X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=G+5i7Os5 c=1 sm=1 tr=0 a=H0Oh9EQUVNxurf82CAIeDQ==:117 a=8v5srLj62lVfeBRm4jmETA==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=IkcTkHD0fZMA:10 a=J70Eh1EUuV4A:10 a=YT3Yr15HAAAA:8 a=pGLkceISAAAA:8 a=_6GpL_ENAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=uiNV4AnfoSjD5tyJF40A:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=wTiroRwonzHjqvaCcHYi:22 a=grOzbf7U_OpcSX4AJOnl:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=pHzHmUro8NiASowvMSCR:22 a=Ew2E2A-JSTLzCXPT_086:22 From: "Kent Bedford kbedford@alphalink.com.au" Received: from nsstlmta19p.bpe.bigpond.com ([203.38.21.19] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 12921502 for flyrotary@lancaironline.net; Wed, 04 Sep 2019 03:00:15 -0400 Received-SPF: softfail receiver=logan.com; client-ip=203.38.21.19; envelope-from=kbedford@alphalink.com.au Received: from smtp.telstra.com ([10.10.24.4]) by nsstlfep19p-svc.bpe.nexus.telstra.com.au with ESMTP id <20190904065957.HRST20367.nsstlfep19p-svc.bpe.nexus.telstra.com.au@smtp.telstra.com> for ; Wed, 4 Sep 2019 16:59:57 +1000 X-RG-Spam: Unknown X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgeduvddrudejgedguddtlecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfupfevtfgpvffgnffuvffttedpqfgfvfenuceurghilhhouhhtmecugedttdenucenucfjughrpefuvfhfhffkffgfgggjtgfgsehtkeertddtfeejnecuhfhrohhmpefmvghnthcuuegvughfohhrugcuoehksggvughfohhrugesrghlphhhrghlihhnkhdrtghomhdrrghuqeenucffohhmrghinheprghvrghsthdrtghomhdplhgrnhgtrghirhhonhhlihhnvgdrnhgvthdpfhhlhihrohhtrghrhidrtghomhenucfkphepuddrudefiedrvdefledrudehheenucfrrghrrghmpehhvghloheplgduledvrdduieekrdegvddrudehngdpihhnvghtpedurddufeeirddvfeelrdduheehpdhmrghilhhfrhhomhepoehksggvughfohhrugesrghlphhhrghlihhnkhdrtghomhdrrghuqecuuefqffgjpeekuefkvffokffogfdprhgtphhtthhopeeofhhlhihrohhtrghrhieslhgrnhgtrghirhhonhhlihhnvgdrnhgvtheqnecuvehluhhsthgvrhfuihiivgeptd X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean X-RG-VS-CLASS: clean X-Authentication-Info: Submitted using ID kent.bedford@bigpond.com Received: from [192.168.42.15] (1.136.239.155) by smtp.telstra.com (5.8.335) (authenticated as kent.bedford@bigpond.com) id 5D2D117513BD5229 for flyrotary@lancaironline.net; Wed, 4 Sep 2019 16:59:57 +1000 Subject: Re: [FlyRotary] Re: The ultimate question... To: Rotary motors in aircraft References: Message-ID: Date: Wed, 4 Sep 2019 17:00:00 +1000 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-AU Was just talking to the engine builder and the answer to one question also answered another - The reason that the engine will have two turbos is that they are set up sequentially - the first one operates as a turbo normaliser to 500 rpm above cruise rpm.  Once the throttle is opened past that point for takeoff/climbout the second turbo kicks in to more power. That also explains the fuel efficiency at cruise - only a small turbo is operating to provide turbo normalisation.  Hope this makes sense! On 4/09/2019 11:21 am, Kent Bedford kbedford@alphalink.com.au wrote: > Kind of strange how it worked out, but when we made a small change to > the design that gave a tangible benefit we suddenly found ourselves > with room for an extra 40 gallons on top of what we already had - 90 > gallons should be enough for range to be governed by bladder size > instead of fuel tank size. > > On 4/09/2019 6:08 am, Charlie England ceengland7@gmail.com wrote: >> On 9/3/2019 2:31 AM, Kent Bedford kbedford@alphalink.com.au wrote: >>> ...if someone has an about 450hp four rotor + turbo engine with >>> effective cooling, and resolves the torsional vibration and >>> resonance issues (which will partly be resolved by having four >>> rotors anyway), are there any other foreseeable likely or possible >>> issues that may need to be overcome to successfully operate it with >>> a good 500hp-rated PSRU like a Ballistic or similar? >>> >> Figuring out where to put the fuel, unless you're talking about a >> time-to-climb record attempt or Reno racer. Any usable a/c at that >> power level may require your own refinery. >> Charlie >> >> >> --- >> This email has been checked for viruses by Avast antivirus software. >> https://www.avast.com/antivirus >> >> >> -- >> Homepage:  http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> > > > -- > Homepage:  http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > >