From: "Doug Lomheim rv9flyer13b@gmail.com" Received: from pmg.Logan.com ([207.170.160.161] verified) by logan.com (CommuniGate Pro SMTP 6.5.3) with ESMTPS id 4416910 for flyrotary@lancaironline.net; Wed, 19 Nov 2025 09:36:15 -0500 Received: from pmg.Logan.com (localhost [127.0.0.1]) by pmg.Logan.com (Proxmox) with ESMTP id 5E6DC2BB4B for ; Wed, 19 Nov 2025 09:36:15 -0500 (EST) Received-SPF: pass (gmail.com ... _spf.google.com: Sender is authorized to use 'rv9flyer13b@gmail.com' in 'mfrom' identity (mechanism 'include:_netblocks.google.com' matched)) receiver=pmg.Logan.com; identity=mailfrom; envelope-from="rv9flyer13b@gmail.com"; helo=mail-ot1-f52.google.com; client-ip=209.85.210.52 Received: from mail-ot1-f52.google.com (mail-ot1-f52.google.com [209.85.210.52]) by pmg.Logan.com (Proxmox) with ESMTPS for ; Wed, 19 Nov 2025 09:36:09 -0500 (EST) Received: by mail-ot1-f52.google.com with SMTP id 46e09a7af769-7c6da42fbd4so2513853a34.1 for ; Wed, 19 Nov 2025 06:36:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763562962; x=1764167762; darn=lancaironline.net; h=to:date:message-id:subject:mime-version:from:from:to:cc:subject :date:message-id:reply-to; bh=WoCe7gFoQDTR1Luu5ku2ucL9TaYSTN8CvaEAmRqh2YA=; b=EpJA7DSh14AnF4Ald4U63TJB8yxjxNOBCGacqTtU3CKNPcUkzuTgKzDUJkSwtncQyt 6kcRQUGg1Ff7tV/d83jKc6bM+WOCllKtKuyOjy+vPmyqo6g6/vrIaVWE6gs/rbvEpCMP PDOnphXJPy4aeu/jkZf/kWEOphWifMmMqJ3y+Pugw7svCGrlO2u034/T0QuLi7piJXya Kb2VUegiN5Id+We7IeVNSYA7wskh6EdoItiRbZXbCbr8N8oHwZIRjEaFf7xwBIyEgp4g iaDOrdIfOKgL1idIBu5VkDRO27QQKkKHRUHM7P6IPcITfNjpg/8t1pawDqUg5lvbAUK7 GpUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763562962; x=1764167762; h=to:date:message-id:subject:mime-version:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WoCe7gFoQDTR1Luu5ku2ucL9TaYSTN8CvaEAmRqh2YA=; b=V4oNwv2vv1CRU9xtCpSwh231m2LFlDciMu7+QgYeV2cC/t1IxaDEDPkfGz06/n/zuS UIpGfcu/co8XW7Hj62fsJ8dddFns3/2C1riml7eKqAFsuCjkwqmFInsmAJKxlpOdnWag w1nk6VXlmGkZ417az4OgEI9ZY53erqbov3CJR5/aB9xza66Pj5qYc3xh5zYi8fVTK2L8 EM+RDkpxbfN7gKszkNmQxLz2f/svwVtoI3Q1CiwhucDrOFPu5PZo+eUtufH9+6oNBMTG Y6nrFuSauJZj2FjFc7Vzn9murn+S+hgZsWDHqk6aWfbhIOx6AKypBMYXURhunR+ERTba 29xA== X-Gm-Message-State: AOJu0YxkiBykHxwIFsix57muvwKfogvelRJWoDuxC6qtkeUrP2NZ7nsh +p8oU5KMoZAqMfr1saExrXag0735ZZiBKyOSMSwQRFtULkDHhwUH8SrFJVk07A== X-Gm-Gg: ASbGncvU6p5yU1yRc6CwdaXAhFVbICr6TCJIcV5m13u/ccHeWTaT1AhRwPFK7YeNQMK BplIKRLxq13iFMH25OciNuHsdgmYjPOa+hE8gk5WNhwRD2QM+oTHfL2JtPllaaWrJAzOEld8JfS wnWS+8Z8ApEUfXBoMxILlTwnHdNEJT/0yQ1P8FxPzGZpscfEUuEqQPot+s0RqKTDuQvgqHG73xk sDCyQv2ZpkF/Fu4fntAeRpim/K4zfZstb/KSStIbGT7EiHm8wC268ojbkhq5ntrdbz7onVs8T9K sPUvHAdHDSEsJaxW7jYKtMu5WeIftTJf9y5323tcircZ7M1O8QLI9a6ZRVKLcGqV9nA9ubn7AkL EyGsxaTY3rUjde5BX9NKrAT9FBxKD+aP7Onv+lwuNjcjn93HcGlqNYL4ZUvbtK1MmwXOIA3a26X 3zfDex+r9neBxkTXs2cmxGGbgW X-Google-Smtp-Source: AGHT+IHXyFkoMWtPXQUpWlKAX7ZRXhrRXjSwjsjWuAVvnpQ2scyFUv3wCJ1pv4gtCw1ROIjKpXHlVw== X-Received: by 2002:a05:6808:538c:b0:44d:bdd1:a5ee with SMTP id 5614622812f47-4509759c9f2mr8306880b6e.62.1763562961963; Wed, 19 Nov 2025 06:36:01 -0800 (PST) Received: from smtpclient.apple ([2.56.190.42]) by smtp.gmail.com with ESMTPSA id 5614622812f47-450a5f5e1a9sm4032383b6e.12.2025.11.19.06.36.01 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 19 Nov 2025 06:36:01 -0800 (PST) X-Google-Original-From: Doug Lomheim Content-Type: multipart/alternative; boundary="Apple-Mail=_DE382656-E8CD-4656-805C-D7A3E67EFA86" Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.15\)) Subject: Typical XC fuel burn gph, specific fuel