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Old 01-24-2011, 04:19 AM   #1
FlyWheel
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Cool Just downloaded MotoCalc!

Haven't had time to really dig into it, other than a quick perusal, but DAY-YAM! From what I did see it looks like a really nice program! Easy to use, just follow the step by step "questionnaire" and it gives you your data!

"Give a man a plane and he'll fly for a day.
Teach a man to build a plane and he'll fly for a lifetime"
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Old 01-24-2011, 04:21 AM   #2
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Originally Posted by FlyWheel View Post
Haven't had time to really dig into it, other than a quick perusal, but DAY-YAM! From what I did see it looks like a really nice program! Easy to use, just follow the step by step "questionnaire" and it gives you your data!
That it is. Parts I like are the motor efficiency, rate of climb, propeller pitch air velocity, flight time, and power input.

As others have noted, some of the very cheap (China) motors are not very accurate on their specified KV ratings, and so on.

I've found that this program is within about 5% or so, when using my various Hacker A class outrunner motors.
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Old 01-24-2011, 05:32 AM   #3
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Motocalc is a great tool but I agree - the data out is only as good as the data in.

Ive found that it works pretty well with name brand motors as far as predicting how a system will perform.

If your using cheep Hobby City stuff, then forget it. The listed specs are most often made up and have no basis in reality.

If you have some decent testing gear, you can come up with your own - accurate - kV, Rm, Io values for the motor your using and it works great.

I think I need a signature.
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Old 01-24-2011, 03:13 PM   #4
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Yep it's a great program, but like Larry and Kyle have said, use it as a basis only.
Actual measurements will tell you the truth, M/C is educated guessing, and sometimes there are some bugs in it.

If something doesn't look kosher to you on a set up, try using a different motor mfg. with a similar motor to see if it changes anything. There are a couple of motors that for what ever bug a boo, will go off the wall when playing with set ups.

Found one the other day, where just jumping the cell count one cell had the system go from 45 amp draw to 146 amps!!!!!!!

But like I said all in all it's a fun system to play with.

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 01-24-2011, 04:38 PM   #5
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Whar be the link?
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Old 01-25-2011, 06:31 PM   #6
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REALLY? LOL!

www.motocalc.com

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 01-25-2011, 07:16 PM   #7
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Yeah, that's what I do to if someone posts about a product and doesn't leave a link I will just type the name of the manufacturer, all lower case andnospaces then stick a .com on the end. And 90% of the time it works!

The other 10% Google gets.

"Give a man a plane and he'll fly for a day.
Teach a man to build a plane and he'll fly for a lifetime"
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Old 01-25-2011, 07:30 PM   #8
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Well I asked for it with my Captain Obvious graphic!

Thanx for posting the link!
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