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Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 451644 for flyrotary@lancaironline.net; Sun, 03 Oct 2004 23:43:40 -0400 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-069-132-109-019.carolina.rr.com [69.132.109.19]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i943h7Zg000945 for ; Sun, 3 Oct 2004 23:43:08 -0400 (EDT) Message-ID: <000e01c4a903$897ec880$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: First post Ivan flight Date: Sun, 3 Oct 2004 00:43:32 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C4A8E2.02259830" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4A8E2.02259830 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageWell, actually Rusty, nothing is wrong with the 200F temps, just = that I am use to max temps of 180-185 at WOT. Of course, I was = producing less power then. Also, it was on a 70F day, so temps would = undoubtedly increase with a 90F+ day. So just a bit of reserve is = needed - in my opinion. But, I might just wait until warmer OAT dictate = it {:>) Ed ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Sunday, October 03, 2004 9:37 PM Subject: [FlyRotary] Re: First post Ivan flight 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. 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 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 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 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 = ? Hope to see you there. Any chance of you attending Charlie England's = flyin in Mississippi weekend of the 16 Oct?=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 Cheers, Rusty (selling Airbike in 22 minutes) ------=_NextPart_000_000B_01C4A8E2.02259830 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Well, actually Rusty, nothing is = wrong with=20 the 200F temps, just that I am use to max temps of 180-185 at WOT. = Of=20 course, I was producing less power then. Also, it was on a 70F = day, so=20 temps would undoubtedly increase with a 90F+ day. So just a bit of = reserve=20 is needed - in my opinion. But, I might just wait until = warmer OAT=20 dictate it {:>)

----- Original Message -----
From:=20 Russell=20 Duffy
To: Rotary motors in = aircraft

Sent: Sunday, October 03, 2004 = 9:37=20 PM

Subject: [FlyRotary] Re: First = post Ivan=20 flight

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

However, with the larger = prop I think=20 I need to do some more testing as a slower speed but faster roc just = might be=20 in 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=20 toward best ROC being at lower speeds since he went to the 2.85=20 drive. My only SWAG is that we have more torque, so we're able = to=20 produce more power without having to unload the prop as much as = you would=20 at higher speeds.

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

I=20 don't follow your logic here.  You're saying that full = throttle=20 cruise is 200 F oil and 205 F coolant?  What the heck=20 is wrong with 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=20 got 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=20 off for me.   To be honest, I'm still kinda bummed that it's = being=20 move to a different location. I would have voted for postponing, = rather=20 than moving.

Cheers,

Rusty (selling Airbike in 22=20 minutes)

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