---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 08/30/11: 4 ---------------------------------------------------------- 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 _____________________________________ Time: 06:23:33 AM PST US From: TheWanderingWench Subject: Re: RotaxEngines-List: ? 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 =0ATo: rotaxengines-list@matronics .com=0ASent: Monday, August 29, 2011 2:23 PM=0ASubject: RotaxEngines-List: Lee" =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 _____________________________________ Time: 10:33:39 AM PST US Subject: Re: RotaxEngines-List: ? re: Radiator for 582 From: FLYaDIVE 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 > *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.ma > &nbs//www.matronics.com/contribution" > target="_blank">http://www.matronics.co================= > > > > > * > > * > > ________________________________ Message 3 _____________________________________ Time: 11:38:05 AM PST US Subject: Re: RotaxEngines-List: ? re: Radiator for 582 From: Richard Girard 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 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 >> *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.ma >> &nbs//www.matronics.com/contribution" >> target="_blank">http://www.matronics.co================= >> >> >> >> >> >> >> >> * >> >> 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 _____________________________________ Time: 11:42:19 AM PST US Subject: RotaxEngines-List: New Rotax SI about oils From: Richard Girard 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.