The entire community runs off the knowledge of others, recommending things for each other, building things for each other, coding things for each other. As I am trying to get some code together for later release it came to me that the maths I'd been using to help an RC Groups thread would be spot on for us. I of course posted it but changing it regularly (thanks to new model planes being released) has meant the file has to be uploaded continually to the thread so here is its own blog post. I actually posted an older one on my first blog but as I've altered it somewhat.
The file is nothing special in itself it just collates information and shows the viability of an airframe mathematically (not physically). The maths evaluates the attributes of an airframe to a few existing experiences (the first 10) on how difficult they were to fly this gives values on the beginner safe planes (wing loading). Again advice dictated to motor recommendations, 90w/lb is a base touted value for flight, 100w/lb is claimed to be perfect for gentle flight maneuvers. Spare mass is the mass you can add without the airframe going over the specified beginner "safe" values. The Additions part is to calculate the size of motor once you start adding stuff thats why a battery is first :)
Its certainly not definitive and its certainly not a bible but it should help the first timers or modders looking for a new toy. Just because the maths comes out fine it doesn't mean the plane will. As we have seen some planes are good EasyStar clones with similar specs but space inside them is 40% less thanks to giant walls. Research is your friend I just hope this does a little research for you. Values for the additions are in row 3 so make it bigger and change them if you want (APM is just the basic APM setup - APM + oilpan + MTK).
Feel free to post specs for planes that you want or like.
Data required: Name, Wingspan, Wing Area, Flying Mass
Name: Northrup GlobalHawk
Wing Area: 169sqft