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| Electric Flight Discuss Electric Flight in Canada |
Topic Review (Newest First)
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| 05-02-2016 10:36 AM | ||
| stegl |
Re: New to electric flight Quote:
The unfortunate thing when new to buying Brushless motors and ESC's one does not really have the complete information available . I know I stumbled onto it after about 2 years into a total of 6-7 years of brushless running. I see so many local users look at the price tag , cell count and max amp draw and then buy. Another example say on the motor go to Innov8tive Design and check the prop parameters on a specific motor say 40 series and see what I mean; as they have dozens of combinations right down to the brand of prop. Hacker make a good motor but are too general ( in comparison) with suggested prop sizes and they don't specify what brand of prop. Other considerations are type of aircraft , all up weight with batteries and type of flying . http://innov8tivedesigns.com/images/...40%20Specs.htm I just grabbed a link to one motor, hope it works. |
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| 05-02-2016 09:58 AM | ||
| twistedge |
Re: New to electric flight I agree that we need more detail on the version of the motor... it's impossible to know if we're over propped without more info (like KV, or a link to the motor). The Hacker A50-16 S V3 is 365KV and recommends 17x9 for 1210 Watts, so we'd be in the ballpark. The Hacker A50 -14XS V3 520KV is simply too small for an 8.5lb plane. Both are 14 pole motors. |
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| 05-02-2016 09:49 AM | ||
| michaely |
Re: New to electric flight Quote:
Usually, on the motor there will be a letter (eg. "A") after 14 and elsewhere on the motor will be a "xxx"rpm/V. I and others can use ecalc or other online motor performance programs to advise what range of props you should be using with 6s .......and others have already suggested that you are using too big a prop or the wrong prop but a 36 amp draw is not a lot for this size motor so perhaps some other issue, such as best number of battery cells is involved. Additional information: Here is a link to some specs on the model: http://graysonhobby.com/dynam-smoove-arf-balsa.html A 17x12 prop is recommended, along with a 6s battery and a motor "G601 5030 kv400" which useful information. (Not familiar with this specific motor but the kv information useful) Puzzling is the weight given for the plane: 2400 to 2500 grams which translates to 5.5 pounds, much less than the 8.5 pounds you quote. Although the specs include a wingspan of 63 inches, wing area is not given; can you supply this or the root and tip chord length. |
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| 05-02-2016 08:53 AM | ||
| Garry Howard |
Re: New to electric flight Hacker motor is a50 14-pole v2 no screeching noises, could be I am over propping ?? |
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| 05-02-2016 08:29 AM | ||
| twistedge |
Re: New to electric flight Which model motor do you have? The Hacker website show much higher numbers for the same prop/battery combinations on the A50-16 S V3 14-pole 1210 Watts on your 8.5lb plane would give 142 Watts/pound.. which is plently for pattern flying. Are you hearing screeching noises at any of the throttle ranges? There are usually some tell signs if the timing is off on a brushless motor. http://www.hacker-motor-shop.com/e-v...&c=6681&p=6681 |
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| 05-02-2016 08:13 AM | ||
| Garry Howard |
Re: New to electric flight If my esc has 12 degrees timing and motor is recommending 20-25 would that effect power output from the motor |
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| 05-02-2016 06:08 AM | ||
| cessna180 |
Re: New to electric flight eCalc computes you should use a 14/8 prop and web-o-calc a 14/10 prop Michael |
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| 05-01-2016 07:54 PM | ||
| Garry Howard |
Re: New to electric flight Thanks you guys, numbers were actual measurements, I will try the calibration Monday |
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| 05-01-2016 07:29 PM | ||
| stegl |
Re: New to electric flight Quote:
I also go with Castle Creations ESC's as programming them to get the best performance is one of the easyiest out there . Doing some comparisons and think you may also have too much prop and pitch, lugging the motor down. |
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| 05-01-2016 07:18 PM | ||
| cosmith |
Re: New to electric flight I would start by checking out the manual for the ESC to see how to program it. Then look up recommended settings from Hacker and match them up. Make sure you're running the correct prop for the lipo you're running as well. Hacker rates that motor for 1250 watts and they seem to under rate them by a large margin so you should be able to get at least that. Aside from that, 30c is fairly low and depending on the lipo you could actually be getting less. One last simple thing, make sure your radio has 100% travel on the throttle and calibrate your ESC to your throttle...that should be in the ESC manual as well. Often times it's as simple as powering the ESC up at full throttle and waiting for a tone. Take the prop of before trying anything your aren't 100% sure about. Let us know how it goes! |
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