X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=EuKsUhUA c=1 sm=1 tr=0 a=oPnhuI2MPlxaz3oCnLHVkg==:117 a=reM5J-MqmosA:10 a=BPxo3any_xkA:10 a=o1OHuDzbAAAA:8 a=Ia-xEzejAAAA:8 a=htJboqBXAAAA:20 a=UretUmmEAAAA:8 a=_6GpL_ENAAAA:8 a=bfMwxjdB0q87jZoGirEA:9 a=QEXdDO2ut3YA:10 a=WWdoAFtmz4sA:10 a=0n9Ua0LSxl_vpW-ML4EA:9 a=CSdkraaZG05zY7t-:21 a=_W_S_7VecoQA:10 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=W8ajF5jvLdG4-rt1DGEw:22 a=pHzHmUro8NiASowvMSCR:22 a=nt3jZW36AmriUCFCBwmW:22 From: "Ernest Christley echristley@att.net" Received: from sonic314-22.consmr.mail.gq1.yahoo.com ([98.137.69.85] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 754567 for flyrotary@lancaironline.net; Wed, 16 Sep 2020 08:45:52 -0400 Received-SPF: none receiver=logan.com; client-ip=98.137.69.85; envelope-from=echristley@att.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1600260334; bh=BZSVKkWLDVmugIU0kJWXGcJuxllSsv1W2hEf7lZk22w=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=SzGUMn8dWBauDjI9A9X91zRgKucYEakFcWdv2ASANk/3zJWHcntfgJBacnSL/oG8nfd09YsYKOUzG5UEPB9k1sNsdV5KbwLYMb9XSqvwyqcjZGZKOigUnzAn9mSQxrsqehZLvcSiqIVM7E7ca/q5x2KochR3wEiQmKeTpEnnONU= X-YMail-OSG: zreZbagVM1nopaUeLVTPfQkJZjjQF39vpi2I0q7Io2I1BheDuxU94tl7rJE1HeV gizjiV_xy7Ej0lyyOmfmgG9nQnzEr1I05BFR4PRGOjGWPIVSL3cNPdzu9SVEQto8Cr6CkcI_C5l9 acNbhI_LA7o_tiNJQ2ZC21zmHQBiXHeqqbMVpjH6TJxj0mapT97cy0xWm.ISW3Jw9RoxYNvX9C6e prIcWMHQM7C8gFEn3Ab8H.3rlPp2X2sVJcTe8qJ0Vzwqjfn2jsK6kTyW86tHDr9bC6J2PWrZEpiR ZVoZRmzfoxN6lgMKCy5dOhWdvPRtfrQ6bBvwfVlKc4z4vCNh0KGjkznvSQsYQ8alVLqE2f09fWZE ba04sMeqxOBhy8IrD5q6c.KQyZfmrCSaxZUYLk6qd6lEj9KFXJmFUZCclmNmxf44w.IOH4aeYcKg XiYbucQZLDY5LRfNw9lduSlqbFBwpgg9qLWaEIXfezJCwxrfJecwlWudkSnvQI1_iHmgnhCkseIJ EVyVEAVfF2V8tZSH3kxMi9nvQcOs7KsE5H3YnyjVqkjVSxhTpWL_vJTGAhuGvl7pOYzDiPXG0kZt n0uvlMy6_GTrtiHgIJUHgXEmk.UttSlMtJoSGF.xyqt1qBI7ew80TbQ1DLlGsSdMDv8_9wAqKaoZ 4N2DlahoLN.zYtOd5UYfHZDUZuOQ94upjGriqF6q4OngmKhM7xFSjRJrwvE_L0uqPGo_RBm.juC5 SZaReyxnzs0_ApQ.XcM2Ls_m_46Pyqa85blpAqVD7cTdaj014CfqEos8ShzzAfylyue6kDF81NBS PPzUoOqz0oFOmFf4MM0IRSnAt2OvGhGrJ373I07rCKyAA3Fq_VIBg7V8WOC9IAdYTNAk8WFU3Qcw YvHBA69Onm.SxMsbaQF2jdJbB_uS9UdDJYhec9ObPH79m2EwVVA4yZantEiUdVmMLfTBb34mTfI6 YBMQ49xJmMpiMEhYLBJclh81XeNIadx.vr.RHvQbTcSHIR5t0DBRHMqjwzp0TBTo8O_SXRd6LkM4 BLXvVhL9Tn6R8WZb1QM2gJAy_cA4IXEBWvgowZHYDp.B5B9h66IJ2q1F_.9EgP63byx1D9BHnHBF Z_60SqQyr3Op2ASIlx9duaZsbV4ZjFDH2DwiwWI0vmPdvHjuq8EPCCjb5FCeO.aguref51Fo6_pP WfUzLSTc_qK8iB9avtDuZfTsSDHK0OsQ0M3gE4O7fVjulA7wcTj5dlaxUlezr8RZD345Z.4teog4 xb_SXO9GedblYCuhBIS2hSP8F5DLIkxbt9iAXFIzmcwgzn2BSCXfiP4GwiIkBlcd5gq18tCl31o4 tDEFhDQCL89zz0Z2GlTFloYC8cnKG58UQbCsiv_xK2baKaj4Ii8U1dhf7wXVZLyterdiF3xOzio1 IHyVuNJ.6n2rsgH6ZFQGKl.dNR8wq6Cgz1Z.NLKsJhZoZUnAN9WrDHuGK Received: from sonic.gate.mail.ne1.yahoo.com by sonic314.consmr.mail.gq1.yahoo.com with HTTP; Wed, 16 Sep 2020 12:45:34 +0000 Date: Wed, 16 Sep 2020 12:45:30 +0000 (UTC) To: "Finn Lassen finn.lassen@verizon.net" Message-ID: <996749702.5071975.1600260330651@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] RV-4 prop MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5071974_732281241.1600260330650" X-Mailer: WebService/1.1.16583 YMailNorrin Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0 Content-Length: 7642 ------=_Part_5071974_732281241.1600260330650 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Laminating would is not that difficult.=C2=A0 Match the grain.=C2=A0 Sand = it to cut the wax off.=C2=A0 Use too much glue and clamp with rubber bands.= After the prop is carved, lay on enough layers of fiberglass that you never= worry about the reliability. On Tuesday, September 15, 2020, 8:58:29 PM EDT, Finn Lassen finn.lassen= @verizon.net wrote: =20 =20 =20 After sending the below, Ed Sterba replied: "I'm not sure I will be able top make you a prop at this time.=C2=A0 I do= n't use a duplicating machine, all props are hand carved and I'm getting ol= der and having difficulty carving the bigger ones. Ed" =20 So there goes my plan for a $650 prop. =20 Performance props are now $2,700 according to Bill B. They want $700 to fi= nish his prop (that's normally included in the price). I paid $875 in 1999 = for my RV-3 Performance prop, so that 300% inflation. That's going to bust = my $20,000 budget. =20 Any ideas for a cheaper prop? =20 I was thinking about building a prop duplicator and duplicating my RV-3B p= rop (or Tracy's RV-4 prop if I can borrow it). But where does one get 4 3/4= " prop blanks or wood? Not sure I trust my ability to laminate wood... =20 Finn =20 Installation will be quite similar to Tracy Crook's RV-4. Here are some of his notes [fromhttps://web.archive.org/web/20111120073159= /http://rotaryaviation.com/renesis_engine.htm]: "Clark at Performance Props was very honest about the=C2=A0difficulty=C2= =A0in getting the proper pitch at the blade root (out to ~ 3"=C2=A0past the= 13" dia. spinner) with pitch this high. [88" ?] Other conclusions are that anything less than 74" L prop is a waste on the= -C [2.85:1] drive. I must emphasize that in order for this to work [2.85:1 gear reduction ins= tead of 2.17:1], the prop must not only be long but has to have a good prof= ile as far down toward the root as possible with the MUCH higher pitch.=C2= =A0 I worked with Clark at Performance Props and emphasized this.=C2=A0 It = required a thicker than standard [4-3/8=E2=80=9D] hub to get close to what= was needed. If you don't do these things, all you get is significantly higher rpm,=C2= =A0 less performance, higher fuel burn and higher wear.=C2=A0 Tracy" =20 =20 | | Virus-free. www.avast.com | =20 ------=_Part_5071974_732281241.1600260330650 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Laminating would is not that= difficult.  Match the grain.  Sand it to cut the wax off.  = Use too much glue and clamp with rubber bands.
After the prop is carved, lay on enough layers of fiberglas= s that you never worry about the reliability.

