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Honest speed question

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Old 06-19-2011, 10:11 PM
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jrowles91
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Default Honest speed question

I just bought my FIRST plane, a Hobbyzone Super Cub http://www.horizonhobby.com/Products...ProdID=HBZ7100 and was curious what brushless KV to get for slightly more speed. I know that upgrading to brushless will not only give me better performance but also bet longer run times. My options are 1020kv or 910kv. My experience in on/off road trucks tells me the higher the kv the less torque but faster spinning motor. I just don't know what's best for this plane. Any help would be fantastic. Also if you may have any pointers on anything else regarding things I should know getting into this, that'd be great.
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Old 06-20-2011, 12:13 AM
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Default RE: Honest speed question

Sure,

OK it's a cub. they are supposed to be slow.

Even though it's a slow cub you will find it's plenty fast for your first plane. I'm sure it will do over 50 MPH as is.

That plane probably has a high lift airfoil meaning that if you increase speed the lift will increase also and the plane will use it's speed to go up rather than to go fast strait.

It's better to think of ways to get more flight time, or more thrust for this type of plane than more speed.

Alot of people even go the other way and go for "how slow can I get this cub to fly?".

http://www.youtube.com/watch?v=VvSWSNDzFsw







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Old 06-20-2011, 12:17 AM
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Default RE: Honest speed question

Oh on the KV we airplane guys tent not to use that as a power jugment. We go by watts.

for your 26oz plane you'll want motor of 203 watts that weighs about 67 grams.

You select your prop for there after you find a motor.
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Old 06-20-2011, 02:23 AM
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Default RE: Honest speed question

Rimfire .10
9X6 prop
3S 11.1v
2,000mah lipo
30-40Amp ESC

30.3 oz stat thrust
59 mph prop speed
221 watts
19 amps
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Old 06-20-2011, 09:47 AM
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Default RE: Honest speed question

Well, you are right. I don't necessarily want more speed. I am just MAINLY looking for longer flight times. The motor I'm considering is 275w but it's 110g. It's a 480 size motor just like stock. Can you give a link to some plane motors or would this one suffice?
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Old 06-20-2011, 01:34 PM
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Default RE: Honest speed question


Good This is a Turnagy 35-30-1100kv It's a low price engine $18 I'm useing one in my Thermal Charger glider. They are back ordered right now. Don't order one untill they get stock in.
http://www.hobbyking.com/hobbyking/s...idProduct=3883

Better Here is the Rimefire .10 1250kv It's a nice quility engine at $54
http://www3.towerhobbies.com/cgi-bin...&I=LXLWU0&P=ML


Best This is the AXI 2808/24 1190kv Gold It's really nice like a Porsche and it cost $90
http://www.hobby-lobby.com/brushless...ueryId=1539355

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Old 06-21-2011, 03:05 PM
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Default RE: Honest speed question

An important point is that if you replace the motor with a more powerful one (more watts) your flight time will generally be reduced.

The most straightforward way to get more flight time is to increase the battery capacity (more mAh). You have to be careful, though, because a higher capacity battery may weigh more, which can also impact performance.

Everything is a tradeoff.

- Jeff
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Old 09-14-2011, 09:22 AM
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Default RE: Honest speed question

Did you make a change?  How did it work out?
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Old 09-14-2011, 11:10 AM
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Default RE: Honest speed question

I acactually sold the plane and haven't purchased another. Sorry.
ORIGINAL: aeajr

Did you make a change? How did it work out?
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