New Fast Funjet...

[akent]

Here is a video of my new and improved Funjet's maiden flight!

This video is nowhere near good enough for a doppler, and my speedometer was somehow lost from the last generation Funjet's crash.
I am too far away and too high. But this thing is FUN, and you can hear it at least!
If you notice, I'm also flying into about a 20mph headwind. There is rule at the club where you must take off into the wind and then do that flight direction. I was alone in the air, so I could have turned around, but I didn't.

This Funjet consists of:
Turnigy Typhoon 36mm 1800kv motor (hotrod 500 heli motor)
Castle ICE 120 amp ESC
Hitec HS65HB servos
6s 1800 50c battery
APC Pylon Racer 6.5x5 prop

I love how it just rockets out of my hands at launch!
That's about half throttle.

What you can't see in the video is how the thing seems to teleport itself forward when you nail the throttle! It JUMPS forward a LOT!

[Gabe]

Kent, I can't remember if I asked u about the amps yet? If you're under your esc and battery limit you could prop up to a 7x5.

[akent]

It's pulling 109 static amps with a fresh battery! 2.3kw on the Wattsup with this prop (APC Pylon Racer 6.5x5).
That's about 400 watts more than the APC S400 5.5x4.5 prop.
I need to hook up the ESC to the computer! I can do that now!

I haven't done that yet, but I think I'm becoming a fan of Castle.
I learned while I was flying this that the ESC can beep stuff at you when you land to let you know if there were problems! That's way cool.
Kent

[akent]

Hey Gabe, have you tried a Pylon Racer 6.5x5?

Oh, and I will be modding the battery area. I just got in some Turnigy Nano Tech 6s 50C 2200's! I won't need to overamp my little 1800's any more! Maybe more power?
We'll see.
Kent

[Gabe]

Yup, I have 2 or three of them in my drawer. The theory though is that the larger the prop diameter, the more thrust and torque you will attain, thus overcoming the static drag smaller diameter props can't. In short, bigger props=more watts=more speed.

109 amps is a lot of current on those batteries. At 30C x 6 cells though, you should be able to push 180 amps through those batteries (in theory). So then it's up to the motor to handle higher amps.

If you have a 7x5 sport prop I would throttle up for a 2 second WOT on the bench and then check the ICE log for max amps. If your safe, go for a 3 second WOT, check the log. And finally a 5 second WOT. There should be a big spike in amps right at the start of hitting WOT, but 1 second later it should unload and drop significantly.

Just a suggestion. If you're not comfortable with propping up, don't take the chance. You've got a really killer machine right now.