Activity Stream

Activity Stream

  1. Dusty added a post in a topic The unquenchable EGT   

    Stainless pop rivets will sort the old holes
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  2. Turbo added a post in a topic The unquenchable EGT   

    I reckon i'll go visit the local welding wizard tomorrow to get the old holes closed up.  The probes are very close to a numbered drill size, so I can drill the new holes for minimal clearance & leakage.  I have drilled out a few #10 nuts to use as spacers, along with a few ss washers.  Thanks, Vance,, for digging into this issue to such depth.
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  3. NorthIdahoAvidflyer added a post in a topic The unquenchable EGT   

    Those old jholes are not right. Mine was the same. You will notice they are both out near the Y of the pipe. That will produce higher EGT readings.  You are on the right track. 
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  4. Turbo added a post in a topic The unquenchable EGT   

    Measured off the 38mm and yowtza!  That's a big difference!  Does this look right to y'all?  The pencil marks are where the new holes will go.

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  5. skypics added a post in a topic Rotax 582 engine failure. Can you solve the mystery?   

    Good point. Ultralights have high drag and low mass. 
    So if you are climbing at Vx and the engine craps out at 100 feet agl, you have a second to get th nose down to keep flying speed and have enough reserver to flair out.
    You may notice in the video the front seater pulled BACK in the yoke when the engine died and was still puling back on the way down essentually turning the 500 into a lawn dart.
    Practice those engine outs.
    The engine analysis was super professional.
    John M
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  6. Allen Sutphin added a post in a topic Kitfox 1 questions   

    You northern boys evidently are a little tougher than we hillbillies.  Days like that one, I am usually laid up in the recliner with a pot of Maxwell House. Worked out in that stuff for 30+ years and had enough of it. BTW, what engine is on the nose?
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  7. Buckchop added a post in a topic Kitfox 1 questions   

    Well did about an hr and a half worth of flyin and taxi work yesturday. Was a good day 22above but no sun. Still was AWESOME!!!!! My flying buddy Brian (in pic) said the Blackfox 0021 sure b a nice bird and it climbs like hell,  i think she will b a ton of fun. 

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  8. Ronin added a post in a topic Rotax 582 engine failure. Can you solve the mystery?   

    I instructed in a Beaver 550 with a 582 for about 75 hours before the endorsement changes. My rule of thumb was if you didn't dump the nose within a second or two of me pulling the throttle, I would slap the front seaters helmet to wake them up! I would always tell them "things happen fast in an ultralight". The guys transitioning from F-16's and L1011's would always laugh at that until we got up to altitude, banked it over 45 degrees and pulled the throttle to idle. It would usually snap out of the turn in a couple seconds if you didn't release the back pressure. Then they would get it. I would pull the throttle all the time on takeoffs and taught to point it down fast if you want to avoid a crash. Deadstick in the Beaver entailed pointing it almost straight down to maintain 60/65 until you flared, you got one shot at it, maybe, maybe a slight amount of float to help. 
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  9. sky4play added a post in a topic Becoming a rejuvinated bird   

    Ahh....the McKiernan clan.    First of all...Hats off to your Dad. That is quite the Bio... I already feel out-gunned. 
    Welcome… John O'Hearn
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  10. skypics added a post in a topic Rotax 582 engine failure. Can you solve the mystery?   

    I only watched  the 1st segment. 
    I had 1200 hours in a GT400 so I can relate to the flight characteristics. The 500 with a passenger is heavier, of course. I fly an avid MK4 now.
    In this incident it is obvious that there was no flair by either the student or the instructor. Therefore, the unnecessary damage and personal injury.
    So what would be a minor incedent became major.
    All engines can fail and ususlly at the worst time. We practice accuracy engine out (dead stopped) landings every month. And I recommend every pilot practice landings with the engine off. There is a significant difference between ideling and stopped engine glide.
    John M
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  11. Cloud Dancer added a post in a topic Nimbleone2   

