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Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 451593 for flyrotary@lancaironline.net; Sun, 03 Oct 2004 21:37:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041004013725.IQKQ1789.imf25aec.mail.bellsouth.net@rd> for ; Sun, 3 Oct 2004 21:37:25 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: First post Ivan flight Date: Sun, 3 Oct 2004 20:37:46 -0500 Message-ID: <004401c4a9b2$c06e1850$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01C4A988.D7981050" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0045_01C4A988.D7981050 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I almost always accelerate to 120 mph for my climb as that has = previously given the best rate of climb for my somewhat heavy RV-6A. This new prop = and gear box have increased roc by approx 500 fpm based on the one flight to approx 1500 fpm. =20 However, with the larger prop I think I need to do some more testing as = a slower speed but faster roc just might be in the cards.=20 =20 I'd bet they are. My RV-3 has always defied the "standard RV" 120 mph = best ROC rule. Best ROC has always been in the 90 to 100 mph range, though = it's also done well at higher speeds. I believe Tracy mentioned that he's = seen a trend toward best ROC being at lower speeds since he went to the 2.85 = drive. My only SWAG is that we have more torque, so we're able to produce more power without having to unload the prop as much as you would at higher speeds. =20 =20 Well, its clear that a total of 28 sq inches core inlet is more than adequate for a 13B at cruise around 5200-5400 rpm and 8 gph. My oil and coolant stayed at 165-170 with OAT at 70F. However, when I bumped the = rpm up to 6300-6400 the oil rose to 200F and the coolant to 205F before stabilizing given me a true airspeed of right at 200 MPH burning 11.8 = gph. So It appears I need to open my left core inlet back up a bit from its current 10 sq inches to approx 18 sq inches. =20 =20 I don't follow your logic here. You're saying that full throttle cruise = is 200 F oil and 205 F coolant? What the heck is wrong with that ? =20 Hope to see you there. Any chance of you attending Charlie England's = flyin in Mississippi weekend of the 16 Oct?=20 =20 Nope, no chance for the 16th. Basically, I've got 3 weekend to fly off = my remaining 7.3 hours, and do some additional testing. If anything else = goes wrong, even Tracy's fly-in is off for me. To be honest, I'm still = kinda bummed that it's being move to a different location. I would have voted = for postponing, rather than moving. =20 =20 Cheers, Rusty (selling Airbike in 22 minutes) =20 =20 ------=_NextPart_000_0045_01C4A988.D7981050 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

I almost always accelerate to 120 mph = for my climb=20 as that has previously given the best rate of climb for my somewhat = heavy=20 RV-6A. This new prop and gear box have increased roc by approx = 500 fpm=20 based on the one flight to approx 1500 fpm.

However, with the larger = prop I think I=20 need to do some more testing as a slower speed but faster roc just might = be in=20 the cards.

I'd bet they are. My RV-3 has always = defied=20 the "standard RV" 120 mph best ROC rule. Best ROC has = always=20 been in the 90 to 100 mph range, though it's also done well at higher=20 speeds. I believe Tracy mentioned that he's seen a trend = toward best=20 ROC being at lower speeds since he went to the 2.85 drive. My only = SWAG is=20 that we have more torque, so we're able to produce more power=20 without having to unload the prop as much as you would at higher=20 speeds.

Well, its clear that a total of = 28 sq inches=20 core inlet is more than adequate for a 13B at cruise around = 5200-5400 rpm=20 and 8 gph. My oil and coolant stayed at 165-170 with OAT at 70F. = However,=20 when I bumped the rpm up to 6300-6400 the oil rose to 200F and the = coolant to=20 205F before stabilizing given me a true airspeed of right at 200 MPH = burning=20 11.8 gph. So It appears I need to open my left = core inlet back=20 up a bit from its current 10 sq inches to approx 18 sq=20 inches.

I don't=20 follow your logic here. You're saying that full throttle = cruise is=20 200 F oil and 205 F coolant? What the heck is wrong = with=20 that ?

Hope to see you there. Any = chance of=20 you attending Charlie England's flyin in Mississippi weekend of the 16 = Oct?

Nope, no chance for the 16th. = Basically, I've got=20 3 weekend to fly off my remaining 7.3 hours, and do some additional=20 testing. If anything else goes wrong, even Tracy's = fly-in is off=20 for me. To be honest, I'm still kinda bummed that it's being = move to=20 a different location. I would have voted for postponing, rather = than=20 moving.

Cheers,

Rusty (selling Airbike in 22=20 minutes)

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