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  #1  
Old 10-23-2018, 01:35 PM
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scottmillhouse scottmillhouse is offline
 
Join Date: Apr 2007
Location: Madison, AL
Posts: 231
Default CS spinner fitting

Just finished first round of spinner cutouts for my new Hartzell aluminum CS prop on new IO-360. Combo just received from Vans. The last RV I built with CS I just did the best I could and once flying kept removing more fiberglass until no contact at full pitch. This time with a new engine preserved I don't want to rotate the engine any but I do want to rotate the prop blades to insure clearance. Would it work to rig up compressed air to the engine port to twist the prop and if so how many psi to fully rotate the prop? I plan to finish paint all before first flight so I want to insure proper clearance now before I move forward on cowl fitting.
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  #2  
Old 10-23-2018, 03:26 PM
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Champ Champ is offline
 
Join Date: Apr 2012
Location: Kingsville, Ontario, Canada
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I connected air to the prop oil line after the governor. Itís been a while but I donít think it took much air pressure to rotate the prop (25psi maybe). Start low & crank up the pressure til the prop moves.
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Bellanca Champ 7ACA since 1986, restored 1990.
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  #3  
Old 10-23-2018, 04:57 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
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Low tech approach- 2 padded 2x4s tied together at one end & slipped over the prop blade, use as a lever & give it a twist. Very easy to control blade movement & not damage blade.
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Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em
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  #4  
Old 10-23-2018, 06:39 PM
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scottmillhouse scottmillhouse is offline
 
Join Date: Apr 2007
Location: Madison, AL
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Quote:
Originally Posted by Ralph Inkster View Post
Low tech approach- 2 padded 2x4s tied together at one end & slipped over the prop blade, use as a lever & give it a twist. Very easy to control blade movement & not damage blade.
Perfect, Thanks and a lot less mess too I'm sure. Don't know why I did not expect it but about a cup of oil ran out when I removed the front plug and made a mess. I can see a rear plug so I guess even though there was not a governor, since the line was connected engine oil pressure must have forced oil into the crankshaft cavity when Lycoming ran it on the test stand.
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Scott- 2018 dues paid
Got medical back, now building a 7A; N579RV reserved, new engine installed, doing FWF, instruments & finish painting.
RV-12 #120515, N319RV 1st flight 12/2015 now over 270 hours.
RV-9A, 536 hours sold, RV-7 sold, Kitfox sold
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  #5  
Old 10-23-2018, 10:50 PM
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wjb wjb is offline
 
Join Date: Nov 2012
Location: Half Moon Bay, CA
Posts: 797
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This is great info ... trimming my spinner for a CS Hartzell is in my near future. Thanks for sharing your experiences.
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  #6  
Old 10-24-2018, 05:09 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Quote:
Originally Posted by Champ View Post
I connected air to the prop oil line after the governor. It’s been a while but I don’t think it took much air pressure to rotate the prop (25psi maybe). Start low & crank up the pressure til the prop moves.
+1 I used an adapter plate with governor off, and a regulated air supply, started at zero psi. Recommend a particle filter, but no desiccant!! I was not about to use the 2X4 trick on my composite prop, sorry.
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