From: "Christian And Tamara Mcdonald christamarmc@gmail.com" <flyrotary@lancaironline.net>
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Date: Fri, 27 Jul 2018 11:04:29 +1000
Subject: Re: [FlyRotary] cooling
Message-Id: <7C26A95D-BDD5-432B-8C26-59AFCBA44178@gmail.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Hey excellent Neil
Will be interesting to see how she flies tas when u get her fine tuned

Cheers

Sent from my iPhone

> On 27 Jul 2018, at 7:57 am, Neil Unger 12348ung@gmail.com <flyrotary@lanca=
ironline.net> wrote:
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> Steve and Chris,
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>                                   Finally got the fibreglass dry and fired=
 up the revised cooling system and temp as follows Water 90 degrees, (on the=
rmostat) Oil  80 degrees, and oil to reduction box 70 degrees ( from oil coo=
ler).  To fill other in on how stupid I can be,  I had the original set up, t=
hat ran far too cool, so I also believed that I was getting massive cooling d=
rag as my sportsman could only get 120 Kts instead of the usual 135 kts.  So=
 I set about making up a very sexy cowling where the air from the radiator e=
xhausted into the cowling.  This put the gap between the radiator and the su=
mp of only 4 - 6 inches,  which worked well in that all it did was heat the o=
il in the sump marvelously!!  I was getting oil temps 20 degrees hotter than=
 the water.  So after booting the cat many times in frustration, I finally r=
ealised that I had to exhaust the rads into the outside air as per the origi=
nal.  Fibreglass in the middle of winter ????.
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> Final part of the jig saw was that when I removed the original set up to m=
ount my new engine and cowling, I found that I had never bolted the positive=
 lead to the back coil, and it has come off who knows when?  Result I was fl=
ying with the back rotor on the trailing plug only!!! Hence the slower speed=
 which I thought was the cooling drag!
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> So basically I am now right back where I started as per cooling exhausting=
 into the outside air,  A lot more experience that I did not need and confir=
mation that I am an idiot!
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> Neil Unger.
>=20
>=20
> --
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