Return-Path: Received: from bewersdorff.com ([192.220.83.90] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with SMTP id 2633466 for flyrotary@lancaironline.net; Sun, 12 Oct 2003 02:38:35 -0400 Received: (qmail 23524 invoked by uid 21338); 12 Oct 2003 06:38:30 -0000 Received: from unknown (HELO rapunzel) ([216.101.149.124]) (envelope-sender ) by 192.220.83.90 (qmail-ldap-1.03) with SMTP for ; 12 Oct 2003 06:38:30 -0000 From: "Marko Bewersdorff" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: solo's & Delta T... no more emergencies Date: Sat, 11 Oct 2003 23:37:17 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_04F5_01C39050.9B770D80" 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 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_04F5_01C39050.9B770D80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit hmm - put a switch on the throttle - full(ish) throttle = pump gets full voltage. nerdy approach #2 dunno what the controllers water temp probe looks like - but that needs to be moved close to the stream coming from the sparkplug area, or put a cht sparkplug-gasket style probe on the hottest sparkplug and see if local boiling can be forecast by a certain temp increase ... gotta eat pancakes now... Marko -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Haywire Sent: Saturday, October 11, 2003 11:10 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: solo's & Delta T... no more emergencies 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_04F5_01C39050.9B770D80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

hmm -=20 put a switch on the throttle - full(ish) throttle =3D pump gets full=20 voltage.

nerdy=20 approach #2

dunno=20 what the controllers water temp probe looks like - but that needs to be = moved=20 close to the stream coming from the sparkplug area, = or

put a=20 cht sparkplug-gasket style probe on the hottest sparkplug and see if = local=20 boiling can be forecast by a certain temp increase = ...

gotta=20 eat pancakes now...

Marko

-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of=20 Haywire
Sent: Saturday, October 11, 2003 11:10 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: solo's = &=20 Delta T... no more emergencies

Hi=20 Bill;

    Sorry I haven't responded to questions and = comments=20 sooner, but I've been a little busy flying and trying to get a hay = barn built=20 before 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=20 T 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=20 the 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=20 out, I'd see a sudden spike in the pressure, followed a few seconds = later by a=20 temp increase and an immediate increase in flow rate. This indicates = (to me)=20 possible localized boiling in the block for a few seconds until the = flow=20 increases again, reducing the pressure. For this reason I've taken to=20 switching the pump to bypass the controller while practicing touch = &=20 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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