ORIGINAL: jimmkeeh
I am not even close to flying mine, but I learned a few things that some of you may find helpful.
First, forget about my last posting on the Robart fill valve. It seems that you cannot use it like a regular tire filler. The needle valve must be "seated" deep into the tube. You have to use the adapter and the small air line to fill the system. A friend of mine showed me how to modify a 12 volt tire compressor to work. This has to be much easier than using the Robart hand pump.
Second, is the Robart tail wheel retract mechanism. I was having problems with retracting the gear. The weight of the plane pushed the wire gear up. This interfered with the lever/toggle system of the retract. I solved this by grinding another flat spot on the wire and putting a small wheel collar under the mechanism.
Am I the only one having these problems?
Jim K.
I found I needed to put the retract valve servo and the tail wheel mech servo on different channels and mix them. There isn't much "fudge" room on the travel of both the valve and the tail wheel mech. You need to be fairly accurate to get secure locking in the extended ( down) position. you don't want to use the servo as the lock just as a means of getting there. When getting the tail wheel mech in the retracted position (up) it isn't as critical. You just need to get enough travel so the wheel clears past the doors. The servo is strong enough here. Oh yes... make sure you use a strong servo of 100oz as the manual states