consumption??? Message-Id: Date: Wed, 19 Nov 2025 08:35:59 -0600 To: Rotary Motors in Aircraft X-Mailer: Apple Mail (2.3654.120.0.1.15) X-SPAM-LEVEL: Spam detection results: 0 AWL -0.075 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain DMARC_PASS -0.1 DMARC pass policy FREEMAIL_FROM 0.001 Sender email is commonly abused enduser mail provider FREEMAIL_REPLY 1 From and body contain different freemails HTML_FONT_SIZE_HUGE 0.001 HTML font size is huge HTML_MESSAGE 0.001 HTML included in message KAM_MXURI 1.5 URI begins with a mail exchange prefix, i.e. mx.[...] RCVD_IN_MSPIKE_H3 0.001 Good reputation (+3) RCVD_IN_MSPIKE_WL 0.001 Mailspike good senders SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record WEIRD_PORT 0.001 Uses non-standard port number for HTTP --Apple-Mail=_DE382656-E8CD-4656-805C-D7A3E67EFA86 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Marc: Sam Hodges is also flying a Renesis RV-7A, and he told me he = mission plans to cruise at 7500-9500 feet and sets 5600-5700 rpm. That = yields 8 - 9 GPH, at about 160 TAS. =20 My experience after 11 months of flying and have pushed about about 500 = gallons through the engine has avi=E2=80=99d 8.2-8.5 gph. I usually = cruise at 5500-6500 ft. and 5200-5300 rpm which yields a TAS of 148-150 = mph, =20 Having been on this list since the late 90=E2=80=99s or so, and = discussed performance over the years with so many that have flown = rotaries; the myth of "=E2=80=9Cexcessive" fuel burn=E2=80=9D" has been = consistently refuted. I recently flew to an airport restaurant about 65 = miles away with two neighbors in RV6 (160 hp CS prop) and RV6A 180 hp CS = prop). we all cruised together and upon return check fuel and we all = burned 8.4-5 gph, so sometimes our installations can match Lycomings as = well. Not sure how aggressively or not my buddies leaned, etc.; but = with aggressive leaning I think the Lycoming will beat us by .2-.3 per = hr.; but I=E2=80=99m running on $2.159 Sam=E2=80=99s 87 octane fuel, = while they=E2=80=99re paying about $4.50 on avg. here in Oklahoma! =20= Doug =20 Marc Wiese cardmarc@charter.net Subject: Typical XC fuel burn gph, specific fuel consumption??? Date: Tue, 18 Nov 2025 17:59:48 -0600 To: 'Rotary motors in aircraft' So, for those of us who know better, what is to be expected lop or ? on = a XC at certain DALT? This Paul guy disputes the ability of the rotary = to compete with Lyc fuel burns? Marc ------------------------------------------------ Hi Marc! Glad to hear Dennis is flying happily... but I'd be interested in his = fuel specifics. The rotary engines are fuel hogs... with about double = the fuel consumption of a Lycoming and LOP... At least, that was Lionel = Madore's experience on his twin-rotary (!) 180 homebuilt clone. The = CAF=C3=89 literature seems to support that as well... is Dennis = experience any different? Paul Subject: FW: [FlyRotary] 1,000 hrs on the Hobbs! Paul, I think you may have a few misconception on a 'good' rotary engine = installation. Lots of 'bad' ones out there, but it works. Marc --Apple-Mail=_DE382656-E8CD-4656-805C-D7A3E67EFA86 Content-Type: multipart/related; type="text/html"; boundary="Apple-Mail=_6197C066-AFF0-465E-BAD1-4B83F0867ABE" --Apple-Mail=_6197C066-AFF0-465E-BAD1-4B83F0867ABE Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Marc:  Sam Hodges is also flying a Renesis = RV-7A, and he told me he mission plans to cruise at 7500-9500 feet and = sets 5600-5700 rpm.  That yields 8 - 9 GPH, at about 160 TAS. =  

