For this plane, I used 2 motors that would provide roughly 860g of thrust with a 10x4.7 propeller (1720g total) and draw about 12Amps each.(Info/ Recommended propeller found on motor manufacturers website). Using this equation,(Flight Time(min)=Battery Capacity(Ah)/Motor Amp Draw(Amperes...
But, just throwing that information into a power calculator, a 3S battery is going to spin that motor at about 15k RPM theoretically, +/- some efficiency. That comes out to over 500W. If you put in voltage of a 2S pack (10k RPM) it's more like 150W. My guess is that you have ...
The final motor setup is a trade off between efficiency and battery size. I highly recommend using a motor calculator to find the performance of the motor prior to buying it. Ecalc is a easy to use subscription web app that contains many motors and propellers and allows you to essentially ...
We can now add these known figures into Thrust Calculator. By the fact that you can verify thrust it becomes possible, to estimate the general power of the airplane in advance. This will give you more knowledge about your plane and the power characteristics to make your first flight less ...
Now add in a calc program and some motor constants and try the same thing. You begin to really want those constants after that. I was ready to just stop because the Zagi 400 was my only successful electric plane out of six I had tried. Then I bought Electricalc, ran some numbers, ...
However, that is merely an illusion that lasts until you slow the plane down. Why? At 63mm, the elevator must be in an up position to maintain level flight. You must be flying fast enough that the elevator exerts enough force to hold that nose level. So what happens when you slow ...
If you put the same battery voltage into both, and use the correct motor efficiency in WebOCalc, the results from both calculator programs agree within a few percent for all the combos I tried. May 10, 2008, 07:22 PM #13 glen Registered User Morning. We tested his plane a...
The plane can do it, what about the pilot? We have flown our polari at a windy club day when all the nitro models were not willing to fly. Took the Polaris home in the boot, not a bag . It was good to prove a point, kind of fun, but would not do it again unless I could ...
If you look some posts above, you will find another flying wing I´ve built and you will see, that it is no problem to balance CG. Now I plan to mount the motor behind the fuselage, to reduce noise and get less cross section / resistance. Tom ...
Possibly because this is a smaller and faster plane than I usually fly. Aileron travel is 15mm up and 10mm down. I might reduce it again. The build thread is here. I'm just uploading a hatcam video now. This is becoming too much fun and too much of a challenge...