    The guy that listed the Kitfox on E-bay pulled the listing. You can still use the link to get to indirectly get you to the  original listing and from there you can use the "contact seller" to send him a message to find out if it's still available.
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  12. Nimbleone2 added a post in a topic Nimbleone2   

    Sorry for delay in response.  Before I get my hope up that it may be the one, IS THE FOX STIL AVAILALBLE? 
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  13. SuberAvid added a post in a topic Behind the power curve   

    It looked like the plane might have been on it's maiden flight.  I think they forgot to put the rest of the engine mount bolts in or something. A lot of other parts should have collapsed before that engine came off.
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  14. NorthIdahoAvidflyer added a post in a topic The unquenchable EGT   

    I’m sure plenty people use longer probes but there is instructions on how to shim them out so the probe tip stays in the center of the pipe and plenty of articles related to proper probe placement in the cone of the flame. When I went to the leading aviation supply store to order probes they did not offer suggested lengths for specific applications. It took reading the Rotax install manual along with Rotax tuning articles from various sources to make the simple conclusion that it comes down to probe type, where it needs to be in the system and how far it needs to be from the skirt of the piston. I always buy direct if it saves me a few dollars and when I went to the Westach site it offered shorter (1/2 inch) probes that the other distributors didn’t. An email to them confirmed this probe would have the proper needed reading for my gauge and application. Plugs still reading good color as before and the gauge now shows a reading that matches what the plugs say.  I’m happy with my outcome. To each their own. 

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  15. nlappos added a post in a topic Tail Leaf Spring Maule Tailwheel   

    contact Al at Wasau Spring, he will make whatever you want, and his customer service is first class:,  (715) 845-6335 
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  16. 1avidflyer added a post in a topic Becoming a rejuvinated bird   

    I'm staying down in Gulf Shores for a while this winter, but I see Melbourne is quite a ways away.  As far as a new tail spring, the Avid MK IV uses a 1 1/2" wide tailspring that is necked down to 1 1/4" where it meets the tailwheel.  Some Maule tailwheels are set up for 1 1/4" wide springs, and some are 1 1/2".  Matco tailwheel springs can use either width.  You wouldn't have to neck the spring down to 1 1/4" if you have a tailwheel that will fit the 1 1/2" spring.  You can maybe find a spring shop to cut and bend you one locally, if you know the length and angel it needs to be bent at.  I've made up my own springs at times.  Not that hard to do if you have a press to cold bend the spring and a good drill press to drill the holes.  If you go with 2 or 3 leaves of springs, you will have to drill a second hole further back to go through the spring leaves and bottom plate in the plane the spring goes up against.  Originally, Avid only used one leaf spring, and the channel it sits in is deep enough to keep it from swinging sideways with only one bolt holding it on.  Not enough if you go with more leaves though, and that's why you will need the second bolt.  Maybe this picture will help if my words are hard to understand.  JImChuk

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  17. C5Engineer added a post in a topic Becoming a rejuvinated bird   

    Wow that is quite the intro. Glad you were not hurt and the plane is being saved. Ditch the Maule Tailwheel and go with a Matco. Mark at Avid Aircraft has several options of double Tailwheel springs that you can upgrade to. You can also get parts from Stace Shrader of Rocky Mountain Aircraft in Idaho.
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  18. 1avidflyer added a post in a topic The unquenchable EGT   

    I think most people running Rotax 2 strokes use the longer EGT probes.  The 1/2" ones are usually used on the 912 or Jabiru as both have smaller diameter exhaust pipes.  Here is a link to Westach's EGT probe page.  JImChuk
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  19. mack55 added a topic in Introduce yourself   

