Activity Stream

Activity Stream



  1. BryceKat added a post in a topic Over heating on Rotax 670   

    What tach are you using? Westachs are liars 😄
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  2. C5Engineer added a post in a topic Over heating on Rotax 670   

    I am with Chris on the low egts. An over pitched motor will create a lot of excess heat. You should be seeing 1000-1100 degrees on climbout at least. With my IVO prop I can watch the water temp go up in cruise just by bumping in some pitch. The in cowl radiators are also pretty notorious for overheating issues. As a result many have gone to belly radiators.
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  3. ChrisBolkan added a post in a topic Over heating on Rotax 670   

    This might be a stretch but you have incredibly low EGT's.
     
    That can indicate either a too rich condition, or too much load. if you are in a too much load condition, you might be able to pull the pitch back a bit, bring the EGT's up where they belong, and in doing so produce less heat because the engine won't be working so hard.
     
    Others mentioned the cowl lip and airflow..super important.
     
    Also you might consider running 10% coolant and distilled water. That might get you about 10 degrees.
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  4. ChrisBolkan added a post in a topic Johnson Creek   

    Just got back last night. What an epic trip! 76 miles in 4 days and three nights. 
     
    We did not float Johnson Creek this time. Johnson Creek only has two rapids. One at the beginning of the run upstream of the airstrip and one at the end. Two years ago we started at the airfield and floated Johnson Creek too, but it wasn't worth it. There was no pickup in the creek then. The only way we will float JC again is if starting from the airfield.
     
    We started at the JC/East Fork South Fork confluence at Yellow Pine and floated from there to Carey Creek on the Main Salmon. The rapids were big and juicy the whole way. There are no waterfalls on this run, but some of the rapids on the EFSF and SF will set your hair on fire! It was spectacular. I will post a link to video when my friend gets it done if anyone is interested.
     
    Yellow Pine now has spotty Verizon 1X service (voice and text only). The waitress at the restaurant told me it had been about 6 months. It was very handy to call home before we put on. 
     
    FYI, a friend flew to the JC airfield about a month ago and said the WIFI was not working there at the time. He does not know the current status of WIFI at the airstrip for anyone planning to go. 
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  5. Luked added a post in a topic Saving a Barnyard Mummy   

    I remember seeing the Merlin GT in Kitplanes back in the 90s. Don't remember much of the details, but I found this with a google search:
     
    http://en.wikipedia.org/wiki/Blue_Yonder_Merlin
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  6. EDMO added a post in a topic Over heating on Rotax 670   

    This can't possibly apply to cheek rads - But in all my reading of airflow thru rads, the books say that you need a large plenum chamber to slow down the air before it goes thru the rad, and the rad edges need to be sealed so the air cannot bypass it.
       I agree on the comments about the exit port, although I have read a larger ratio, like 3 or 5 to 1. 
    EdMO
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  7. EDMO added a post in a topic Saving a Barnyard Mummy   

    I think you can use the N-number and get the engine specs from the FAA site, If you don't know what engine it had originally.
    BTW:   There is a geared redrive for EA-81 on ebay for $1500 - but don't think this one had a heavy engine???
    EDMO
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  8. lostman added a post in a topic Saving a Barnyard Mummy   

    Randy,
     
    What kind of engine is he looking for? I actually have another Subaru engine that's already converted with a re-drive that I might be willing to sell if he's interested.
     
    It's nice to see people getting neglected planes back into the air!
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  9. 1avidflyer added a post in a topic Over heating on Rotax 670   

    One other idea to look at besides the bottom opening and lip, is to make sure the radiators are sealed off against the cowl.  Otherwise the air will try to go around the radiator instead of going through it.  If the radiators aren't sealed off a 582 will often run toward the warm side.  Using more water in your coolant mix is a help also.  Up to 90 % water and 10% antifreeze if freezing isn't an issue.  Jim Chuk 
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  10. Av8r3400 added a topic in Local Fly in's   

    AFF Meet and Greet. Poll
    Okay, here's how to settle this.

    I will host, at my campsite, an AFF Meet and Greet this Airventure.


    When do we want to do this?
    • 9 replies
    • 1,231 views


  11. Av8r3400 added a post in a topic Over heating on Rotax 670   

    As randy said, the opening and the lip on the exhaust side of the cowling is as critical, if not more than the inlet openings.

    I remember reading somewhere you are looking for an opening area with a 2:1 ratio of exhaust to inlet. The lip shape and size allows this opening to be smaller by generating aerodynamic flow while in motion.

