05-11-2012, 09:08 PM
If you read the conversion data for 2 to 3 then 3 to 4 blade props you will see why.
You can do the Maths on the 4 to 5S upgrade.
Generally if you up the S rating on a specific airframe with the same motor, you will need to prop down...
Droping the diameter 1" and adding 2" of pitch is never going to work.
If you want to do a proper comparison, use this:
http://www.ecalc.ch/motorcalc_e.htm
Make sure you read through and understand all the input points, do a few checks on known setups so you are happy you are using it properly. Then check you latest setup.
I use this algorithm for every plane I build now and it is right on the money.
PS: I spent 4 hours mucking around with this thing when I found it, to teach myself how to use it properly.
Gazz
You can do the Maths on the 4 to 5S upgrade.
Generally if you up the S rating on a specific airframe with the same motor, you will need to prop down...
Droping the diameter 1" and adding 2" of pitch is never going to work.
If you want to do a proper comparison, use this:
http://www.ecalc.ch/motorcalc_e.htm
Make sure you read through and understand all the input points, do a few checks on known setups so you are happy you are using it properly. Then check you latest setup.
I use this algorithm for every plane I build now and it is right on the money.
PS: I spent 4 hours mucking around with this thing when I found it, to teach myself how to use it properly.
Gazz
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