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01-02-2020, 05:13 PM
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Join Date: Feb 2006
Location: Sydney, Australia
Posts: 251
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Removing the rotor?
How do you remove the magnet/rotor assembly from the shaft? Is it a press fit?
Thanks
Richard
__________________
Richard Talbot
RV-7A
Sydney, Australia
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01-02-2020, 08:46 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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Quote:
Originally Posted by rwtalbot
How do you remove the magnet/rotor assembly from the shaft? Is it a press fit?
Thanks
Richard
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The one i used was from a slick mag. I tried to machine it off with poor results. Then i realized it is cast on (maybe aluminum) with the magnets embedded in the casting. I ended up just melting it off with a propane torch. Then there were two brass rivets that I drilled out.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
Last edited by WingsOnWheels : 01-02-2020 at 08:50 PM.
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01-02-2020, 08:49 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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Where are you guys mounting your coils? In the upper plenum area would make for short plug wires (for one set), plus it is pretty cool during flight. On the other hand, on the firewall gets them away from the vibration.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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01-02-2020, 09:15 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by WingsOnWheels
Where are you guys mounting your coils? In the upper plenum area would make for short plug wires (for one set), plus it is pretty cool during flight. On the other hand, on the firewall gets them away from the vibration.
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On the 6, I put the coil on the firewall. Not enough room to put on top of the engine with the coil type I had (top facing posts). On the 10, I put one on top of the engine and the other on top of the engine mount. The 10 cowl area has a lot more room to work with though.
Larry
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N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
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01-02-2020, 10:00 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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Quote:
Originally Posted by lr172
On the 6, I put the coil on the firewall. Not enough room to put on top of the engine with the coil type I had (top facing posts). On the 10, I put one on top of the engine and the other on top of the engine mount. The 10 cowl area has a lot more room to work with though.
Larry
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Thanks for the input. I think i am going to mount them to the engine mount on angle atrached via cushion clamps. I could always move thrm to the firewall later, but this looks to be the most modular and least intrusive.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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01-03-2020, 12:37 AM
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Join Date: Feb 2006
Location: Sydney, Australia
Posts: 251
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Quote:
Originally Posted by WingsOnWheels
The one i used was from a slick mag. I tried to machine it off with poor results. Then i realized it is cast on (maybe aluminum) with the magnets embedded in the casting. I ended up just melting it off with a propane torch. Then there were two brass rivets that I drilled out.
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Thanks Colin, I had issues with the first one too. On the second one I found an angle grinder removed most of it. I then carefully removed the remainder with the lathe.
__________________
Richard Talbot
RV-7A
Sydney, Australia
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01-03-2020, 02:06 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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Quote:
Originally Posted by rwtalbot
Thanks Colin, I had issues with the first one too. On the second one I found an angle grinder removed most of it. I then carefully removed the remainder with the lathe.
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The torch ended up working great. Took just a couple minutes and everything came off clean.
__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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01-03-2020, 05:26 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,564
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Quote:
Originally Posted by WingsOnWheels
I'm happy to repost my drawing in inches. However, my setup is yet untested. Also, I made a few minor tweaks that aren't on the drawing. I made the o-ring grooves slightly deeper and made the engine-side bearing press fit and the aft bearing slip-fit.
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Yes that would be great.
Would like a drawing of the shaft as well. I think it would be ok to make it out of 4140 or 8620 steel.
__________________
Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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01-08-2020, 08:08 PM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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Quote:
Originally Posted by rocketbob
Yes that would be great.
Would like a drawing of the shaft as well. I think it would be ok to make it out of 4140 or 8620 steel.
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Bob,
Sorry for the delay. Here is my housing drawing in inches. I don't have a detail drawing of the shaft since I repurposed one from a slick mag.

__________________
Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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01-14-2020, 03:38 AM
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Join Date: Feb 2006
Location: Sydney, Australia
Posts: 251
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Quote:
Originally Posted by WingsOnWheels
Bob,
Sorry for the delay. Here is my housing drawing in inches.
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Interesting, so you have an O-ring seal at the top or is that grove for bearing retention?
How are you attaching the gear to the shaft? Loctite 638 might be an option with interference fit, or is there still room for a grub screw? There must be a secure solution involving a minimum of machining. It looks like Dan may have used grub screws.
__________________
Richard Talbot
RV-7A
Sydney, Australia
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