X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta06-srv.windstream.net ([166.102.165.167] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTP id 2829777 for flyrotary@lancaironline.net; Wed, 02 Apr 2008 18:09:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.167; envelope-from=jskmberki@alltel.net Received: from ispmxaamta04-gx.windstream.net ([71.29.109.139]) by ispmxmta06-srv.windstream.net with ESMTP id <20080402220901.YBCN25765.ispmxmta06-srv.windstream.net@ispmxaamta04-gx.windstream.net> for ; Wed, 2 Apr 2008 17:09:01 -0500 Received: from joehomepc ([71.29.109.139]) by ispmxaamta04-gx.windstream.net with SMTP id <20080402220901.JJQI5310.ispmxaamta04-gx.windstream.net@joehomepc> for ; Wed, 2 Apr 2008 17:09:01 -0500 Message-ID: <007901c89517$9f20c310$01fea8c0@joehomepc> From: "Joe Berki" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Prop selection Date: Wed, 2 Apr 2008 18:15:55 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0063_01C894ED.98108A80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1914 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1914 This is a multi-part message in MIME format. ------=_NextPart_000_0063_01C894ED.98108A80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Perry, I was planning on using a RD-1C with my 89 P Port. Any suggestion on a = prop? Does increasing the number of blades achieve a similar affect as = using a 74" prop? I need to go to prop 101. JoeBerki Limo EZ ----- Original Message -----=20 From: Perry Mick=20 To: Rotary motors in aircraft=20 Sent: Tuesday, April 01, 2008 8:37 PM Subject: [FlyRotary] Re: Prop selection Yes, it's on the back cover of the plans - 62" max. When I built my = prop, I looked through the Central States list to see what everyone was = using. There are a few larger diameter, but not by much. I made mine 62" = diameter because I had lowered the thrustline slightly with the ducted = fan, and I'm still using the same engine mount and thrustline now, so = I'm breaking the Rutan rule a bit. With RD1B I turn the engine up to = 6400 and prop to 2950, 68" pitch. With a RD1C you will only get 2245 = prop RPM at 6400 engine RPM. My 86 NA engine redlines at 7000. If you = have the later 13B that redlines at 8000 (I think) and run it to 7500 = RPM that would be 2630 prop RPM. So you will need a higher pitch with = the lower prop RPM to get your cruise speed. I didn't know you were flying EZ now Neil. How do you like it? Perry http://www.mickaircraft.com/duckt.htm ___ Brad, On a standard long-ez, you shouldn't go any longer than = 62" diameter otherwise you risk a prop strike on rotation or landing = (i.e., nose high attitude). Some push the envelope and use 64". Neil Kruiswyk (Now a Long-EZ flyer.) -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Brad Solomon Sent: Tuesday, April 01, 2008 3:30 PM To: Rotary motors in aircraft Subject: [FlyRotary] Prop selection I'm Brad, a student at SUU in Southern Utah. we are constructing a = Long EZ air craft. We have the 13b with turbo and Crooks redrive RD-1C. = We want to put a two blade prop on and we are trying to find out what = length can be used. What is our limitation and what has worked best for = people. If any one knows what has been used and has worked please help = us out. Does 68" sound reasonable for a two blade prop? Any info would = be great. Thanks. Brad=20 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG.=20 Version: 7.5.519 / Virus Database: 269.22.5/1356 - Release Date: = 4/2/2008 4:14 PM ------=_NextPart_000_0063_01C894ED.98108A80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Perry,
I was planning on using a RD-1C with my = 89 P=20 Port.  Any suggestion on a prop?  Does increasing the number = of blades=20 achieve a similar affect as using a 74" prop?  I need to go to prop = 101.
 
JoeBerki
Limo EZ
----- Original Message -----
From:=20 Perry = Mick=20
Sent: Tuesday, April 01, 2008 = 8:37=20 PM
Subject: [FlyRotary] Re: Prop=20 selection

Yes, it's on the=20 back cover of the plans - 62" max. When I built my prop, I looked = through the=20 Central States list to see what everyone was using. There are a few = larger=20 diameter, but not by much. I made mine 62" diameter because I had = lowered the=20 thrustline slightly with the ducted fan, and I'm still using the same = engine=20 mount and thrustline now, so I'm breaking the Rutan rule a bit. With = RD1B I=20 turn the engine up to 6400 and prop to 2950, 68" pitch. With a RD1C = you will=20 only get 2245 prop RPM at 6400 engine RPM. My 86 NA engine redlines at = 7000.=20 If you have the later 13B that redlines at 8000 (I think) and run it = to 7500=20 RPM that would be 2630 prop RPM. So you will need a higher = pitch with the=20 lower prop RPM to get your cruise speed.
 
I didn't know=20 you were flying EZ now Neil. How do you like it?
 
Perry
http://www.mickaircraft.co= m/duckt.htm
 
 
___
 
 
Brad,
         &nbs= p; =20 On a standard long-ez, you shouldn=92t go any longer than 62=94 = diameter otherwise=20 you risk a prop strike on rotation or landing (i.e., nose high=20 attitude).  Some push the envelope and use 64=94.
Neil Kruiswyk
(Now a Long-EZ=20 flyer=85)
From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of = Brad=20 Solomon
Sent: Tuesday, April 01, 2008 3:30=20 PM
To: Rotary = motors in=20 aircraft
Subject: [FlyRotary] = Prop=20 selection
I'm Brad, a student = at SUU in=20 Southern Utah.  we are = constructing a=20 Long EZ air craft.  We have the 13b with turbo and Crooks redrive = RD-1C.  We want to put a two blade prop on and we are trying to = find out=20 what length can be used. What is our limitation and what has = worked best=20 for people.  If any one knows what has been used and has worked = please=20 help us out.  Does 68" sound reasonable for a two blade = prop? Any=20 info would be great. Thanks.  Brad 

No virus found in this incoming message.
Checked by AVG.=20
Version: 7.5.519 / Virus Database: 269.22.5/1356 - Release Date: = 4/2/2008=20 4:14 PM
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