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  #111  
Old 09-24-2008, 09:33 AM
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lostpilot28 lostpilot28 is offline
 
Join Date: Nov 2006
Location: Boise, ID
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Hi Bill,
Yes, I replied to it yesterday (I think...or the day before). Did you not get it?
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Boise, Idaho
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  #112  
Old 09-24-2008, 03:07 PM
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N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
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Quote:
Originally Posted by lostpilot28 View Post
Hi Bill,
Yes, I replied to it yesterday (I think...or the day before). Did you not get it?
No, please resend it. My email was moved to a new server and a number of emails were lost.
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RV-9 (Yes, it's a dragon tail)
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  #113  
Old 09-27-2008, 09:14 AM
Tom Muller Tom Muller is offline
 
Join Date: Aug 2008
Location: Poland Spring, Maine
Posts: 7
Thumbs up E-Mag Overtemp

During the early stages of break-in, my oil temps were high due to using the Van's oil cooler baffle during the summer. Additionally, the E-mag/P-mag blast tubes were quite short. One July day with OAT in the high 80s, I flew about 18 miles, parked a few minutes then failed the run-up on the E-mag. Since my engine runs quite well on one mag only, I have no idea if the mag failed airborne or from heat soaking. I was unable to restart that mag even after full cool-down and they sent a new unit. A couple weeks later, I cruised about 12 miles in formation with a J-3 at 60kt on a hot day...bad for cooling. The mag failed again, but this time I was able to clear a fouled plug with leaning after an overnight rest.

Good engine cooling and blast tubes that practically touch the base of the mags are critical to keeping the E-mag and P-mag happy. I removed the oil cooler baffle, now using it only during Maine's cold winters and extended the tubes. There has not been a bit of ignition trouble in a year and 160 hours. I recently had a prop strike, which necessitated an engine teardown inspection. I will be breaking the engine in all over again, but this time in fall temperatures, hopefully with no ignition issues.

The guys at E-mag have been super and I would not fly behind any other type of ignition.
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  #114  
Old 10-06-2008, 06:57 AM
Mike Ice Mike Ice is offline
 
Join Date: Apr 2006
Location: Sedro Wooley, WA
Posts: 147
Default sparks again

Taking out the E/P mag and installing Unison mags has been an interesting event. But the new latest, no SB's, Slick mags started right up and seem to run great.

The simplicity of the wiring scheme for traditional mags is awesome. I also removed the cooling blast tubes, don't need them anymore.

Now all I need is for the weather to clear and I will be able to fly, it snowed yesterday.

E/P mag failures lost me almost one whole month of flying this last summer.

As soon as I can I will send in the E/P mag for the final blessing from Emagair then they will be for sale with all the latest upgrades and tranferable warranties.

Mike Ice
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  #115  
Old 10-06-2008, 07:57 AM
vic syracuse vic syracuse is offline
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I wouldn't eliminate the blast tubes on the mags. They are common practice.

Vic
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  #116  
Old 10-06-2008, 07:57 AM
Martin Sutter Martin Sutter is offline
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Join Date: Jan 2005
Posts: 266
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Mike,

Do not remove those blast tubes. Regular magnetos have temperature limits that are not to different from P-Mags. The coils do not like heat and most certified airplanes have blast tubes also.

Martin Sutter
building and flying RV's since 1988
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  #117  
Old 10-06-2008, 08:14 AM
Mike Ice Mike Ice is offline
 
Join Date: Apr 2006
Location: Sedro Wooley, WA
Posts: 147
Default blast tubes

Ok. Thanks for the updates. Blast tubes going back on.

Mike
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  #118  
Old 10-12-2008, 12:33 PM
Mike Ice Mike Ice is offline
 
Join Date: Apr 2006
Location: Sedro Wooley, WA
Posts: 147
Default mag blast tubes

Martin and Vic,

I looked at several Cessna's this past week and none of them had blast tubes for the mags.

Are RV's that different that they require blast tubes?

Does Van's suggest Blast tubes for regular Mags?

Mike ice
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  #119  
Old 10-12-2008, 02:55 PM
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Kevin Horton Kevin Horton is offline
 
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Location: Ottawa, Canada
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Quote:
Originally Posted by Mike Ice View Post
Martin and Vic,

I looked at several Cessna's this past week and none of them had blast tubes for the mags.

Are RV's that different that they require blast tubes?
How tightly are Cessna's cowled? Van has gone to great lengths to craft a cowling that fits tightly to the engine, and to come up with a design that requires the minimum amount of cooling air. As a result, you will often read reports from builders saying that they must climb at over 100 mph to keep the engine temperatures in an acceptable range. I've never heard a single engine Cessna that needed to climb at over 100 mph for cooling reasons.

I don't know whether blast tubes are "required" on mags on RVs or not. But, I wouldn't use the Cessna experience as a guide unless you are prepared to push a lot more air through the engine, and accept the performance penalty that goes with that.
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  #120  
Old 10-12-2008, 05:32 PM
RV6ARoger RV6ARoger is offline
 
Join Date: Jan 2007
Location: Granger, IA
Posts: 22
Default Can Cessnas even climb at more than 100 MPH?

Just a joke there. My time climbing in 150's and 172's were not at over 100 mph.

I have had a few year's experience with one P-Mag and one bendix on my -6A. )O-360 Hartzell CS. I have had no problems with it. I just keep tabs on software updates and have Brad update the unit when a new one comes out. I just completed my annual, and received the P-Mag back from Brad yesterday. He did the magnet update as well as a software update. I understand that a few of you have had some problems, and I am sorry for that. Keep in mind that this is nothing new. No matter what you put on your plane, you may have problems of some sort or other. The P-Mag is a solid design, and will get even better over time. I have never had a glitch with mine. Just works great. Took it up for a check out after the annual was completed earlier today, and everything worked fine. I am going to install another P-Mag as soon as I can wrangle the money out of mama.

Brad has been great at P-Mag. They really support their product, much farther than most other companies would go. If we ran for the hills everytime a new supplier with a great idea had a problem, we would have nothing to purchase in the experimental market, except old designed grossly overpriced. STC'd products. Heck, in that case, we might just as well just fly the Cessnas. Just my opinion. Roger
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