X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-pb0-f52.google.com ([209.85.160.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5510260 for flyrotary@lancaironline.net; Thu, 26 Apr 2012 12:33:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.160.52; envelope-from=wdleonard@gmail.com Received: by pbcuo15 with SMTP id uo15so9101686pbc.25 for ; Thu, 26 Apr 2012 09:33:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=OmdomNemLcVH7nthiBc1p7AcYhxiIUpwx2qVOtsDGM8=; b=YMX9MBCV8hAdUpMky2NX3L+dxzQnvIgf7FHVGKeP0fICS58GR/GJOMLxjZNCRo8akC jlJQdQmVWOC2hzbf0b155VdPoAw2Y+wRGkeNVIuhbadEvAQrRlqTCsU16NBdYhvTxFhk Z1g7GyMogDWVTWPYF4Ea7+Fd0kO8Ug9CDg9nvjeZfvZxhx5ia/aDNrv8Zi72ngnSAgC/ SFvHR8HEA90ZPjMuGyo43JZ5Ff6a/wWce87Mp2DYa/HGvM3t1aw9ubMBx3Z9NvlhjB4o uK9dRxLK1K2cDLr1FT1EcaoYdEkZ1c8JL++2hIDEo/Rh0pamOdW9NV/jLyf4Jdxy7p2t XGqw== MIME-Version: 1.0 Received: by 10.68.229.73 with SMTP id so9mr16241707pbc.163.1335457983177; Thu, 26 Apr 2012 09:33:03 -0700 (PDT) Received: by 10.68.16.68 with HTTP; Thu, 26 Apr 2012 09:33:03 -0700 (PDT) In-Reply-To: References: Date: Thu, 26 Apr 2012 09:33:03 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Fixed Pitch props. From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=047d7b0721ccb3224904be978aab --047d7b0721ccb3224904be978aab Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On Thu, Apr 26, 2012 at 4:14 AM, Thomas Giddings wrot= e: > Thanks for your info. I did contact Craig Catto and here is his response: > ** ** > Hello Tom,**** > That is going to be quite a challenge to fit. We make them for the 540 > Berkut, and that is about a 285mph aircraft and have done one for a E-rac= er > turbo 540 at 350HP doing over 300mph.**** > I do not think I want to challenge the auto conversion, just the power > curve many times seems hard to fit. We know the curve of the Lyc engine > very well and so not such a big deal to fit in these types of > applications. Easiest way for you to fit it is probably with a MT.**** > All the best,**** > Craig**** > ** ** > **I was surprised at his answer as i thought he did Tracy's prop. The > speed of the Venture will not be that much more then what he described. I= t > may be the high HP I will be using.Any more suggestions would be > appreciated.** > ** > ** > KIND REGARDS > Thomas Giddings > n360tg@earthlink.net > 727 858 1772 > > > > On Apr 26, 2012, at 1:28 AM, William Jepson wrote: > > Another possibility is Senessich (never could spell that), they have a ne= w > ground adjustable prop. Carbon blades aluminum hub, which is supposed to = be > designed around RV speed and HP. They are supposed to offer a 2 and 3 bla= de > option. Bill Jepson > On Apr 25, 2012 8:53 PM, "Michael McMahon" wrote: > >> I=92ve been thinking along the same lines. The one person I=92ve heard = of >> often as a potential builder is Craig Catto, www.cattoprops.com . Last >> time I looked his props were around $3,000, I think, but I have no idea = if >> that is current. There is also a new possibility, which is to have the >> prop manufactured on a resin printer and then wrap it in carbon fiber. >> I=92ve done a little research on that front and spoke to a manufacturer = last >> year at the CAF=C9 Electric Flight Symposium (this weekend in Santa Rosa= !) >> who confirmed that it=92s possible and is already being done for militar= y >> drones.**** >> >> ** ** >> >> Please post your findings!**** >> >> ** ** >> >> Thanks,**** >> >> ** ** >> >> Mike**** >> >> ** ** >> >> *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *= On >> Behalf Of *Thomas Giddings >> *Sent:* Wednesday, April 25, 2012 6:57 PM >> *To:* Rotary motors in aircraft >> *Subject:* [FlyRotary] Fixed Pitch props.**** >> >> ** ** >> >> I am curious what you folks might recommend for a fixed pitch prop >> builder for my project. I will have a lot of excess power and do not thi= nk >> it would be as difficult to get an acceptable level of performance with = a >> lot less money and simplicity. Your thoughts**** >> >> KIND REGARDS**** >> >> Thomas Giddings**** >> >> n360tg@earthlink.net**** >> >> 727 858 1772**** >> >> ** ** >> >> ** ** >> >> ** ** >> > > Thomas, I have a Catto prop and it work great for me. Raced it in Reno last year, and use it for formation flying and cross country and aerobatics. Great all around prop, and it was not even designed for my plane. Craig designed it to go on a velosity and I picked it up second hand. What are the details of your project? Im sure that if you promised to hold Craig harmless on the outcome of the prop he would be glad to make his best guess. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net --047d7b0721ccb3224904be978aab Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable


