Not Quite Oomph!!!
30.03.11: Sam and I conducted another bathroom scales test at the weekend and amazingly and also annoyingly only achieved around 35kg thrust??? I’m not sure how accurate this method is but the carb jetting is much better/richer now than the last recent scales test when we got around 38-40kg thrust (see previous video). I can only speculate that is type of testing is quite flawed……… Well that’s what I’m hoping any way.
So to try and get some accurate information regarding the prop’s performance I’ve pestered Xoar again for some technical data for the 36x10PJD-P prop. When I asked them for the data a good year or so ago they didn’t have any. Thankfully they now have the relevant information and Rebecca from Xoar emailed me the PJD-P 36×10 data yesterday. (I also have the ‘old’ PJD-P 34×10 available too for those of you who may require it)
Unfortunately, when I checked the data, the 4900rpm I achieved in the garage a week or two ago doesn’t equate to the 45kg thrust I was expecting with my own calculations. It is more like a meagre 42kg thrust instead. I need to achieve 14.5hp/5000rpm in order to get the 45kg (44.7kg according to data) performance I’m wanting, the 4900rpm we got only equates to 13.5hp.
I’ve ordered a Pulstar pulse plug to try and achieve improved combustion and may be squeeze an extra fraction of thrust.
I will update soon…..