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 ...
By carefully sanding the fuselage trusses I was able to get it to align to the center of the fuselage, which would make the firewall square to the flight path (0 degrees right thrust) as desired. The top section of the fuselage truss is flat in respect with to the direction of flight,...
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...
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 ...
Will an engine that has too much up or down thrust affect that? I redid the CG on the plane last night and it was extremely nose heavy. Hopefully things are a bit better on the next test flight. Appreciate your insights. Mar 15, 2021, 11:03 AM #42 GWRIGHT Registered User ...
No climbing at WOT and plane has a reasonable glide Head head I know you know all this but for info... A different wing definately needs the thrust angle altered.. with the KFm lifting wing, that angle as seen in the pic will act to lever the back of the wing...
Try this COG calculator... http://adamone.rchomepage.com/cg_calc.htm At last some sunshine.. Ive flown the over powered, flat build, 26" KFm4 mini heart shape again.. 16oz AUW with 34+oz thrust... Top speed is not excessive with the combo I am using, perha...
Is it possible for a plane to fly without pitch speed? --- Well? The real question in the end is does the propulsion system generate enough thrust to counter act the drag for a given flight speed? Thrust is velocity spread over the area of the prop; changing the diameter influence this...
Amongst others, Sub section "Aircraft Design. Airfoils, Pull-Pull Systems, Flight Trim & Static Thrust Calculator." on my web page may provide answers and calculators for all of your questions during the build and set up. e.g. Ackerman linkage for Pull Pull systems - B.Felice Aerodynamics...
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...