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11-08-2007, 06:55 AM
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Join Date: Mar 2005
Location: Charlotte, NC
Posts: 306
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Run up Mag drop - one mag and one electronic
What are you seeing on your run up when you have one mag and one electronic ignition?
What RPM are you using for the test?
For me, at high RPM's the drop is greater when I turn off the mag. At low RPM's it is reversed.
Thanks
__________________
Mark Scoggins
Charlotte, NC
RV-6 bought,flown and sold.
Rv-4 bought, flown and sold.
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11-08-2007, 07:56 AM
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Join Date: Jul 2005
Posts: 433
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runup data point
Hi,
I have an o-320 in my 9A. Left side is mag right side is lightspeed
I do my test at 1600 RPM
Mag drop is 20 to 30 RPM.
Electronic drip is about 70 RPM.
Don't know if that is good or bad, but have 220 hours on since march and never had a problem.
Duane
__________________
Duane Wilson
RV9A. Built, flew 1000 hours, Sold
RV10 Built, flying 330 hours so far.
Central Oregon
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11-08-2007, 05:59 PM
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Join Date: Dec 2006
Location: Panama City, FL
Posts: 37
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IO-360 A1A 200hp
I test at 1900 rpm.
0-10 drop with Mag off.
30-50 drop with EI off. I run an electoair on the right side, with a Hall effect digital RPM display.
__________________
Dave Halasi-Kun
RV-7 N98HK
Last edited by N98HK : 11-08-2007 at 06:00 PM.
Reason: forgot a detail...
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11-08-2007, 06:14 PM
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Join Date: Mar 2005
Location: Charlotte, NC
Posts: 306
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1900 RPM ?
Wow, 1900 RPM would be almost full power with my fixed pitch sensenich prop. I show 24" MP at 1800 RPM. That speed gives 125 drop when I turn off the mag. Half that when I turn off the EI.
You must have a C/S prop?
__________________
Mark Scoggins
Charlotte, NC
RV-6 bought,flown and sold.
Rv-4 bought, flown and sold.
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11-14-2007, 09:39 PM
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Join Date: Sep 2007
Location: Larkspur, Colorado
Posts: 31
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Electronic Ign Mag drop
Hi Gang,
I have the IO360 CS prop with one impulse Mag and one LightSpeed ignition.
I believe that Klaus says in his specs to expect 150-200 rpm drop when selecting the mag.
I get 0-10 drop on the Plasma II and I get 100-150 drop on the mag.
FYI
Don
RV 7 ECi Titan EX IO360
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11-14-2007, 10:39 PM
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Join Date: Aug 2005
Posts: 436
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I have one ElectroAir EI & one Slick mag. I use 1700 rpm with my 360 & C/S prop. Here's what I see...
Mag off: 0-20 rpm drop
EI off: 75-150 rpm drop (usually about 125)
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11-15-2007, 07:06 AM
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Join Date: Jan 2005
Location: Paradise,Pa S37
Posts: 735
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I have a 0-360 with one slick MAG and one lightspeed, I see a 30 rpm drop with just the lightspeed on and I see 50rpm drop when running on just the mag.
__________________
All the Best ;-)
RV-8
RV-9 once the kids are older
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11-15-2007, 08:26 AM
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Join Date: Sep 2005
Posts: 333
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I have a 0-360 with one slick MAG and one Lightspeed. I drop about 30 RPM on each system.
__________________
Hugh
Northern California
RV-7 Flying
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11-15-2007, 09:13 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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ARE YOU SURE YOU'R TURNING OFF THE MAG!
Quote:
Originally Posted by markscogg
I show 24" MP at 1800 RPM. That speed gives 125 drop when I turn off the mag.
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I have a 320 fp. mag on left and a LS on the right. At 1600 rpm, when I shut off the MAG..... no change. When I shut off the LS, I see a 100 rpm drop.
At 800 rpm, IT IS REVERSED! |
11-15-2007, 09:57 AM
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Join Date: Mar 2006
Posts: 629
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Eci 0360/180--FP Catto
Mag on Left, LS PIII on Right
Mag check at 1600rpm gives:
10-20 rpm drop when mag switched off
40-70 rpm drop when EI switched off
Cheers,
db
__________________
Dave B.
RV9a/ECiIO360/James Cowl/WW RV200 Prop
Flying since 3/06 and still smiling!!! 
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