X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 01 Nov 2012 15:42:02 -0400 Message-ID: X-Original-Return-Path: Received: from [198.64.152.110] (HELO sdc.com) by logan.com (CommuniGate Pro SMTP 6.0c2) with ESMTP id 5852734 for lml@lancaironline.net; Thu, 01 Nov 2012 14:46:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=198.64.152.110; envelope-from=ronald@sdc.com Received: from [192.168.0.2] [68.202.61.147] by sdc.com with ESMTP (SMTPD-12.1.0.270) id bebe000715df7bc4; Thu, 1 Nov 2012 14:44:27 -0400 User-Agent: Microsoft-MacOutlook/14.2.0.120402 X-Original-Date: Thu, 01 Nov 2012 14:46:35 -0400 Subject: Re: [LML] Re: Performance Data Walter Engine From: RONALD STEVENS X-Original-To: Lancair Mailing List X-Original-Message-ID: Thread-Topic: [LML] Re: Performance Data Walter Engine In-Reply-To: Mime-version: 1.0 Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit Well, I think I have one of the most heaviest 4p's out there (BRS (parachute like Cirrus), Amsafe, De-ice, Reversible Prop etc etc), and my realistic numbers are 17500ft, MAP32, 2500RPM, 18.2gph, TIT <1610, CHT<350 cruising 245kts with FULL FUELL and 2 persons (big ones lol), 250kts with fuel at 1/2 tanks (so weight does matter a lot). Ronald (>200 hours IV-p, 340 Velocity, 1100 Cirrus SR22) On 11/1/12 12:20 PM, "Bob Rickard" wrote: >John > >I flew my IV-P with a BPE overhauled engine yesterday at 210, 31"MAP, >2500rpm, 17gph, indicating 255 KTAS. And my airplane is slower than >most I think. So that is realistic. > >Bob R > >On Nov 1, 2012, at 7:58 AM, "John Barrett" wrote: > >> Have I missed something? Have not flown my IVP at FL220 yet, but >>economy >> cruise I've heard about could be about 28" MAP burning 16-18 GPH and >>around >> 260 kts TAS. Are those numbers realistic? >> >> John Barrett >> N31VP - waiting for BPE engine overhaul completion. >> >> -----Original Message----- >> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of >>Dr. >> Weinsweig >> Sent: Wednesday, October 31, 2012 5:50 AM >> To: lml@lancaironline.net >> Subject: [LML] Re: Performance Data Walter Engine >> >> After Ronald asked about pulling back the power on a propjet, I >>experimented >> a bit. >> >> On a recent flight at fl220, I pulled the power back to burn 23-25 gph >>and >> maintained in the 160's kias and 230's ktas in my TKS equipped propjet. >> >> Almost piston efficiency. Watta Plane!!!! >> >> David Weinsweig >> N750DW Propjet >> >> >>>>> weinsweigd@tsnci.com 10/23/2012 4:59:28 PM >>> >> Hi Ronald, >> >> Each propjet has somewhat different performance. Mine with tks deicing >> generally flies between 275-300 ktas in the flight levels. fuel burn is >> 29-39 gph depending on altitude and power settings. >> >> as a baseline I just flew from key west nonstop to huntington, wv at >> fl210 due to strong headwinds and power pulled back some to conserve >>fuel >> and range. I burned 29gph with a true of around 275 ktas in 3;42 nonstop >> burning through my wing fuel (112 gallons) but still having 34 gallons >>in >> the belly tank when i landed. I've done this same flight previously in >>3:10 >> but the winds sucked on Sunday. I have found that the turbine engines >>just >> burn fuel and 25 gph may be a little low to maintain any speed though I >>do >> get that low on descents. They burn close to that at idle. >> >> I'd be happy to discuss the good and bad of turbines and the conversion >> options/shops with you if you'd like as I have had both good and bad >> experiences. >> >> David Weinsweig >> N750DW Propjet >> 304-633-5221 >> weinsweigd@gmail.com >> >> >> >>>>> ronald@sdc.com 10/22/2012 10:13:17 AM >>> >> Hello guys >> >> Today I flew in a Bonanza with an Allison 250 Turbine, and it was >>awesome. I >> was very impressed by performance and the silence and no vibration. >> >> So I got curious now about having a Walter Conversion done, but when I >>was >> looking for performance data (cruise/fuel flow/ economic or power @ >> altitudes) I could not find anything on the web?! >> >> For example I like flying @ 17500ft, just because I can listen to the >>radio >> and do not have to chatter and can avoid bumps when I see one lol >> >> So what does a walter engine burn at this altitude? Could it fly with >>just >> 25gph and what would be its performance? >> Things like that... >> >> So does anyone have this ? And is there anyone I could fly with (I pay >>for >> fuel) who can show me this in his 4p? (I live in Central Florida, but I >>have >> a 4p ;) >> >> Thanks -- Ronald >> >> -- >> For archives and unsub >> http://mail.lancaironline.net:81/lists/lml/List.html >> >> -- >> For archives and unsub >> http://mail.lancaironline.net:81/lists/lml/List.html >> >> -- >> For archives and unsub >>http://mail.lancaironline.net:81/lists/lml/List.html >> >> >> -- >> For archives and unsub >>http://mail.lancaironline.net:81/lists/lml/List.html > >-- >For archives and unsub >http://mail.lancaironline.net:81/lists/lml/List.html >