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Everything posted by nlappos

  1. nlappos added a post in a topic Checking out an Avid   

    A big factor is the useful load, which is of course the difference between the empty weight and the max gross weight. Many car engine Avids have very high empty weight, which limits the useful load. For a typical C model with a 2 stroke Rotax 582,  the useful load might be about 450 to 480 lbs, for a Mark 4 it might be around 580 to 600 lbs. That means two 180 pounders and lots of gas is permitted. There are some auto engined Avids with 350 lbs useful load or even less, which makes it practically a one person airplane..
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  2. nlappos added a post in a topic Cowl/muffler interference   

    My Mk4/582 does exactly  that. There was enough flexure in the whole the muffler assembly that I could pull it straight aft about 1/2” with a few wraps of safety wire from the bottom of the circular  muffler bracket (shown in your photo ) to a screw I put in the bottom of the firewall. 
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  3. nlappos added a post in a topic Pre-buy inspection in Grey Eagle, MN   

    Always ask the empty weight and Max Gross weight (they are neither standard and are the best single measure of the payload that you end up with). A good Mark IV will weigh perhaps 560 lbs empty, and the max gross should be 1150 for a true MK IV, so you get almost 600 lbs of useful load. The serial number of a Mark IV should end in a D (mine S/N is 1172D)
    Also, ask about the fuel tanks, older birds cant take ethanol mix, and the tanks dissolve and leak. They are a pain to change out, but nearly everyone has done so. Ask if these are the original tanks.
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  4. nlappos added a topic in Close Call's and dumb stunts   

    Bad Landing, Failed Landing Gear, Missed Inspection?
    Well, I was ham-fisted enough on a landing in Oklahoma to fail a weld on the gear. The landing was not one of my best shots, but also not a whopper. I was surprised when the gear folded outward during the roll out about a second after touchdown. My Avid is a tough little bird, so the wing is straight and true (but the tip is scraped) and the fuselage is straight, especially the seat frame and side members that attach the gear. Prop hit the turf and split, as you can see. Just as a safety check, I am sending the engine in for overhaul, and debating now whether to reweld the gear or go to a Grove set.
    But please Avid folks note the weld on the gear cross member. That looks like a cold weld (factory fitting I am told) and the paint in the weldment says I didn't inspect hard enough on my annual or I might have seen it. It might be good to strip and inspect that area, and maybe even put a gusset in that corner so the weld isn't under tension.
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  5. nlappos added a post in a topic lights   

    I bought this 25W spot (10 degree beam) that throw a very intense beam and has 2500 lumens, too lazy to install yet, but took it out at night and it will clearly work as a landing light:
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  6. nlappos added a post in a topic Wanted: MATCO 8" Tail Wheel   

    The Tail wheel steering arms that come with the Matco 8" pneumatic TW are 45 degree arms that wont release the wheel within the normal rudder range, there are modified arms that release at 25 degrees: The wheel is $255 from Matco, new, and the extra arms are about $20 I think. I put this wheel on a year ago and it is great, especially as compared to the Maul 6" hockey puck it replaced.

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  7. nlappos added a post in a topic Fuel sight tube pics anyone?   

    I bought two 1/8 NPT brass barbed nipples, and cut a few of the barbs off to shorten them, drilled a 3/8" hole in the top and bottom of the tank, and used permatex fuel tank epoxy to butter the threads and then screwed the nipples in. When set, I added the 1/4" tubing and some clamps, and had a nice gas gauge.  And yes, I chewed through the fabric with my teeth, or at least it looks that way!
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  8. nlappos added a post in a topic VG's for AVID Flyer   

    Is there any effect on top end speed with the VGs?
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  9. nlappos added a post in a topic Help with Fuel lines, filter, gascolator please   

    Here is an AD that is still in effect that recommends the filter above the header tank.

