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Permalink Reply by A Heaton on February 9, 2012 at 8:48am

If you can get a hold of "Airplane Design Part I - Preliminary Sizing of Airplanes" by Roskam there is an equation in there which you could use to get the empty weight form the take-off weight, if you get some regression coefficients from existing UAVs with similar empty, take-off and payload weights, endurance, speed.

Not sure on the battery sizing though, but looking again at similar UAVs might give you an idea of it.

I’m not going to post the equations here (due to IP rights), but the book is cheap enough and I know there are copies of it floating about on the internet – but I’ll leave the moral choice of if you want to buy it up to you.

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