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akfotoman
Joined: 19 Apr 2006
Posts: 120
Location: Anchorage, Alaska
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 Posted: Wed Jun 28, 2006 11:28 pm Post subject: R-582 issues |
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Does anyone have any information about the exact proper cooling temp for a 582 running an E-gear box with a three bladed prop in the pushing mode? I am constantly running up to 185-190F temps on climb out and cruise. I hear using higher octane fuel, and Dex-cool mixed at 1:1 H20 is the proper combination. Any thoughts?
RS
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fredm(at)cisco.com
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| Posted: Thu Jun 29, 2006 4:36 am Post subject: R-582 issues |
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Check the rotax manuals on line I think they say 130-140F. First think I'd check is the thermostat.
Fred
From: owner-rotaxengines-list-server(at)matronics.com [mailto:owner-rotaxengines-list-server(at)matronics.com] On Behalf Of Rob Stapleton
Sent: Thursday, June 29, 2006 3:09 AM
To: rotaxengines-list(at)matronics.com
Subject: R-582 issues
Does anyone have any information about the exact proper cooling temp for a 582 running an E-gear box with a three bladed prop in the pushing mode? I am constantly running up to 185-190F temps on climb out and cruise. I hear using higher octane fuel, and Dex-cool mixed at 1:1 H20 is the proper combination. Any thoughts?
RS
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Malcolmbru(at)aol.com
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| Posted: Thu Jun 29, 2006 6:16 pm Post subject: R-582 issues |
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is the thermostat opening properly? is the gage right? can you see a temp drop when the thermostat opens? 136%it should cycle a couple of times before going to 140 or more. has these been happening long? or just started? you should find someone with a similar set up. how are the egt temps? good luck mal
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Bob Griffin
Joined: 22 Jan 2006
Posts: 34
Location: Slingerlands,NY
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| Posted: Fri Jun 30, 2006 2:35 am Post subject: R-582 issues |
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Hi Rob, When I 1st ran my Kolb mk3 my 618 was running those same temps in climb. I was using the twin radiator set up. As a pusher, the radiator sat behind the eng. and wing , I tried to increase the airflow by removing the intake silencer, then putting scoops on the sides of the rad. Finally, one of Phil Lockwoods techs whispered to me at Sun & Fun, "It's not enough radiator in that configuration". I went to a local radiator shop and he set me up with a small aluminum and plastic Chrysler radiator for around $100 bucks. I mounted it in front of the eng and temps were normal from that day on.
Fly Safe
Bob Griffin
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Bob Griffin
Slingerlands, NY |
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Fri Jun 30, 2006 5:05 am Post subject: R-582 issues |
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Rob,
The Rotax 2-stroke Installation manual (available at
http://www.kodiakbs.com/tiintro.htm ) says:
.. The radiator must be of adequate size, and the airstream of
sufficeint intensity to maintain the coolant temperature below the
maximum permitted value of 80 degree Celsius or 175 degrees F under the
most sever conditions, i.e., at full load operation (= at take-off).
The average coolant temerature must be 60-80C (140-175F).
In case of pusher propellor installation, take partcular care that
coolant radiator has sufficient air flow.
The max. tmperature difference of the coolant between radiator entry
and exit must not exceed 6C (11F), the average difference must be
around 3 and 5C (5 and 9F).
If the temperature limits are esceeded or coolant flow rate is below
specified values (excessive flow resistance), vapour is produced in the
cylinder head, causing cooling break-down and engine damage.....
Thom in Buffalo
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Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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Richard Rabbers
Joined: 09 Jan 2006
Posts: 114
Location: Benton Harbor, MI - USA
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| Posted: Sat Jul 01, 2006 10:43 am Post subject: Re: R-582 issues |
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| Quote: | | "It's not enough radiator in that configuration".? |
Bob,
I have a 618 though have not yet flown it. I've wondered about the Rotax twin radiator set up which I think may fit inside the cowl of my round cowl model 1 Kitfox. My issues will not be the same as your 'pusher' set up but I'm interested in your Chrysler radiator - please relay the dimentions if it's not too much trouble - Thanks!
Richard / Michigan
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