Hello team - for a long range 4s/5s build - which of these motors would you choose and why? how would they differ in flight ?

2306/1950kv or 2305/1950kv or 2207/1950 kv?

For what blade size and pitch?

(19-Apr-2020, 06:30 PM)Krohsis Wrote: For what blade size and pitch?

Avan 6x3.8x2 Long Range Bi-Blade

(19-Apr-2020, 06:42 PM)BigBeard Wrote: Avan 6x3.8x2 Long Range Bi-Blade

Any of those would be fine.  More diameter and more height on the rotors, the first 2 numbers, means more felt torque for a given KV.  

For long range you want lower KV as that is more efficient.  From there pic the size of the motor based on the amount of work the motor is doing.  A 6" blade doesn't turn as hard as a 7" for obvious reasons, both inertia and centrifugal force.  More pitch works the motor harder as it takes a bigger bite of the air.  You can tell if a motor is working too hard by it's performance and how warm it gets.  You don't want the motor any bigger than necessary for cost and weight reasons, etc.  But going too small can bite you too.

For the blades you are using, relative low pitch, any of those motors would work, particularly if you plan to cruise and not much hot dogging.  But if the cost is close, I would tend to go with the 23XX motors, as there really isn't a negative doing so.  They are so close it really is splitting hairs.

(19-Apr-2020, 06:57 PM)Krohsis Wrote: Any of those would be fine.  More diameter and more height on the rotors, the first 2 numbers, means more felt torque for a given KV.  

For long range you want lower KV as that is more efficient.  From there pic the size of the motor based on the amount of work the motor is doing.  A 6" blade doesn't turn as hard as a 7" for obvious reasons, both inertia and centrifugal force.  More pitch works the motor harder as it takes a bigger bite of the air.  You can tell if a motor is working too hard by it's performance and how warm it gets.  You don't want the motor any bigger than necessary for cost and weight reasons, etc.  But going too small can bite you too.

For the blades you are using, relative low pitch, any of those motors would work, particularly if you plan to cruise and not much hot dogging.  But if the cost is close, I would tend to go with the 23XX motors, as there really isn't a negative doing so.  They are so close it really is splitting hairs.

For mountain surfing and more fluid freestyle then, you don't think it'd matter much ?

(19-Apr-2020, 08:06 PM)BigBeard Wrote: For mountain surfing and more fluid freestyle then, you don't think it'd matter much ?

Not really, but I would default to the 23xx.