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   Post on Avid MK4 braking effect in Avid Model IV

   By skypics, posted 5 Nov 2018

   My 1st Avid was a model B. I flew it for over 2,000 hours until I totaled it on a challenging back country Sierra strip. It had single MATCO pucks on each wheel that were never very good braking. I even modified to standard poor geometry brake pedals so to give the proper leverage on the brake cylinder. 
   On my MK 4 I actually made the MATCO modification to add 2 pucks on each wheel. The brake pedals have good geometry. Still the braking is not great. I have 1700 hours on this Avid.
   A friend bough a MK 4 nose-dragger and when I flew it I was surprised at how well the brakes worked. His set up was like mine using the remote reservour. And he only had single pucks.
   Recently I found the brake pucks starting to leak so I bought new O rings, new filler nipples and the newer slide spacers that are stainless and so should not corrode restrictingh the ablility of the pads to slide on the spacer/slides. 
   I'll check them out on today's flight, but I don't hold out much hope that they are adequate.
   I should mention that I had a damaging accident 2 monthes ago when I landed in my tail-dragger MK4. I put on the brakes to slow down and then let off. One of the right brakes stuck in the on position causing a ground loop that put me up on the nose and left wing tip. This damaged the outboard flaperon hangar and busted on of the blades on the Whirlwind composite prop. Fortunately no damage to the crank from prop strike.
   Make sure the brake pad slides are clean. 
    
   John M