Return-Path: Received: from [199.185.220.222] (HELO priv-edtnes12-hme0.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2633442 for flyrotary@lancaironline.net; Sun, 12 Oct 2003 02:09:57 -0400 Received: from Endurance ([209.53.248.123]) by priv-edtnes12-hme0.telusplanet.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with SMTP id <20031012060954.VDYW29998.priv-edtnes12-hme0.telusplanet.net@Endurance> for ; Sun, 12 Oct 2003 00:09:54 -0600 From: "Haywire" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: solo's & Delta T... no more emergencies Date: Sat, 11 Oct 2003 23:09:47 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005E_01C3904C.C3F36B90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_005E_01C3904C.C3F36B90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi Bill; Sorry I haven't responded to questions and comments sooner, but I've been a little busy flying and trying to get a hay barn built before winter. I don't have a OAT sensor on my plane but the ground temp was 9C. I took it up to 13000, where it should have been ~ -17C. Oddly enough I seem to have a constant 20C delta T on the coolant but the oil delta T will vary between 5 and 20 degrees depending on power load. The temperature controller works very well to keep the temp at 85C except during a full power climb where it will gradually close on 100C even pumping full speed. I also don't have fuel flow right now, but I hope to both and much more as soon as the EM2 is available. I have a switch which allows me to bypass the controller and apply buss power directly to the pump. While doing circuits I was closely watching the cooling temp/press/flow. During descent all three would decrease and the pump would flow minimum coolant as it tried to maintain temp, however what concerned me was that I'd touch down then apply full power for a climb out, I'd see a sudden spike in the pressure, followed a few seconds later by a temp increase and an immediate increase in flow rate. This indicates (to me) possible localized boiling in the block for a few seconds until the flow increases again, reducing the pressure. For this reason I've taken to switching the pump to bypass the controller while practicing touch & goes. S. Todd Bartrim Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass". Todd, At what power setting and/or fuel flow were the data taken? Another queston Todd, What was the OAT during your taking this data? Bill Schertz ------=_NextPart_000_005E_01C3904C.C3F36B90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi=20 Bill;

Sorry I haven't responded to questions and = comments sooner,=20 but I've been a little busy flying and trying to get a hay barn built = before=20 winter.

I don't have a OAT sensor on my plane but = the ground=20 temp was 9C. I took it up to 13000, where it should have been ~ -17C. = Oddly=20 enough I seem to have a constant 20C delta T on the coolant but the oil = delta T=20 will vary between 5 and 20 degrees depending on power load. The = temperature=20 controller works very well to keep the temp at 85C except during a full = power=20 climb where it will gradually close on 100C even pumping full speed. I = also=20 don't have fuel flow right now, but I hope to both and much more as soon = as the=20 EM2 is available.

I have a switch which allows me to bypass the = controller=20 and apply buss power directly to the pump. While doing circuits I was = closely=20 watching the cooling temp/press/flow. During descent all three would = decrease=20 and the pump would flow minimum coolant as it tried to maintain temp, = however=20 what concerned me was that I'd touch down then apply full power for a = climb out,=20 I'd see a sudden spike in the pressure, followed a few seconds later by = a temp=20 increase and an immediate increase in flow rate. This indicates (to me) = possible=20 localized boiling in the block for a few seconds until the flow = increases again,=20 reducing the pressure. For this reason I've taken to switching the pump = to=20 bypass the controller while practicing touch & = goes.

S. Todd Bartrim
Turbo 13B = RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

= =20 "Whatever you vividly imagine, Ardently desire, Sincerely believe in,=20 Enthusiastically act upon, Must inevitably come to pass".

Todd,

At = what power=20 setting and/or fuel flow were the data taken?

Another queston Todd, What was the = OAT during=20 your taking this data?

Bill=20 = Schertz

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