X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f222.google.com ([209.85.218.222] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4116885 for flyrotary@lancaironline.net; Mon, 08 Feb 2010 22:36:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.222; envelope-from=lehanover@gmail.com Received: by bwz22 with SMTP id 22so149381bwz.5 for ; Mon, 08 Feb 2010 19:36:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=ANGGZnjGLVHnHDCJxkGu+R4IydFhqrZcO/9RQADPcXo=; b=pzI2ewE3QT5YMPyNCWwazL/sd4uIMt1upBEkMW/DgoqYg6xfSJ2YzT5vAJKtTa2uPN eDydUEGgsNzbwGiDYjeFlfAHIngrNE1U2av0gOlz1amsvYk0AwzX/bl4szBy5XM/0JyX vreQOGlcfPSVt2foejLe8f5hjiHOCjt1bN2SA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=V6tcdMfzDHeaMmer+QGI9bFcFuhAPI/cPYlDXiLT36hlODlOvTuubhg6xKFh+rpfQB vh47ICl2j9uWrfJGL6fPgad+U2CwRmQG8PBa3uUzfC54TgtUhJ46MEkl4C++C2rtqnKx lw9v2vTs+5NT+bgTrwlcpR5aiM2agY+QWhYJ0= MIME-Version: 1.0 Received: by 10.204.15.17 with SMTP id i17mr1297640bka.173.1265686575994; Mon, 08 Feb 2010 19:36:15 -0800 (PST) Date: Mon, 8 Feb 2010 22:36:15 -0500 Message-ID: <1ab24f411002081936o6dafb061ve2db0572229bf2ee@mail.gmail.com> Subject: More throttle now Scotty, we need it now From: Lynn Hanover To: flyrotary@lancaironline.net Content-Type: multipart/alternative; boundary=00032555a7eec263c6047f229e0a --00032555a7eec263c6047f229e0a Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Lynn, You=92ve probably forgotten more about engines that I will ever know! *I've forgotten more than I knew..........you could catch me...........* Based on your quote above (I=92m probably dangerous w/ a die grinder), but = the kind of mods you are suggesting seem pretty straight forward. (besides, if I screw it up, it only costs me a rotor housing ;) My questions are: Q1. If you start to reshape intake ports on a Renesis, how much can you do before you get into the water jacket? *Thats why its called a program. You start off with a junk engine or two, s= o anything you do will cost nothing. Get the same year and model as your finished engine, as there may be big changes year to year. One of the items will be to drill many holes through the port areas, and measure thickness with a wire with a hook on one end. Make a map with the depths marked on it= . Or, band saw the port areas out of the irons and section them about evey 1/= 4 inch outside to inside. Mark each piece on a paper map. * ** *Lay out a duplicate of the map on your practice iron and grind out your port. Now you can look at a segment of the sectioned iron and see how deep you can go in each location.* Q2. In a well-engineered aircraft installation, how much HP is a Renesis making? In and RX-8 they are supposed to make about 225 HP. Are aircraft installations getting that much? *Any RV- would look like a rocket with a real 225 HP engine. Since most rotaries go about as fast as 160 HP "airplane engined" RVs, they probably put out about 155 to 170 HP. A periphery port engine could be puting out 20= 0 to 210 or a bit more if in top tune. * Q3. If mods that you suggest above are made to get intake/exhaust overlap, how much increase in HP can be expected in an aircraft installation? *Just a SWAG, but say we did the port job and added a real header, guess 190-195 HP. Cooling loads go up, but if you can cool it reliability would not be a factor. Although we use carbon apex seals, reliabilty is not a factor at 9,600 RPM. But our "flights are onlt 45 minutes long and 8 or 9 per year.* ** *I would use older 13B rotors and counter weights, then if you're not happy with the power, you can go back in and do a really well thought out periphery port and get well over 200 HP. Use 3MM ceramic seals.* * * *The engine would look new inside for 10 years of flying. Ceramic and carbo= n seals are very easy on the chrome. Run the OMP wide open and feed it a name brand 2 cycle oil.* * * ** *Porting is used to change the timing, like installing a camshaft with more valve timing. Very little (If any) is removed from the runners. The highest possible velocity at the port opening is what you want. * Thanks for sharing your expertise Jeff Luckey *Many porting pictures and explanations on the "Nopistons" web site. Free sign up.* ** *Any question anytime.* ** *Lynn E. Hanover* --00032555a7eec263c6047f229e0a Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Lynn,=20
=A0
You=92= ve probably forgotten more about engines that I will ever know!
=A0
I've forgotten more than I knew..........you could catch me..........= .
=A0
Based = on your quote above (I=92m probably dangerous w/ a die grinder), but the ki= nd of mods you are suggesting seem pretty straight forward.=A0 (besides, if= I screw it up, it only costs me a rotor housing ;)
=A0
My que= stions are:
=A0
Q1. = =A0If you start to reshape intake ports on a Renesis, how much can you do b= efore you get into the water jacket?
=A0
Thats why its called a program. You start off with a junk engine or two, = so anything you do will cost nothing. Get the same year and model as your f= inished engine, as there may be big changes year to year. One of the items = will be to drill many holes through the port areas, and measure thickness w= ith a wire with a hook on one end. Make a map with the depths marked on it.= Or, band saw the port areas out of the irons and section them about evey 1= /4 inch outside to inside. Mark each piece on a paper map. =
=A0
Lay out a duplicate of the map on your practice iron and grind out your p= ort. Now you can look at a segment of the sectioned iron and see how deep y= ou can go in each location.
=A0
=A0
Q2. = =A0In a well-engineered aircraft installation, how much HP is a Renesis mak= ing?=A0 In and RX-8 they are supposed to make about 225 HP.=A0 Are aircraft= installations getting that much?
=A0
Any RV- would look like a rocket with a real 225 HP engine. Since most ro= taries go about as fast as 160 HP "airplane engined" RVs, they pr= obably put out about 155 to 170 HP. A periphery port engine could be puting= out 200 to 210 or a bit more if in top tune.
=A0
Q3. If= mods that you suggest above are made to get intake/exhaust overlap, how mu= ch increase in HP can be expected in an aircraft installation?
=A0
Just a SWAG, but say we did the port job and added a real header, guess 1= 90-195 HP. Cooling loads go up, but if you can cool it reliability would no= t be a factor. Although we use carbon apex seals, reliabilty is not a facto= r at 9,600 RPM. But our "flights are onlt 45 minutes long and 8 or 9 p= er year.
=A0
I would use older 13B rotors and counter weights, then if you're not = happy with the power, you can go back in and do a really well thought out p= eriphery port and get well over 200 HP. Use 3MM ceramic seals.
=A0
The engine would look new inside for 10 years of flying. Ceramic and carb= on seals are very easy on the chrome. Run the OMP wide open and feed it a n= ame brand 2 cycle oil.
=A0
=A0
Porting is used to change the timing, like installing a camshaft with mor= e valve timing. Very little (If any) is removed from the runners. The highe= st possible velocity at the port opening is what you want. =
=A0
Thanks= for sharing your expertise
=A0
Jeff L= uckey
=A0
Many porting pictures and explanations on the "Nopistons"=A0 we= b site. Free sign up.
=A0
Any question anytime.
=A0
Lynn E. Hanover
=A0
=A0
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