Today's Message Index:
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1. 04:25 PM - Hi CHT on the Rotax 912uls (Rich L)
2. 08:18 PM - Re: Hi CHT on the Rotax 912uls (Roger Lee)
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| Subject: | Hi CHT on the Rotax 912uls |
A lot has been said about the 912uls cooling. I have had CHT temps over 240 degF
for over 2 years in the summer. Not to red line but Not Comfortable to fly any
distance with. I have over 1100 hours on my Kitfox S7 and my Evans "lifetime"
coolant and was ready for a change. I read an article, (I think by Roger) about
using 50/50 Antifreeze instead of Evans would reduce bring the temps by 25
to 30 degrees.
It works!!!! My CHT and Coolant Temp are down 25 degrees today with the same OAT
as when they were in the 240 range. I am ready to take a summer trip again.
BTW, I chose Prestone DexCool (Orange). Thanks Roger
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Rich Little
N812RL S-7 912ULS
North Idaho
Kiev Prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402577#402577
Message 2
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| Subject: | Re: Hi CHT on the Rotax 912uls |
Your Welcome.
Evans isn't a bad coolant it just comes with a temp penalty. I wouldn't use it
unless my engine was an open air engine. These newer tight cowled aircraft just
don't help out much for cooling. To help keep down radiated and convective heat
on the inside of the cowl on all the hoses and wiring you can use some header
wrap on the exhaust pipes from the head down and under the springs. Many of
us have been doing this for 10+ years without any issues. The header wrap can
be purchased from most automotive stores.
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Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402590#402590
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