I find all the throttle blipping in that well known Wanaka camel vid a bit odd. Is the pilot putting on a show for the crowd? blipping with the throttle wide open? Why does he need to blip when he's in formation with the Spit? surely just full throttle would be what's needed.
From what I've read at the Aerodrome and other sites the camel had a variable ignition selector like the NP28 we have in game. In tandem with that the mixture could be adjusted to get a degree of fine control at each of the pre set ignition stops.
In the Wanaka vid the whole thing looks very aggressive, I can't find another vid with a rotary aircraft being flown quite that way. Anyone really know about this, like most I'm just an armchair observer