here is a pic of the Antelco rotor spray chart. At 15 psi you get 0-22 feet diameter with a maximum water flow of 22 gallons/hour. Note that the diameter is rated at .65 ft. above ground, which is using the short stakes connected to tubings with an adaper fitting plugged in to the tubing. This means 4 parts, adapter, small tubing, stake and rotorsprayer.
If you get a clog there are multiple places to disassemble. The way I installed, there are 3 parts, riser, rotor, wire stake. I get clogs at the rotor and less commonly where the riser plugs into tubing. If I find a clog I unscrew the rotor. Usually it has an ant or debris and can be poked clear. I carry a 2 ft length of small diameter wire which can unclog the rotor and, if needed, just insert down the straight riser to the plug-in point to unclog, it is a striaght shot down with no further assembly. When you introduce the small flex tubing and stake there are several other points to clog and disassemble.