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From: "Bryan Winberry" <bryanwinberry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
References: <list-5068559@logan.com>
Subject: RE: [FlyRotary] Re: Back to Phase 1 testing
Date: Sat, 30 Jul 2011 08:39:32 -0400
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Tracy,
Does the coil type change require any modification to the EC-2/3?
Bryan

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy
Sent: Saturday, July 30, 2011 8:33 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Back to Phase 1 testing

Yeah, it was kind of a yawner.  Except for the burning smell.  Wasn't sure
if it was fiberglass or electrical for a minute there.   Haven't removed the
dead coils yet but I'm pretty sure they are the culprits.   Still haven't
found how the smell migrated to the cockpit though.

I think the rotor 3 went (actually rotor 1 but I labeled my EGTs front to
back) because they were at the end of the cooling plenum farthest from the
blast tube.  This was also the hottest day that I have done an extended
climb at high power.  I have a temperature probe near those two coils and I
noticed the ambient around them got as high as 170 F.  Need to do some
testing to determine if that blast tube is furnishing enough air.  Oil and
water temps stayed below  200 the whole time.  They dropped into the 125F
range during the descent to landing.

Tracy


Sent from my iPad

On Jul 29, 2011, at 5:22 PM, "Ed Anderson" <eanderson@carolina.rr.com>
wrote:

> Gee, two rotors to come home on doesn't provide much excitement, Tracy.
> 
> Sort of reminds me way back in the old days of using the Rx-7 ignition
coils and ballast resistors blowing on them.  For some reason seems like
that only happened to you and me.
> 
> We are all awaiting some performance numbers for that RV8-3R, so next time
take your bottle and give those Ls1 coils a real try out.
> 
> Ed
> 
> --------------------------------------------------
> From: "Tracy" <rwstracy@gmail.com>
> Sent: Friday, July 29, 2011 2:13 PM
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Back to Phase 1 testing
> 
>> Was finally getting around to doing hot weather cooling and altitude
performance testing in the RV-8 yesterday.   Cooling was good during a high
power climb to 14500 ft where I leveled out ( I had forgotten to put the Ox
bottle in the plane).   Throttled up to WOT to see where the speed topped
out at but.   After less than a minute I felt some engine roughness and
noticed rotor 3 EGT went above alarm threshold so I throttled back to low
power.   #3 EGT then went low off scale and I could tell that the engine was
only running on 2 rotors.   I then smelled a faint electrical burning smell
that lasted about 2 minutes.   Engine was surprisingly smooth for having a
dead rotor and still had more than enough power for cruise flight but
obviously it was time to get back on the ground and find out what went
wrong.   did all the usual diagnostics on the long glide down with no joy.
>> 
>> Made normal landing, poped off the cowl and coil diagnostics test
revealed that both coils on rotor 3 were dead.   I had done the coil disable
tests prior to takeoff so I know they were both good then.  I'm using RX-8
coils and there have been too many failures for me to feel good about them
any longer.   I ordered a set of LS-1s to replace them.
>> 
>> Tracy
>> --
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