I need help identifying electric motor.
11-24-2023, 07:01 AM
#1
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I need help identifying electric motor.
I am looking to find out what electric motor this is so i can know what batteries I need for it. I have never flown electric before and got this with a Sig Rascal 40 so I suppose it will fit a 40 size plane but having never messed with Electric before I need a little guidance. Thanks in advance!
11-24-2023, 10:26 AM
#2
Join Date: Sep 2002
Location: Nijmegen / Nederland
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Without a watt-meter you're in the dark ... until something starts to glow.
Motor mass is a useful indicator for a motor's power rating.
Conservative rule of thumb for max. continuous motor power:
4watt per gram motor mass.
A safe starting point.
And three straightforward methods for measuring motor velocity_konstant_Kv
www.bavaria-direct.co.za/constants (a.k.a. RCG user skylar)
Note that Kv (in rpm/volt, e-motors try to keep a constant rpm) says nothing about the maximum continuous current (in ampère) a motor can handle, nor about maximum continuous power (in watt).
However, Kv has a massive effect on actual current and power drawn, both are proportional to Kv cubed
Silly example: doubling Kv would eight-fold current and power drawn.
(IC engines try to keep a constant torque).
Prettig weekend
Ron
• Without a watt-meter you're in the dark ... until something starts to glow •
• E-flight calculators • watt-meters • diy motor tips&tricks • Cumulus MFC •
Motor mass is a useful indicator for a motor's power rating.
Conservative rule of thumb for max. continuous motor power:
4watt per gram motor mass.
A safe starting point.
And three straightforward methods for measuring motor velocity_konstant_Kv
www.bavaria-direct.co.za/constants (a.k.a. RCG user skylar)
Note that Kv (in rpm/volt, e-motors try to keep a constant rpm) says nothing about the maximum continuous current (in ampère) a motor can handle, nor about maximum continuous power (in watt).
However, Kv has a massive effect on actual current and power drawn, both are proportional to Kv cubed
Silly example: doubling Kv would eight-fold current and power drawn.
(IC engines try to keep a constant torque).
Prettig weekend
Ron• Without a watt-meter you're in the dark ... until something starts to glow •
• E-flight calculators • watt-meters • diy motor tips&tricks • Cumulus MFC •
Last edited by ron_van_sommeren; 11-25-2023 at 07:38 AM.