=20
=20
On Tuesday, September 15, 2020, 8:58:29 PM EDT, Finn La= ssen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:


=20 =20 =20

After sending the below, Ed Sterba replied:

"I'm not sure I will be able top make you a prop at this time.  = I don't use a duplicating machine, all props are hand carved and I'm getting older and having difficulty carving the bigger ones.
Ed"

So there goes my plan for a $650 prop.

Performance props are now $2,700 according to Bill B. They want $700 to finish his prop (that's normally included in the price). I paid $875 in 1999 for my RV-3 Performance prop, so that 300% inflation. That's going to bust my $20,000 budget.

Any ideas for a cheaper prop?

I was thinking about building a prop duplicator and duplicating my RV-3B prop (or Tracy's RV-4 prop if I can borrow it). But where does one get 4 3/4" prop blanks or wood? Not sure I trust my ability to laminate wood...

Finn

Installation will be quite similar to Tracy Crook's RV-4.
Here are some of his notes [from https://web.archive.org/web/20111120073159/ht= tp://rotaryaviation.com/renesis_engine.htm]:
"Clark at Performance Props was very honest about the difficulty in getting the proper pitch a= t the blade root (out to ~ 3" past the 13" dia. spinner) with pitch this high. [88" ?]
Other conclusions are that anything less than 74" L prop is a waste on the -C [2.85:1] drive. I mus= t emphasize that in order for this to work [2.85:1 gear reduction instead of 2.17:1], the prop must not only be long but has to have a good profile as far down toward the root as possible with the MUCH higher pitch.  I worked with Clark at Performance Props and emphasized this.  It required a thicke= r than standard [4-3/8=E2=80=9D] hub to get close to what was needed.
If you don't do these things, all you get is significantly higher rpm,  less performance, higher fuel burn and higher wear.  Tracy"


=09 =09=09 =09
3D""Virus-free. <= a rel=3D"nofollow" target=3D"_blank" href=3D"https://www.avast.com/sig-emai= l?utm_medium=3Demail&utm_source=3Dlink&utm_campaign=3Dsig-email&= ;utm_content=3Demailclient&utm_term=3Dlink" style=3D"color:#4453ea;">ww= w.avast.com =09=09
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