Slow fly prop or not?
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Slow fly prop or not?
Picked up a couple of props for my 28oz. Electric yak
I chose the SF. Slow fly props. They seem thinner than the regular electric props.
Now I wonder if I choose correctly? What would be appropriate for the SF props.
I think it was a 11x4.7 prop... I figured I will be flying slow 3D ?????
Steve
I chose the SF. Slow fly props. They seem thinner than the regular electric props.
Now I wonder if I choose correctly? What would be appropriate for the SF props.
I think it was a 11x4.7 prop... I figured I will be flying slow 3D ?????
Steve
#2
RE: Slow fly prop or not?
Insufficient info on your post, but you posted again in another thread.
There you gave the rest of the information.
Switch to a standard "E" prop.
There you gave the rest of the information.
Switch to a standard "E" prop.
#3
RE: Slow fly prop or not?
This a good site to help you select the most efficient prop/ motor combination
for your application.
If your motor is not listed just use the closest KvA rating.
It has worked well for me.
http://www.s4a.ch/eflight/motorcalc_e.htm
Happy flyin', Oscar
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RE: Slow fly prop or not?
post the motor sixe and KV
I have used SF props where a slim E prop was recomended and preferred it, but it all depends on set up. post as much info as you have available
I have used SF props where a slim E prop was recomended and preferred it, but it all depends on set up. post as much info as you have available
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RE: Slow fly prop or not?
G'day
On APC's website they suggest -
Glow Props Max rpm = 190,000 / prop diameter in inches
Therefore a 10 x 6 prop has a max rpm rating of 19,000 rpm
Thin Electric and Folding Electric = 145,000 / diameter in inches
Therefore a 10 x 6 prop has a max rpm rating of 14,500 rpm
Slow fly props Max rpm = 65,000 / prop diameter in inches
Therefore a 10 x 6 prop has a max rating of 6,500 rpm.
If you are using 10 or 11 inch slow fly props, you are well outside the max rating suggested by these calcs with a 1250 kv motor which is going to try to turn the prop at about 12,500 rpm.
Cheers
Mike in Oz
On APC's website they suggest -
Glow Props Max rpm = 190,000 / prop diameter in inches
Therefore a 10 x 6 prop has a max rpm rating of 19,000 rpm
Thin Electric and Folding Electric = 145,000 / diameter in inches
Therefore a 10 x 6 prop has a max rpm rating of 14,500 rpm
Slow fly props Max rpm = 65,000 / prop diameter in inches
Therefore a 10 x 6 prop has a max rating of 6,500 rpm.
If you are using 10 or 11 inch slow fly props, you are well outside the max rating suggested by these calcs with a 1250 kv motor which is going to try to turn the prop at about 12,500 rpm.
Cheers
Mike in Oz