X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2784345 for flyrotary@lancaironline.net; Sun, 09 Mar 2008 15:07:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([75.191.186.236]) by cdptpa-omta05.mail.rr.com with SMTP id <20080309190701.IRIL25331.cdptpa-omta05.mail.rr.com@edward2> for ; Sun, 9 Mar 2008 19:07:01 +0000 Message-ID: <001701c88218$cb1b0230$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: direct drive- was Re: Anyone have an RD-1C for sale? Date: Sun, 9 Mar 2008 15:07:17 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C881F7.43C6B3E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C881F7.43C6B3E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageBest power, sea level standard day, 2 rotor and assuming the prop = load permits engine to reach this rpm. 3000 - 86HP 3500 - 100HP 4000 - 115HP Would seem reasonable for an RV-3 and loosing 41 lbs with no PSRU should = made this even better. Go for it Rusty!!!! If not thing else you could = prove Tracy wrong {:>) Don't bring any of that white stuff back to this neck of the woods with = you - ya hare? Ed ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Sunday, March 09, 2008 4:13 AM Subject: [FlyRotary] Re: direct drive- was Re: Anyone have an RD-1C = for sale? Sure, that can work but why not something completely different? I = want to see someone do a direct drive 2 rotor (maybe even turboed) in = the right application and the RV-3 comes close. That would be Kool! =20 Hi Tracy, Thanks for the comments, but you're not suckering me into this direct = drive idea :-) =20 You've mentioned this before, but I just can't see the benefit. How = much HP would a 2 rotor make at 3000, 3500, and 4000 rpm? Anyone got a = power chart handy? Limiting the rpm of a rotary to direct drive speeds = just seems unnatural to me. =20 Another point about the single rotor is that I'm trying to make the = RV-3 Sport Pilot compliant, and that will be easier to justify with a = smaller engine. Fortunately, I don't foresee any medical issues, but = I'm also fooling myself into believing this will be my last airplane. = Please keep the laughter to a minimum :-) =20 Rusty (heading south in less than 5 days) PS- Just shoveled about 1000 lbs of snow from around the van. I can = easily see how people have heart attacks doing this. And yes, still = with Philips, but we just changed our name to Philips Healthcare. ------=_NextPart_000_0014_01C881F7.43C6B3E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Best power, sea level standard day, 2 rotor and = assuming=20 the prop load permits engine to reach this rpm.
 
3000 - 86HP
3500 - 100HP
4000 - 115HP
 
Would seem reasonable for an RV-3 and loosing 41 = lbs with=20 no PSRU should made this even better.  Go for it Rusty!!!!  If = not=20 thing else you could prove Tracy wrong {:>)
 
Don't bring any of that white stuff back to this = neck of=20 the woods with you - ya hare?
 
Ed
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Sunday, March 09, 2008 = 4:13=20 AM
Subject: [FlyRotary] Re: direct = drive-=20 was Re: Anyone have an RD-1C for sale?

Sure, that=20 can work but why not something completely = different?   I=20 want to see someone do a direct drive 2 rotor (maybe even turboed) in = the=20 right application and the RV-3 comes close.   That would be=20 Kool!   
 
Hi=20 Tracy,
 
Thanks = for the=20 comments, but you're not suckering me into this direct drive idea=20 :-)  
 
You've = mentioned this=20 before, but I just can't see the benefit.  How much HP would a 2 = rotor=20 make at 3000, 3500, and 4000 rpm?  Anyone got a power chart = handy? =20  Limiting the rpm of a rotary to direct drive speeds just seems = unnatural=20 to me. 
 
Another = point about=20 the single rotor is that I'm trying to make the RV-3 Sport Pilot = compliant,=20 and that will be easier to justify with a smaller=20 engine.  Fortunately, I don't foresee any medical issues, = but I'm=20 also fooling myself into believing this will be my last = airplane.  Please=20 keep the laughter to a minimum :-)  
 
Rusty = (heading south=20 in less than 5 days)
 
PS- Just shoveled=20 about 1000 lbs of snow from around the van.  I can easily see how = people=20 have heart attacks doing this.  And yes, still with Philips, but = we just=20 changed our name to Philips Healthcare. =20 =    
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