X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm32-vm5.bullet.mail.ne1.yahoo.com ([98.138.229.53] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with SMTP id 5511870 for flyrotary@lancaironline.net; Fri, 27 Apr 2012 10:59:32 -0400 Received-SPF: none receiver=logan.com; client-ip=98.138.229.53; envelope-from=kjohnsondds@yahoo.com Received: from [98.138.90.52] by nm32.bullet.mail.ne1.yahoo.com with NNFMP; 27 Apr 2012 14:58:55 -0000 Received: from [98.138.88.239] by tm5.bullet.mail.ne1.yahoo.com with NNFMP; 27 Apr 2012 14:58:55 -0000 Received: from [127.0.0.1] by omp1039.mail.ne1.yahoo.com with NNFMP; 27 Apr 2012 14:58:55 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 821902.49312.bm@omp1039.mail.ne1.yahoo.com Received: (qmail 21891 invoked by uid 60001); 27 Apr 2012 14:58:55 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1335538735; bh=aHq2lbh8bNv51zr1prLCrVxEhAtByBaxiBjg+OLehYY=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=dZPxu36Nc7V8lZk1X7f/aDeJn9GjPnaDmSlJopwu7zlNcwhjcaj7u7lYqMnWGQfna/3tusckFne8XFt9JUL9ENFnjaPHHGFLBPuZmKqe9xlFrs4Y+dbh1sVuvC09CB0LtKMdQbal7GW+1mkBxfigPnjQmYiYxKWY/Y3M0MFddBE= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=rSXe9MesWGEu39Kthj8yHnfMEkxAkggbR+ikMEKYbj60p+RdL6yD7J75AFcwzYEc/OOKOP1quie4Z4djLToRpLM7ftJ8hpOyGOrLxKzHPMP7VJpDwocXaZv5yVaW+VptK01GZQx9l5asVVyodXBzhtQ+/y+wXI10kZFVzdJrj1I=; X-YMail-OSG: qMJZWSUVM1l.AYtbCoskBmZ9e5K.iL0LNU9dQRnEEqPdK8z 22lv8DZgwWVXrjj14NA9.TKYi97y6H9g0ajTjoBxlolbVfvfy82YE0kbwwlT Ah_IEl5G79BK9Q83uDmrsJGlTghvQxcuVHR0uIFdzZPUuYJm4xEv3wpi_hJW SeRHuBAuovLBpwRk312_tAcyqJD5BhZM97_xE7XWcNApkAzbGGyxbHKKbGM_ 1No44m8VWEk0JKl643u3bQSGQxMoyKXFx0FNS6D7OIuojH892RvVwIGdTUgN ACzcf6ltLMS6J0OqyUDhLQLePc5iRXf2GX6ALUlFcbrv1u_qQo8nPF5hwkVu cbs4.WGyLn2IqqsVa22QZZjMoV859PTg7quhSVSxQoI.1Wd2hYmHUjaHL_ft D16bZBNckVh7Es395JHrWiVMUeUsTweNMLQJE.6jxioVpl.d0ds1kDeqy5BL 68HA8WETgkaT4OsyRDm.i00ebW4Jlp2ATln4TKuC2pOMD.SRK7pFoFEu9e3k F4q_kXh4F9z.u72qscLTFEf.VZuZSsqBtcPE- Received: from [66.168.8.63] by web120303.mail.ne1.yahoo.com via HTTP; Fri, 27 Apr 2012 07:58:55 PDT X-Mailer: YahooMailWebService/0.8.117.340979 References: Message-ID: <1335538735.89296.YahooMailNeo@web120303.mail.ne1.yahoo.com> Date: Fri, 27 Apr 2012 07:58:55 -0700 (PDT) From: Kenneth Johnson Reply-To: Kenneth Johnson Subject: Re: [FlyRotary] Re: Fixed Pitch props. To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="983643977-1492732640-1335538735=:89296" --983643977-1492732640-1335538735=:89296 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable I can not offer much as far as technical performance, but have you consider= ed an Ivo prop with an in flight electrical adjustable prop?=C2=A0 =0A=0A= =0A=0A________________________________=0A From: Thomas Giddings =0ATo: Rotary motors in aircraft = =0ASent: Thursday, April 26, 2012 9:04 AM=0ASubject: [FlyRotary] Re: Fixed = Pitch props.=0A =0A=0AI have a Marcotte 2.4/1 PSRU. It is rated at the righ= t HP for my application. Should be good there. You are right about Tracy's = PSRU. Will not work for this.I have an option for a constant speed ,but YIK= ES!!! It is pricey. I will get it if I have too,but am looking at every oth= er option before I go down swinging on this one.=0A=0AKIND REGARDS=0AThomas= Giddings=0An360tg@earthlink.net=0A727 858 1772=0A=0A=0A=0AOn Apr 26, 2012,= at 9:38 AM, Bill Bradburry wrote:=0A=0A =0A>Tom,=0A>What engine/PSRU are y= ou planning to put=0Ain your Venture?=C2=A0 It seems to me that you are goi= ng to have to do some thinking=0Aabout this combination if you plan to use = a Mazda engine.=0A>=C2=A0=0A>If you use Tracy =E2=80=99s RD1-C, you will be= limited to=0Aabout 2450 rpm prop speed (7000 engine) on take off and about= 2100 rpm prop=0Aspeed (6000 engine) in cruise.=C2=A0 That means a heck of = a lot of pitch to get a=0Acruise speed of 240 knots!=C2=A0 I think that wou= ld work out to around 138 inches of=0Apitch.=C2=A0 On takeoff, you would pr= obably think the prop was feathered!