X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2c3) with ESMTP id 2520939 for flyrotary@lancaironline.net; Fri, 30 Nov 2007 09:33:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([24.74.103.61]) by cdptpa-omta03.mail.rr.com with SMTP id <20071130143226.BGPW19167.cdptpa-omta03.mail.rr.com@edward2> for ; Fri, 30 Nov 2007 14:32:26 +0000 Message-ID: <002a01c8335d$d8e4d670$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Gaylen Lerohl Update??? Date: Fri, 30 Nov 2007 09:32:34 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C83333.EFD32500" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C83333.EFD32500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Gaylen, Glad to hear your fuse problem was resolved. I have flow over 2000 = hours in military aircraft which (at least in my day) never had anything = but circuit breakers. So you can considered me biased toward CBs. = There was more than one occasion a temporary condition would cause a CB = to pop, which I was able to reset and regain use of the equipment - = clearly can not do that with a fuse. =20 Despite the less weight and cheaper alternative of fuses, I (personal = viewpoint) never use fuses in any flight critical systems - I do use = fuses in those which are not flight critical. Nothing against fuses, = except there is no second chance. If the condition persists then of = course, you do not want to keep resetting the CB - but, if a temporary = overload condition - you may keep flying.=20 I have found that it is not uncommon to find (especially in an = automobile with a few years on it) that intermittent electrical problems = could often be traced to corrosion of the fuse holder blades. 90% of the = time , just pulling the fuse and sliding it back in would scrape off = enough corrosion that good metal contact would be made and you were back = in business. The ignition models pull a lot of current and in aircraft use are driven = harder than in automobile usage. The leading module (stock Rx-7 = ignition) actually blew a resistor in its base due to this loading (same = happened to Tracy Crook and a couple of others) and possible elevated = under cowl temperatures early on. So I replace that resistor with a = higher wattage one and have now been flying for 9 years with it. =20 I recently found that my engine would not start - no spark. I traced = the problem to a Molex connection that apparently had not been making = good contact between pin and socket. This had apparently caused arcing = and eventually ended up creating sufficient resistance that large = amounts of current could not flow without a large voltage drop across = the pin. So without a load, if you measured the voltage on each side of = the plug, you got 12.6 volts. But, if you turned the ignition on the = voltage would drop to below 9 volts. Good to hear you got your cooling resolved, give us a further report on = that (with photos) when you are inclined - we are always interested in = approaches that solving any cooling problem. Best Regards Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html ----- Original Message -----=20 From: Gaylen Lerohl=20 To: Rotary motors in aircraft=20 Sent: Friday, November 30, 2007 7:57 AM Subject: [FlyRotary] Re: Gaylen Lerohl Update??? Doug, I finished my first annual condition inspection last month. I have = about 80 hours on it now. I had only one major issue. I used fuses to = protect my wiring. I had an engine stoppage due to a fuse protecting = the coils apparently arcing and eventually building up enough oxide to = prevent current flow. I rewired my flight critical bus using robust = aircraft circuit breakers. The fuse panel appeared normal - no apparent = problems with it and the fuse looked good. It gave me a headache = troubleshooting it! I finally discovered the tiny corroded spot on the = fuse. I'm still using fuses on the non-critical bus. I did a cleanup on the lower cowl and improved airspeed considerably. = Originally my radiator (mounted horizontally under the engine) was open = to the air. At high speeds a rumble was apparent. I have since = extended the cowl to enclose the radiator. Now I can make 176 KIAS at = 3500'. That is about the top speed Van says one should get from a 160HP = engine. =20 The engine is running good and I have halted improvement projects = until warmer wx in the spring. It's still a work in progress! The = airplane flys well. =20 Our chapter organizes impromptu fly-outs whenever the wx looks good. = Last Sunday four airplanes went up to Brainerd for one of those $100 = hamburgers! We're trying to keep the rust out of them! Gaylen ----- Original Message -----=20 From: DLOMHEIM@aol.com=20 To: Rotary motors in aircraft=20 Sent: Thursday, November 29, 2007 6:24 PM Subject: [FlyRotary] Gaylen Lerohl Update??? Gaylen: What is up with your aircraft? How many hours do you have on it by = now? Are there any issues with it you have had to address? What if = anything would you do differently with what you know about it now? The = list is awefully slow of late and seeing your post made me curious as to = your status since I haven't seen you mention it in quite a while. Next = Fall I will have my 25th college reunion in St Paul, and I hope to fly = my 9A up there to Blaine County...TBD of course. Thanks for any updates. Doug Lomheim RV-9A, FWF OK City, OK=20 -------------------------------------------------------------------------= --- Check out AOL Money & Finance's list of the hottest products and top = money wasters of 2007. ------=_NextPart_000_0027_01C83333.EFD32500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Gaylen,
 
Glad to hear your fuse problem was resolved.  I = have flow=20 over 2000 hours in military aircraft which (at least in my day) never = had=20 anything but circuit breakers.  So you can considered me biased = toward=20 CBs.   There  was more than one occasion a temporary = condition would cause a CB to pop, which I was able to reset and regain = use of=20 the equipment - clearly can not do that with a fuse. 
 
