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Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 525989 for flyrotary@lancaironline.net; Wed, 10 Nov 2004 08:56:45 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041110135608.NSGA2410.imf24aec.mail.bellsouth.net@rd> for ; Wed, 10 Nov 2004 08:56:08 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] best cruise altitude and power, turbo folks may delete- was Re: EWP Info- Lynn? Date: Wed, 10 Nov 2004 07:56:30 -0600 Message-ID: <00b901c4c72d$147c6950$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00BA_01C4C6FA.C9E1F950" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_00BA_01C4C6FA.C9E1F950 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The 7300 rpm test was at 1500 ft. IAS was bouncing (rough air) around = 224 and the EM2 TAS was showing 235 but I have not calibrated the TAS = function yet. Its probably on the optimistic side. Or maybe oil on the belly = makes me go faster : )=20 From memory, I have not had the Renesis over 6000 ft nor have I even attempted to measure maximum speed above 2000 ft. =20 Tracy (making longer intake runners for the shoebox manifold)=20 =20 Thanks for the info Tracy. Oddly, I've only done top speed tests above = 5000 feet recently, so I don't have anything to directly compare. =20 I'm wondering what the "normal" best cruise speed altitude will be for = us. With a certified relic (engine), you're only allowed to run 75% power continuously, so the best cruise speed is the highest altitude where you = can still make 75% power. As I understand it, that's about 8000 feet. Van = has always been irritated by people giving speed figures for RV's without following the "standard" practice of measuring it at 8000 feet. In our = case though, we're not limited by the 75% power rule. =20 =20 It's hard to let go of the 8000 foot rule of thumb, but I guess it = really doesn't apply. I'm sure there's a level of HP that would be considered = a safe max for extended operation, but I have no idea what that is. Has anyone designated a max HP level for continuous operation? =20 =20 Rusty (haven't got anything done on my oil scoop or TB inlet) =20 =20 ------=_NextPart_000_00BA_01C4C6FA.C9E1F950 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

The 7300 rpm test=20 was at 1500 ft. IAS was bouncing (rough air) around 224 and the EM2 = TAS was=20 showing 235 but I have not calibrated the TAS function yet. Its = probably=20 on the optimistic side. Or maybe oil on the belly makes me go = faster :=20 )

From memory, I have not had the Renesis over 6000 ft nor have I = even=20 attempted to measure maximum speed above 2000 ft.

Tracy (making longer intake runners for the shoebox = manifold)

Thanks=20 for the info Tracy. Oddly, I've only done top speed tests above = 5000 feet=20 recently, so I don't have anything to directly = compare.

I'm=20 wondering what the "normal" best cruise speed altitude will be for=20 us. With a certified relic (engine), you're only allowed to run = 75% power=20 continuously, so the best cruise speed is the highest altitude where you = can=20 still make 75% power. As I understand it, that's about 8000 = feet. =20 Van has always been irritated by people giving speed figures for RV's = without=20 following the "standard" practice of measuring it at 8000 feet. In = our=20 case though, we're not limited by the 75% power rule. =

It's=20 hard to let go of the 8000 foot rule of thumb, but I guess it really = doesn't=20 apply. I'm sure there's a level of HP that would be considered a = safe max=20 for extended operation, but I have no idea what that is. Has = anyone=20 designated a max HP level for=20 continuous operation?

Rusty=20 (haven't got anything done on my oil scoop or TB = inlet)

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