Originally Posted by N6145k

Isn't there another thread for alternative power systems?

I think there is. Thanks for the link to another 60" Extra thread though.

I gotta find me a 16x8 xoar.

Extra EXP 60__Test 003 (5 min 15 sec)

Originally Posted by Doc Austin

https://vimeo.com/41129324

the video is set on private bro.i got yo password and am downloading now,but some folk might not have it.

There are so many possible combos of motor , speed controls , batterys , air temps , altitude ,ect ect ect , you almost have to try the different props to see how it works in YOUR setup , i fly mine with the 714 kv motor , a 15x7 falcon wood prop from adc hobbystore ,4s 4000 mah 25c gens ace packs ,cobra 80 amp speed control , more than enough power , long flight times and motor comes down just barely warm , what else would one want ?

I have a power meter coming, hopefully this week, but you make a good point Dennis.

I just got a Hitec A - 9 , like a new plane all over again setting it up ...

What did you have before? I am using a DX8.

Originally Posted by N6145k

It was a rhetorical question with a useful link.

But your discussion, as useful as it is to you, also makes it more likely that my questions will get lost three pages back as you go off what I thought was the topic.

We're here for you.

Thanks Oz. I have the recommended torque motor, and have been running a 15x6 xoar prop using 4000 mah batteries, leaving a lot of mah in the packs. I'm trying to figure out how much more current I'll draw WOT with a 15x7. I have a power meter coming, which will allow me to easily measure this at home.

Originally Posted by N6145k

Thanks Oz. I have the recommended torque motor, and have been running a 15x6 xoar prop using 4000 mah batteries, leaving a lot of mah in the packs. I'm trying to figure out how much more current I'll draw WOT with a 15x7. I have a power meter coming, which will allow me to easily measure this at home.

If your running the recommended setup. 15x7 xoar will pull app 1450 watts @ less than 70amp!

Im flying 7 hard, and fast minutes with 3600mah packs. depleting 2400-2600mah..

in stock here:
http://www.gravesrc.com/XOAR_ELECTRI.../xor1680ew.htm

Originally Posted by TG43

I think there is. Thanks for the link to another 60" Extra thread though.

I gotta find me a 16x8 xoar.

Be careful with the 16x8, tried it out today and my airboss was pulsing, came down and hooked it up to a meter, was pulling 80a and just over half throttle. I adjusted my throttle down to 40% and the airboss is still coming down pretty warm. If I'm going to use the 16x8, I'll probably get a different speed controller.

Originally Posted by UCDme3D

Be careful with the 16x8, tried it out today and my airboss was pulsing, came down and hooked it up to a meter, was pulling 80a and just over half throttle. I adjusted my throttle down to 40% and the airboss is still coming down pretty warm. If I'm going to use the 16x8, I'll probably get a different speed controller.

The ESC will get hotter at 40% than at 100%. At 40%, the FETs are going though high current/high resistance states more frequently than if you're at WOT. At least that is the theory: At WOT on an overpropped plane, motors get hot, at 50%, the ESC will get hot.

Originally Posted by Tim Semeraro

If your running the recommended setup. 15x7 xoar will pull app 1450 watts @ less than 70amp!

Im flying 7 hard, and fast minutes with 3600mah packs. depleting 2400-2600mah..

Hey Tim,

What 3600's are you running?

Curious as I have some Haiyin 3600's that are coming on the Brown truck sometime today.

Any issues with setting CG? Other useful tidbits you can share about them?

Thanks,

JC

EDIT - Brown truck arrived. Batteries are here! Should have plane finished and ready to maiden this weekend. Woo Hoo

Originally Posted by N6145k

The ESC will get hotter at 40% than at 100%. At 40%, the FETs are going though high current/high resistance states more frequently than if you're at WOT. At least that is the theory: At WOT on an overpropped plane, motors get hot, at 50%, the ESC will get hot.

At 100% the motor was fine but the esc was pulsing after about 4 minutes of flight. At 40% I ran it hard for 5 minutes and it pulses again, brought it down and the motor is 92 degrees and the esc was 140. Might be too much prop for this esc...