    By the look of your cowl from the above photo, your muffler blocks much of the opening and the lip is completely gone.

    Having a spinner on an Avid "cheek" cowl aids flow into the inlets, too.
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  12. Av8r_Sed added a post in a topic Airventure 2014   

    I'm up for the weenie roast at Larry's Camp Chapter 75 if we can agree on the best time.  I'll be there from Monday for most of the week and can help setup/ cook / whatever.  Monday or Tuesday evening?
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  13. 959 added a post in a topic Over heating on Rotax 670   

    Thx for the reply.
    No to the spinner.
    Was trying to keep the install clean,thats why I didn't want to go to a belly mount.
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  14. wolves200 added a post in a topic Over heating on Rotax 670   

    quick question here Marv: are you using a spinner? if you do, fly without it, and check back with the temps!! let me explain a little, I saw a guy airflow analysis, and he had more or less same cooling setup as you; there was a flow caused by the spinner and it acted as screen preventing the air flowing into the vents, pretty much like yours...I can see you are routing one of the hoses very close to the "Y" exhaust, you know that particular piece is extremely hot.
     
    this is a very high end  performance engine, I strongly suggest go by the belly installation, save head aches and very flexible with radiators shapes.. meaning less money,  you can basically use whatever radiator you can find. 
     
     
    hope this helps; very nice installation by the way!
    Regards
    Dimi3
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  15. SuberAvid added a post in a topic Over heating on Rotax 670   

    You might be blocking a lot of the exit opening out of the bottom of the cowling and also looks like you had to remove the lip that creates the low pressure area.  You may have to open it up more and add another lip.
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  16. SuberAvid added a topic in "other aircraft your working on"   

    Saving a Barnyard Mummy
    Jeff is back in the game!.  We rescued this Merlin GT tonight but we were unsure if it would qualify as a Ramp mummy; a bit of damage and not to well stored but it looks rebuildable.  The critical parts are all there and not too much damage.  Will have to strip off the fabric to see what damage and rust there is and then recover it.  Any body have a good engine hanging around for Jeff?  He is already making airplane noises.







    • 7 replies
    • 1,564 views


  17. 959 added a post in a topic Over heating on Rotax 670   

    Pic of radiator





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  18. 959 added a topic in Technical tasks   

    Over heating on Rotax 670
    I have been fighting a over heating problem on my 670 install.
    New engine from Rotax Rick.
    Everything from Rick is new or re-built.
    Just had installed new thermostat.
    Engine temp go's to 200 degrees at 6200 rps at climb out.
    Have to idle back to 3500 to get the temp back to 180 degrees.
    On the ground using a laser temp gun there seems to be a hot spot around the thermostat.
    EGT doesn't go over 800 degrees.
    If it was timing or jetting the egt's would be higher.
    Timing is spot on according to the A-P mechanic.

    I'm getting fed up with this install.
    It looks like I'll have to buy $1100 radiators.
    Rick has sent some pics of a large radiator that should work.
    Not sure where it would be mounted.

    Any advice would be a help.
    Thx Marv
    • 27 replies
    • 6,450 views


  19. C5Engineer added a post in a topic Airventure 2014   

    Larry just let me know what I need to do. I think this is our best bet at the moment. I am willing to pitch in on food and time.
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  20. Av8r3400 added a post in a topic Airventure 2014   

    Hey Doug - What is your schedule?
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  21. Av8r3400 added a post in a topic Airventure 2014   

    I'm trying to text to Brett to find out what his plan is.  I'd rather not turn this into a pissing contest with him.  He usually did thursday...
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  22. Bandit added a post in a topic Airventure 2014   

    Let's have it Thursday for lunch.
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  23. marksires added a post in a topic Airventure 2014   

    And since you'll have your motorcycle, there is also the option of the restaurants around town.  we usually leave the show around 3:30pm, get a shower, then head for a restaurant for supper, which gets us there before the crowds.  After about 5:30pm, the restaurants are packed, before that, you may have the place to yourself.
    Mark
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  24. Av8r3400 added a post in a topic Airventure 2014   

    There is plenty of (pretty good) food available on the show grounds.  It can get a little expensive, but that's the nature of these types of events.
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  25. birddog486 added a topic in For Sale and wanted, you got it, I want it   

    912 remote oil sender kit
    I have everything thats needed to mount the oil sender to the firewall and away from the vibration of the engine (sending unit not included) the hose is 32"
     
    I'll ship to the con. US for $80
     
    Travis
     

    • 0 replies
    • 440 views