Today's Message Index:
----------------------
1. 06:23 AM - Re: ? Re: Radiator for 582 (TheWanderingWench)
2. 10:33 AM - Re: ? Re: Radiator for 582 (FLYaDIVE)
3. 11:38 AM - Re: ? Re: Radiator for 582 (Richard Girard)
4. 11:42 AM - New Rotax SI about oils (Richard Girard)
Message 1
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| Subject: | Re: ? re: Radiator for 582 |
Roger, you say to pick up a "small used radiator." =0A=0AHow do you calcula
te how large/small a radiator needs to be? Rick Girard writes about looking
for a motorcycle radiator of about 100 sq. in. in a tractor configuration.
(Thanks, Rick, for sharing the detailed article.) I've got a pusher config
uration, so the prop isn't a cooling factor. =0A=0A=0AArty Trost=0ASandy, O
R=0A=0A-=0Awww.LessonsFromTheEdge.com/oshkosh/=0A=0A=0A"Life's a daring a
dventure or nothing"=0AHelen Keller=0A=0A=0A"I refuse to tip toe through li
fe just to arrive safely at death."=0A=0A=0A_______________________________
_=0AFrom: Roger Lee <ssadiver1@yahoo.com>=0ATo: rotaxengines-list@matronics
.com=0ASent: Monday, August 29, 2011 2:23 PM=0ASubject: RotaxEngines-List:
Lee" <ssadiver1@yahoo.com>=0A=0AHi Arty,=0A=0AThe answer is yes and yes. G
o to a junk yard and pick up a small used radiator. You can use any water t
emp gauge for the most part that was designed for that.=0A=0A--------=0ARog
er Lee=0ATucson, Az.=0ALight Sport Repairman - Maintenance Rated=0ARotax Re
pair Center - Heavy Maint. Rated=0AHome 520-574-1080- TRY HOME FIRST=0ACe
ll 520-349-7056=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://foru
=================
Message 2
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| Subject: | Re: ? re: Radiator for 582 |
Arty:
This is one case where Bigger is Better.
Install as large a radiator as you can fit. If too large you can always
block the vanes to increase the temps. If too small... Well, you are up
the preventable creak without the paddle.
But, if you want to do the math, you will need to know the following:
How many BTU's the engine produces. You could always use the HP and divide
it in half since most of the heat goes out the exhaust.
Then convert HP to BTU's - There are programs on the Web to do that. Then
the simple rule of thumb is to take that and use 25% to 33% for
the dissipation requirement of the radiator.
These and ANY numbers given are guess-ta-mates because of factors such as
Air temp, Quality of Cowling & Baffling, Moisture in the air, type of
coolant and coolant flow rate.
Here is a link - But, I'm betting it is more info than you want to know...
http://www.overclockers.com/radiator-heat-dissipation-testing/
Just remember... Bigger is Better in THIS case.
Barry
On Tue, Aug 30, 2011 at 9:20 AM, TheWanderingWench <
thewanderingwench@yahoo.com> wrote:
> Roger, you say to pick up a "small used radiator."
> How do you calculate how large/small a radiator needs to be? Rick Girard
> writes about looking for a motorcycle radiator of about 100 sq. in. in a
> tractor configuration. (Thanks, Rick, for sharing the detailed article.)
> I've got a pusher configuration, so the prop isn't a cooling factor.
>
> Arty Trost
> Sandy, OR
>
> www.LessonsFromTheEdge.com/oshkosh/
>
> "Life's a daring adventure or nothing"
> Helen Keller
>
>
> "I refuse to tip toe through life just to arrive safely at death."
> ------------------------------
> *From:* Roger Lee <ssadiver1@yahoo.com>
> *To:* rotaxengines-list@matronics.com
> *Sent:* Monday, August 29, 2011 2:23 PM
> *Subject:* RotaxEngines-List: ? re: Radiator for 582
>
>
> Hi Arty,
>
> The answer is yes and yes. Go to a junk yard and pick up a small used
> radiator. You can use any water temp gauge for the most part that was
> designed for that.
>
> --------
> 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=3ronics.com/Navigator?RotaxEngines-List"
> target="_blank">http://www.matron
> <http://forums.matronics.com/viewtopic.php?p=350947#350947>http://forums.ma
> &nbs//www.matronics.com/contribution"
> target="_blank">http://www.matronics.co=================
>
>
> <http://forums.matronics.com>
>
> *
>
> *
>
>
Message 3
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| Subject: | Re: ? re: Radiator for 582 |
Arty, You misunderstood the point of my article which was about finding a
suitable radiator for a 582 in a PUSHER configuration, specifically that the
Rotax twin radiators are not suitable, IMHO, for that configuration. The
pictures, both in the article and those included in the post show the Honda
radiator used in a pusher configuration.
