X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 50 [XX] Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1663554 for flyrotary@lancaironline.net; Mon, 11 Dec 2006 10:57:38 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-100-190.carolina.res.rr.com [24.74.100.190]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id kBBFuccA019557 for ; Mon, 11 Dec 2006 10:56:38 -0500 (EST) Message-ID: <000701c71d3c$f6fc94a0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Great Flight Date: Mon, 11 Dec 2006 10:56:47 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C71D13.0DD58670" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C71D13.0DD58670 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Great to hear about your flight, Steve. You will discover that even a few degrees difference in OAT is reflected = in coolant and oil temps. I can usually detect a change of 2-5F OAT = just from my coolant temps. A back fire underboost may reflect running a bit lean - no harm to NA = engines, but as you know - could be unhealthy for boosted engines. Sounds like things are going well, I believe you are the only stock = turbo that has survived thus far. So sounds like your boost management = is helping reliability, keep it up. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Monday, December 11, 2006 9:24 AM Subject: [FlyRotary] Great Flight Yesterday, the weather was outstanding. A little cool at 56 degrees, = but sunny and no wind. It was very nice to drive only 15 minutes to the = airport, to take the plane up for a flight around the area. =20 On the flight bringing it up to NC 2 weeks ago, I thought that the = engine was running a little rich, and after trying option 9 to lean it = up, it really didn't change too much. Then, in a moment of sheer = brilliance, I decided to lean it a little more using mode 3. Still = didn't change the mixture much, but I was happy with it, so I left it = alone. When I throttled back upon arrival, the mixture bottomed out, = and the engine stumbled pretty bad. After a quick rotation of the = mixture control, and a couple clicks on option 9, it was running good = again, until I throttled back a little more, and started the cycle all = over again. =20 A couple of days later, I went to the airport and decided at this = point, my best option was to return to factory default, and start over, = which I did. After tuning it for 10 minutes or so, I figured it was = good enough for a flight. =20 After preflight and taxi, my oil temperature was at 140 degrees, but = my coolant was still laying on the 100 degree peg. That is quite = different than normal. I waited for a few minutes until it started to = move, just to make sure that it was working. When I took off, I pushed = the throttle forward, and the engine roared to life. It really roared = to life, because it was running at about 8 lbs of boost. I backed it = down a little to 5 lbs, and it backfired once, but then ran smoothly. = After climb out to about 2000 feet, the water and oil were only at 160 = degrees, which was really a surprise. It was a little cooler than = normal, but the temperatures were running about 20 degrees cooler. =20 I flew for about 20 minutes, surveying my new flying area, and just = enjoying the view. I then decided to check out the tuning and started = lowering the power. I found several points where the mixture was really = lean, and I made adjustments (option 9 only) to get it where it needed = to be. I think that it probably tuned better now, than it ever has = been, so I'm not going to mess with it anymore. =20 Temperatures never did get above 160 degrees, which makes me wonder if = I had an air bubble in the cooling system that worked out during, or = after the long flight 2 weeks ago. Whatever it is, I like it. I slowed = up to 100 kits approaching the downwind, and made a perfect approach and = landing. After the decent and landing, temperatures were at about 140 = degrees, and the engine was running very good. =20 It's very nice to can add fuel and fly, but I think that before my = next flight, I'll pull the top cowling, and just give everything a once = over, to make sure that everything is still good. I'll also re-torque = the prop. =20 =20 Steve Brooks Cozy MKIV N75CZ Turbo Rotary - 48 hours and counting.=20 ------=_NextPart_000_0004_01C71D13.0DD58670 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Great to hear about your flight, = Steve.
 
You will discover that even a few degrees = difference in=20 OAT is reflected in coolant and oil temps.  I can usually detect a = change=20 of 2-5F OAT just from my coolant temps.
 
A back fire underboost may reflect running a bit = lean - no=20 harm to NA engines, but as you know  - could be unhealthy for = boosted=20 engines.
 
Sounds like things are going well, I believe you = are the=20 only stock turbo that has survived thus far.  So sounds like your = boost=20 management is helping reliability, keep it up.
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html
----- Original Message -----
From:=20 Steve=20 Brooks
Sent: Monday, December 11, 2006 = 9:24=20 AM
Subject: [FlyRotary] Great = Flight

Yesterday,=20 the weather was outstanding.  = A=20 little cool at 56 degrees, but sunny and no wind.  It was very nice to drive = only 15=20 minutes to the airport, to take the plane up for a flight around the=20 area.

 

On the=20 flight bringing it up to NC 2 weeks ago, I thought that the engine was = running=20 a little rich, and after trying option 9 to lean it up, it really = didn=92t=20 change too much.  Then, = in a=20 moment of sheer brilliance, I decided to lean it a little more using = mode=20 3.  Still didn=92t = change the=20 mixture much, but I was happy with it, so I left it alone.  When I throttled back upon = arrival,=20 the mixture bottomed out, and the engine stumbled pretty bad.  After a quick rotation of = the mixture=20 control, and a couple clicks on option 9, it was running good again, = until I=20 throttled back a little more, and started the cycle all over=20 again.

 

A=20 couple of days later, I went to the airport and decided at this point, = my best=20 option was to return to factory default, and start over, which I = did.  After tuning it for 10 = minutes or so,=20 I figured it was good enough for a = flight.

 

After=20 preflight and taxi, my oil temperature was at 140 degrees, but my = coolant was=20 still laying on the 100 degree peg. =20 That is quite different than normal.  I waited for a few minutes = until it=20 started to move, just to make sure that it was working.  When I took off, I pushed = the throttle=20 forward, and the engine roared to life. =20 It really roared to life, because it was running at about 8 lbs = of=20 boost.  I backed it down = a little=20 to 5 lbs, and it backfired once, but then ran smoothly.   After climb out to = about 2000=20 feet, the water and oil were only at 160 degrees, which was really a=20 surprise.  It was a = little cooler=20 than normal, but the temperatures were running about 20 degrees=20 cooler.

 

I flew=20 for about 20 minutes, surveying my new flying area, and just enjoying = the=20 view.  I then decided to = check out=20 the tuning and started lowering the power.  I found several points where = the=20 mixture was really lean, and I made adjustments (option 9 only) to get = it=20 where it needed to be.  = I think=20 that it probably tuned better now, than it ever has been, so I=92m not = going to=20 mess with it anymore.

 

Temperatures=20 never did get above 160 degrees, which makes me wonder if I had an air = bubble=20 in the cooling system that worked out during, or after the long flight = 2 weeks=20 ago.  Whatever it is, I = like=20 it.  I slowed up to 100 = kits=20 approaching the downwind, and made a perfect approach and = landing.  After the decent and = landing,=20 temperatures were at about 140 degrees, and the engine was running = very=20 good.

 

It=92s=20 very nice to can add fuel and fly, but I think that before my next = flight,=20 I=92ll pull the top cowling, and just give everything a once over, to = make sure=20 that everything is still good.  = I=92ll also re-torque the prop. =20

 

Steve=20 Brooks

Cozy=20 MKIV N75CZ

Turbo=20 Rotary =96 48 hours and counting.=20

------=_NextPart_000_0004_01C71D13.0DD58670--