X-Virus-Scanned: clean according to Sophos on Logan.com From: "Bill Bradburry" Received: from vms173025pub.verizon.net ([206.46.173.25] verified) by logan.com (CommuniGate Pro SMTP 6.1c2) with ESMTPS id 7444875 for flyrotary@lancaironline.net; Thu, 29 Jan 2015 15:06:03 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.25; envelope-from=bbradburry@verizon.net Received: from Desktop ([173.57.170.65]) by vms173025.mailsrvcs.net (Oracle Communications Messaging Server 7.0.5.32.0 64bit (built Jul 16 2014)) with ESMTPA id <0NIY000J8FT1YEQ0@vms173025.mailsrvcs.net> for flyrotary@lancaironline.net; Thu, 29 Jan 2015 14:05:26 -0600 (CST) X-CMAE-Score: 0 X-CMAE-Analysis: v=2.1 cv=CoYIqc8G c=1 sm=1 tr=0 a=jjhB2sdyIRGi5VbALRhQUw==:117 a=kUPQlYmSbg0A:10 a=o1OHuDzbAAAA:8 a=oR5dmqMzAAAA:8 a=-9mUelKeXuEA:10 a=YNv0rlydsVwA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=9iDbn-4jx3cA:10 a=cKsnjEOsciEA:10 a=gZbpxnkM3yUA:10 a=Ia-xEzejAAAA:8 a=RlE2CE2Vka7p4kvg8WEA:9 a=QEXdDO2ut3YA:10 a=SSmOFEACAAAA:8 a=A_aDtVy7TniQ2sgTc20A:9 a=nTOcgfoSxbsX-YCL:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 To: "'Rotary motors in aircraft'" References: In-reply-to: Subject: RE: [FlyRotary] Re: swirl / expansion tank configuration Date: Thu, 29 Jan 2015 14:05:26 -0600 Message-id: <85425AD5F4D14B6D94CEE4474E6407D1@Desktop> MIME-version: 1.0 Content-type: multipart/alternative; boundary="----=_NextPart_000_0015_01D03BCC.A1BC3E20" X-Mailer: Microsoft Office Outlook 11 Thread-index: AdA76ezMkIjI/g2aQIaoR5d/z2YBSgAE+YMw X-MIMEOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0015_01D03BCC.A1BC3E20 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Thanks, Steve. =20 What was going on when the water temp and pressure spiked? Was this = during the climb up to 11.5K? The OAT was pretty low..~40 degrees, does = the thin air have that much of a negative effect on cooling? I am a = flatlander and have never had occasion to get up that high. :>( =20 I am leaving about a pint or so of air in the top of my expansion tank. = The pressure goes to the cap pressure and is pretty stable there. I = wonder if I should leave more space? I have never noticed any leakage = of coolant out of the overflow, but it goes overboard if it leaks, and I = should see coolant residue I think. =20 Bill=20 =20 _____ =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20 Sent: Thursday, January 29, 2015 11:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: swirl / expansion tank configuration =20 =E2=80=8BBill, =20 Attached is a plot of coolant temperature, coolant pressure, outside air = temperature, and IAS for a recent flight. The flight consisted of two = touch and go's, a climb from 7200 ft to 11,500 ft MSL, a series of = stalls, slow flight, steep turns, and a descent to landing. A stock = type thermostat is used and a 14 psi cap is installed on the expansion = tank which has at least a quart of air space when cold. =20 Steve Boese RV6A, 1986 13B NA, RD1A, EC2 _____ =20 From: Rotary motors in aircraft on behalf = of Bill Bradburry Sent: Thursday, January 29, 2015 9:28 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: swirl / expansion tank configuration=20 =20 Seeing Lynn=E2=80=99s cooling system again gives me an easy way to ask = my question. I have been unable to locate a filler cap similar to the = one that is shown on top of the propane bottle. I can only find = pressure caps like the Stant lever cap shown on top of the RX-3 bottle. Does anyone have a source or can suggest one for a radiator filler cap? =20 Also I am wondering about the pressures that others are seeing in their = systems. I have a 21 pound cap on my system and the pressure = immediately goes to that pressure and stays there for the duration of = the flight. I think that others have seen pressures that are lower from = time to time during the flight and I would appreciate some anecdotal = evidence if others see different pressures. =20 Bill B ------=_NextPart_000_0015_01D03BCC.A1BC3E20 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Thanks, = Steve.

 

What was going on when the water = temp and pressure spiked?=C2=A0 Was this during the climb up to 11.5K?=C2=A0 The = OAT was pretty low..~40 degrees, does the thin air have that much of a negative effect = on cooling?=C2=A0 I am a flatlander and have never had occasion to get up = that high.=C2=A0 :>(

 

I am leaving about a pint or so of = air in the top of my expansion tank.=C2=A0 The pressure goes to the cap = pressure and is pretty stable there.=C2=A0 I wonder if I should leave more space?=C2=A0 = I have never noticed any leakage of coolant out of the overflow, but it goes = overboard if it leaks, and I should see coolant residue I = think.

 

Bill

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Thursday, January = 29, 2015 11:34 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = swirl / expansion tank configuration

 

=E2=80=8B= Bill,<= /p>

 

Attached is a = plot of coolant temperature, coolant pressure, outside air temperature, and = IAS for a recent flight.  The flight consisted of two touch and go's, a = climb from 7200 ft to 11,500 ft MSL, a series of stalls, slow flight, steep = turns, and a descent to landing.  A stock type thermostat is used and = a 14 psi cap is installed on the expansion tank which has at least a quart of = air space when cold.

 

Steve Boese

RV6A, 1986 13B NA, RD1A, EC2

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on = behalf of Bill Bradburry <flyrotary@lancaironline.net>
Sent: Thursday, January = 29, 2015 9:28 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = swirl / expansion tank configuration

 <= /p>

Seeing Lynn=E2=80=99s cooling system again = gives me an easy way to ask my question.  I have been unable to locate a filler cap = similar to the one that is shown on top of the propane bottle.  I can only = find pressure caps like the Stant lever cap shown on top of the RX-3 = bottle.

Does anyone have = a source or can suggest one for a radiator filler cap?

 

Also I am = wondering about the pressures that others are seeing in their systems.  I have a 21 = pound cap on my system and the pressure immediately goes to that pressure and = stays there for the duration of the flight.  I think that others have = seen pressures that are lower from time to time during the flight and I would = appreciate some anecdotal evidence if others see different = pressures.

 

Bill = B

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