X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rome.boulder.noaa.gov ([140.172.10.146] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1180656 for flyrotary@lancaironline.net; Fri, 16 Jun 2006 13:16:39 -0400 Received-SPF: none receiver=logan.com; client-ip=140.172.10.146; envelope-from=William.P.Dube@noaa.gov Received: from [140.172.241.126] (mungo.al.noaa.gov [140.172.241.126]) by email.boulder.noaa.gov (iPlanet Messaging Server 5.2 HotFix 2.01 (built Aug 26 2004)) with ESMTPSA id <0J0Y000W7QMJK6@email.boulder.noaa.gov> for flyrotary@lancaironline.net; Fri, 16 Jun 2006 17:15:55 +0000 (GMT) Date: Fri, 16 Jun 2006 11:10:35 -0600 From: Bill Dube Subject: Re: [FlyRotary] N821GL status report In-reply-to: To: Rotary motors in aircraft Reply-to: William.P.Dube@noaa.gov Message-id: <4492E60B.2050603@noaa.gov> Organization: NOAA Aeronomy Lab MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_BcfRWrT8gfjhR3dNsc9MbQ)" X-Accept-Language: en-us, en User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) References: This is a multi-part message in MIME format. --Boundary_(ID_BcfRWrT8gfjhR3dNsc9MbQ) Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7BIT Congratulations on your success, Jason. I have stopped even estimating when I will be in the air. :-) If you do end up swapping props, I would be interested in your present prop. Are you running an RX-7 or RX-8 engine? The 74x88, in theory, is the right prop for an RX-8 engine with a 2.85:1 PSRU. Bill Dube' Hutchison, Jason wrote: > 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. > > > > 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. > > > > 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. > > > > Yes > --Boundary_(ID_BcfRWrT8gfjhR3dNsc9MbQ) Content-type: text/html; charset=ISO-8859-1 Content-transfer-encoding: 7BIT
Congratulations on your success, Jason. I have stopped even estimating when I will be in the air. :-)

If you do end up swapping props, I would be interested in your present prop.

Are you running an RX-7 or RX-8 engine? The 74x88, in theory, is the right prop for an RX-8 engine with a 2.85:1 PSRU.

Bill Dube'

Hutchison, Jason wrote:

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.

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.

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.

Yes

--Boundary_(ID_BcfRWrT8gfjhR3dNsc9MbQ)--