X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm12.bullet.mail.sp2.yahoo.com ([98.139.91.82] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with SMTP id 5518392 for flyrotary@lancaironline.net; Tue, 01 May 2012 20:18:21 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.91.82; envelope-from=ceengland@bellsouth.net Received: from [98.139.91.66] by nm12.bullet.mail.sp2.yahoo.com with NNFMP; 02 May 2012 00:17:46 -0000 Received: from [98.139.44.87] by tm6.bullet.mail.sp2.yahoo.com with NNFMP; 02 May 2012 00:17:46 -0000 Received: from [127.0.0.1] by omp1024.access.mail.sp2.yahoo.com with NNFMP; 02 May 2012 00:17:46 -0000 X-Yahoo-Newman-Id: 488021.99633.bm@omp1024.access.mail.sp2.yahoo.com Received: (qmail 93587 invoked from network); 2 May 2012 00:17:46 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bellsouth.net; s=s1024; t=1335917866; bh=SVcR2up54erOQdo99Sf5i6zk+nTZXaA20CaSfEV8bw8=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=xMr+n/8+t4+8zurhxBolGO1clNMpK0KXr9lpMu/B0YcmVOXzMLO5Anj3X2HaPVXmaGKoMYDOm4VufB2YzLEghxy0VF22yaWqlXioeoFx2ZW4gcrS2ybT1Q9qjzhiJXMXZBjtOngNbr1VsKOw/Xw3Y4S7+sRRaZAobbK3qppBRf0= X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: cd8L.sQVM1nqk805MaDGpujd_AK6K8_Nl_9zyhxI6HKrgFd vHijlrGRabJ3eGdzdmIaKBMC2SrOFCuMW2tynVz03vhR.b0IIanmdCpHL0JJ StB.suIJfW0daQsgk9UoHG.t2PIcDqUpod8AbfQxE7BClDrFOdgYvyh9J5W6 RElFiWe6IuUQ4Fco4c2o4y0vxo6Tm7mbACoMRAkrygYim6wMbmqE.elPvcEc Zk.l4orR0cvrSkjFuLAOYLG8yFvGJK1qpP4heXmZH9yM2A.KvEVjqnGUJR8a 6DVEfYYMNEJBxiAfZ6z35_tJeezPDwDhjhQ1pTtrCr30fHW3iK4Jf6p5aVAr 5ozIXKggdfwlRpQ9pqvYZjKAPOxn3oKZOyE7vRteh8g5RA_hlQ3MG5O_fHdQ Lp8CoKG_pwnYXdOPm1UHaMcUk8IZe9duSDY2jXk7lVe39swwsvwmH8TR1_Pn 8ERjAqy5.67HvTkMmT9IlWDRMktVVMGvEI_RGvKarbpEiq568QaI9_aBRqlW eNBdzPH_0BVGuz0wJeVZWmIQ4TZ.oDSu_t2Gq00MTkzYAS1bxDbaBX1ri0r1 3c0AkAfv_Rd4YrfIWrRWg.3KSHGp6_f9TF_UG7oDo7w1ScH57T53OyX20wAM aFRjf17PGFU7kLU5wbrqmepENBnaj0k5766YqESdfIbWBfcdeE5U6ITJ9iby ijNhnsCnx X-Yahoo-SMTP: uXJ_6LOswBCr8InijhYErvjWlJuRkoKPGNeiuu7PA.5wcGoy Received: from [192.168.10.30] (ceengland@74.240.6.113 with plain) by smtp104.sbc.mail.mud.yahoo.com with SMTP; 01 May 2012 17:17:45 -0700 PDT Message-ID: <4FA07D29.10705@bellsouth.net> Date: Tue, 01 May 2012 19:17:45 -0500 From: Charlie England User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Propellers Explained References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Well, I just re-read my previous post, & I'm wondering if bad sentence structure is contagious. :-( Sometimes editing an email does more damage than good. Anyway, it's hard to argue with Lipps' success at Reno. However, the climb numbers that he published on the VAF forum (for an RV) didn't look that great, so I suspect that he gives up a lot of climb to get that superb high speed performance. With enough excess HP (common on most homebuilts these days), I'd consider giving up some climb efficiency in exchange for cruise performance. But I hate to waste even $20 on a book that's unable to present its info in a useful format. Charlie On 05/01/2012 06:53 PM, Ernest Christley wrote: > I had the same opinion, Charlie. It is also hard to take seriously the claim that they are the only ones to truly understand propellers. > > Charlie England wrote: > >> On 04/28/2012 11:05 AM, Kelly Troyer wrote: >>> A highly recommended publication according to Paul Lipps of "Ellipse >>> Propeller" fame..........Thought some >>> of the group may find it useful or at least educational............ >>> http://www.propellersexplained.com/ >>> >>> -- >>> Kelly Troyer >>> Dyke Delta_"Eventually" >>> 13B_RD1C_EC2_EM2 >> Hi Kelly, thanks for the link. >> >> I'm really interested in Lipps' prop designs; they obviously work at >> high speeds. Has anyone read this book, or at least browsed through it? >> I'd buy it in a heartbeat, but the promotional web site has such bad >> sentence structure (structure in general, really). If the book is >> written the same way, I'm not sure I could extract useful info. >> >> Charlie > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html