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  10. nlappos added a post in a topic Throttle cable supplier or make my own   

    Fred Stork put a throttle like that on his left side, at the seat frame. Looks great and he loves it.
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  11. nlappos added a post in a topic rubber hose   

    I found some nice silicon high temp high pressure hose on Amazon, worked well.
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  12. nlappos added a post in a topic Carb ice on a Stratus Soob with Bing carbs   

    The cooling that makes the ice comes from the evaporating gasoline and the venturi effect of the carb where the extra speed of the air drops its pressure and therefore its temperature (like a spray can does), so Jim's chart is dead on. BUT, the whole bulk of literature on carb ice comes from really light, air cooled aviation engines with carbs hung in space away from the block. If you have a car engine, the carb might very well be bolted closely to the block, and getting lots of heat from it. That's because the emissions of a car are dropped when the air is warmer and the gas evaporates completely. Cars don't care for a few percent power loss compared to a nice emissions improvement.. Also, the air intake on a car engine arrangement might warm the input air as SuperAvid describes.
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  13. nlappos added a post in a topic Uncoordinated Stall   

    Each new plateau of risk, when first attained, seems to be the last; but, as we grow accustomed to it, a new horizon beckons. What insulates us from fear as we approach the danger is simply habit, the familiarity of a point we have reached and all the points we’ve left behind. Until one steps too far, it’s often hard to tell the difference between recklessness and skill
                            - US Army Flight Fax 1996
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  14. nlappos added a post in a topic PRIVATE FORUM - Think Again!   

    Yep, name calling is the right way to prove your point! Any time you want to match credentials, let me know.
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  15. nlappos added a post in a topic Where to buy split oilite bronze bushings   


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  16. nlappos added a post in a topic YAMAHA Genesis (RX-1) install in Kitfox 5   

    Harbor Freight has two tables like this that jack up[ 500 to 1000 lbs about 3 feet, might that help mount that engine?

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  17. nlappos added a post in a topic Cowling Camlocks and Static Ports   

    Av8r is right on. Finding a nice static port location is a pain in the neck, and would take a small test program with a lot of holes to find a good spot, and likely a pair of spots that cancel their errors in small sideslips.
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  18. nlappos added a post in a topic Ruff Rotax 912   

    chopndrag, my 582 is rough below 2000, and I think it's the C gearbox that has a resonant range.
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  19. nlappos added a post in a topic PRIVATE FORUM - Think Again!   

    Still the same method. But not to republicans
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  20. nlappos added a post in a topic PRIVATE FORUM - Think Again!   

    Ask the folks treading water right now, bet they can help you.
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  21. nlappos added a post in a topic Mounting Aero Classic Tundras   

    The Matco site recommends squeezing the tire nearly flat, with the tube inside, using large clamps. Then slip half the wheel on, set the tube's inflation tube in place, then slip the other wheel half onto it. Big trick is not pinching the tube. As EDMO says, lube helps. Here is the Matco service bulletin (, I used it on smaller tires and it helped a lot. Not sure about bigger tires, though!
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  22. nlappos added a topic in Avidfoxflyers General Hangar   

    Big Problem with My Avid MK IV
    Every time I fly, it seems I get this big grin and I can't seem to get rid of it. Any ideas?
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  23. nlappos added a post in a topic Extended Speed Wing with short flaperon location   

    The roll control is a factor of both the difference in wing lift created by the flaperons, and the distance from the CG of the aircraft that the lift is applied. Even without much washout, the inboard flapewrons will generate only 1/3 to 1/2 the control capability of the same length of flaperon put on the outboard section of the wing. It is basically a leverage thing.
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  24. nlappos added a post in a topic Hunting with your Avid/KF series   

    Can you strap the animal to your hood, like on a chevvy?
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  25. nlappos added a post in a topic Gun Case on Strut   

    Webster's Dictionary says "a collection of weapons":
    Definition of arsenal
    1a :  an establishment for the manufacture or storage of arms and military equipment The city is home to a federal arsenal.
    b :  a collection of weapons
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