    Becoming a rejuvinated bird
    Hi Everyone,
    My name is Patrick McKiernan. Im a young engineer located in Melbourne Florida. I started flying an Avid MKIV (EA81) around the age of 9 years old. My father owned one and we eventually converted it from a taildragger to a float plane. Hurricane Ivan came along and beat the ol girl up pretty bad in the Pensacola FL area. When I was in high school I ended up restoring the airplane, and then my father and I built an RV-7. My dad still has that old Avid and not too long ago we stumbled upon another MK IV with a 582 tricycle gear and speedwing. The plane had sat for a long time but everything had been gone through. I put almost 20 hours on her in about 6 weeks trailering her to the local airport. She flew great but definitely sinks like a brick compared to the Heavy Hauler wing. Long story short I had taken a friend of mine to breakfast about an hour away. Plane was running great. On our return home we flew another hour and went out over the beach to do some sight seeing before we headed home. At this time we were flying at 1200' agl and the engine all of a sudden stopped producing power.... It finally quit and I was able to get it restarted with the fuel pump and primer but it still wouldn't produce any power. At this time we were at about 500' agl and decided that the road was our best option to avoid people on the beach. I shot a gap in the traffic but then the power lines started to fill the windshield. At this time we made an aggressive manuever to dive under the wires and try to flare before we hit. We had quite an aggressive sink rate, but we hit with a positive attitude. We blew the tires and bungees making it a very graceful landing and skidded for about 400'. No one was hurt, no cars were damaged, and the airplane was in pretty good shape besides the totaled gear (which I had been planning on converting to a taildragger anyway). Long story short there was enough damage to the bottom fabric that I decided to recover. Currently I have the whole fuselage completely stripped. Im about to weld some gussets in for the carry thru tubes on the rear spar and where the bungies wrap for the main gear. I will be sending the engine out to Rotax Rick in the next week or two for a diagnosis and overhaul. I am still looking for a tail leaf spring for a maule tailwheel and I will need a new Prop. Basically the old girl will be brand new when she is done. Wing fabric was in good shape but I may give her a single coat to match.
    Thanks for the add, Looking forward to seeing what everyone is up to.
    Patrick McKiernan
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  20. mack55 added a topic in For Sale and wanted, you got it, I want it   

    Tail Leaf Spring Maule Tailwheel
    Does anyone have an extra leaf spring they are willing to sell? I just bought a Maule Tailwheel.
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  21. mack55 added a topic in For Sale and wanted, you got it, I want it   

    ISO new Prop
    Looking for preferably a warpdrive 3 blade and hub for an avid mk iv with a 582 C gear box. Nickel Plating is a must. 
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  22. mack55 added a post in a topic Avid MK IV Parts for Sale   

    Do you have the tail leaf spring for the maule tailwheel. Im converting to a tailwheel. Already have the main gear and a maule tailwheel.
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  23. zadwit added a post in a topic Aerolux prop and improved brakes   

    Currently running a WD 3 blade 68" sq. tip, set 13 degree= 6250 RPM static at 30(f) 2500 MSL.
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  24. zadwit added a post in a topic Aerolux prop and improved brakes   

    I figure the only time I will have too much heat is when Im on fire!!
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  25. NorthIdahoAvidflyer added a post in a topic The unquenchable EGT   

    Here are some thoughts and ideas. If you look around (believe it was the Avid building manual) there are directions on installing the longer probes. They call for 7 AN3 washers to be placed on the probe to shim it out. I would not worry about the probe cooling because  the washers are in direct contact with the pipe and should insulate the exposed portion of the probe. 
    I was going to shim mine out but I had cut the excess tail off of the clamp when I first installed them (big weight savings) . Once the washers were installed the clamp was to short. I got on the Westach web site and found that they make the same series of probe with a half inch long probe. I ordered new probes and they work perfect. 
    If I had to do this all again I would replace the Westach with a Micro 1000 from Aircraft Spruce. I have ran them before on other planes. They work great and self adjust for ambient temperature so the probes read correctly all the time. I was on a budget at the time and figured new probes for the Westach were cheaper than a whole new gauge. After it was all said and done I ended up spending money for two sets of probes and didn’t save much money over a new gauge.
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