Online Community of Zenith Builders and Flyers
You can check to see if there is air in the system by bleeding the brakes. You can also check to see if the master cylinders are holding pressure. Its probley not the master cylinders because sound like both would have to fail at the same time. however if you have contaminated fluid then both masters failing at the same would be more likely. Probley just a simple bleeding of the brakes and you will have it fixed. If you have not opened the bleeders on the calipers or (cracked) any brake lines, then you have air entering the system somewhere. You would want to look into this also. Or just do like the space shuttle and toss out a parachute to slow down. Good luck
Check the calipers to make sure they are clearing the landing gear.
know air ,know rubbing , maybe i will just carry a pick and throw it out when i land its not a real big worry they stop in a couple hundred meters (yards )
If you have Matco brakes, you may need this kit.... http://www.matcomfg.com/MASTERCYLINDERINTENSIFIERKIT-idv-3282-46.html
Some versions of Matco brakes combined with some versions of Matco master cylinders make for very weak brakes. So bad that Matco came up with this kit, which radically increases the amount of hydraulic pressure the master cylinder produces, which increases the clamping pressure of the brakes, which increases brake effectiveness.
Might be right for you, might not. If you have Matco brakes, maybe you should call them with your part numbers and see if you are in the effected brake and master cylinder combinations. For that matter, if you have another brand of brake, you might want to check with the manufacturer of your brakes about your problem. They may have a solution.
Set up one of my brakes on a wheel today just out of interest I noticed my torque plates protrude out past the disc on mine too, that just the way they are I guess. I think that they might loose effectiveness when pads are right at minimum because of this but definitely not with the amount of beef left on your pads. Do they hold up doing a full power run, that is normally the best indication on wether there is a problem or not although I don't know how well that would work on grass though. The only other thing I can suggest is flex or stretch in the brake lines unlikely that plastic stuff would though I reckon but I have seen it on old crusty ones before though. Also probably stating the obvious but check the angle the masters are mounted at coz that can make a big difference. Good luck