I’m still working on getting the 400mm V-tail airborne. I had to take a little hiatus. And if anyone is reading this that is as inexperienced as I am, when you are told to put your charging lipo battery into an explosion proof bag or something else to protect it, listen to them. I blew up a 4S 6500Mah battery in my basement. It was fortunately in the bag. It was a violent explosion and while the bag helped contain it, there was still a little burning lithium that made it to my workbench and caught it on fire. And the heat was intense enough that it burned a guitar amp that was nearby. It filled my house with smoke and soot and left a permanent black mark on my basement floor. Nothing left of the bag. Fortunately I keep a fire extinguisher next to my bench rated for chemical and electrical fires. It worked. I was outside when it started too so I left the area to boot. There were cans of flammable liquids in the area…if that burning chunk of lithium landed there that would have been all she wrote for the house.
I lost my charger (which I should have heeded the warning it gave me) and a bunch of other stuff. The wife all but banned me from the hobby. I made a deal with her that I would raise money for replacement parts by selling stuff on ebay. It took a while but now I’m back to the v-tail project. I also have a great charger, I double bag charging batteries, charge in flame proof areas with lots of ventilation. I also added heat sensors that plug into my charger. And I’ve gotten OCD about going to check on the batteries before I go to bed or leave the house…Burning lithium is nothing to mess with…pour water on it and you make hydrogen so unless you want to know what it was like on the Hindenburg don’t do that. I was able to pick up the battery with a long stick and put it in a bucket where I took it outside and just let it burn out. The fire extinguisher only worked on the areas that caught on fire. I think it might have slowed the battery down but I’m not sure.
BACK TO THE QUESTION: I’ve been playing around with eCalc running different combinations of motors and other parts. I’ve also done a lot of reading. I’ve plugged a lot of motors into eCalc rated for 4s and ran it at 6s. As long as I use the right prop and other parts and keep the wattage under the maximum it runs fine in the simulation. I have also noted that some motors it seems fine to run at higher voltage and others it doesn’t. If I plug a Tiger MT2814 770kv (rated at 4s) I get no errors or warnings in eCalc with a 6S battery as longs as the power is under the rating. The same motor in another brand with the same specs I get a high voltage warning.
What I want to know is does the voltage of the battery matter as long as you keep the maximum power within the range of the motor? I have to imagine there are limits.
I’m asking because I have a QAV 500 and only three Tiger MT2814 motors. I have a couple of really nice 6S batteries. So I’ll have to either buy a new tiger motor and some 4S batteries, buy a new quad of motors that is rated at 6s, or get a new tiger motor and run it at 6s staying within the power range.
