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11-22-2014, 08:57 AM
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Join Date: Aug 2012
Location: Greene, NY
Posts: 82
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Cranking Engine to Check Spinner Alignment
I'm in the process of adapting a Whirlwind 15 inch spinner to a Sensenich ground adjustable composite prop and would like to check spinner runout (I'm using the Showplanes cowl that requires a 15 inch spinner). Are there any issues with spinning the engine (Superior XP 400) using the starter without the prop blades attached? If this is feasible, should I remove one set of plugs from each cylinder to reduce compression and allow the engine to spin faster?
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Chris Engler, Greene, NY
RV 8 Completed and Flying (N184CE), Showplanes Fastback and Cowl, Barrett IO-360; Dual GRT 10.4 HXr
Kitfox 7; Rotax 914, Built and Sold
VAF donation gladly paid through January 2021
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11-22-2014, 09:02 AM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Turn it by hand. It will be easier to see the runout anyway.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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11-22-2014, 09:11 AM
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Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
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Spinner
By hand , easy to move before you drill . A cheap dial indicator is really handy for this .
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Rv8
N 666 TA
First Flight 2-3-2015 🚀
2017 donation paid
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11-22-2014, 09:15 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
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+2 for by hand, but still remove one plug from each cyl to allow it to turn freely.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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11-22-2014, 09:19 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by Chris Engler
Are there any issues with spinning the engine (Superior XP 400) using the starter without the prop blades attached?
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Quote:
Originally Posted by JonJay
Turn it by hand. It will be easier to see the runout anyway.
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No blades attached---------how U gonna turn by hand???
If the engine has been "pickled", you need to consider what spinning it will do to the long term preservative coating.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010 
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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11-22-2014, 09:47 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,027
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Quote:
Originally Posted by Mike S
No blades attached---------how U gonna turn by hand???
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Easy!
If no prop is installed, then he must be using a spacer to simulate the prop hub
This can be risky BTW if you don't yet have the prop on the premises to confirm the dimension and you use the spacer while fitting the cowl).
What ever is used as a spacer can have holes in it for a piece of pipe to be used as a turning handle.
I agree with Mikes comment regarding the engine preservation though. Turning a pickled engine should be avoided as long as possible.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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11-22-2014, 10:06 AM
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Join Date: Aug 2012
Location: Greene, NY
Posts: 82
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Thanks for the responses. I have the hub, prop blades, and spinner components....just thought it would be safer to rotate the engine without the blades if using the starter to spin. If turning by hand is the consensus, I can install the blades in the hub to rotate. Mainly looking to ensure the spinner rotates concentrically...sounds like using a dial indicator similar to the link below and rotating by had would be the best bet. The engine has been pickled but planning for a first start in the spring so thinking of adding the break in oil and rotating by hand won't be a problem at this point but let me know if this isn't correct.
http://www.harborfreight.com/clampin...tor-93051.html
__________________
Chris Engler, Greene, NY
RV 8 Completed and Flying (N184CE), Showplanes Fastback and Cowl, Barrett IO-360; Dual GRT 10.4 HXr
Kitfox 7; Rotax 914, Built and Sold
VAF donation gladly paid through January 2021
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11-22-2014, 10:07 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Eh, read the first post again.
Ground adjustable prop, no blades attached.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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11-22-2014, 10:11 AM
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Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
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Spinner
You can turn it by hand with the flywheel very easy ( no plugs of course )
__________________
Rv8
N 666 TA
First Flight 2-3-2015 🚀
2017 donation paid
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11-22-2014, 12:53 PM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Don't need dial indicator.
We simply clamped a pencil to an A-frame ladder and moved it 'til the point of the pencil was extremely close to the spinner point and we could easily see which way we needed to bump the spinner.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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