X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1180868 for flyrotary@lancaironline.net; Fri, 16 Jun 2006 16:18:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id k5GKHYi5018715 for ; Fri, 16 Jun 2006 16:17:35 -0400 (EDT) Message-ID: <001101c69182$08b7d840$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] N821GL status report Date: Fri, 16 Jun 2006 16:18:29 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01C69160.81553210" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000E_01C69160.81553210 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Glad to hear the news of more flight time, Jason Temps are not drastically out of line with what I would see on a 90F+ = day. But, so long as my oil stays below 200F and coolant below 220F and = decreases after I pull back on power after level off, I am content. If = your cowl is bulging then you clearly have positive pressure inside the = cowl and you may need more exit area. But, that being said you will = always have a bit of positive pressure as you are slowing the air down = in the cowl. I also have a 74x88 prop with the 2.85 and my static is 6000 rpm. I = nominally have 1200-1500 fpm on take off depending whether light or = heavy and also depending on OAT. I have hit 2000 fpm on a nice cold = day. But, 1200-1500 is more the norm and my bird is a bit on the heavy = side.. If have the 2.85, I wouldn't do anything at this time about the prop. I = believe you are using a Log plenum intake are you not? I am using the = old "dynamic changer" intake. Tracy indicated he did not believe his = current intake (Log) was as effective as his old one - but, then he is = still producing close to 200 HP with his Renesis. I presume you have an = A/F indicator - do you also have a fuel flow meter - the latter can tell = you quite a bit about how much power you are producing. Hang in there - proceed in gentle steps {:>) Ed ----- Original Message -----=20 From: Hutchison, Jason=20 To: Rotary motors in aircraft=20 Sent: Friday, June 16, 2006 10:05 AM Subject: [FlyRotary] N821GL status report I have a little over an hour of flight time on my airplane now and = thought I would give the group a report. After first flight I decided to = change the exhaust system. I copied Bill Eslick and Tracy's system. I am = running Bill's SpinTech muffler. It is much quieter in the cockpit now = and ground reports indicate that my exhaust is slightly deeper that = Bill's but very close.=20 =20 I have a long taxi to get to the runway. Temps at takeoff have been = 150-180 for oil and 190-210 temp for water. Reaching pattern altitude I = am at 210 -215 oil and around 225 for water temp. After leveling off = oil stabilized to 205 and 210 water. Lots of room for improvement, but = it has been 90 plus degrees for every flight. On the last flight I = noticed the upper cowl is bulging between fasteners. I am waiting for = Bill's upper louver experiment to decide weather to try to exit the air = high or low.=20 =20 I am getting about 5000 RPM static and at 140 MPH the engine turns up = to 6200 RPM. I would like to do a couple ground runs with a smaller = pitch prop to determine if I am over-propped or just not producing = power. If any one has a smaller pitch prop for sale or loan please let = me know. I am currently running a Performance Props Inc. 74x88. Takeoff = rolls take about 1000 ft. and climb out is very flat. =20 =20 Yes =20 ------=_NextPart_000_000E_01C69160.81553210 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Glad to hear the news of more flight time,=20 Jason
 
Temps are not drastically out of line with what = I would=20 see on a 90F+ day.  But, so long as my oil stays below 200F and = coolant=20 below 220F and decreases after I pull back on power after level off, I = am=20 content.  If your cowl is bulging then you clearly have positive = pressure=20 inside the cowl and you may need more exit = area. =20 But, that being said you will always have a bit of positive pressure as = you are=20 slowing the air down in the cowl.
 
I also have a 74x88 prop with the 2.85 and my = static is=20 6000 rpm.  I nominally have 1200-1500 fpm on take off depending = whether=20 light or heavy and also depending on OAT.  I have hit 2000 fpm on a = nice=20 cold day.  But, 1200-1500 is more the norm and my bird is a bit on = the=20 heavy side..
 
If have the 2.85, I wouldn't do anything at this = time=20 about the prop.  I believe you are using a Log plenum intake are = you=20 not?  I am using the old "dynamic changer" intake.  Tracy = indicated he=20 did not believe his current intake (Log)  was as effective as his = old one -=20 but, then he is still producing close to 200 HP with his Renesis.  = I=20 presume you have an A/F indicator - do you also have a fuel flow meter - = the=20 latter can tell you quite a bit about how much power you are=20 producing.
 
Hang in there - proceed in gentle steps=20 {:>)
 
Ed
----- Original Message -----
From:=20 Hutchison, = Jason=20
Sent: Friday, June 16, 2006 = 10:05=20 AM
Subject: [FlyRotary] N821GL = status=20 report

I have a little over an = hour of=20 flight time on my airplane now and thought I would give the group a = report.=20 After first flight I decided to change the exhaust system. I copied = Bill=20 Eslick and Tracy's system. I am running Bill's SpinTech muffler. It is = much=20 quieter in the cockpit now and ground reports indicate that my exhaust = is=20 slightly deeper that Bill's but very close. =

 

I have a long taxi to = get to the=20 runway. Temps at takeoff have been 150-180 for oil and 190-210 temp = for water.=20 Reaching pattern altitude I am at 210 -215 oil and around 225 for = water temp.=20  After leveling off oil stabilized to 205 and 210 water.  = Lots of=20 room for improvement, but it has been 90 plus degrees for every = flight. On the=20 last flight I noticed the upper cowl is bulging between fasteners. I = am=20 waiting for Bill's upper louver experiment to decide weather to try to = exit=20 the air high or low.

 

I am getting about 5000 = RPM static=20 and at 140 MPH the engine turns up to 6200 RPM. I would like to do a = couple=20 ground runs with a smaller pitch prop to determine if I am = over-propped or=20 just not producing power. If any one has a smaller pitch prop for sale = or loan=20 please let me know. I am currently running a Performance Props Inc. = 74x88.=20  Takeoff rolls take about 1000 ft. and climb out is very flat.=20   

 

Yes=20  

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