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Old Sep 11, 2010, 06:58 AM
Registered User
Grand Prairie, Texas
Joined Feb 2002
169 Posts
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Speed 300

Any recommendations on Speed 300 motor for (RBC style, 24" W/S) small parkflier Warbirds?

Thanks,
R.C.
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Old Sep 11, 2010, 08:51 AM
...design-build-fly-publish...
eye4wings's Avatar
Ware, herts. U.K.
Joined Sep 2008
3,433 Posts
All the 'speed' motors are old technology. Short service life and efficiency in the 40-50% area.
If you are just starting out on the hobby there seems little point in limiting yourself to short flight times when a small brushless motor can almost double your motor efficiency and therefore almost double your flight time on the same battery pack.
Why not have a look at the selection from Hobby King or similar budget sites?
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Old Sep 11, 2010, 11:08 AM
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Chattanooga, Tennessee, United States
Joined May 2003
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This will serve you a lot better than a heavy 300 with lousy efficiency:

http://www.hobbyking.com/hobbycity/s...idProduct=8617
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Old Sep 11, 2010, 11:25 AM
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Grand Prairie, Texas
Joined Feb 2002
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Eye4wings,

Thank you for the insight, I will follow your lead, Dr. Kiwi is right in step with you.

Dr. Kiwi,

I also appreciate the link and recommendation, I will order a few of them and give them a try.

Thanks for the help guy's, I really appreciate it!
R.C.
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Old Sep 11, 2010, 12:16 PM
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Chattanooga, Tennessee, United States
Joined May 2003
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You need to determine the best prop size for your aircraft... then choose the appropriate Kv for the Turnigy 2730 which you want to get... unlike a geared motor you can't change the ratio to suit the prop size you want... with outrunners you select the correct Kv to suit the prop and the pack (e.g. 2s or 3s) you want to use.
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Old Sep 11, 2010, 08:12 PM
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Grand Prairie, Texas
Joined Feb 2002
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Dr. Kiwi,

My thread was intended to ask for a brushless outrunner recommendation to replace a brushed speed 280/300.

However my question was hastily assembled and did not transmit my request, yet in the end, the response was just what I was looking for.

I chose Turnigy 2730 1700kv, I will pair it with a 12Amp speed controller, 2S battery and 7x6 prop for a balsa built 24" parkflier (RBC) warbird.

Thanks for the help,
R.C.
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Old Sep 12, 2010, 08:35 PM
Culper Junior
eastern pa
Joined Feb 2007
2,198 Posts
Hi R.C.
Another source for stuff is HeadsUpRC which is located in the USA. I like them 'cause all the info you need is there but in layman terms and easily understood.

Here's a link to their homepage-

http://www.headsuprc.com/servlet/StoreFront

Also have cheap shipping.

Jim
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Old Sep 14, 2010, 09:52 PM
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Grand Prairie, Texas
Joined Feb 2002
169 Posts
Jim,

I appreciate the help; I am putting together a few little 280 class park flier war birds and want to power them with a Lipo powered brushless equivalent.

Thanks again,
R.C.
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