=0A>=C2=A0=0A>Tracy=E2=80=99s RD1-A or = B has a ratio of 2.17 and turns backward to=0Anormal aircraft, but I don=E2= =80=99t know if he has them rated at high HP. =0A>=C2=A0=0A>You may want to= try and buy a Mistral PSRU=0Aso you can fit a constant speed prop of some = kind.=C2=A0 I don=E2=80=99t know if that=0Ais even possible??=0A>=C2=A0=0A>= I hope this msg will =C2=A0generate some=0Acomments from people with more k= nowledge about this than I and maybe they will=0Ahave some nuggets you can = use.=0A>=C2=A0=0A>Bill B=0A>=C2=A0=0A>=0A>________________________________= =0A> =0A>From:Rotary motors in aircraft =0A[mailto:flyrotary@lancaironline.= net] On=0ABehalf Of Thomas Giddings=0A>Sent: Thursday, April 26, 2012=0A7:1= 4 AM=0A>To: Rotary motors in aircraft=0A>Subject: [FlyRotary] Re: Fixed=0AP= itch props.=0A>=C2=A0=0A>Thanks for your info. I did contact Craig Catto an= d here is his=0Aresponse:=0A>=C2=A0=0A>Hello Tom,=0A>That is going to be=0A= quite a challenge to fit.=C2=A0=C2=A0 We make them for the 540 Berkut, and = that=0Ais about a 285mph aircraft and have done one for a E-racer turbo 540= at 350HP=0Adoing over 300mph.=0A>I do not think I=0Awant to challenge the = auto conversion, just the power curve many times seems=0Ahard to fit. We kn= ow the curve of the Lyc engine very well and so not such a=0Abig deal to fi= t in these types of applications.=C2=A0 Easiest way for you to=0Afit it is = probably with a MT.=0A>All the best,=0A>Craig=0A>=C2=A0=0A>I was=0Asurprise= d at his answer as i thought he did Tracy 's prop. The speed of the Venture= will=0Anot be that much more then what he described. It may be the high HP= I will be=0Ausing.Any more suggestions would be appreciated.=0A>=0A>=0A>= =0A>KIND REGARDS=0A>Thomas Giddings=0A>n360tg@earthlink.net=0A>727 858 1772= =0A>=C2=A0=0A> =C2=A0=0A>=C2=A0=0A>On Apr 26, 2012, at 1:28 AM, William Jep= son wrote:=0A>=0A>=0A>=0A>Another=0Apossibility is Senessich (never could s= pell that), they have a new ground=0Aadjustable prop. Carbon blades aluminu= m hub, which is supposed to be designed=0Aaround RV speed and HP. They are = supposed to offer a 2 and 3 blade option. Bill=0AJepson=0A>On Apr 25, 2012 = 8:53 PM, "Michael McMahon" wrote:=0A>I=E2=80=99ve been t= hinking along the same lines.=C2=A0 The=0Aone person I=E2=80=99ve heard of = often as a potential builder is Craig Catto, www.cattoprops.com .=0A=C2=A0L= ast time I looked his props were around $3,000, I think, but I have no=0Aid= ea if that is current.=C2=A0 =C2=A0There is also a new possibility, which i= s=0Ato have the prop manufactured on a resin printer and then wrap it in ca= rbon=0Afiber.=C2=A0 I=E2=80=99ve done a little research on that front and s= poke to a=0Amanufacturer last year at the CAF=C3=89 Electric Flight Symposi= um (this weekend in Santa Rosa !) who=0Aconfirmed that it=E2=80=99s possibl= e and is already being done for military=0Adrones.=0A>=C2=A0=0A>Please post= your findings!=0A>=C2=A0=0A>Thanks,=0A>=C2=A0=0A>Mike=0A>=C2=A0=0A>From:Ro= tary motors in aircraft =0A[mailto:flyrotary@lancaironline.net] On Behalf O= f Thomas Giddings=0A>Sent: Wednesday, April 25, 2012=0A6:57 PM=0A>To: Rotar= y motors in aircraft=0A>Subject: [FlyRotary] Fixed Pitch=0Aprops.=0A>=C2=A0= =0A>I am curious what=0Ayou folks might recommend for a fixed pitch prop bu= ilder for my project. I will=0Ahave a lot of excess power and do not think = it would be as difficult to get an=0Aacceptable level of performance with a= lot less money and simplicity. Your=0Athoughts=0A>KIND=0AREGARDS=0A>Thomas= =0AGiddings=0A>n360tg@earthlink.net=0A>727 858 1772=0A>=C2=A0=0A>=C2=A0=0A>= =C2=A0=0A>=C2=A0 --983643977-1492732640-1335538735=:89296 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
I can not = offer much as far as technical performance, but have you considered an Ivo = prop with an in flight electrical adjustable prop? 
<= div>
From:= Thomas Giddings <n360tg@earthlink.net>
To: Rotary motors in aircraft <flyrot= ary@lancaironline.net>
Sent:<= /span> Thursday, April 26, 2012 9:04 AM
Subject: [FlyRotary] Re: Fixed Pitch props.