My experience after 11 months of flying and have pushed = about about 500 gallons through the engine has avi=E2=80=99d = 8.2-8.5 gph.  I usually cruise at 5500-6500 ft. and 5200-5300 rpm = which yields a TAS of 148-150 mph,  

Having been on this list since = the late 90=E2=80=99s or so, and discussed performance over the = years with so many that have flown rotaries; the myth of "=E2=80=9Cexcessi= ve" fuel burn=E2=80=9D" has been consistently refuted.  I = recently flew to an airport restaurant about 65 miles away with two = neighbors in RV6 (160 hp CS prop) and RV6A 180 hp CS prop).  we all = cruised together and upon return check fuel and we all burned = 8.4-5 gph, so sometimes our installations can match Lycomings as well. =  Not sure how aggressively or not my buddies = leaned, etc.; but with aggressive leaning I think the Lycoming = will beat us by .2-.3 per hr.; but I=E2=80=99m running on $2.159 Sam=E2=80= =99s 87 octane fuel, while they=E2=80=99re paying about $4.50 on avg. = here in Oklahoma!     

Doug  




Subject:
Marc Wiese cardmarc@charter.net = <flyrotary@lancaironline.net>
Typical XC fuel burn gph, specific fuel = consumption???
Date:Tue, 18 Nov = 2025 17:59:48 -0600
To:'Rotary motors = in aircraft' <flyrotary@lancaironline.net>
3D"Message

3D"Undecoded
So, for those of us who = know better, what is to be expected lop or ? on a XC at certain DALT? = This Paul guy disputes the ability of the rotary to compete with Lyc = fuel burns?
Marc
------------------------------------------------
Hi Marc!

Glad to hear Dennis is = flying happily... but I'd be interested in his fuel specifics. The = rotary engines are fuel hogs... with about double the fuel consumption = of a Lycoming and LOP... At least, that was Lionel Madore's experience = on his twin-rotary (!) 180 homebuilt clone. The CAF=C3=89 literature = seems to support that as well... is Dennis experience any different?

Paul

Subject: FW: = [FlyRotary] 1,000 hrs on the Hobbs!

Paul,
I think you may have a few misconception on a 'good' rotary = engine installation. Lots of 'bad' ones out there, but it works.
Marc

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