skypics

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About skypics

  • Rank
    Advanced Member
  • Birthday 08/08/1937

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  • Gender Not Telling
  • Interests Guitar, Piano, Ukulele, Harmonica, my two Maltese dogs, Flying backcountry strips in my Avid MK4

skypics's Activity

  1. skypics added a topic in Technical tasks   

    Seat Heater
    It doesn't get very cold here in SoCal, but recently at altitude, I'm seeing as low as 30 F at 9,000 MSL so I dug out my seat heater. 
    I just plug it in the cigarette lighter socket and put it on low and it keeps my back and butt toasty.
    I think I bought it from McMaster Car many moons ago, but I'm sure Amazon must offer them by now.
    I didn't want to go to the trouble of installing a heat muff on the exhaust and all the that involves. 
    So this works for me.
     
    John M
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    • 7 views
  2. skypics added a topic in Technical tasks   

    Seat Heater
    It doesn't get very cold here in SoCal, but recently at altitude, I'm seeing as low as 30 F at 9,000 MSL so I dug out my seat heater. 
    I just plug it in the cigarette lighter socket and put it on low and it keeps my back and butt toasty.
    I think I bought it from McMaster Car many moons ago, but I'm sure Amazon must offer them by now.
    I didn't want to go to the trouble of installing a heat muff on the exhaust and all the that involves. 
    So this works for me.
     
    John M
    • 0 replies
    • 10 views
  3. skypics added a post in a topic MATCO Tail wheel shimmy   

    There are enough opinions to go around on tail wheel shimmy.
    MATCO sent me a couple bellville washers to put under the top nut.
    John M
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  4. skypics added a post in a topic MATCO Tail wheel shimmy   

    I fought the same issue with my MATCO single fork tail wheel.
    I found that the shimmy was worse with a passenger in my MK 4 Avid. This is because the tail wheel spring would flatten more with the weight throwing off the geometry.
    I found that the tail wheel had worn parts. Namely the triangle shaped part that the "wings" rest on when in the steering mode was worn so the tail wheel broke into swivel too early. Also MATCO sent me those washer that are bent...can't remeber the name...to put under the top nut. And finally I ran my rudder springs tighter.
    I am seeking a shop that can rebend my tail wheel spring back to the original shape, but am not haveing an shimmy issues.
    John M
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  5. skypics added a post in a topic My idle thoughts on 582 cooling system   

    FWIW here is my feedback on belly mounts vs cheek mounts.
    I currently fly a MK4 with a Jabiru 2200 so no water issues, but prior to the MK4 I flew a model B that came with a side mounted cooler that neve quite made the grade so I installed a belly mount in series with the side mount which cooled properly. Here's what you need to consider...
    Usually the belly mount is mounted somewhere between the main gear or maybe even a bit forward. 
    You will have to deal with the fact that the hot air from the muffler goes directly back to the belly radiator and so does not cool as well as it could.
    What I did to solve this issue was to mount the belly radiator 2 inches below the fulelage and then fabricated a sheet of aluminum that directed the heat from the muffler up over the cooler.
    A year back a friend bought a MK4 nose dragger with a belly mount encased in a plenum like a P51. We could never get the heat down to an acceptable level and then I remembered the issue with heat from the muffler. Fortunately another friend had removed his 582 and installed a Jabiru 2200 so he had two cheek radiators for sale. 
    We removed the belly mount and installed the cheek cooler.Problem solved along with drag reduction which gave us an extra 2-3 MPH cruise.
    The belly mount will need more coolant (weight) due to the extra length of the hoses.
    Stay with the cheek mount for a simpler solution.
    John M
     
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  6. skypics added a post in a topic Little Progress   

    Now might be a good time to figure out how to get more foot room on the pedals. That lower crossbar on the firewall frame will interfere with how much of your foot can fit on the brake pedal.
    I wear a size 9 and I can oly get my tip toes on the top of the brake pedal. If I could get the ball of my foot up om the top of the pedal  I could get better braking.
    Also it is possible to get ypur toe between the top of the brake pedal and that cross bar. 
    Avid MK4 
    John M
     
    • 1
  7. skypics added a post in a topic Another Forced Landing - Mine   

    Possible vapor lock???
    I had over 2400 hours behind a grey head 582. No issues.
    I drive a Jabiru 2200 now and like the simplicity.
    It weighs the same as the 582 I removed from my Avid when changing to the 4 stroke.
    John M
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  8. skypics added a post in a topic MY AVID Mk4 RX-1...build   

    How heavy is that engine full up ready to fly?
    John M
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  9. skypics added a post in a topic F7 part for differential ailerons on Avids   

    So how do we order the F7 bellcranks?
     
    John M
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  10. skypics added a post in a topic "The Raven" a kitfox avid clone!!!!!   

    You can install a Subaru but it is very heavy. A friend had on on his MK4. He had to add weight back in front of his tail wheel to keep her from being very nose heavy.
    It performed well and the engine was much cheaper than the usual engines used.
    John M
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  11. skypics added a post in a topic Rotax 582 engine failure. Can you solve the mystery?   

    Ronin:
    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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  12. 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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  13. skypics added a post in a topic What oil for rotary valve?   

    Dan:
     
    Use the same oil as used in the fuel and make sure you have no air in the rotary reservoir a nd associated lines.
    It's been a while since I drove a 582, but I seem to remember the Rotax manual describing how to fill the rotry valve reservour to prevent air in the lines.
    John M
     
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  14. skypics added a topic in Avid Model IV   

    Better aileron response
    Have you ever had a larger person sitting in the passenger seat and during landing or takeoff found you needed to input rapid and large airleron displacement to compensate for wind gusts?
    I have whe I flew a young lady with what we might call "thunder thighs."
    The stick slapped against her and I barely had enough deflection to keep the wing tip from touching the ground.
    This was on my model B. So I found that I could reverse the bell crank at the place where the aileron push rod connects to the mixer.
    So I have finally made this same mod on my MK4. 
    At cruise it takes a bit more force to move the ailerons, but you really don't have to deflect them much at cruise. It's diring low and slow that the augmented deflection came in handy.
    During my testing today I also founf the if I deployed just a bit of flaps two things happened.
    The aileron pressures were greatly reduced and the roll rate was awsome. Secondly the TAS increased about 3 MPH with that little bit of flap deployed. I found after landing that the previous owner had a bit of reflex in the flaps which while it can benefit with extra cruise on aircraft with normal flaps, it actually makes aileron movement harder.
    After landing I adjusted the mixer to add 3 degees down in the clean position.
     
    I took photos showing before and after. You will notice that one arm is longer thn the other so with the short one now connected to the aileron push rod a small movement makes a larger one at the mixer.
    John M
     
     
     


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  15. skypics added a topic in Avid Model IV   

    Replacement of Jesus Bolts on Fuselage Wing Strut
    I share a hangar with someone and so I fold my wings backa after every flight. I fly at least three times per week.
    I am starting to wonder how much the flold backs are stressing the strut bolt at the fuselage. 
    Has anyone with MK4s ever removed and inspected these bolts? If so what stress have you seen?
    John M
    • 2 replies
    • 112 views