Today's Message Index:
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1. 07:23 AM - Rotax Cylinder Head temperature gauge (Hugh McKay)
2. 09:54 AM - Re: Rotax Cylinder Head temperature gauge (John Albury)
3. 03:39 PM - Coolant Hose (Hugh McKay)
4. 06:39 PM - Re: Coolant Hose (Robert Borger)
5. 06:50 PM - Re: Coolant Hose (Pete Christensen)
Message 1
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| Subject: | Rotax Cylinder Head temperature gauge |
I recently had a sudden loss of coolant on my 912 UL engine which
required cylinder head replacement (new style heads). During the loss of
coolant incident my Rotax CHT gauge was =9Cpegged=9D for
about 8 to 10 minutes before I safely landed the plane. My question is
since the gauge was =9Cpegged=9D during this time has it
been damaged, or can I just re-label it and use it with the new cylinder
heads that measure the actual coolant temperature?
Hugh G. McKay III
Allegro 2000
Rotax 912 UL
email hgmckay@bellsouth.net
Message 2
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| Subject: | Re: Rotax Cylinder Head temperature gauge |
Hi Hugh, I would run the fixed engine with the original gauges and look for
normal indications. If all appears normal then continue with normal operat
ions. If non-normal indications are noted then replace the gauge.John=C2-
On Saturday, January 14, 2017 9:24 AM, Hugh McKay <hgmckay@bellsouth.ne
t> wrote:
I recently had a sudden loss of coolant on my 912 UL engine which required
cylinder head replacement (new style heads). During the loss of coolant in
cident my Rotax CHT gauge was =9Cpegged=9D for about 8 to 10 mi
nutes before I safely landed the plane. My question is since the gauge was
=9Cpegged=9D during this time has it been damaged, or can I jus
t re-label it and use it with the new cylinder heads that measure the actua
l coolant temperature?=C2-Hugh G. McKay IIIAllegro 2000Rotax 912 UL
email hgmckay@bellsouth.net
Message 3
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I am replacing the large 1 inch inside =9Ddiameter coolant hose on my
912 engine. All of this large coolant hose and the radiator is under the
cowl in my Allegro 2000 so the ambient operating temperature is much
higher than an exposed 912 engine. I have looked into using silicone
hose because of its higher temperature rating but I have found out that
the water permeation rate through silicone hose is 10 to 15 times normal
2 ply heater hose. The temperature rating on normal 2 ply hose is only
125 degrees C, where the silicone hose is rated at 170 degrees C +/-. Is
anyone out there using silicone coolant hose? If so what is your
experience? If you are not using silicone hose what have you replaced
the original Rotax hose with?
Hugh G. McKay III
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
Message 4
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| Subject: | Re: Coolant Hose |
Hugh,
FWIW, all the coolant hoses on my 914 are silicone. They seem to be
working just fine, no problems at all.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com <mailto:rlborger@mac.com>
On Jan 14, 2017, at 5:38 PM, Hugh McKay <hgmckay@bellsouth.net> wrote:
I am replacing the large 1 inch inside =EF=BDdiameter coolant hose on
my 912 engine. All of this large coolant hose and the radiator is under
the cowl in my Allegro 2000 so the ambient operating temperature is much
higher than an exposed 912 engine. I have looked into using silicone
hose because of its higher temperature rating but I have found out that
the water permeation rate through silicone hose is 10 to 15 times normal
2 ply heater hose. The temperature rating on normal 2 ply hose is only
125 degrees C, where the silicone hose is rated at 170 degrees C +/-. Is
anyone out there using silicone coolant hose? If so what is your
experience? If you are not using silicone hose what have you replaced
the original Rotax hose with?
Hugh G. McKay III
Ph. 704-661-8271
Fax 704-483-5466
email hgmckay@bellsouth.net
<Hugh.vcf>
Message 5
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| Subject: | Re: Coolant Hose |
Kitfox III, no problems. I add an ounce or two of coolant once in awhile. 9
years using silicone.
Pete
> On Jan 14, 2017, at 5:38 PM, Hugh McKay <hgmckay@bellsouth.net> wrote:
>
> I am replacing the large 1 inch inside =C2=9Ddiameter coolant hose on my 9
12 engine. All of this large coolant hose and the radiator is under the cowl
in my Allegro 2000 so the ambient operating temperature is much higher than
an exposed 912 engine. I have looked into using silicone hose because of it
s higher temperature rating but I have found out that the water permeation r
ate through silicone hose is 10 to 15 times normal 2 ply heater hose. The te
mperature rating on normal 2 ply hose is only 125 degrees C, where the silic
one hose is rated at 170 degrees C +/-. Is anyone out there using silicone c
oolant hose? If so what is your experience? If you are not using silicone ho
se what have you replaced the original Rotax hose with?
>
> Hugh G. McKay III
> Ph. 704-661-8271
> Fax 704-483-5466
> email hgmckay@bellsouth.net
> <Hugh.vcf>
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