=0A
I have a Marcotte 2.4/1 PSR= U. It is rated at the right HP for my application. Should be good there. Yo= u are right about Tracy's PSRU. Will not work for this.I have an option for= a constant speed ,but YIKES!!! It is pricey. I will get it if I have too,b= ut am looking at every other option before I go down swinging on this one.<= br>
=0A
KIND REGARDS
Thomas = Giddings
727 858 1772


=0A
=0A
On Apr 26, 2= 012, at 9:38 AM, Bill Bradburry wrote:

=0A=0A=0A =0A =0A =0A =0A = =0A=0A=0A=0A=0A=0A
=0A=0A
Tom,
What engine/PSRU are you planning to put=0Ain your Venture= ?  It seems to me that you are going to have to do some thinking=0Aabo= ut this combination if you plan to use a Mazda engine.
<= div class=3D"yiv1000279971MsoNormal">  
If you use Tracy =E2=80=99s RD1-C, you will b= e limited to=0Aabout 2450 rpm prop speed (7000 engine) on take off and abou= t 2100 rpm prop=0Aspeed (6000 engine) in cruise.  That means a heck of= a lot of pitch to get a=0Acruise speed of 240 knots!  I think that wo= uld work out to around 138 inches of=0Apitch.  On takeoff, you would p= robably think the prop was feathered!
 
Tracy=E2=80=99s = RD1-A or B has a ratio of 2.17 and turns backward to=0Anormal aircraft, but= I don=E2=80=99t know if he has them rated at high HP.
=
 
You may want to try and buy a Mistral PSRU=0A= so you can fit a constant speed prop of some kind.  I don=E2=80=99t kn= ow if that=0Ais even possible??
 
I hope this msg will  generate some=0Acomments from people with m= ore knowledge about this than I and maybe they will=0Ahave some nuggets you= can use.
 
