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 5.2.0) with ESMTP id 2780805 for flyrotary@lancaironline.net; Thu, 06 Mar 2008 19:52:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([75.191.186.236]) by cdptpa-omta06.mail.rr.com with SMTP id <20080307005148.PBER14418.cdptpa-omta06.mail.rr.com@edward2> for ; Fri, 7 Mar 2008 00:51:48 +0000 Message-ID: <001f01c87fed$745c6c90$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Disaster Averted Date: Thu, 6 Mar 2008 19:52:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 Dave, Before you tear into it, I have on two occasions had green fluid dripping from a tail pipe with the same Oh S--- !! reaction. However, they happened after pretty cold temps and after firing the engine up expecting to see the coolant pressurized by combustion gases, the leak went away. I don't know but, I suspected that the cold temps caused something to shrink just enough for a bit of coolant to leak through. Before tearing it down, I would remove the exhaust and shine a light (borescope would be idea) and do a visual inspection inside the rotor housing looking for signs of a leak. It might help to use a compressor to pressurize the coolant system to 15-20 psi. It you have a coolant O ring leak, the pressure will either seal it OR you will likely see the coolant leaking into the housing. Check around the bottom of the engine where the PSUR attaches if it is caused by a loose tension bolt you will likely see signs of green coolant there. Most of the time if its a bolt it leaks on the outside so you shouldn't see in it the exhaust - but, it might run along the bottom of the pipe giving the impression its coming out the exhaust. Good Luck Ed ----- Original Message ----- From: "David Staten" To: "Rotary motors in aircraft" Sent: Thursday, March 06, 2008 6:57 PM Subject: [FlyRotary] Re: Disaster Averted > Chris informed me this morning that we had coolant coming out of the > tailpipe. I forsee us tearing things down in short order, if its not > something simple like a loose bolt somewhere (not that i have any idea how > one of our tension bolts could have worked loose).. > > Dave > > Tracy Crook wrote: >> I was impressed with the IVO static thrust when I tried it too. Just >> didn't like the cruise and top speed numbers but that should be less of a >> factor on canards since the air is dirty near the hub where the "IVO >> drag" is. >> Can't figure out why you have hot start problems from your descriptions >> but I'm not real familiar with your intake systems layout. I was having >> similar hot starting problems with my 20B but I knew the cause (low >> cranking compression). I had a custom hand built set of apex seals that >> turned out to have dimension errors. Do you know your hot cranking >> compression? If not, it's worth measuring given your symptoms. >> The other starting problem I've seen lately was on Renesis crank sensors >> caused by starter noise pickup. I know you don't have a Renesis CAS but >> it might be worth trying the 1000 ohm resistors on your 2nd gen sensors >> just in case. (remember, there are 2 sensors in the 2nd gen CAS). The >> key symptom with starter induced noise is that the engine will often try >> it's best to start (or sometimes actually start) at the moment when you >> release the starter switch. >> Tracy >> On Sun, Mar 2, 2008 at 11:15 AM, Christopher Barber >> > wrote: >> >> It is amazing what a little change can make. After I let my engine >> cool for >> about two hours last night I was able to get it to start again. I >> had run >> it earlier at fast idle to see how long it took to get the temps >> up. It >> took about 16 minutes for the coolant temp to hit 200 degrees on an >> 80 >> degree day. Most of the run the oil temp was almost exactly the >> same as the >> coolant, but was about 12-14 degrees higher when I shut it down. >> Not too >> bad I hope even though it did seem to run rich from yesterday with >> the >> mixture knob at 12oclock and needed leaning. >> >> While I was waiting for it to cool I decided to flatten out the IVO >> in-flight adjustable pitch prop. It was almost there already, but >> I hooked a >> battery to the contact and made it fully flat. After screwing >> with the hot >> start for a while, it finally fired up (Geeesh, what a pain). >> Everything >> seemed normal except it was rough near idle but smoothed out as I >> gave it >> some throttle. On a wild hair I figured I would increase it to >> WOT to see >> if would stay smooth......BOY, did it stay smooth. The rpm shot >> to above >> 6000 before I knew it (without the EM RPM numbers jumping around >> this time >> as has been a continuing problem) and the plane, which was chocked >> with >> chocks and old full size batteries and a few assorted junk engine >> parts >> started moving forward.......WITH FULL BRAKES APPLIED....skidding >> towards my >> hangar mates restoration project VariEZ. HOLLY CRAP!!!!!, where >> the hell did >> that come from????? I could barely hit 5000 yesterday. >> >> Needles to say, I quickly throttled back with the mixed emotion of >> terror of >> my own stupidity and the rush of excitement to all the seeming new >> power. >> Until I remembered that I changed the pitch on the prop I could not >> understand where all the power came from as I did not change >> anything else. >> Mind you I had INTENDED to look into my crystal ball for the >> answer to my >> warm start problems during the cooling time, but, alas, an airport >> friend >> stopped by and it was mutual Liberaltarian social hour . >> >> FWIW, just a combination war story/progress report with memories >> of John >> Slade reporting on a similar experience a few years back . >> >> All the best, >> >> Chris >> >> Christopher Barber >> Attorney and Counselor at Law >> 5116 Bissonnet, No 418 >> Bellaire, Texas 77401 >> >> Serving the Needs of Senior Texans through >> Planning with Purpose >> >> 281-464-LAWS (5297) >> 281-754-4168 Fax >> www.TexasAttorney.net >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> >> ------------------------------------------------------------------------ >> >> No virus found in this incoming message. >> Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: >> 269.21.4/1313 - Release Date: 3/5/2008 9:50 AM >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >