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Fitting The Spinner To A Hartzell

 
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Matt Dralle
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Joined: 08 Nov 2005
Posts: 25781
Location: Livermore CA USA
PostPosted: Sun Aug 30, 2009 8:36 am    Post subject: Fitting The Spinner To A Hartzell Reply with 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?

Thanks!

Matt Dralle
RV-8 #82880 N998RV
http://www.mykitlog.com/dralle

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Don Owens



Joined: 17 Jan 2006
Posts: 24
Location: North Central Washington
PostPosted: Sun Aug 30, 2009 10:16 am    Post subject: Fitting The Spinner To A Hartzell Reply with quote
Ooops! I just now noticed the 'decimal' in your post - that changes
everything.Smile

Don Owens
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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Don Owens



Joined: 17 Jan 2006
Posts: 24
Location: North Central Washington
PostPosted: Sun Aug 30, 2009 10:16 am    Post subject: Fitting The Spinner To A Hartzell Reply with quote
Hi Matt,

I'm not sure where I got the idea, but I clamped a padded 2x4 to the prop
blade so I could rotate it through it's normal travel. Then I, cut'n fit,
cut'n fit, cut'n fit, until I had what appeared to be adequate clearance
between the spinner and prop blade. I didn't know about the 1"
requirement - sounds like a lot. Hmm...now I wonder if I have enough
clearance.

Don Owens
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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dogsbark(at)comcast.net
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PostPosted: Sun Aug 30, 2009 11:44 am    Post subject: Fitting The Spinner To A Hartzell Reply with quote
Matte,

When building my 10, I found out (after) that Hartzell has printable templates to make this cut in the spinner. William Curtis has one listed for the 10 http://nerv10.com/wcurtis/9XOther/8068D_Vans_Hartzell_Cutout_Template.pdf
and I'll see if I can dig one up for your application.

Sean Blair
00V


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