X-Virus-Scanned: clean according to Sophos on Logan.com From: "Stephen Izett" Received: from mail-pa0-f51.google.com ([209.85.220.51] verified) by logan.com (CommuniGate Pro SMTP 6.1.5) with ESMTPS id 7995780 for flyrotary@lancaironline.net; Thu, 17 Sep 2015 01:21:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.51; envelope-from=steveize@gmail.com Received: by pacex6 with SMTP id ex6so10095446pac.0 for ; Wed, 16 Sep 2015 22:20:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:message-id:mime-version:subject:date:references :to:in-reply-to; bh=GpitlXCPhiNMgpZDyzCaUnT6Vs45cUJieejyAWP+kjg=; b=h9iNwUKfbmpFkB1N6L21eNaWT5I/M7eK2YSun3TWRKIU0VdKTJLe5+Sho4qP6nHka9 Kcg8qqaAZisB3Rd0aHP34lg2nJPziMyw4VauuK9QoyBfb4xIsnu1VJR7G5R7JmONAKOT /d4pGPAvi0O28nIOt+WdwXsFd05ekC7DuFAlfvyfNbbzw82kBtI1FKswSkUG0ZWKD7Sd Fx0ESnTABxD8XvJnTd8oHB98d+sPu3HEAszvBX7FoZ9N5EDaICU9ipQhv0sMLf7JZcwB gjTunbRVIEdTo7zCPQ5Kz0K9FqC/Gk/RVjrfzx+BBumaKJToZ8ftYYeCs9QGwgFRDa0Q DRuA== X-Received: by 10.68.166.196 with SMTP id zi4mr67791350pbb.83.1442467253292; Wed, 16 Sep 2015 22:20:53 -0700 (PDT) Return-Path: Received: from [192.168.0.6] ([58.108.8.220]) by smtp.gmail.com with ESMTPSA id df2sm1313785pad.19.2015.09.16.22.20.50 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 16 Sep 2015 22:20:52 -0700 (PDT) X-Google-Original-From: Stephen Izett Content-Type: multipart/alternative; boundary="Apple-Mail=_66138316-93FA-45FA-B8DF-7A7B23A25A45" Message-Id: <2F260F3C-A42D-438B-83AF-1901A0CB8CB0@icloud.com> Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2102\)) Subject: Re: [FlyRotary] New psru Date: Thu, 17 Sep 2015 13:20:47 +0800 References: To: Rotary motors in aircraft In-Reply-To: X-Mailer: Apple Mail (2.2102) --Apple-Mail=_66138316-93FA-45FA-B8DF-7A7B23A25A45 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Hi Neil I was one that benefited from Tracy=92s box, and so appreciate what you = are doing the the community. I once contemplated building my own to save costs! I can now see the huge amount of work required to bring a properly=20 engineered machine that meets its design parameters. Well done, great acheivement. What/how do you plan to test it? Cheers Steve Izett =20 > On 17 Sep 2015, at 12:28 pm, Neil Unger = wrote: >=20 > Gents, > Finally the first PSRU with a reduction of 3.12 to 1. = Pictured is the basic box which is heavily based on Tracy=92s PSRU but = with the larger reduction and 2 oil lubricated thrust bearings on the = prop shaft instead of a single sealed roller bearing in Tracy=92s. This = psru will mount directly in place of Tracy's 2.85 reduction PSRU with no = modification. > Now to put to test to see if the practice matches the theory. = Already found one fault. The =93O=94 ring seal that seals the main body = of the PSRU to the base that attaches to the mounting plate is outside = all the attachment bolts, which means that the oil can wick down the = bolts and make a lovely mess of your pride and joy. Now looking for = more faults as this is easily fixed. Unlike Tracy's , this PSRU is = totally sealed with O rings to ease dismantling with no clean up of = whatever gasket sealer you have had to use. > Now the terrible part and still undecided as I am yet to cost a = damper on the drive. Sadly it also is not cheap and may yet cost near = $500 for a =94bit of rubber=94. Then comes a mounting plate as made by = Geoff Doddridge which he sells for around $400 USD. There is no point = in me trying to compete with Geoff as he does a magnificent job at a = cheap price. Freight is always a horrible price so he makes the plate = and there is no freight from Aust to be added. > The total cost in Aust dollars (including Geoff=92s plate) will be = around the $5000 which equates to $3500 USD. Then freight of possibly = $200. Currently looking at further reduction in price if you source the = gear set locally saving on freight both ways to Aust and back. I will = have to alter the way it is constructed so that all the mods can be done = by you the builder. Still looking! > So far the progress. Neil. > <001 (Small).JPG>-- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html --Apple-Mail=_66138316-93FA-45FA-B8DF-7A7B23A25A45 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Hi Neil
I was one that benefited from Tracy=92s = box, and so appreciate what you are doing the the community.
I once contemplated building my own to save costs!
I can now see the huge amount of work required to bring a = properly 
engineered machine that meets its = design parameters.
Well done, great = acheivement.
What/how do you plan to test = it?

Cheers

Steve Izett
 
On = 17 Sep 2015, at 12:28 pm, Neil Unger <flyrotary@lancaironline.net> wrote:

Gents,
          &nb= sp;  =20 Finally the first PSRU with a reduction of 3.12  to 1.  = Pictured is=20 the basic box which is heavily based on Tracy=92s PSRU but with the = larger=20 reduction and 2 oil lubricated thrust   bearings on the prop = shaft=20 instead of a single sealed roller bearing in Tracy=92s.  This psru = will mount=20 directly in place of Tracy's 2.85 reduction PSRU with no = modification.
    Now to put to test to see if the = practice matches the=20 theory.  Already found one fault. The =93O=94 ring seal that seals = the main=20 body of the PSRU to the base that attaches to the mounting plate is = outside all=20 the attachment bolts, which means that the oil can wick down the bolts = and make=20 a lovely mess of your pride and joy.  Now looking for more faults = as this=20 is easily fixed.  Unlike Tracy's , this PSRU is totally sealed with = O rings=20 to ease dismantling with no clean up of whatever gasket sealer you have = had to=20 use.
    Now the terrible part and still = undecided as I am yet to=20 cost a damper on the drive.  Sadly it also is not cheap and may yet = cost=20 near $500 for a =94bit of rubber=94.  Then comes a mounting plate = as made by=20 Geoff Doddridge which he sells for around $400 USD.  There is no = point in=20 me trying to compete with Geoff as he does a magnificent job at a cheap=20= price.  Freight is always a horrible price so he makes the plate = and there=20 is  no freight from Aust to be added.
    The total cost in Aust dollars = (including Geoff=92s plate)=20 will be around the $5000 which equates to $3500 USD.  Then freight = of=20 possibly $200.  Currently looking at further reduction in price if = you=20 source the gear set locally saving on freight both ways to Aust and = back. =20 I will have to alter the way it is constructed so that all the mods can = be done=20 by you the builder.  Still looking!
    So far the progress. =20 Neil.
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Homepage:  http://www.flyrotary.com/
Archive and = UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html<= br class=3D"">

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