Stef, I don't know of any KRs that use a parking brake, so you may not get an answer here. Most of us just hold the brakes with our feet during run up.
On other planes with in line hydraulic lock type parking brakes, they can be an issue with both bleeding off pressure, and sticking, although generally speaking once the valve is open, it shouldn't retain any pressure. Other possible issues can be an air lock in the brake reservoir if there is a venting issue since the fluid has to expand as it heats up. I have also seen the brakes hydraulically lock as they heated up when serviced with ATF (Automatic Transmission Fluid) rather than 5606 Hydraulic fluid. In that instance I drained the ATF out of the system and serviced with 5606 hydraulic to fix the problem. So the type of fluid in use is also important to proper function of the master cylinders. -Jeff Scott > Subject: KR> taxi testing > > Hi my Friends, > > Yesterday we moved our plane to the airport. This was already a beautiful > moment. But also a bit stress full. Wil it all be oke on the trailer. WE > arived safe at the airport. Installed the wings, checked everyting. Did a > runup test so I could starting with the first taxi test. > > I selected the parkinbrake before the engine runup test, everything was oke, > my dad jumped in. Released the parking brakes and start rooling. > > I needed a lot of power to get from the stand, the plane want to the left so > corrected with the RH brake. Strange and very difficult to stear my KR2, but > I thought I need to learn so I continued. After a few 100 meters it was to > hard to keep her on the track and decited to stop. LH brake was stuck.... > > I was tired from the hole day so we pulled our plane back to the hangar > ...tahs a long walk with a braking plane. > > Did a Qick scan wat probably can be wrong. > > Whit a screwdriver I couldnt get the brake pads from the disk. So I think the > problem is in the parking brake, because we did at home a good test work (my > dad inside hits on my command the brake pedals and me pulling the plane) and > that works very good. > > After some resurge I heard from a guy to release at the wheel side some brake > flued, than the parking brake valve wil come free and the problem can > probably solved. He told me never use the parking brake with a lot of force. > With the testrun he never used the parking brake and has never have this isue > anymore. > > Some of you have the same problems? > > We have the matco system. > > In 2 days I can go to the plane so I can start investigation to my problem. > > I have tryed to ad a picture with it. > > > Stef > > > > Steph and his dad are building the KR-2S see > http://www.masttotaalconcept.nl/kr2 > http://www.masttotaalconcept.nl/kr2_______________________________________________ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
