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You’re right, it will not affect the compression, but will affect the ignition …
Jeff
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From:
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Chris Barber <cbarber@texasattorney.net>
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Subject:
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RE: [FlyRotary] Re: Low compression in rotor 2 ... still
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Date:
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Mon, 14 Feb 2011 15:39:26 +0000
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To:
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Rotary motors in aircraft <flyrotary@lancaironline.net>
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Not sure how that would effect the lower compression though.
From: Rotary motors in aircraft [flyrotary@lancaironline.net]
on behalf of Chris Barber [cbarber@texasattorney.net]
Sent: Monday, February 14, 2011 9:35 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Low compression in rotor 2 ... still
Jeff,
I shall give that a try
Chris
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From: Jeff Whaley
Sent: Monday, February 14, 2011 10:29 AM
To: 'Rotary motors in aircraft'
Subject: RE: Low compression in rotor 2 ... still
Chris, try changing your spark plugs. If you’ve caused damage to the rotor springs from detonation, you’ve also exposed the plugs to the same force.
I have never had a problem starting my engine except for this past weekend … wouldn’t start, I was blaming it on the cold, so it got more pre-heat and eventually started exactly as you said, a lot of cranking and liking the starter assist.
Yesterday, same thing wouldn’t start – more pre-heat, still no joy. Pulled the plugs and they were coated with black soot, so I went home, got a brand new set of plugs – engine started right away and with no additional pre-heat.
Jeff Whaley
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From:
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Chris Barber <cbarber@texasattorney.net>
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Subject:
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Low Compression in rotor 2...still
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Date:
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Mon, 14 Feb 2011 03:29:28 +0000
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To:
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Rotary motors in aircraft <flyrotary@lancaironline.net>
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To remind y'all, following very hard starting, I discovered bad apex seal springs in my rotor 2 most likely due
to detonation. I cracked the keg and replaced the rear apex springs and sealed it all back up. While apart, I did not discover any damage other than the bad springs.
I have been trying to tune the engine, however, even using BOTH my EC2's, I am still having problems with very hard
starting. When I do get it to start it is at full lean and I believe only if I switch over to B. Once started I can take the mixture from full lean to a more moderate setting (even if the tuning is still lacking) and it will run on A or B about the same.
I have reset A to factory settings. I do have a bit larger injectors, per Mistrals recommendation, but did crank her up to 22. MAP and adjust Mode 3 once started to just over the mid point per the EC2 manual.
It takes an extended period of time of cranking (maybe 50 or 60 seconds...betting my starter is hating me) before
it starts and then kinda just starts running as a continuation of the starter being turned, instead of the engine actually "firing up".
I pulled the plugs to check inside and unlike before all the apex seals are nice and springy, HOWEVER, when I do
a compression check I am only getting about 60 psi on the rear rotor. I am getting about 80 psi on the front rotor, which is what I expected.
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