I bought the cheapest HF pressure washer. The nozzle is a straight jet
(which is plenty powerful for what I need) and to get a fan spray you
twist the end of the wand and two plates come together and pinch the
stream into a fan. The fan spray seems disproportionately underpowered.
I'd like to turn a fixed narrow nozzle for it in the hopes of preserving
more power with a wider footprint.

Any suggestions on what the shape should be?

--
Ben Jackson

http://www.ben.com/