Bill B
 
=0A=0A
=0A=0A
=0A=0A=0A=0A
From: Rotary motors in aircraft =0A[ma= ilto:flyrotary@lancaironline.net] On= =0ABehalf Of Thomas Giddings
=0ASent: Thursday, April 26, 2012=0A7:14 AM
=0ATo: Rotary=0A motors in aircraft
= =0ASubject: [FlyRotary] Re:= Fixed=0APitch props.
=0A=0A
 
Thanks for your info. I did contact Craig Catto and here is= his=0Aresponse:
=0A=0A
=0A=0A
<= span style=3D"font-size:11.0pt;font-family:Calibri;color:#1F497D;">  <= /span>
=0A=0A
=0A=0A
Hello Tom,=
=0A=0A
=0A=0A
That is going to be=0Aquite a challen= ge to fit.   We make them for the 540 Berkut, and that=0Ais about= a 285mph aircraft and have done one for a E-racer turbo 540 at 350HP=0Adoi= ng over 300mph.
=0A=0A
=0A=0A
<= span style=3D"font-size:11.0pt;font-family:Calibri;color:#1F497D;">I do not= think I=0Awant to challenge the auto conversion, just the power curve many= times seems=0Ahard to fit. We know the curve of the Lyc engine very well a= nd so not such a=0Abig deal to fit in these types of applications.  Ea= siest way for you to=0Afit it is probably with a MT.
= =0A=0A
=0A=0A
All the best,
=0A=0A=0A=0A
Craig
=0A=0A
=0A=0A
 
=0A=0A
=0A=0A
I was=0Asurp= rised at his answer as i thought he did Tracy 's prop. The speed of the Ven= ture will=0Anot be that much more then what he described. It may be the hig= h HP I will be=0Ausing.Any more suggestions would be appreciated.
=0A=0A
=0A=0A

=0A
=0A =0A=0A
=0A=0A=0A=0A
=0A=0A
KIND REGARDS
=0A=0A=0A=0A
Thomas Giddings
=0A=0A
=0A=0A<= div>
n360tg@earthlink.net
=0A=0A
=0A=0A
727 858 1772
=0A=0A
=0A=0A
 
=0A= =0A
  =0A=0A
 
=0A=0A
=0A=0A
On Apr 26, 2012, at 1:28 AM, William Jepson wrote: =0A=0A

=0A
=0A
Another=0Apossibility is Senessich (never could spel= l that), they have a new ground=0Aadjustable prop. Carbon blades aluminum h= ub, which is supposed to be designed=0Aaround RV speed and HP. They are sup= posed to offer a 2 and 3 blade option. Bill=0AJepson
= =0A=0A
On Apr 25, 2012 8:53 P= M, "Michael McMahon" <afm528@gmail.com> wrote:
=0A=0A
=0A=0A
I=E2=80=99ve been thinking along the same lines.  The=0Aone person = I=E2=80=99ve heard of often as a potential builder is Craig Catto, www.cat= toprops.com .=0A Last time I looked his props were around $3,000, = I think, but I have no=0Aidea if that is current.   There is also= a new possibility, which is=0Ato have the prop manufactured on a resin pri= nter and then wrap it in carbon=0Afiber.  I=E2=80=99ve done a little r= esearch on that front and spoke to a=0Amanufacturer last year at the CAF=C3= =89 Electric Flight Symposium (this weekend in Santa Rosa !) who=0Aconfirme= d that it=E2=80=99s possible and is already being done for military=0Adrone= s.
 
Please post your findings!
 
Thanks,<= /font>
 
Mike
 
=0A= =0A
=0A=0A
From: Rotar= y motors in aircraft =0A[mailto:flyrotary@lancaironline.net]=0AOn Behalf Of Thomas Giddings
=0ASent: Wednesday, April 25, 2012=0A6:57 PM
=0A= To: Rotary=0A motors in air= craft
=0ASubject: [FlyRo= tary] Fixed Pitch=0Aprops.
=0A=0A
=0A=0A
 
I am curious what=0Ayou folk= s might recommend for a fixed pitch prop builder for my project. I will=0Ah= ave a lot of excess power and do not think it would be as difficult to get = an=0Aacceptable level of performance with a lot less money and simplicity. = Your=0Athoughts
=0A=0A
=0A=0A
KIND=0AREGARDS
=0A=0A
=0A=0A
Thomas=0AGiddings
=0A=0A
= =0A=0A=0A=0A=0A=0A
 
=0A=0A
 
=0A=0A
  =0A=0A
=0A=0A
=0A=0A
=0A=0A
 
=0A=0A
=0A=0A
=0A= =0A
=0A=0A=0A



= --983643977-1492732640-1335538735=:89296--