cgage
Flying officer
Posts: 15
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Post by cgage on Nov 3, 2009 1:51:04 GMT 1
I am converting SCLP to ailerons. Will use stock motor for a while. Can I take the esc from the t28 and hook it to a 6100 that I use in my T28? Doesnt seem likely since the Brushless motor has 3 wires leading to the esc.
Or do I need to buy a brushed 20 amp esc?
Can someone recommend a specific esc to put between my brushed stock motor and a 6100?
Also, I have a spare AR500 if that would be better.
My tx is a Dx6i.
So far, the SC is the only plane I like to fly.
Confused.
Thanks for your help
Cgage
Two SC LP's One other for spare parts
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 3, 2009 4:23:16 GMT 1
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Post by flydiver on Nov 3, 2009 4:43:37 GMT 1
Sorta but probably not. It has a 1A BEC.
You will be using 4 servos?
Assuming a conservative .5A/servo > .5 x 4 = 2.0A.
Pretty much if you run 3S lipo + 4 servos you need to consider an aftermarket BEC.
THAT + the ESC will work fine.
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 3, 2009 17:07:05 GMT 1
I need to buy another esc that is 2a ? Or is the bec added on. Somewhat new to this.
Thanks
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Post by flydiver on Nov 3, 2009 17:41:21 GMT 1
This is an unfortunate surprise to almost all up graders. It's better to be surprised on the ground than in the air. Modern electric ESC are really an ESC + BEC rolled into one. For most folks most of the time once you reach 4 servos and 3S you need to strongly consider disabling the onboard BEC and adding an aftermarket BEC designed to handle the load. 2A is probably not enough. Frankly everyone seems to use the Hextronic type cheap servos and they are power hungry. (see links below) Even 3A is kind of a crap shoot if you use cheap Chinese ESC. I discount ALL Chinese specs by at LEAST 20% unless proven otherwise. They 'fabricate'. There are costs associated with going cheap. The ESC will not hold the Amps specified and the servos can use almost 2x the power of Hitec HS55. Another similar thread going right now: supercubclub.proboards.com/index.cgi?action=display&board=rg&thread=2617&page=1For a far better understanding read this and FOLLOW THE LINKS, THEY ARE IMPORTANT. supercubclub.proboards.com/index.cgi?board=rg&action=display&thread=1858I know-not what you wanted to find out. Learn now or pay later. Flying is an unforgiving endeavor. FWIW the T-28 gets away with this because they use E-flite Pro 30A brushless ESC installed with a SWITCHING BEC which is much more efficient than the LINEAR (heat making) BEC on cheap ESC. www.e-fliterc.com/Products/Default.aspx?ProdID=EFLA1030Quoting from another post: [As for Switchmode versus Linear, a linear BEC uses resistance to reduce the voltage, which translates to heat. Most of the smaller ESC's with inbuilt BEC use Linear BEC's wich will add significantly to the heat of the speedy. A switchmode BEC, as is built into the larger Turnigy ESC's and a lot of other quality ones, uses electronics to control the voltage drop and generate very little heat in the process. Much better. Most external BECS larger than 3 amps use this technology too.] The [Pentium 40 ESCs now have swiching UBEC] will do a similar job most likely (no personal experience). www.rcgroups.com/forums/showthread.php?t=882682&page=2Short answer-staying with the brushed motor is likely more of a hassle than it's worth. |
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 3, 2009 19:15:10 GMT 1
Thanks. Is going brushless going to make the SC fly much more intensely? I like the easy going characteristics.
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 3, 2009 19:22:00 GMT 1
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Post by flydiver on Nov 3, 2009 21:39:58 GMT 1
Thanks. Is going brushless going to make the SC fly much more intensely? I like the easy going characteristics. Depends entirely on the motor. You can go from even less power to WAY WAY (stupidly WAY) more power. You need to start learning about KV and how it applies to selection, watts/Amps, and watt-Amps/pound. For a reference the stock LP is about a 13A setup. There are several of those type of mounts available. As long as the motor screws fit they should work well and not be as fiddly as doing it yourself. |
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Post by flydiver on Nov 3, 2009 21:49:31 GMT 1
Kind of a hoot, eh? Folks buy a cheap SC, get frustrated with the electrics, and go Spectrum. Their cheap hobby now is up to $400-500 and they are flying a Cub. In retrospect similar $$ thrown at this: www.horizonhobby.com/Products/Default.aspx?ProdID=EFL4800With a mentor and a buddy box and you would really have a nice plane. Naw, I didn't do that either..... Likely THAT plane would end up as rubble and then you'd really cry. |
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 8, 2009 1:26:39 GMT 1
OK. Just going to keep it simple.
Transfer my stock T28 motor, esc, and sirvos into the SC with ailerons cut. (Plus there's an adapter motor mount available on ebay which fits eflite motors).
No reason why this wont work?
Only thing else is decide which prop to use.
Later on when I learn to fly better, I can put the stuff back in my T28
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Post by flydiver on Nov 8, 2009 7:52:53 GMT 1
You mostly don't prop for the plane, you prop for the motor. Use the stock T28 prop.
Frankly I'm not sure you are going to get enough of a 'step down' to make that hassle worth it. I'd just fly the stock LP til you're sick of it and then move to the T28, that's the simplest.
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 8, 2009 15:48:29 GMT 1
Thanks for the advice
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Post by flydiver on Nov 8, 2009 20:01:43 GMT 1
BTW-you said you like the easygoing characteristics. It will not be easygoing on the T28 power pack. That's why I suggest you consider just leaving it alone.
You can always turn the power down of course.
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cgage
Flying officer
Posts: 15
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Post by cgage on Nov 9, 2009 18:16:02 GMT 1
By power down, you mean less throttle? By easy going I was also referring to the high wing characteristic of being stall friendly. Even if the SC had a faster motor I'm thinking that it would still be a lot easier to fly because of that. I could be wrong. Ive got two SC's plus another one that I try different mods on (lg, and now ailerons for example). Since Im not flying the T28 for a while I was considering borrowing its parts. Could be a waste of time but I enjoy the work. I'm also going to get an Eflite Apprentice.
Thanks for your interest.
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Post by flydiver on Nov 9, 2009 19:03:36 GMT 1
If you like it, have at it. Though it is extremely popular I'm not a fan of full conversion of the Cub. Too many hassles (amply described above) and there are planes made and designed for that.
I'm not sure that a fully converted SC with T28 gear in it is much easier to fly than the T28 straight up. OTOH you don't get the experience of the conversion which in itself is worthwhile.
Do it, then tell us.
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