Power Systems for Extreme Flight Fanatics! - Page 118 - RC Groups
 Jun 16, 2012, 05:34 PM Registered User Tom flew the edge on 5 cells and I think he likes it.
 Jun 16, 2012, 05:42 PM RC Pilot / Photographer Which kv, which prop?
 Jun 16, 2012, 05:50 PM FLYAK
 Jun 16, 2012, 07:00 PM Registered User 638kv, 13x6.5 apc, 5s 2200, and Tom will get 7 mins easy. More to come.
Jun 16, 2012, 07:01 PM
Facts, Logic, 3D
Quote:
 Originally Posted by bryansifsof44
Ye asks and ye shall recieve... the battery is just done and we're setting up the camera

--Tom K.

Live from the field thanks to Siri
 Jun 16, 2012, 07:29 PM Volts>amps Yay subjective results! Now strap that combo in the extra for some speed!
 Jun 16, 2012, 07:31 PM RC Pilot / Photographer Wonder if I could use my 683kv motor on 5s with a 13x6? I'm using a 14x8 right now on 4s...
 Jun 16, 2012, 08:19 PM FLYAK Worth a try to see numbers Gary.
Jun 16, 2012, 08:30 PM
RC Pilot / Photographer
Quote:
 Originally Posted by bryansifsof44 Worth a try to see numbers Gary.
'cept I don't have a 5s pack! I'd have to buy one just for the test!
Jun 16, 2012, 10:05 PM
Facts, Logic, 3D
Quote:
 Originally Posted by -= GYRO =- Wonder if I could use my 683kv motor on 5s with a 13x6? I'm using a 14x8 right now on 4s...
Grr! That sounds nasty! Be careful you don't make the magic smoke come out... should be interesting. My dad's 630ish motor on 5S with a 13x8 was UN-BE-LIEVE-ABLE! I'll get the video together soon, but I spent about a minute of the flight going from hover, punching vertical about 30 feet (took less than a second), pushing full down into a downline, then pushing full throttle and full up to rotate it 180 degrees back up into a hover, then punching it up again. It was SiiiiiCK! I'm going to go grab the footage off the camera and see what I can do with it.

--Tom K.
 Jun 16, 2012, 10:52 PM Volts>amps Any thoughts on top speed between the 14x7 on 4s vs the 5s and props you tested today?
 Jun 16, 2012, 10:55 PM Facts, Logic, 3D I'm not sure about the math, but the 5S setup seemed faster. The video is importing to my editor now... gonna be a long night. --Tom K.
Jun 16, 2012, 10:57 PM
Registered User
Quote:
 Originally Posted by Tom K. Grr! That sounds nasty! Be careful you don't make the magic smoke come out... should be interesting. My dad's 630ish motor on 5S with a 13x8 was UN-BE-LIEVE-ABLE! I'll get the video together soon, but I spent about a minute of the flight going from hover, punching vertical about 30 feet (took less than a second), pushing full down into a downline, then pushing full throttle and full up to rotate it 180 degrees back up into a hover, then punching it up again. It was SiiiiiCK! I'm going to go grab the footage off the camera and see what I can do with it. --Tom K.
That was a 13x6.5e APC. Tom.... I know it must have felt like a 13x8, and it looked like one too, but only a 13x6.5.
 Jun 16, 2012, 11:06 PM Registered User I was flying around in the high winds at only a few ticks above idle, vertical was ballistic... a virtual dot in the sky in four or five seconds, every pump of the throttle was a lion's growl. Personally, running from one side of the field to another in a blink of an eye with the Edge is not my style so I'll probably go back to the 14x8 on 4S if Tom didn't kill my plane. I may also go down to 2200's when I buy new batteries because the one I have now makes for a nice light setup. I agree that going to the 5S setup should be much better on the Extra.
Jun 16, 2012, 11:23 PM
Volts>amps
Quote:
 Originally Posted by Tom K. I'm not sure about the math, but the 5S setup seemed faster. The video is importing to my editor now... gonna be a long night. --Tom K.
Let me guess, the 14x7 had good acceleration up to a certain point where the 13" props just kept pulling like a feight train.

Its ridicously fun combo though isn't? You just want to keep hitting the throttle over and over again watching the bird zip a long