X-Virus-Scanned: clean according to Sophos on Logan.com From: "Ernest Christley" Received: from nm27-vm3.bullet.mail.gq1.yahoo.com ([98.136.216.146] verified) by logan.com (CommuniGate Pro SMTP 6.1.14) with ESMTPS id 9386303 for flyrotary@lancaironline.net; Thu, 19 Jan 2017 22:34:21 -0500 Received-SPF: none receiver=logan.com; client-ip=98.136.216.146; envelope-from=echristley@att.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1484883242; bh=0GGuG7pT7mu1ky4H8mkgdu0oZXH5KiuI4znOKgY0KQY=; h=Date:From:Reply-To:To:In-Reply-To:References:Subject:From:Subject; b=XrDIdx+ybTRmBPOW1DiDPnaLgn56ZB/b2IUG3zCG9H6aWo8MaOFCGEikZl3hPR9Td/hSXC0/TbCxZsOrYR4r+MDIxre/NGO6ZSfqvLZBShx7S5SVHzP+ej0UDWWp/FOIVxWXPA6h64WcDMTmLyH0OE+Zvkn2/Sz7dXS2X4Yz9To= Received: from [98.137.12.58] by nm27.bullet.mail.gq1.yahoo.com with NNFMP; 20 Jan 2017 03:34:02 -0000 Received: from [98.137.12.245] by tm3.bullet.mail.gq1.yahoo.com with NNFMP; 20 Jan 2017 03:34:02 -0000 Received: from [127.0.0.1] by omp1053.mail.gq1.yahoo.com with NNFMP; 20 Jan 2017 03:34:02 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 723651.23212.bm@omp1053.mail.gq1.yahoo.com X-YMail-OSG: hobgm3AVM1lYZxmkHGyTitssZ8hHkcO4olSH8L3h5SauqDOq3qpK_Tr3Mae0SeY kcWNzxw2BGebGskMfLO0G2byeOzGo_JVVjXcB9qku11FNbhbs2mZFIdQIbzTgJdnwClYW7xjat5P xgNZ.iZmCuAsPQcxMrjOuS8NvN7x2GLbvbLxYFV5l0YvvEVoFfDm64rtppn9rNW6ht4S7BXjpOh5 Wgc_nJMRjhuo20FN9it3C0Yza2aEeGPelM_G639QP.YTwhhz_SpWoNtoYC9IC80Eg5Jt2G7.BY79 5_gsjzUQHKGff_pUuUhyNJ7f1QryLdZdof9k2aIGwdAfFnmTynl_5ughkzLKVOS8GpKDrO5xRJPN VOw8BjM9MEDR3L9tLY.wZT7eiF_OC25xptk64QVdI__AmxB1pmsZduW9vNBZfYLnTJqWJtRymn5G TDlazdw39PVa8bSqB9mBGojbQJjtRw.mrjr4idzmItzbNfCQvt4kntj0lKWqI55HubRf98RxR1ow lAuXe6VTxdMiWxKQljxyxz3mZ2SK995H3p7H0.6VlBKM1H209PHYhBZIQ9_3qcCWM Received: from jws300004.mail.gq1.yahoo.com by sendmailws134.mail.gq1.yahoo.com; Fri, 20 Jan 2017 03:34:02 +0000; 1484883242.361 Date: Fri, 20 Jan 2017 03:34:02 +0000 (UTC) Reply-To: Ernest Christley To: Rotary motors in aircraft Message-ID: <760955199.318967.1484883242115@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] IVO prop slip-ring improvements MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_318966_1231179141.1484883242114" Content-Length: 6100 ------=_Part_318966_1231179141.1484883242114 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Heh, I like those goofy little spinners.=C2=A0 Looking to fabricate one mys= elf over the weekend. =20 On Thursday, January 19, 2017 7:47 PM, Todd Bartrim wrote: =20 =C2=A0 I wasn't going to post anything about this until I'd run it and had= a proper test, but since you're all be so quiet... IVO props always get so= me people talking good or bad. Personally I feel they are good bang for the= buck, but they do have some shortcomings. One that always bugged me, no ac= tually I hated it, was the slip ring arrangement. I wish I had some current= pics of the original set-up, but those that are interested in this will pr= obably already know it well. It prevented use of the rear spinner bulkhead,= or required using IVO's goofy little spinner. I wanted to move the slip-ri= ngs to a mount on the backside of the rear spinner bulkhead. The pics at th= e link below, show what I did. https://goo.gl/photos/oV3uphNoCapBwPpE6 The first pic was just a proof-of-concept that I made on my wood lathe. Nex= t I made it out of a piece of micarta (electrical insulating board) which I= cut some grooves into then had some brass rings machined to fit. I drilled= and tapped a shallow screw hole into the back of each ring and have a bras= s stud insulated as it passes through the bulkhead. I also took apart the d= rive motor and replaced the lead wires with longer ones rather than just sp= licing and extension as due to centrifugal force, I didn't want even the ex= tra weight of a splice on those wires as well as the stress points of a spl= ice. I also didn't care for the IVO brushes and holder design, so I found t= hat the replacement brushes for a Honda generator are far more robust as we= ll as cheap and plentiful, I bought 5 for $5. So I redesigned this mount as= well.=C2=A0=C2=A0 =C2=A0As undoubtedly there will be some sharp eyes out t= here and will question this, the ring of rivets that hold the micarta to th= e bulkhead have several evenly spaced rivets that are inset closer to the o= uter slip ring. This was due to the original set of holes that I used when = I first mounted the ring, but before I determined the required ring diamete= rs. Also one rivet is missing as this is the location where the magnet is m= ounted for the prop speed sensor. Todd Bartrim C-FSTBRV9 13Bturbo =20 ------=_Part_318966_1231179141.1484883242114 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Heh, I like those goofy little spinners.  L= ooking to fabricate one myself over the weekend.


