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Other › logo 10 3D with orbit 25-12 - 6S2P problem
11-12-2005 01:39 PM  12 years agoPost 1
orobin

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France

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Hello,

I have this config :
Logo 10 3D
Orbit 25-10
Pinion 21 tooth
Lipo 6S2P - 4980 mA
Carbon Blade from Mikado

weight ready to flight = 2300 gr
rotor RPM = 1900 RPM, at full throttle
pitch = +9 / - 9
after 10 minute of cool aerobatic, if I measure the temperature of my motor, I obtain really big value :
outside the motor : more than 60 ° C
inside the motor (thrue the hole on the back of the motor), the wire are at 95 °C.

I think it is too much.

It seem that some people are using this motor, with succes.

do you have so high temperature also ?

thank you
Olivier

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11-12-2005 04:35 PM  12 years agoPost 2
pwkpete

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Pewaukee, WI, USA

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Does the motor have the fan installed?

Do you know if this is the newer version of the motor?

High temps were a problem with the original version...

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11-12-2005 05:34 PM  12 years agoPost 3
orobin

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France

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hello,

the motor was bought to hoellein.com, in germany, on Internet, there is few time.

there is not any fan. but I don't know if it is the new one, or not.

how can I know that ?

thank you
Olivier

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11-12-2005 06:34 PM  12 years agoPost 4
pwkpete

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Pewaukee, WI, USA

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I know they made changes, but only some have differences in KV ( http://www.plettenberg-motoren.com/Orbit25/Orbit25.htm ), not sure what the internal changes are, I heard they opened it up for better airflow. (http://www.plettenberg-motoren.com/uebersicht.htm the Orbit 30 is shown with the fan on it).

I know you can get the -14 with or without... ICare in Canada has them and the fans individually, I'm sure Hollein has them too.

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11-20-2005 10:19 PM  12 years agoPost 5
orobin

rrNovice

France

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hello,

with your advice, and with the help of the Plettenberg team, I have ordered a fan, for my motor, whihc will be fixed on the back of the motor, diretcly.

during the time I am waiting the fan, I have tested a Computer electric fan, that I have founded in a broken PC.
it reduce a little bit the temperature. it is a poossibility when you don't have a fan on you motor.

I will keep you informed when I will have tested the motor modification.
today the wheather is really cold, and I will probably have a motor with a low temperature )))

thank you for your help.
Olivier

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11-21-2005 12:40 AM  12 years agoPost 6
pwkpete

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Pewaukee, WI, USA

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Excellent, let us know how it works!

Cold here too now, time to fly inside for a few months!

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11-21-2005 09:25 PM  12 years agoPost 7
orobin

rrNovice

France

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hello,

I just reeceived today the fan for the Orbit 25/10.
quite fast, on my feeling )

I am a little bit disapointed : it is an axis, with a fan on it, but the "blade" are straight, not curved.
I ma wondering how it could put, or remove breath in the motor ???

I will test it as soon as the cheather alllow me to fly )

I keep you update )

cheers,
Olivier

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11-21-2005 10:00 PM  12 years agoPost 8
pwkpete

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Pewaukee, WI, USA

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I am no expert in airflow physics, but this is a straight bladed centrifugal fan and it's supposed to work very well and not cause much power loss... It also disperses the air, rather than forces it in a single vector...

You should see 10-20deg C improvement in temp...

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