X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=aM2ykv1m c=1 sm=1 tr=0 a=Fn4HpnRQkMeKTtx/PkYqpg==:117 a=55z/sxGcUIPVrBMYBb4HRw==:17 a=IkcTkHD0fZMA:10 a=x7bEGLp0ZPQA:10 a=_Z_nqdSeG58A:10 a=KeKAF7QvOSUA:10 a=LNBTbJq0JTMIrpa8tQ4A:9 a=KyWGOGR8C3cwcydB:21 a=HKNZZkZGQ5ko4MnV:21 a=QEXdDO2ut3YA:10 From: "Neil Unger" Received: from mail-pg0-f53.google.com ([74.125.83.53] verified) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTPS id 10041331 for flyrotary@lancaironline.net; Wed, 23 Aug 2017 21:13:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.83.53; envelope-from=12348ung@gmail.com Received: by mail-pg0-f53.google.com with SMTP id y129so8091327pgy.4 for ; Wed, 23 Aug 2017 18:13:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-transfer-encoding:content-language; bh=c1LsMz1oxiPQudaedSuHlB/jGeJPbt1aeOowgKgJeJY=; b=ZmWkEoJAWd+Uync6nDD5SnVQQWAhLFGH0rZJjriHDp/v/PN8x1yJLal+w5OGBFNK00 Q2gCffDLrUU4NyGGR3gZoUdgDPuebs08ao3TXGMAzBD9dV7c8aWcId77iDA9G9ouqIF5 t1iAXQKQxpwqWk49E9Q+SaKBBAb4f9eqDG/Z3SVPjDljmRTUzhmlUYlYiUyXJ3/R4gLa XALLqQ7jiDNPVXd7oWw/7IoLO350Knsyw6uwFCG2b2b8S957efTUee9gIzoPfGq1gtlP Gv9gATEuf0B3+67pDTbvfr1/7QWZik3VoqYEkue6jBCni53Hi+Ng8GjnDufa8Gre/pSS 0TaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=c1LsMz1oxiPQudaedSuHlB/jGeJPbt1aeOowgKgJeJY=; b=QK+CpL3yGRcNbQNw4ixEaDB59aYam4GsPZL7IK4s9sxWQSUdhrTocmOpv+UW8zofmp 5a6NhLNQ5qHzkwHOeopX0/AjWIiyvQQRA02PxwzTmqtIef+Cx52VyOtXjkbt7PlBVYrb +ggqIB61h62LETsZcPAJSoBiyPkbM2ZnxYuaa9qRLdEvtifhd1XqBC1UXpXpZd8zSu4l eI+EDAgmIo62e+Tfh8dpYOtwzrH96tF3JN52sE1Tt6bX6bogGW9/yxHelkIbXM1CaTgq K8vEHl1SvSTyYouc3awdw0djwb+qw+1otWd/b5gpefiyeGiW09cMR7TbW/lGFMMA5TrK 04aQ== X-Gm-Message-State: AHYfb5jaKDp262B9P0WJJgBZqSq2WBMztd445guIL4olAO1a+6uOoCON E6OnZbuXwNy732gJq04= X-Received: by 10.84.216.75 with SMTP id f11mr5045008plj.444.1503537187693; Wed, 23 Aug 2017 18:13:07 -0700 (PDT) Return-Path: <12348ung@gmail.com> Received: from [192.168.0.103] ([103.198.24.78]) by smtp.gmail.com with ESMTPSA id w23sm4460750pfl.40.2017.08.23.18.13.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 23 Aug 2017 18:13:06 -0700 (PDT) To: Rotary motors in aircraft Subject: speed reduction pulleys Message-ID: Date: Thu, 24 Aug 2017 11:10:59 +1000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Gents,                  Due to my grief in having brand new reduction alloy pulleys not driving on a new fan belt, I located the manufacturer in China, and at much reduced prices.  Just go into Ebay under "Underspeed  pulley set for RX8".  However be prepared to either lathe off (or file)  the apexs of the pulley grooves as they are too high and the belt cannot bed into the wedges of the pulley for a positive drive.  Stock supplied,  they attempt to drive on the apex only and will not drive at all.  Reduction sizes are Eshaft and water pump  4 inches and alt is over 3 inches (80mm)  The advice I received is that for high speed applications the water pump can be as low as 3/4 the e shaft speed. That means you can go as low as a water pump pulley of 4 1/2 inches or 110 mm up to 115 mm. As I said these are cheap compared to local supply which come from China in the first place.  Neil.