On Thursday, January 19, 2017 7:47 PM, Todd Bartrim <= flyrotary@lancaironline.net> wrote:


 = ; I wasn't going to post anything about this until I'd run it and had a pro= per test, but since you're all be so quiet... IVO props always get some peo= ple talking good or bad. Personally I feel they are good bang for the buck,= but they do have some shortcomings. One that always bugged me, no actually= I hated it, was the slip ring arrangement. I wish I had some current pics = of the original set-up, but those that are interested in this will probably= already know it well. It prevented use of the rear spinner bulkhead, or re= quired using IVO's goofy little spinner. I wanted to move the slip-rings to= a mount on the backside of the rear spinner bulkhead. The pics at the link= below, show what I did.


The first pic was j= ust a proof-of-concept that I made on my wood lathe. Next I made it out of = a piece of micarta (electrical insulating board) which I cut some grooves i= nto then had some brass rings machined to fit. I drilled and tapped a shall= ow screw hole into the back of each ring and have a brass stud insulated as= it passes through the bulkhead. I also took apart the drive motor and repl= aced the lead wires with longer ones rather than just splicing and extensio= n as due to centrifugal force, I didn't want even the extra weight of a spl= ice on those wires as well as the stress points of a splice. I also didn't = care for the IVO brushes and holder design, so I found that the replacement= brushes for a Honda generator are far more robust as well as cheap and ple= ntiful, I bought 5 for $5. So I redesigned this mount as well. 
<= div>   As undoubtedly there will be some sharp eyes out there and= will question this, the ring of rivets that hold the micarta to the bulkhe= ad have several evenly spaced rivets that are inset closer to the outer sli= p ring. This was due to the original set of holes that I used when I first = mounted the ring, but before I determined the required ring diameters. Also= one rivet is missing as this is the location where the magnet is mounted f= or the prop speed sensor.

Todd Bartrim
=
C-FSTB
RV9 13Bturbo


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