Scorpion 2221-6 to much for scale? - HeliFreak
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Old 03-31-2017, 08:42 AM   #1 (permalink)
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Default Scorpion 2221-6 to much for scale?

Found a really good deal on a scorpion 2221-6. Is it way to fast for a scale build? Not enough torque?. I was gonna use it in 450 size helicopters like blade and align.. Should a guy be looking more at a -8 or -10 motor? It would probably be used on 4 or 5 blade heads.
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Old 03-31-2017, 08:06 PM   #2 (permalink)
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Answer found....Overkill!!!
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Old 04-01-2017, 03:47 AM   #3 (permalink)
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Waaaaaay overkill A 4400kV motor - holy dooley.

You would probably want to run around 2000-2100rpm for a multiblade 450, and even a -8 is really too fast for that unless you have an active freewheeling ESC.

Remember that scale flying does not use a lot of power, so even a basic 450 motor will have enough power. You probably will only need around 150-180W of power to fly scale FF.

Colin
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Old 04-01-2017, 04:17 AM   #4 (permalink)
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The kv is overkill but the wattage is pretty sad by today's standards.

I'm not familiar with needs for scale or multi blade helis but the 2221-8 runs less continuous watts than the motor in my 2 blade, 255mm 300 class. It's running a 545w continuous which is even higher than the 2221-6.

You might want to have a look at something like this.

[ame="http://www.ebay.com/itm/like/121953932291?lpid=82&chn=ps&ul_ref=http%253A%252F% 252Frover.ebay.com%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmtid%253D1588%2526kwid%253D1%2526crlp% 253D183016357862_324272%2526itemid%253D12195393229 1%2526targetid%253D340520969927%2526rpc%253D0.11%2 526rpc_upld_id%253D115967%2526device%253Dm%2526mpr e%253Dhttp%25253A%25252F%25252Fwww.ebay.com%25252F ulk%25252Fitm%25252Flike%25252F121953932291%25253F lpid%25253D82%252526chn%25253Dps%2526adtype%253Dpl a%2526googleloc%253D1015163%2526poi%253D%2526campa ignid%253D764892186%2526adgroupid%253D39783961149% 2526rlsatarget%253Dpla-340520969927%2526gclid%253DCPCzm4XzgtMCFZC4wAodNr8 ELQ%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D1193379022979&ul_noapp=true"]LYX8007 Lynx Heli EOX 2222 3/4S Motor (3900Kv) | eBay[/ame]

Cheaper and 300+ extra watts of power at only 3 more amps than the 2221-6. More oomph per amp to be able to drive that multi blade head without bogging/straining and more efficiently.

The Lynx motors are fantastic and don't require the oiling every few flights the Scorpions do.

Just a thought anyway. May not be necessary for cruising around scale style but if you ever wanted to do some basic elevator flips or even some hard pitch pumps you'll appreciate the extra power

Just use the appropriate size pinion for low hs putting
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Old 04-01-2017, 06:06 AM   #5 (permalink)
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Quote:
Originally Posted by Andy01 View Post
Waaaaaay overkill A 4400kV motor - holy dooley.

You would probably want to run around 2000-2100rpm for a multiblade 450, and even a -8 is really too fast for that unless you have an active freewheeling ESC.

Remember that scale flying does not use a lot of power, so even a basic 450 motor will have enough power. You probably will only need around 150-180W of power to fly scale FF.

Colin
Very interesting, had no idea you guys used such weak motors. Can understand the low kv but figured you would need a decent amount of power to cope with a heavy fuselage and multi blade heads. Guess you don't need it for wind since the extra weight probably takes care of that.

Learn something new everyday poking around this site

I find scale flight extremely boring but the helis themselves and the amazing detail, paint schemes, lights, ect you guys put on them are too cool for words. Absolutely love seeing them.
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Old 04-01-2017, 11:31 AM   #6 (permalink)
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Although my Agusta A109 is more of a hanger queen today, it flew very nicely with a Scorpion 2221-12 2580kv motor. There are some motors that have 30% more power but will be a bit harder to find gearing that will work with them. There might be some 6s motors with the correct gearing from the slanted style mains and pinions that will get the rpms down to a sedate range but I don't know them very well. Mine is the old 150T main and I think it has a 13t pinion so with a four blade head, it lifts the little piglet with very little trouble. I am using the weighted plastic scale blades and with the 3GX (I still can't believe it hasn't given up the ghost) system, it flies very nicely. Good luck.

Don
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Old 04-02-2017, 03:29 AM   #7 (permalink)
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Quote:
Originally Posted by learnedthehardway View Post
You might want to have a look at something like this.

LYX8007 Lynx Heli EOX 2222 3/4S Motor (3900Kv) | eBay

Just use the appropriate size pinion for low hs putting
Still miles too fast - something like Don's 2580kV is more appropriate. Even an 11T pinion would be too fast.

Quote:
Originally Posted by learnedthehardway View Post
Very interesting, had no idea you guys used such weak motors. Can understand the low kv but figured you would need a decent amount of power to cope with a heavy fuselage and multi blade heads. Guess you don't need it for wind since the extra weight probably takes care of that.

Learn something new everyday poking around this site

I find scale flight extremely boring but the helis themselves and the amazing detail, paint schemes, lights, ect you guys put on them are too cool for words. Absolutely love seeing them.
Generally the motors for scale are not low powered because the determining factor in choosing a motor for scale is almost always the low kV, and the power is what it is.

Because power consumption is a square of velocity, just slowing the blade speed right down reduces the power consumption a lot straight up. Combine that with normally gentle flying where rapid response is seldom required, and low power draws are common. Usually around 50W per pound of weight is a good rule of thumb, so a 4 lb 450 sized heli (quite heavy for a 450) would require about 200W for FF, around 230-250W to hover, and maybe 350-400W to get out of a bad Oh $hit moment - this would be the top end for a 450.

Most people think that because scale helis are heavy, a massive motor is required - not so. BTW the wind affect on a scale heli is usually worse than on a pod and boom because of the larger sail area of the fuselage.

Colin
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