f4mnect
ok i was looking at a motor and it's specs.
http://www.headsuprc.com/servlet/the-2544/Power-Up-450-Zoom/Detail

down towards the bottom i saw this
[FONT=Times New Roman]EMP 6x3E: 34 ounces of thrust at 28 amps

EMP 6x4E:
[FONT=Times New Roman]33 ounces of thrust at 29 amps

APC 6x4E:
30 ounces of thrust at 29 amps


[FONT=Times New Roman]i know these planes are built for a 6x4 but could i use a 6x3 and what would be the issues or differences. other than 4 oz more thrust and 1 amp less draw. sounds win win to me
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bobbyperu
6x3 will work just fine. You will probably get higher top speed on 6x4.

Just buy both and decide who you like best, it's part of the fun
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f4mnect
thanks i will
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dtribby
You'll get more "grunt" from the 6x3 when you push the throttle, but your top end will suffer slightly. The 6x4 is a nice compromise between acceleration and speed.

Sent from my R5-D4 astromech droid - for as long as its motivator keeps working.
Yes, I've known that I'm "different" for some time now...
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f4mnect
very cool but i may order both there are times down low and in tight when playing, a little extra grunt is fun
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PitchRate
I like to know why there is a thrust difference between the EMP 6X4E prop and the APC 6X4E prop. They are both 6X4E.
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poormansairforce
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I like to know why there is a thrust difference between the EMP 6X4E prop and the APC 6X4E prop. They are both 6X4E.

Blade shape and profile determines how efficient it is at making thrust. EMP and APC seem to be the best all around props for how we fly. I was testing EMP 6x3 and 6x4 on a MCJv3 and got 740 gr and 700 gr respectivly and the 6x3 pulled an amp less but as dtribby noted above the top end will suffer some on the 6x3.
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F1wanabe
These high kv motors really depend on rpms to create thrust. It's like a formula 1 car. Their power comes in at 15,000 rpm. They idle at 10,000 rpm. So the only way you can get the power out is to race at 19,000 rpm - they are dogs at 10,000 rpm. Teams were pushing to get a few hundred more rpms because each additional rpm translated into more power. That's kind of how it works here.
Depending on the wattage of the motor, some motors may not have enough power to spin a 6x4 prop at a high rpm. This is the case with my zoom 400. By using a prop with less pitch like a 6x3, you can actually get more rpms out of the motor, and this can result in more thrust. Take a more powerful motor like the ntm prop drive and it can push the 6x4 fast enough so that you get more thrust out of the 6x4 than the 6x3. The apc props have more bite in the center than the emps so that, on a stronger motor you will get more thrust. But on a weaker motor, the emp with a straighter pitch may have more thrust. One note :I have found 100 % of my emp props out of balance. When they are out of balance they do not reach full rpm. Therefore, you cannot get full thrust. If you use emp props, try balancing them. If you do, you will most likely find that extra thrust the numbers show.

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f4mnect
thanks for the info
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ASD
very good way to explain it F1....NICE!!!!
Cuz tooling around is just not my style of flying. Full stick and full travel control surfaces.

http://www.youtube.com/user/DollarTreeFlyer/videos
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d300
thats always worth remembering cheers
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PitchRate
d300 - do you have a picture of you smiling to use for your avatar?
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the142
Super
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useless-thumbs
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d300 - do you have a picture of you smiling to use for your avatar?

That is him smiling - you should see him when he is angry!
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