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| Electric Flight Discuss Electric Flight in Canada |
Topic Review (Newest First)
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| 12-13-2015 03:37 AM | ||
| Cougar429 |
Re: Need some advice regarding BEC's As stated it was not a question of performance, just access. Also, Hacker had the 2500Kv Jason Krause at the Toledo show and after the first decided to stay with them. This was a few years ago. Most of the electric helis are on the shelf awaiting me to get back to them. I have to admit now I spend more time tinkering on their mechanics while hauling the fixed wing fleet to the field. |
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| 12-12-2015 09:49 PM | ||
| stegl |
Re: Need some advice regarding BEC's Quote:
Hacker make great motors but you have to go up in size to a bigger motor to get the same performance , sometimes less. This I am going from first hand experience with another Deuces local flyer. Run a Porsche or a Ferrari, expect a little more maintenance.... run a Chevy or Ford and you can go a while longer with no maintenance. |
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| 12-12-2015 09:28 AM | ||
| mrrandyman |
Re: Need some advice regarding BEC's My Cessna weights about 12.5lbs. I'm a scale flyer so if it does go vertical it sure wasn't because I wanted too. Ha Ha Len mentioned he is using a Scorpion 440kv in his. |
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| 12-12-2015 06:50 AM | ||
| Cougar429 |
Re: Need some advice regarding BEC's What does your 182 weigh? Will you be staying with scale flying or wanting unlimited vertical? In helis I stayed away from Scorpion due to their requirement to manually lube the bearings on a regular basis. In such a tight airframe that would be difficult, at best. I went with Hacker and love them. |
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| 12-11-2015 08:44 PM | ||
| mrrandyman |
Re: Need some advice regarding BEC's Great, Thanks Len |
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| 12-11-2015 06:09 PM | ||
| stegl |
Re: Need some advice regarding BEC's The Scorpion brushless motor has had a number change on it but the equivalent would be the Scorpion S11-4020-540 kv with a 6s battery around 4 to 4400 mah ( which is what I have) or you could go with the S11-4020-630 kv with 5S same capacity. That can swing a pretty big prop but I am using a 16X8 APC but am thinking of going to a 16X10 maybe this next year . The CC ESC is perfect. As I may have mentioned , I am running all digitals using Airtronics servos and not an issue with the onboard 5am BEC set at about 5.1 volts. For Motor mount I used a great planes adjustable motor mount. Will post a link to the build forum. http://www.rcgroups.com/forums/showt...107838&page=14 I have posted a link on this page to another link.... lotsa reading. I see some flyers have been using the nylon clevis's ... dump those , just courting disaster. |
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| 12-11-2015 03:11 PM | ||
| mrrandyman |
Re: Need some advice regarding BEC's Thank you for all the replies. I think I'm getting my head wrapped around all this. I find Electrics fascinating. I thought it was just a matter of buying a few things and slapping them into the plane and going flying. Boy was I mistaken. I contacted CC and the fellow there described a far bit about their products. He did mention in his email that he used an external BEC on everything that had Digital Servos except when using a Talon. He said the Talon could handle anything. I wish I could post his reply but I don't want to without his permission. Needless to say I ended up picking up the Edge 100 ESC and bunch of other items for the plane so fingers crossed if all my calculations are right it should work out very well. I'll post some pictures of the installation so you folks can advise. Len, I have the Cessna 182 ARF (topflite) it is currently Nitro but I would like to convert it over to electric. Could you send me a material list of what motor, esc ect. that you used please? Thank you all. |
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| 12-11-2015 12:35 PM | ||
| stegl |
Re: Need some advice regarding BEC's Hi Gary: you failed to mention what brand of ESC's were burning up ? My experience is only with Castle creations and had one twin installation were I know I was driving the ESC's at full rating on the ground ( too much pitch) to about 105% of the max rating but thought that when the motors were unloading in the air that maybe I just might get by as this was my first experience at higher power installs. I didn't have any smaller pitch props so decided to do the maiden anyways but was prepared in the case of ESC shutdown to cycle the power back to idle/shutdown. That was the case as it happened so I just cut the throttle when in the air and then back up to 75-80% power or less as required , which was still more than adequate and finished that flight plus many more that day but not using full power. Changed the prop pitch after that and kept the amps down to about 80% of max. A quality ESC like CC will shut down if overheated and the BEC will still provide power to the receiver and servos as that is a separate circuit board or circuit . It's the cheap stuff that guys buy that will burn up as they are not designed to be overdriven . End of the story is that you get what you pay for and the cheap is no longer cheap. AND yes all ESC's do require some sort of airflow and putting them in a bag is NOT in the instructions, I am sure. |
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| 12-11-2015 07:33 AM | ||
| Cougar429 |
Re: Need some advice regarding BEC's I forgot to include that even if not directly stated, most or all ESC or BEC's ratings are only good with a minimum 5 MPH cooling airflow. That's why stuffing either in a stagnant area such as the middle of a fuse or behind a firewall can lead to short life expectancy. As an example, we had a float fly at a friends cottage a while ago. Lots of us showed up with the popular Polaris amphib. Things got interesting quickly as one started to lose power quickly, settle onto the water and began to smoke heavily. Smoke turned to flames, which being of foam construction burned the fuse down to the waterline in short order, (first time I got to see firsthand that fire and water DO mix!). We found out the owner had just come back from Florida and had wrapped the ESC in a plastic bag to prevent corrosion, (strongly suspect it did not fly there as will be explained). The lack of cooling airflow, or any at all for that matter, had the ESC burn out quickly. What I cannot figure out was how he retained control as that overheat should have shut down the BEC as well. Forgot to ask if he had an external BEC and and there really was not enough left to discern. Castle has been consistently good, repairing any line that has problems. The original blue 10A ESC's and early 20A PRO's could be sent in for repair/upgrade. They also did very well selling the BERG line of receivers. I have used them for years and they were rock-solid 72 MHz gear, with the capability to program failsafe, channel outputs and other factors from your PC with the link, (also used to program or update their ESC's). If any complaint it was they maxed out at 7 channels  .
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| 12-10-2015 11:44 AM | ||
| stegl |
Re: Need some advice regarding BEC's Good points, Gary . I have a IR temp meter from Princess auto , others would work . To check hard to get at spots such as cowled motors for either esc/bec and motors as long as line of sight is available. Gets actual temp in C or F for comparison purposes. Castle Creations has great email customer support for questions or concerns. Not available from most all others, except maybe other high end manufacturers. CC did a free fix on one of my ESC a couple of years ago on a drowned bec that quit. And mailed it back prepaid. Even though they say no warrantee on drownings. This was even after original warrantee expired. Makes it all worth while. If you online shop and are prepared to shop good buys can be had. That's the way I do it. |
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