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Electric SBACH 60"

Old 03-14-2013, 01:43 PM
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ARTURO_FERRARIN
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Default Electric SBACH 60"

Hi, I have just purchased the OMP SBACH electric 60"
I am very happy with product quality and the carbon fiber items.

Just a question about the motor: I would like to purchase a Hacker motor and need a confirmation/help from you:

On the boxthe suggested motor is a HACKER A40-12S or A40-14S, while on your site you state A50-14S.

What abouttheA50-16S and 6 cells (turnigy 3850mA 65-130C, 670 grams)am I adding too much weight with this setup?
Any considerations from your side?
Please help

Thanks for replying.
Old 03-24-2013, 11:27 AM
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AirTech
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Default RE: Electric SBACH 60


ORIGINAL: ARTURO_FERRARIN

Hi, I have just purchased the OMP SBACH electric 60''
I am very happy with product quality and the carbon fiber items.

Just a question about the motor: I would like to purchase a Hacker motor and need a confirmation/help from you:

On the box the suggested motor is a HACKER A40-12S or A40-14S, while on your site you state A50-14S.

What about the A50-16S and 6 cells (turnigy 3850mA 65-130C, 670 grams) am I adding too much weight with this setup?
Any considerations from your side?
Please help

Thanks for replying.
I'm also interested in purchasing one of these and have been doing some research in regards the best motor combination. I have a 53" wingspan Great Planes Matt Chapman 580 powered with a Hacker A50-16S and 6S 3200mAh Turnigy 45-90C. The @Calc modeling predicts 49.74A and 1119.7W at optimum efficiency turning an APC 16X10E prop and a static trust of 6491g (14.31lb.). The actual static power measured with a Electrifly PowerMatch comes out to be 47.14A and 1064W. The plane weights 8lb all up and with a Thrust to Weight ratio of 1.79:1 is more than 3D capable although the wing loading is a little on the heavy side.

On the other hand the SBach is a 60" wingspan model with a weight of 4.75 to 5.25 so a Hacker A50 16-S with 6S 3200mAh battery would be a killer combination predicting 47.10A, 996.8W and a static thrust of 192.6oz. (12.03lbs., 2.29:1 Thrust to Weight ratio). If you like to make your own calculations go to [link=http://www.ecalc.ch/indexcalc.htm]eCalc[/link]. I hope to pick one up at the Toledo show in a couple of weeks from now. If you can please publish your build experiences in this forum.
Old 04-17-2013, 06:47 AM
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Default RE: Electric SBACH 60

Hello Gentilemen-

Sorry for not responding to your questions, I wasn't aware of this thread. Anyways, to answer your questions, the airplane was designed around the Hacker 50-14 motor. The prototype used that motor with a Caslte 80amp ESC and 5s 3300mah 35c lipo. If you go with a 40-12 you'll have enough power to fly pattren but not 3D. If you use the A50-16S and 6 cells (turnigy 3850mA 65-130C, 670 grams) you'll be adding a lot of weight you don't need. You'll have the power, but the weight will make the plane sluggish. I personally use the Dulsky motor that came with the combo and I had a castle 100 not being used so I'm using it, and a Trunigy 5s 4000mah 40c lipo. Here is a link to another fourm talking about mine and other 60" Sbachs. Also there is a link to the video of it flying. Perhaps you can find some more answers there.
http://www.rcgroups.com/forums/showt...1845114&page=6

Donnie

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