X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from gv-out-0910.google.com ([216.239.58.190] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3119600 for flyrotary@lancaironline.net; Mon, 08 Sep 2008 12:30:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.239.58.190; envelope-from=msteitle@gmail.com Received: by gv-out-0910.google.com with SMTP id n8so250653gve.13 for ; Mon, 08 Sep 2008 09:29:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type:references; bh=wf4XVo4Vdjq7M3HABA3EdpLfoD3fppv3Kb3QdJpW/5w=; b=SP+ljJwTJftxyAXrY4GD1gIiiV3+gao3+6rXcmZGg9Inr0UWNNx5/SD5VcySaIzBtL QZHxxomfopou3zPVAlMrGd+7JgZi5xpU+lQ46ybZXABn0GTlIlwYVBPqXZ1oK5Di9opE ZnAmkTQ4OMhGTnTNZIqKsqGd4x28KRW4Rk1UM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:references; b=PEgAzKLLyu6hqoOq6jlZTHyYAfohzh7tVbgL1PocEgDrfSJy4cdHoBD8mnlU0gXeKf n5LxZruXhnfTYtGoyQLrI/rrkYtfbR7ScGhq8C7cRgGa9oF5ftZ9zHgWIv02jYIgBPjL odNy316ms68KHH1fAQzMb+hVrmNcLwxSe1slc= Received: by 10.210.67.20 with SMTP id p20mr19010315eba.66.1220891385458; Mon, 08 Sep 2008 09:29:45 -0700 (PDT) Received: by 10.210.24.6 with HTTP; Mon, 8 Sep 2008 09:29:45 -0700 (PDT) Message-ID: <5cf132c0809080929qd83c6f1u306d50c229267c13@mail.gmail.com> Date: Mon, 8 Sep 2008 11:29:45 -0500 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] 20B Update from Mark? In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_96075_25090292.1220891385436" References: ------=_Part_96075_25090292.1220891385436 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Doug, Well, the Texas heat is still with us, but only in the upper 90's, not triple-digits. We had about 50 days this summer in the triple-digit territory and I'll have to say that I gave out before my cooling system did. Highest coolant temp I saw on the water was 220. But with a 23# cap and running an ethlene-glycol mix, I felt ok. I don't think I could say that if it went much higher. Keep in mind that this is during climb out where I'm pushing it pretty hard. Oil temps will sometimes hit 230, but that is after the first cooler. The second cooler brings the temps down another 10-20*. These are worst case readings, temps in cruise climb and cruise are lower, of course. I measure water temps coming out of the engine and again after the radiator, and oil temps after the oil/air exchanger and again after the oil/water exchanger. Overkill, but I had the extra channels, so I used them for this. All in all, I'm happy with my cooling system and don't plan on making any changes. It has more reserve than me or my pax. I have noticed a lot of buildup on the radiator fins (not bugs). That can't help the temps any. I need to keep an eye on that. One addition that I may consider before next summer is to add water spray to the main radiator to use if things start to get out of hand. A quart reservoir would probably be sufficient. The only other issues has been a small but nagging oil leak, and tuning the EC-2. I finally figured out that I had a wiring error on the EC-2 PCM (Programming Control Module), which prevented the auto-tune feature from working, and a defective PCM. Having corrected both of those, I am still working with Tracy to try and figure out why the EC-2 MAP table gets corrupted mysteriously and without warning. I'll post something for the group after we find and fix the problem. This only seems to be a problem with fiberglass a/c, so you RV types have nothing to worry about. I've burned the packing out of the Hushpower II muffler many hours ago. It had been nice an quiet... for the first 30 minutes. Not sure if there is an answer for that one unless I want to install a turbo-charger. The real "jewel" has been the c/s prop. This allows me to cruise at around 10.6 gph at 4200-4500 rpm, 153 TAS. Until recently, I had been cruising at 5200 rpm, burning 14-15 gph. Speeds are about the same. Keep in mind that I normally fly at 3500-5500 msl. I anticipate lower fuel burn at higher altitudes. I'm planning a trip to Galveston in October and I can try out this theory then. Mark On Mon, Sep 8, 2008 at 10:15 AM, wrote: > Howdy Mark...the majority of the nasty high temperature days should be > over in your neck of the woods now so I was wondering how your cooling > faired this summer, etc.? Have you pretty much gotten any "bugs" worked out > of your installation so it has basically become more automotive like (a > simple turn key operation)? > > Thanks for the update. > > Doug Lomheim > RV-9A / 13B > > > > > ------------------------------ > Psssst...Have you heard the news? There's a new fashion blog, plus the > latest fall trends and hair styles at StyleList.com > . > ------=_Part_96075_25090292.1220891385436 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Hi Doug,
 
Well, the Texas heat is still with us, but only in the upper 90's,=  not triple-digits.  We had about 50 days this summer in the trip= le-digit territory and I'll have to say that I gave out before my cooli= ng system did.  Highest coolant temp I saw on the water was 220. = But with a 23# cap and running an ethlene-glycol mix, I felt ok. &nbs= p;I don't think I could say that if it went much higher.  Keep in = mind that this is during climb out where I'm pushing it pretty hard.&nb= sp; Oil temps will sometimes hit 230, but that is after the first cooler.&n= bsp; The second cooler brings the temps down another 10-20*.  The= se are worst case readings, temps in cruise climb and cruise are lower= , of course.  I measure water temps coming out of the engine and = again after the radiator, and oil temps after the oil/air exchanger and aga= in after the oil/water exchanger.  Overkill, but I had the extra chann= els, so I used them for this. 
 
All in all, I'm happy with my cooling system and don't plan on= making any changes.  It has more reserve than me or my pax.  I h= ave noticed a lot of buildup on the radiator fins (not bugs).  That ca= n't help the temps any.  I need to keep an eye on that.
 
One addition that I may consider before next summer is to add water sp= ray to the main radiator to use if things start to get out of hand.  A= quart reservoir would probably be sufficient.
 
The only other issues has been a small but nagging oil leak, and tunin= g the EC-2.  I finally figured out that I had a wiring error on t= he EC-2 PCM (Programming Control Module), which prevented the auto-tune fea= ture from working, and a defective PCM.  Having corrected bo= th of those, I am still working with Tracy to try and figure out why t= he EC-2 MAP table gets corrupted mysteriously and without warning.&nbs= p; I'll post something for the group after we find and fix the problem.=   This only seems to be a problem with fiberglass a/c, so you RV types= have nothing to worry about.
 
I've burned the packing out of the Hushpower II muffler many hours= ago.  It had been nice an quiet... for the first 30 minutes= .  Not sure if there is an answer for that one unless I want to instal= l a turbo-charger.
 
The real "jewel" has been the c/s prop.  This allows me= to cruise at around 10.6 gph at 4200-4500 rpm, 153 TAS.  Until recent= ly, I had been cruising at 5200 rpm, burning 14-15 gph.  Speeds are ab= out the same.  Keep in mind that I normally fly at 3500-5500 msl. = ; I anticipate lower fuel burn at higher altitudes.  I'm plan= ning a trip to Galveston in October and I can try out this theory then.
 
Mark

On Mon, Sep 8, 2008 at 10:15 AM, <DLOMHEIM@aol.com> = wrote:
Howdy Mark...the majority of the nasty high temperature days should be= over in your neck of the woods now so I was wondering how your coolin= g faired this summer, etc.?  Have you pretty much gotten any = ;"bugs" worked out of your installation so it has basically becom= e more automotive like (a simple turn key operation)?
 
Thanks for the update.
 
Doug Lomheim
RV-9A / 13B
  




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