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 Guest
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Posted: Sun Aug 30, 2009 9:26 am Post subject: Fitting The Spinner To A Hartzell |
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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?>>
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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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