X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=EuKsUhUA c=1 sm=1 tr=0 a=FRIVNl6ejNASCn8GnJoiJQ==:117 a=reM5J-MqmosA:10 a=BPxo3any_xkA:10 a=o1OHuDzbAAAA:8 a=htJboqBXAAAA:20 a=UretUmmEAAAA:8 a=_6GpL_ENAAAA:8 a=fMw1tffrvAIcQKCulp8A:9 a=3uBRPzlaBFbwNqC0:21 a=K4yeEwAquxSq1_Za:21 a=QEXdDO2ut3YA:10 a=G16uPLUT-aoA:10 a=WWdoAFtmz4sA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=Ia-xEzejAAAA:8 a=syXhsFpezva5cZhAteQA:9 a=auQUWeQ60-THnjUB:21 a=52YRVM-R9IoCxgpk:21 a=lNTqE9ZpzT4CFRjG:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=W8ajF5jvLdG4-rt1DGEw:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=pHzHmUro8NiASowvMSCR:22 a=nt3jZW36AmriUCFCBwmW:22 From: "Bill Bradburry bbradburry@verizon.net" Received: from sonic306-22.consmr.mail.ne1.yahoo.com ([66.163.189.84] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 753900 for flyrotary@lancaironline.net; Tue, 15 Sep 2020 21:21:09 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.163.189.84; envelope-from=billbradburry@verizon.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=verizon.net; s=a2048; t=1600219253; bh=yoS+bxc79Pn4O7oUeDFP7L2BWx5N6/JFsJsDEaALVHw=; h=To:From:Subject:Date:In-Reply-To:References:From:Subject; b=bNJNDkY9WgvhbwCnY8PStsdOuDSoUyFAJx175jE2hmbB4wGdEDuOyxfcb4SpnctV0IvmGwlXbBcCPk9SsbRr4g0hkgfGxucteX+IdH0zo8Dc0HAbUw7Xh4KL9C4ldufigeatenqPGM7ggcpBfh9Z6xhD3Bm9Gk8i6UCR6ihxY/4ajZguoSA3wa85il0CANSc86QwU4HfoAXz+e259myejKOVpNdqJEPsPiteOxbMmA61cA/XEMiemtbVmMHcdQHptIDqlNe6JXBZj5NZJMm+j4U0mdROXmlHsuBYVbf87rzvd4Y56enp8hnAfOzN2hgU08YuOLcY674HmMXc/s+BUw== X-YMail-OSG: rXv7lt0VM1l0o6XnOYnYb0Ecmj15e01N4boblJnIFNFhL_emjheqX8kWt7hEBYl WUYN7O.C_d7ZFcrgId9bVOUW2HOXX7fSxQWpM.1VOCKi2GbNFrwwhTwiVnObcJEoSUvSoUEJEFbF d0KZ5KWid_xUdUQUuI6875doIfVC6b._N0lwakz8YIXdG5QAYvRq91KcH3WrqpNLzVhfj5FTxkpA RnDlrFDPvvfxANJ0Dvax_yHY2Lt2L3WTSbE4a0Vca_IBmDUQaCRQOIeE8ZH7J8V7NgLXe.fEwt0g fZq.W2UOd6avi8fjjaeBGVf9Ono57MWOd4RQe_RQdGmFLi18WZxkm6mchcFDI0bd3foTDULBK2an c6huG0bOt4ka0ANwm6Jo3a8FvdYXwztkWnnMbc3YDbEiVBqdmIMuZ.K2asHSgwHNz0l6Wf2UR6Jc R2FtgU4THtTdTRl6bADqWmT8O6Ka8vOEhQt45AQMySB7o5tJg2c0e3t29GKDmVDCHJ5X_kSrzX3F K6c26a9GLklPXrVmCZwK8z9qj1m0eGAhWeBwOzZrIfDZxapcY_rJYCCuZPhc_nbvPxUabYcBqOLf PwR2NIq8vZt6f_gmaB0Yc3cl8bLGXPG1JRHdaNo0LGxcv7_s7LHbQzS13kOkvItGBYgWKRhF1zUx u3xttpGXFsNf_s.DpMgJdvVwt_KP6NfwgvRcpY2CioUhYNHOVn3gzl7Gh8eNxq7cJomFg48k1KOs l7RpUtSoZGODl7Dsn0WziYOh0rAo3t2DwDS4MnyreQW3qhYp6rG0Pzv2gSpBCl6KIkjuGmBL8N04 KAn8lJG4Bq8kjizacXkxmkudbosyVZyz.GsPzA5ouWFEG.7J1h20AUCSl6.WR._vRWTL7xYhxBGJ iOg4BwT8fJ_uwdE_4m3dXuPGfhNkpbEDbTHIWBT0oF8WGiAZqs4380jcAmSL2d8jfABAuWHl9CPI XdazW4TVPH8fk98ccw6SMJ5BoVpE4JhpOMUpxoFeWNfOxK0WkjJlrsvub91wQfAdjBOw.JAL61.9 .MM1e8FhhaliXurDe16ykMYiU59uWLlNDfdfFKVoOcYChRWujRGx0J3zzUcdvAT4MUEVnZscLEua WcqMs1yjz7exGmmSYHwcK70o2k4juUeUpzlfH0eoZQoxxJy7g1.IfhG5ZYmcszGRtjvaKsPPZJ8l PbfVlg6TXVDJTEgaqA8iY4lHPeeA4fDOmPbjwHCZ0Si1qNzPaGxZjPtN78Hf_5eFU0zWHbZ3SZa_ mBoUCbJMlK3Jyp0Hwsw5AeuGf_fywaeRp2bpP8QetZQTVEKSMwwcDxS1Zb9CHMp2FAtAjRb8EErR uyy1Zxh_sG4U4hxmfXiMKIlcc.yeXz2OP6MYYw5Or.OuIGBf.gPm2Og0P1CKJ3uQVIRZ0SJVtj_X VgoHwvB6spiGDFR9WejQ9zE21lsakYepjixinCf6mc61Mx7BD6NvBkkMt0IQ15.xj.XP0M_knh94 jdBObjxsC_9sb5RNo9.EVjI22b_.IwXFwc.4.hbUFt_owuiFBYQ1_zn2TmYw- Received: from sonic.gate.mail.ne1.yahoo.com by sonic306.consmr.mail.ne1.yahoo.com with HTTP; Wed, 16 Sep 2020 01:20:53 +0000 Received: by smtp406.mail.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 86ecedaf3472b90cb1f98900f9c54aeb; Wed, 16 Sep 2020 01:20:51 +0000 (UTC) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: RE: [FlyRotary] RV-4 prop Date: Tue, 15 Sep 2020 20:20:50 -0500 Importance: normal X-Priority: 3 In-Reply-To: References: Content-Type: multipart/alternative; boundary="_9F58AA2E-83E9-4B3C-8DF5-D8F3EC888DAF_" X-Mailer: WebService/1.1.16583 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol Apache-HttpAsyncClient/4.1.4 (Java/11.0.7) Content-Length: 9718 Message-ID: --_9F58AA2E-83E9-4B3C-8DF5-D8F3EC888DAF_ Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Finn, It is really not too late. Frank told me that a prop in my condition was w= orth $1000, but I want only $700 for it. That includes the crush plate and= bolts. That brings the total cost of the prop down to probably around $60= 0. It is 76 inches long and needs to be cut down to at least 74=E2=80=9D. = You can do that yourself. You don=E2=80=99t really HAVE to get the rain e= dge installed. That would save you the $700 that Frank is charging for tha= t service. And maybe even Ed Sterba could do it for you. Think about it. = =20 Worst case you would have a brand new $2600 prop for $1400! Not a bad deal= anyway you cut it. Bill=20 Sent from Mail for Windows 10 From: Finn Lassen finn.lassen@verizon.net Sent: Tuesday, September 15, 2020 7:58 PM To: Rotary motors in aircraft Subject: [FlyRotary] RV-4 prop 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 don'= t use a duplicating machine, all props are hand carved and I'm getting olde= r 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 fin= ish his prop (that's normally included in the price). I paid $875 in 1999 f= or my RV-3 Performance prop, so that 300% inflation. That's going to bust m= y $20,000 budget. Any ideas for a cheaper prop? I was thinking about building a prop duplicator and duplicating my RV-3B pr= op (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= /http://rotaryaviation.com/renesis_engine.htm]: "Clark at Performance Props was very honest about the=C2=A0difficulty=C2=A0= in 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 inst= ead of 2.17:1], the prop must not only be long but has to have a good profi= le 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" =0DVirus-free. www.avast.com =0D --_9F58AA2E-83E9-4B3C-8DF5-D8F3EC888DAF_ Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"

