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Building Tips and technical articles. => 1/2 A building. => Topic started by: Jared Hays on January 20, 2014, 08:01:45 AM
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Built a SIG skyray for my girlfriends son and would just assume make it electric. Also have a Cox Hyper Viper that is underpowered even with a Killer Bee .049 installed.
What motor, esc, battery's, and timers would I need to do this. Not up to speed on motor size and performance of the electric stuff. Where can I get timers for these?
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Go to the electric section or PM Dennis Adimisin.
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Eric Rule at rsmdistribution.com can sell you a complete, ready to install setup.
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Go over to the "Getting all amp'd up" forum and look in the "List Your Setup" thread -- there are some 1/2-A sized planes in there. Keep in mind that for a trainer you don't need as much power, and may not want it.
Do a search on "ET-1". You'll find a Coreplast trainer designed by Larry Reniger. The recommended power system for that should power the Skyray just fine.
For the Viper, weigh it, then let us know.
I built a pair of ET-1's for my nephews for Christmas in 2012. I took Larry's recommendation to use a radio for throttle. It works great, for a beginner it lets you cut throttle when they're getting bored, dizzy, or into trouble, and for a plane that can only go around in circles it adds a dimension of fun. All the electronic stuff for a plane was about $70 from Hobby King, including extra batteries and a charger. The more you already have, the lower the price.
I'd get cheap motors -- he'll be using them for landing gear a lot, so you'll be replacing them.
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thanks guys I'll try to weigh the Viper when I get home.
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I fly my Skyray with a Turnigy 2730-1700Kv , 500 mah 3s , Brodak timer and 12 amp esc, Every bit as good as a COX will do all stunts that a Skyray can do.
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My cox Hyper Viper weighs 12oz with a .049 Killer Bee motor in it.
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Eric Rule at rsmdistribution.com can sell you a complete, ready to install setup.
Holy crap, don't really want to put a $170 setup in a $40 plane lol
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If you want to play, you have to pay. But, once you get past the initial cost look at the possibilities. I remember my first .35 size engine and thought that was way too much money.
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Holy crap, don't really want to put a $170 setup in a $40 plane lol
You can get it way cheaper at Hobby King. It'll be cheaper in all senses, not just "less money", but for a trainer that's going to be crashed anyway, why not?
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Yea I have a bunch of electric R/C stuff anyway so I know the savings potential from Hobbyking/CopyKing so I'll just go that route. I just don't understand all the #'s you see when looking at electric motors...Wish Hobbyking would list them like the $170 setup website. "This electric motor is replacement for .61-.76 glow motor" So thats what I need to know. What motor's and such. The skyray setup above I will pry just copy for my skyray since he said its comparable to cox .049 but my Hyper Viper could use .061 power. So need a turnigy motor for it that would be a little more than the skyray one.
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Yea I have a bunch of electric R/C stuff anyway so I know the savings potential from Hobbyking/CopyKing so I'll just go that route. I just don't understand all the #'s you see when looking at electric motors...Wish Hobbyking would list them like the $170 setup website. "This electric motor is replacement for .61-.76 glow motor" So thats what I need to know. What motor's and such. The skyray setup above I will pry just copy for my skyray since he said its comparable to cox .049 but my Hyper Viper could use .061 power. So need a turnigy motor for it that would be a little more than the skyray one.
I can see how it would get confusing. A good part of my living is designing motor drive circuits as well as control systems that use them, so sizing motors and electronics is a practiced art here. Even though I know it in and out, it's still a tedious job to find all the right bits and pieces, particularly when you have to add a bit of distrust in the specifications into the mix.