WildHare "Baby Bunny" Conversion

[Shaggy]

Hey guys,

I'm pretty new around here, but I know that you guys are the best resource for 3D hucking for Fatties.

I am interested doing an E-conversion of WildHares 120sized Edge 540.
http://wildharerc.com/products/Edge540Extra260/

Has anyone done this here? I'm just looking for general info at this point. How many watt's am I going to need? How many cells am I going to need to run?

Do I need to take additional weight savings measures?

I would really appreciate any advice you guys can lend!!

Thanks,

Andy

[Shaggy]

The OS 120AX they recommend puts out about 3.1hp, which should be around 2300watts.

If I can get the same weight, I should be good with a motor in this range right?

How about either of these two?

http://www.hobbycity.com/hobbycity/s...idProduct=5144

http://www.hobbycity.com/hobbycity/s...idProduct=2097

Thanks again!

[Uncle Brett]

Hey Shaggy,
If the weight estimates on Wildhare's website are correct, this plane should be a great flyer and 2500 watts sounds perfect. You have a lot of choices as far as power systems go. To name a few: Hacker A60 22S; A60 18M; Hyperion Z5025. I'm not familiar with those Chinese motors but the price looks good. I would go with a 10s battery set up like FlightPower EVO 25's or Thunder Power Extremes in the 3700 - 5000 mAh range with the smaller batteries more for 3D (lighter wing loading), or maybe some A123's if money is more of an issue than weight. You'll also need a good ESC that can handle the voltage of the batteries, like a CC85HV or a Hacker/Jeti Master Spin 77 or 90 Opto. Good luck, keep us posted.

[Shaggy]

Hey man,

Thanks for the feedback!

The only reason I'm considering doing this thing with Epower rather than an OS120ax is that I have heard tons of great feedback about those chinnese motors and batt's.

I'm thinking I could run two 5cell packs in series so I'm runnin 10s rather than 9 and thus getting more of my power from voltage rather than current.

That way I could also use those 5s packs in a 60sized setup if I end up being satisfied with the chinnese gear.

If anyone else has done some Econversions that would like to help me pick a motor/prop combo that would be awesome. I'm not sure what KV I'll need, I'm assuming with higher voltage (ie 10s) I should shoot for a lower KV wind.

Thanks again!

[F3AFlyer7]

Ok I used the following motor and did some stuff on moto calc and here are the numbers I got for you.

HXT 63-64-A 280Kv 65A Brushless Outrunner (52-30)

Prop: 16x8 APC
Battery: 10s1p 4900mAh
Motor Amps: 59.962
Prop Pitchspeed: 71.2 mph
Static Thrust: 283.2 oz = 17.68 lbs of thrust.
Efficiency: 91.6%
Motor RPM: 9394.61

It looks like you will have more than enough power with this set-up. The only thing I would be careful of is buying cheap chineese motors and batteries. You don't wanna spend all that money and end up with a poor or dead product with no customer support.

Here are some other motor suggestions:

AXI-5330-18

Hacker A60-20s

Himax HC6320-250

Hope that helps!!