Finn,

It is = really not too late.=C2=A0 Frank told me that a prop in my condition was wo= rth $1000, but I want only $700 for it.=C2=A0 That includes the crush plate= and bolts.=C2=A0 That brings the total cost of the prop down to probably a= round $600.=C2=A0 It is 76 inches long and needs to be cut down to at least= 74=E2=80=9D.=C2=A0 You can do that yourself.=C2=A0 You don=E2=80=99t reall= y HAVE to get the rain edge installed.=C2=A0 That would save you the $700 t= hat Frank is charging for that service.=C2=A0 And maybe even Ed Sterba coul= d do it for you.=C2=A0 Think about it.=C2=A0

=  

Worst case you would have a brand new = $2600 prop for $1400!=C2=A0 Not a bad deal anyway you cut it.

 

Bill

 

Sent from Mail for Windows 10

=

 

 

After sending the below, Ed Sterba replied:

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 P= erformance prop, so that 300% inflation. That's going to bust my $20,000 bu= dget.

Any ideas for a cheaper prop?

I was thinking about buil= ding 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

Instal= lation will be quite similar to Tracy Crook's RV-4.
Here are some of his= notes [from https://web.archive.org/web/2011112007= 3159/http://rotaryaviation.com/renesis_engine.htm]:
"Clark at Performance Props was very ho= nest about the difficulty in getting the proper pitch at the blad= e root (out to ~ 3" past the 13" dia. spinner) with pitch th= is high. [88" ?]
Other conclusions are that anything less than 74" L prop is a wast= e on the -C [2.85:1] drive.
I must emphasize that in order for this to work [2.85:1 gear redu= ction 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 p= itch.  I worked with Clark at Performance Props and emphasized this.&n= bsp; 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,&nb= sp; less performance, higher fuel burn and higher wear.  Tracy"

 

=

Virus-free. www.avast.com

 

 

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