Sunnysky x2204 1480kv question.

U

Umbra

Active Member
Heyo guys. This motor is rated for 7 to 9 inch props, but I see its 7inch prop test was done with a 7035 prop (260 grams lift). What would happen if I use this motor with a 6 inch prop, but... with a 50 degree pitch? (6050)

I think it would perform perhaps as if it had the 7 inch prop on (alsp around 260 grams lift without overworking the motor?)

Lol, yeh perhaps its a silly question... either way, I really like the motor, and I might just buy it anyway to play around with in my builds... its cheap, so...

Edit: perhaps the 1800 or 1900kv variants would be more suited for 6 and 7 inch props?
 
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Hi the different in prop size and pitch will make it slow to lift off or it rocket off the deck , it can make the motor run hot if pitch is to high and that's a large jump from 3.5 to 5.0 degs
 
holtneil said:
that's a large jump from 3.5 to 5.0 degs
Click to expand...

But on a smaller prop ....
It's an interesting question though, one could assume a smaller prop with higher pitch might be roughly equivalent to
a larger prop with less pitch but, of course, it's never quite that simple.
 
Rick M said:
I think the higher pitch is also likely to increase vibration.
Click to expand...

Unless balanced... right? Im still new to vibration stuff, lol

... and yeah, somethings never quite easy.. not in the way you expect it atlease, but meh... will see how stuff turns out... still curious though.
 
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holtneil said:
Hi the different in prop size and pitch will make it slow to lift off or it rocket off the deck , it can make the motor run hot if pitch is to high and that's a large jump from 3.5 to 5.0 degs
Click to expand...

yeah, but since the motor is made for 7-9 inch props and I might run 6 inch, perhaps the steeper pitch would simulate a 7 or 8 inch? I want to use the motor because of its efficiency over the normal 2300kv motors but im limited to 6 inch props :/

If a highr pitc wont work, why not just get a 6 inch prop with 3 blades instead? Less efficient, but wouldnt the efficiency of the motor still outdo the slight prop inefficiency and still increase my flight time a minute or a few (relaxed flying)
 
Bull nose prop would be better at any size .If you go tri blade you normally drop an inch in size , if you fit a duct around the prop and this will make it more efficient too ( any prop)
Normally a high kv motor runs a small prop due to its lack of torque , if you fit a bigger prop the motor can struggle to change rpm
Low kv motor and spin very big prop and pitch due to its bigger torque but can wallow if flight due to slow rpm changes
 
holtneil said:
Bull nose prop would be better at any size .If you go tri blade you normally drop an inch in size , if you fit a duct around the prop and this will make it more efficient too ( any prop)
Normally a high kv motor runs a small prop due to its lack of torque , if you fit a bigger prop the motor can struggle to change rpm
Low kv motor and spin very big prop and pitch due to its bigger torque but can wallow if flight due to slow rpm changes
Click to expand...

:rolleyes: ... A resounding "Yep !" on all five points made :D
 
holtneil said:
Bull nose prop would be better at any size .If you go tri blade you normally drop an inch in size , if you fit a duct around the prop and this will make it more efficient too ( any prop)
Normally a high kv motor runs a small prop due to its lack of torque , if you fit a bigger prop the motor can struggle to change rpm
Low kv motor and spin very big prop and pitch due to its bigger torque but can wallow if flight due to slow rpm changes
Click to expand...

Well, yeah, bht that just echoes points I already understand. My question was if I can run 6 inch props on a motor that was rated for8 inch props bh adding a blade and using a steeper pitch, lol.

Since however you said thay if I went with a tri nlade it would drop an inch, I think then that 6 inch tri blade would work... thanks for the info :)
 
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