I have created and published an Android app called RC Calculators. The Web site is at [link=http://rccalculators.com/Home.aspx]RC Calculators[/link]. The app is on Google Play and more details are [link=http://play.google.com/store/apps/details?id=com.donstegall.rccalculator]here[/link]. It is also on the Amazon Appstore and you can use the app like it is on a phone using TEST DRIVE NOW on the [link=http://www.amazon.com/gp/product/B008ZEI7TE/ref=mas_pm_rc_calculators]RC Calculators[/link] page.

I will be releasing a new version this weekend with a battery voltage calculator for LiPo, LiFe, NiMH, and NiCd batteries.

I'm working on a CG and a MAC calculator. The CG calculator is wing planform based and I'm wondering if I should add horizontal tail area and moment measurements to it. I have an article that appeared in a NMPRA book in the 70's that goes into detail on CG calculation. It is fairly comprehensive. What I'm wondering is if for a "ballpark" app like this is if getting into that detail is needed.

I plan to add a lot more calculators to RC Calculators and I welcome input and ideas from all. I want to cover aerodynamics as well as electrical and mechanical calculations.

I recently added a drill size chart. I had been given the idea of adding a prop chart and one day I needed a drill chart. So I added the drill chart. I broke out the drill charts into a FREE app [link=http://play.google.com/store/apps/details?id=com.donstegall.drill*****art]here[/link] on Google Play, and [link=http://www.amazon.com/Don-Stegall-Drill-Bit-Charts/dp/B009NIELEQ]here[/link] on Amazon Appstore. Like RC Calculators, you can try it on Amazon using TEST DRIVE NOW.

I'm working on desktop browser based versions of the calculators.