There's one other consideration that might be of interest to you. The Honda
Sabre / Magna radiator has a nice compact cooling fan and mounting frame
that can often be had with the radiator, depending on the supplier. I've
never had a reason to use it, but you might be interested if you operate at
airports where you have long taxis or they are busy enough that you find
yourself having to wait in line to take off. Nice to be able to just flip a
switch and know you have sufficient airflow through the radiator to keep
things within specs.
As for the bigger is better argument, well, hmmm. Bigger is more weight and
most likely more drag, both anathema to aircraft. As I pointed out, going to
a one piece radiator as opposed to a two piece is more efficient since the
air goes through the radiator rather than around. In a single pass radiator
of brass construction, 100 sq. in. of area is the minimum I would condider
for a 582. I've had the opportunity to test it in 110 degree heat this
summer in my Kolb Mk III and it kept everything within parameters during
full power climbs of 6 minutes. From my home field, elevation 1270', that's
a climb to 5000' in the Kolb. Since OAT generally goes down with altitude I
have no reason to believe that longer climbs would cause any problems.
Rick
On Tue, Aug 30, 2011 at 12:30 PM, FLYaDIVE <flyadive@gmail.com> wrote:
> Arty:
>
> This is one case where Bigger is Better.
> Install as large a radiator as you can fit. If too large you can always
> block the vanes to increase the temps. If too small... Well, you are up
> the preventable creak without the paddle.
>
> But, if you want to do the math, you will need to know the following:
> How many BTU's the engine produces. You could always use the HP and divide
> it in half since most of the heat goes out the exhaust.
> Then convert HP to BTU's - There are programs on the Web to do that. Then
> the simple rule of thumb is to take that and use 25% to 33% for
> the dissipation requirement of the radiator.
> These and ANY numbers given are guess-ta-mates because of factors such as
> Air temp, Quality of Cowling & Baffling, Moisture in the air, type of
> coolant and coolant flow rate.
>
> Here is a link - But, I'm betting it is more info than you want to know...
> http://www.overclockers.com/radiator-heat-dissipation-testing/
>
> Just remember... Bigger is Better in THIS case.
>
> Barry
> On Tue, Aug 30, 2011 at 9:20 AM, TheWanderingWench <
> thewanderingwench@yahoo.com> wrote:
>
>> Roger, you say to pick up a "small used radiator."
>> How do you calculate how large/small a radiator needs to be? Rick Girard
>> writes about looking for a motorcycle radiator of about 100 sq. in. in a
>> tractor configuration. (Thanks, Rick, for sharing the detailed article.)
>> I've got a pusher configuration, so the prop isn't a cooling factor.
>>
>> Arty Trost
>> Sandy, OR
>>
>> www.LessonsFromTheEdge.com/oshkosh/
>>
>> "Life's a daring adventure or nothing"
>> Helen Keller
>>
>>
>> "I refuse to tip toe through life just to arrive safely at death."
>> ------------------------------
>> *From:* Roger Lee <ssadiver1@yahoo.com>
>> *To:* rotaxengines-list@matronics.com
>> *Sent:* Monday, August 29, 2011 2:23 PM
>> *Subject:* RotaxEngines-List: ? re: Radiator for 582
>>
>> >
>>
>> Hi Arty,
>>
>> The answer is yes and yes. Go to a junk yard and pick up a small used
>> radiator. You can use any water temp gauge for the most part that was
>> designed for that.
>>
>> --------
>> 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=3ronics.com/Navigator?RotaxEngines-List"
>> target="_blank">http://www.matron
>> <http://forums.matronics.com/viewtopic.php?p=350947#350947>http://forums.ma
>> &nbs//www.matronics.com/contribution"
>> target="_blank">http://www.matronics.co=================
>>
>>
>>
>>
>>
>> <http://forums.matronics.com>
>>
>> *
>>
>> ist" target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
>> tp://forums.matronics.com
>> _blank">http://www.matronics.com/contribution
>> *
>>
>>
> *
>
> *
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 4
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| Subject: | New Rotax SI about oils |
Given the interest in the subject of suitable oil for the 912 / 914 engines,
Rotax has just released SI-912-016 / 914-019 R4 with their latest
recommendations.
Rick Girard
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
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