jonathan71411
[INDENT=1]Thanks in advance to anyone with any useful info to share. I am trying to build a nice, steady slow flyer capable of 3d. I would prefer at least around seven minutes flight time. Just bought my fourth plane, a Red Eagle "Hummer", an epp foam nice looking solid built 3d model. Flying weight suggested around 400g. What I have on hand is:

[INDENT=1]Detrum BM2810A-KV810 (only writing on motor, came with 37in Dynam extra 330 epo)

[INDENT=1]iPower outrunner iX series 1450KV iBM 2208-14

[INDENT=1]Detrum esc 25A 2-6 lipo

[INDENT=1]hobbywing flyfun esc 12AE 2-4s bec [EMAIL]5V@2A[/EMAIL]

[INDENT=1]gForce 7.4V 20c 1000mah

[INDENT=1]gForce 7.4V 30c 800mah

[INDENT=1]11.1V 25c 1300mah

[INDENT=1]11.1v 10c 1250mah
[INDENT=1]props from 8x3.8 - 10x8
[INDENT=1]I would like to use what i have, but naturally if i could get a large + from buying a different part or two I would. What I am trying for is a slow flyer capable of 3d, slower the better, as I am flying in limited area, around a 200ft diameter. Thanks again, this is the most fun I have had in 20 yrs! How about RIGHT!!!?
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jonathan71411
I would really appreciate some help with this, im not sure which motor to use, or if both motors are insufficient, which batt, esc, etc would give it enough power, and still keep it flying slow when i want. Or if i should buy a different motor, batteries or whatever, also prop size.. Building the plane now, hope to be flying this evening if weather permits.
How about RIGHT!!!?
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jonathan71411
Really wondering if I should use the larger KV motor for more rpm or the lower KV for more torque, which is better for slow flying? Would a higher KV make the plane more stable, or do I need the thrust and could i use the larger motor at 50% throttle and have the extra power on hand for extreme moves? Any input at all would be helpful...
How about RIGHT!!!?
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squishy
For 3d airplanes and slow fliers I like motor in the 1000kv range. You want a lot of torque, not speed and rpm on a 3d airplane...
"Education is not about filling buckets; it is lighting fires." W.B. Yeats

http://www.youtube.com/user/squishy654
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jonathan71411
So the 810KV motor would be better? Which size battery and prop would you recommend? I do want to fly slow, but I also want power in reserve, so, say if I'm trying to turn i can avoid the nose lifting up and harriering slowly forward with not enough power to climb out of this position, and loss of control which means for me in my enviornment I get to climb a 60 ft pine tree, . I envy the wide open spaces you guys have out there, here its woods.
How about RIGHT!!!?
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squishy
I don't know the airplane well enough to say, you need to use the recommended motor and prop for the airplane though...don't change it, they are recommended for a reason..
"Education is not about filling buckets; it is lighting fires." W.B. Yeats

http://www.youtube.com/user/squishy654
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jonathan71411
well i was hoping to slightly overpower it, I'd rather burn up a motor or esc than climb another tree I think. I was advised to use the detrum motor with 3s 30c 1300- 1500 mah, with 8x3.8 - 9x5 prop and 25A esc. I'm going with that for now as I have all that on hand, really hope this rain stops this afternoon. Thanks for your input!
How about RIGHT!!!?
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jonathan71411
Awesome plane!!! Finally one that flies like i want, i would recommend this plane for anyone. Sturdy enough to take an occasional hit, I burned down 4 batteries with no damage, nothing to fix this time! It would benefit from a lil weight in the nose, and a lil more power somehow. I flew a 10x4.7 with the 30c lipo. Maybe a 10 x 6? 8? Ran it a good 30 minutes and the motor cool as a cuke. Considering ordering the spare parts for my extra 330, i was too scared to enjoy the speed at first, think i could handle it now with enough area....
How about RIGHT!!!?
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colin222
very nice info and it would be nice stuff but i think speed will be less and torque will be high........
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jonathan71411
Anyone care to take a whack at explaining why high torque is better than high rpm? Using a 10x4.7 prop as an example, a high torque 810kv motor vs a higher rpm 1450kv motor, the 1450 spinning at roughly twice the rpm, same prop, should produce more thrust ?
How about RIGHT!!!?
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