On Thu, Apr 2= 6, 2012 at 4:14 AM, Thomas Giddings <n360tg@earthlink.net> wrote:
Thanks f= or your info. I did contact Craig Catto and here is his response:
=A0
Hello Tom,
That is going to be quite a challenge to fit.=A0=A0 We make them fo= r the 540 Berkut, and that is about a 285mph aircraft and have done one for= a E-racer turbo 540 at 350HP doing over 300mph.
I do not think I want to challenge the auto conversion, just the power c= urve many times seems hard to fit. We know the curve of the Lyc engine very= well and so not such a big deal to fit in these types of applications.=A0 = Easiest way for you to fit it is probably with a MT.
All the best,
Craig
=A0
I was surprised at his answer as i thought he did Tracy's pro= p. The speed of the Venture will not be that much more then what he describ= ed. It may be the high HP I will be using.Any more suggestions would be app= reciated.

KIND REGARDS
Thomas Giddings



On Apr 26, 2012, at 1:28 AM, Wil= liam Jepson wrote:

Another possibilit= y is Senessich (never could spell that), they have a new ground adjustable = prop. Carbon blades aluminum hub, which is supposed to be designed around R= V speed and HP. They are supposed to offer a 2 and 3 blade option. Bill Jep= son

On Apr 25, 2012 8:53 PM, "Michael McMahon&q= uot; <afm528@gmail= .com> wrote:

I=92ve been thinking along the same lines.= =A0 The one person I=92ve heard of often as a potential builder is Craig Ca= tto, www.cattoprop= s.com . =A0Last time I looked his props were around $3,000, I think, bu= t I have no idea if that is current.=A0 =A0There is also a new possibility,= which is to have the prop manufactured on a resin printer and then wrap it= in carbon fiber.=A0 I=92ve done a little research on that front and spoke = to a manufacturer last year at the CAF=C9 Electric Flight Symposium (this w= eekend in Santa Rosa!) who confirmed that it=92s possible and is already be= ing done for military drones.

=A0<= /p>

Please post your findi= ngs!

=A0<= /p>

Thanks,<= /span>

=A0<= /p>

Mike

=A0

<= div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0= in 0in">

From: Rotary m= otors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Thomas= Giddings
Sent: Wednesday, April 25, 2012 6:57 PM
To: Rotary motors = in aircraft
Subject: [FlyRotary] Fixed Pitch props.=

=A0

I am curious what you folks might recommend for a fixed pitch prop builder = for my project. I will have a lot of excess power and do not think it would= be as difficult to get an acceptable level of performance with a lot less = money and simplicity. Your thoughts

KIND REGARDS<= /span>

Thomas Giddings<= u>

=A0

=A0

=A0



Thoma= s,
I have a Catto prop and it work great for me.=A0 Raced it in Reno last=20 year, and use it for formation flying and cross country and aerobatics.=A0 Great all around prop, and it was not even designed for my plane.=A0=20 Craig designed it to go on a velosity and I picked it up second hand.=A0=20 What are the details of your project?

Im sure that if you promised to hold Craig harmless on the outcome of the p= rop he would be glad to make his best guess.



--
David Leonard

Turbo Rotary RV-6 N4VYhttp://N4VY.RotaryRoster.net<= br>http://RotaryRoster.net
--047d7b0721ccb3224904be978aab--