X-Virus-Scanned: clean according to Sophos on Logan.com From: "Charlie England" Received: from mail-ua0-f172.google.com ([209.85.217.172] verified) by logan.com (CommuniGate Pro SMTP 6.2c1) with ESMTPS id 9507536 for flyrotary@lancaironline.net; Sun, 26 Feb 2017 18:54:36 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.217.172; envelope-from=ceengland7@gmail.com Received: by mail-ua0-f172.google.com with SMTP id e4so6177828uae.0 for ; Sun, 26 Feb 2017 15:54:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=myyv41adz27KAyoIHsFA2kQDOYJmJe+4BGQSVxEqw8w=; b=ZpX2l8UZlopbTHIxOAqmoDXFZg5DcZ1OpluTZ2EVNRlcYa5OsjwcEX6jIZzsT/0uHx iih+E7/7r63zBeriCv7K6q0hUM8LdlKLeNsxCpStYXoym4AIeEG06bEIgplyjUgqKJJe VeRasHQpnvR07gxry8ZnIe1Zdy9eQVFyY/Htc1fquu+rVSxnjPURx3x1T6QAz4A4LsLH 7P1EfKxQgNLg3klpstXVGYuzzVPYR1StXDHDHJ583ni7zDJjPGtY4e0O0oHvsP5BZdBm K9OctsTyw1DHmMhYyHaz+WWc2hScCNUiD7D+1fbAirNxcnUnlbdlylL5rYe30KvUTM66 ZBzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=myyv41adz27KAyoIHsFA2kQDOYJmJe+4BGQSVxEqw8w=; b=MOqR4yjdt+U5YrBjmE7Cgt46LK8C7Ukn5jeuWVEno4YOtspdZU/XZanr5jFxknLN/f UTdtHybwwn0CqfJa6jNPLhdjnMvIfF6a21NiaLMY+yCnebpqHkFbO1DEnBS/cwvAyFtV eSquzECcr0fXA0Q6KVmCNGXUHMKv7dGL3F1sDUlStzGLSm2WCWzCUQ1+BEwMSYwnw5bI WwXRuz7aSjRXnLSXim9vYG7+xMNpzlTCNu8iG3SXXrVXH7f2XeJ82ntQw4IIYEFUPOSo Ghcat7RCGUxg3X63AdAA3xwIOHy1jg+43zyfGNdAHYWUfqY7FMsLZjDQs3fRxiY1dGxR HUyw== X-Gm-Message-State: AMke39mpCzlSk42DdjuV9EDdGNjsmAfxojDyNY0wTJdWTxBotdgBZj6RTNWdcm56uBbY4R2+OouDqlRFIHGA3Q== X-Received: by 10.31.198.199 with SMTP id w190mr4839574vkf.28.1488153259072; Sun, 26 Feb 2017 15:54:19 -0800 (PST) MIME-Version: 1.0 Received: by 10.103.147.156 with HTTP; Sun, 26 Feb 2017 15:54:18 -0800 (PST) In-Reply-To: References: Date: Sun, 26 Feb 2017 17:54:18 -0600 Message-ID: Subject: Re: [FlyRotary] Re: Boost Port Carb Efficiency To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a11484c4e60e498054977aec2 --001a11484c4e60e498054977aec2 Content-Type: text/plain; charset=UTF-8 On Sun, Feb 26, 2017 at 2:06 PM, durabol35@yahoo.com < flyrotary@lancaironline.net> wrote: > Okay, I thought P-porting just meant using all six intake ports. > > I am doing an original design so I can design for the engine weight. > I've been in the research phase for the last 15 years but hope to start > construction soon. > > I like the idea of using more power but there are a lot of advantages to > limiting it as well. I looked into a single rotor engine but found it > pretty > expensive to go that route. > > As far as "Hate to sound like a downer, but..." I welcome constructive > critisism and sometimes I need to be clued in. > > Brock > > P is short for 'peripheral' port. It means to bore a hole in each rotor housing, *roughly* the same height above the top plug as the exhaust port (on a 13B) is below the bottom plug. If you do this, the 'side' intake ports are typically closed off with ...well, they're filled in. P ports give absolute maximum breathing at the upper end of the rpm spectrum. Bill, who mentioned them earlier, is working on a version optimized for around 6K rpm, but that's still way above what you're considering. As a point of reference, one of the members here has tested a Renesis '6 port' engine (early ones came in both 4 & 6 intake port versions), and found that below 6K rpm, it actually made more power with the '3rdary' ports left blocked (operating as a 4 port). This makes sense, since that's what Mazda does with the intake manifold valving in the car. The 'cut down' 13B to one rotor will still weigh almost as much as the stock motor (probably 3/4 as much; not half), unless you do what Richard Sohn has done and make aluminum end housings for it. Now you're *really* talking serious mods. If you're doing your own design airframe, then a lot of things are possible. The Pietenpol Air Camper flew with a water cooled Ford Model A engine, which probably made 35 HP on a good day & the FWF probably weighed close to what a 13B installation weighs. Show us what you're designing! Charlie --001a11484c4e60e498054977aec2 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Sun, Feb 26, 2017 at 2:06 PM, durabol35@yahoo.com <flyrotary@lancaironline.net> wrote:
Okay, I thought P-porting just meant us= ing all six intake ports.

I am doing an original design so I can = design for the engine weight.
I've been in the research phas= e for the last 15 years but hope to start
construction soon.

I like the idea of using more power but there are a lot of advantage= s to
limiting it as well. I looked into a single rotor engine bu= t found it pretty
expensive to go that route.

As far a= s "Hate to sound like a downer, but..." I welcome constructive
critisism and sometimes I need to be clued in.

= Brock

P is short for 'p= eripheral' port. It means to bore a hole in each rotor housing, *roughl= y* the same height above the top plug as the exhaust port (on a 13B) is bel= ow the bottom plug. If you do this, the 'side' intake ports are typ= ically closed off with ...well, they're filled in. P ports give absolut= e maximum breathing at the upper end of the rpm spectrum. Bill, who mention= ed them earlier, is working on a version optimized for around 6K rpm, but t= hat's still way above what you're considering.

As a point of reference, o= ne of the members here has tested a Renesis '6 port' engine (early = ones came in both 4 & 6 intake port versions), and found that below 6K = rpm, it actually made more power with the '3rdary' ports left block= ed (operating as a 4 port). This makes sense, since that's what Mazda d= oes with the intake manifold valving in the car. =C2=A0

The 'cut down' 13= B to one rotor will still weigh almost as much as the stock motor (probably= 3/4 as much; not half), unless you do what Richard Sohn has done and make = aluminum end housings for it. Now you're *really* talking serious mods.= =C2=A0

If you're doing your own design airframe, then a lot of things are pos= sible. The Pietenpol Air Camper flew with a water cooled Ford Model A engin= e, which probably made 35 HP on a good day & the FWF probably weighed c= lose to what a 13B installation weighs. Show us what you're designing!<= /div>

Charli= e
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