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Author Topic: Big Dawg A/B electric  (Read 922 times)
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Scottl0413
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« on: December 21, 2017, 09:39:30 AM »

Attached are pics. of my new Big Dawg for A/B electric. Pwr. is a Cobra 2217/8 at 2300 kv, battery is 1000 mah, 65C, 3 cell, ESC is a Proton 30 amp programmed for slow start, prop is an APC 8 x 4. Ready to fly weight is 580 grams or 1 gram/sq. inch of wing area. First flights will be at K.O.I. next week in Florida.

Scott
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Big Dawg A/B electric
Big Dawg A/B electric
Big Dawg A/B electric
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Konrad
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« Reply #1 on: December 21, 2017, 01:39:40 PM »

Are you using any timers? And what if any over current protection are you using should the prop hit something (AKA as a Fig.9)?

All the best,
Konrad
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Cut it twice and it's still too short!
Scottl0413
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« Reply #2 on: December 23, 2017, 09:53:54 PM »

Konrad, timer is Texas Timer electric timer. It's the first time I've used one so we'll see how it goes. Initial testing looks really good! I have to current protection on this plane and haven't used one on any of my other electric planes. Have not had an issue yet if the plane or motor crashes before timer times out!

Scott
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MI FLY GUY
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« Reply #3 on: January 18, 2018, 10:34:16 PM »

Attached are pics. of my new Big Dawg for A/B electric. Pwr. is a Cobra 2217/8 at 2300 kv, battery is 1000 mah, 65C, 3 cell, ESC is a Proton 30 amp programmed for slow start, prop is an APC 8 x 4. Ready to fly weight is 580 grams or 1 gram/sq. inch of wing area. First flights will be at K.O.I. next week in Florida.

Scott
How did you do @ KOI?
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Scottl0413
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« Reply #4 on: January 20, 2018, 09:59:28 PM »

Thursday was a trimming day and the Big Dawg was flying great until it decided to DT in the creek!!!!!! Don't think it hurt any electronics since the timer LED was still flashing when I picked it up very gently. Unplugged the battery quickly, but the motor had been covered so didn't try and fly anymore. Got it home and re-lubed the bearings and everything seems to be ok!!! Will be going back the Palm Bay for there March contest. We'll see how it does than.

Scott
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John
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« Reply #5 on: January 23, 2018, 12:16:23 PM »

Hi Scott,

How did you find the performance with the Cobra 2217/8 at 2300 kv, would like to know as I am soon going to order two for the Crescendo's I am building, only fuselage's to finish off, and I think the Crescendo's are around the same wingspan as the Big Dawg so should give me a similar performance.

John
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Scottl0413
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« Reply #6 on: January 23, 2018, 07:31:20 PM »

John, the Cobra motor has lots of pwr. and flew it great! I do use a gas 8 x 4 APC prop with it and it really gets it. 2 min's on five second motor run is not a problem!!

Scott
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John
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« Reply #7 on: January 25, 2018, 10:40:40 AM »

Hi Scott,

Thanks that sounds good so think I will go with this motor, could you let me know the best place to order them from.

John
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Scottl0413
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« Reply #8 on: January 25, 2018, 06:28:37 PM »

Innov8tive designs as a web page with all the Cobra motors and everything else.

Scott
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