X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-galgo.atl.sa.earthlink.net ([209.86.89.61] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5507627 for flyrotary@lancaironline.net; Thu, 26 Apr 2012 07:15:03 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.61; envelope-from=n360tg@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=gr+fhMJrF4AqPULqjD7QHhIh7wHUSE+rctaFCCU7y8fV9T13fg1Y5c5hADeLFwUr; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [184.0.224.156] (helo=[192.168.1.69]) by elasmtp-galgo.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1SNMeQ-0000Lr-3c for flyrotary@lancaironline.net; Thu, 26 Apr 2012 07:14:18 -0400 From: Thomas Giddings Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-24-649374610 Subject: Re: [FlyRotary] Re: Fixed Pitch props. Date: Thu, 26 Apr 2012 07:14:20 -0400 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: <2D2428E5-FCB8-4E16-9C05-5048E4D1FB0B@earthlink.net> X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 77b0437ff618fec294f5150ab1c16ac07c540ca440b21de7bd305b88233e2bf7c774839b36fcfeba350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 184.0.224.156 --Apple-Mail-24-649374610 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Thanks for your info. I did contact Craig Catto and here is his = response: =20 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-racer 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 =20 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. = It 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 = new 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 blade option. Bill Jepson >=20 > 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 military drones. >=20 > =20 >=20 > Please post your findings! >=20 > =20 >=20 > Thanks, >=20 > =20 >=20 > Mike >=20 > =20 >=20 > 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. >=20 > =20 >=20 > 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 >=20 > KIND REGARDS >=20 > Thomas Giddings >=20 > n360tg@earthlink.net >=20 > 727 858 1772 >=20 > =20 >=20 > =20 >=20 > =20 >=20 --Apple-Mail-24-649374610 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 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-racer 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,
KIND = REGARDS
Thomas Giddings
72= 7 858 1772



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

Another possibility is Senessich (never could spell = that), they have a new 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 blade option. Bill Jepson

On Apr 25, 2012 8:53 PM, "Michael McMahon" = <afm528@gmail.com> = 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 military 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 = think 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

 

 

 


= --Apple-Mail-24-649374610--