Despite the less weight and cheaper alternative of = fuses, I=20 (personal viewpoint) never use fuses in any flight critical systems - I = do use=20 fuses in those which are not flight critical.  Nothing against = fuses,=20 except there is no second chance.  If the condition persists then = of=20 course, you do not want to keep resetting the CB - but, if a temporary = overload=20 condition - you may keep flying. 
 
I have found that it is not uncommon to find = (especially in an=20 automobile with a few years on it) that intermittent electrical problems = could=20 often be traced to corrosion of the fuse holder blades. 90% of the time = , just=20 pulling the fuse and sliding it back in would scrape off enough = corrosion that=20 good metal contact would be made and you were back in = business.
 
The ignition models pull a lot of current and in = aircraft use=20 are driven harder than in automobile usage.  The leading module = (stock Rx-7=20 ignition) actually blew a resistor in its base due to this loading (same = happened to Tracy Crook and a couple of others) and possible elevated = under cowl=20 temperatures early on.  So I replace that resistor with a higher = wattage=20 one and have now been flying for 9 years with it. 
 
I recently found that my engine would not start - no = spark.  I traced the problem to a Molex connection that apparently = had not=20 been making good contact between pin and socket.  This had = apparently=20 caused arcing and eventually ended up creating sufficient resistance = that large=20 amounts of current could not flow without a large voltage drop across = the=20 pin.  So without a load, if you measured the voltage on each side = of=20 the  plug, you got 12.6 volts.  But, if you turned the = ignition on the=20 voltage would drop to below 9 volts.
 
 
Good to hear you got your cooling resolved, give us = a further=20 report on that (with photos) when you are inclined - we are always = interested in=20 approaches that solving any cooling problem.
 
Best Regards
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp://www.andersonee.com
http:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html
 
----- Original Message -----
From:=20 Gaylen = Lerohl=20
Sent: Friday, November 30, 2007 = 7:57=20 AM
Subject: [FlyRotary] Re: Gaylen = Lerohl=20 Update???

Doug,
I finished my first annual condition inspection last month.  = I have=20 about 80 hours on it now.  I had only one major issue.  I = used fuses=20 to protect my wiring.  I had an engine stoppage due to a fuse = protecting=20 the coils apparently arcing and eventually building up enough oxide to = prevent=20 current flow.  I rewired my flight critical bus using robust = aircraft=20 circuit breakers.  The fuse panel appeared normal - no apparent = problems=20 with it and the fuse looked good.  It gave me a headache = troubleshooting=20 it!  I finally discovered the tiny corroded spot on the = fuse.  I'm=20 still using fuses on the non-critical bus.
 
I did a cleanup on the lower cowl and improved airspeed=20 considerably.  Originally my radiator (mounted horizontally under = the=20 engine) was open to the air.  At high speeds a rumble was = apparent. =20 I have since extended the cowl to enclose the radiator.  Now I = can make=20 176 KIAS at 3500'.  That is about the top speed Van says one = should get=20 from a 160HP engine. 
 
The engine is running good and I have halted improvement projects = until=20 warmer wx in the spring.  It's still a work in progress!  = The=20 airplane flys well. 
 
Our chapter organizes impromptu fly-outs whenever the wx looks=20 good.  Last Sunday four airplanes went up to Brainerd for one of = those=20 $100 hamburgers!  We're trying to keep the rust out of = them!
 
Gaylen
----- Original Message -----
From:=20 DLOMHEIM@aol.com
To: Rotary motors in = aircraft=20
Sent: Thursday, November 29, = 2007 6:24=20 PM
Subject: [FlyRotary] Gaylen = Lerohl=20 Update???

Gaylen:
 
What is up with your aircraft?  How many hours do you have = on it=20 by now?  Are there any issues with it you have had=20 to address?  What if anything would you do differently = with what=20 you know about it now?  The list is awefully slow of late and = seeing=20 your post made me curious as to your status since I haven't seen you = mention=20 it in quite a while.  Next Fall I will have my 25th college = reunion in=20 St Paul, and I hope to fly my 9A up there to Blaine County...TBD of=20 course.
 
Thanks for any updates.
 
Doug Lomheim
RV-9A, FWF
OK City, OK



Check out AOL Money & Finance's list of the hottest products and top money wasters of=20 2007.
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