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Old Aug 22, 2012, 03:06 PM
sarge566 is offline
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I just purchased a Great Planes PBY, and it calls for to rimfire 28-30-950. I looked at the price an WOW. Is there a lower priced motor and who makes them?
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Old Aug 22, 2012, 03:17 PM
Swen is offline
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Yes. Search for Suppo 2212-15. Dr. Kiwi tested and posted the results here on RCG. Cheap but good motors. I have a lot of motors, including Hacker, Axi, Hyperion, Scorpion, Mega, E-Flite etc. and also Suppo, in fact I have more Suppo motors than others and can confirm it is a good motor.
Old Aug 22, 2012, 03:24 PM
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A pair of these motors will do you fine. I think the Rimfire motors use a nonstandard 120-degree bolt pattern and I suspect Great Planes in their infinite marketing wisdom will have set up the Catalina to accept that bolt pattern, but drilling new holes is pretty simple.

For an even cheaper option, these will also do it.
Old Aug 22, 2012, 03:26 PM
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Hehehe, Swen beat me to it. The BP motors in my link are actually Suppo 2212/13s rather than the 15s he suggested, but the RCTimers are essentially identical to the Suppo 2212/15. Either one will work; the slight Kv difference won't make a big impact.

Great minds think alike
Old Aug 22, 2012, 03:40 PM
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Thanks guys, I see that there's a real big price difference. This is one of the things I like about this site......all the help that you can get. another question, GP says to use Futaba servo's 2-S3103 and 2 S3110, is there other servo's that would work with a Futaba transmitter and receiver?
Old Aug 22, 2012, 03:49 PM
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GP will tell you to use what they sell. Any servo will work with any Tx and Rx apart from the very new and very expensive Futaba S-Bus system, but even that is possible. Yours will most probable not be s-bus, unless you paid like $2000 for the radio.
Old Aug 22, 2012, 03:58 PM
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No, Swen I only have a Futaba 6ex transmitter. It uses the fasst receiver. I beleive it said to use a micro receiver and the two micro mini, oops four micro mini servo's.
Old Aug 23, 2012, 05:31 AM
rafe_b is offline
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I'm not familiar with the PBY plane in question but I've seen where Great Planes (in the case of the small Seawind EP) supplies a motor mount with a hole pattern that is very specific to Rimfire motors. So you may end up having to mod the motor mount a bit.

I've had generally good luck with Suppo motors from BP... but recently had one fail. I'm blaming the Mystery ESC for killing the motor, but who knows...
Old Aug 23, 2012, 08:52 AM
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I have 3 of those exact motors... bought them before I discovered hobby king and other cheap suppliers. They're great motors that have had the honor of powering several planes over the last 5 years, and with a fuel plane background, $50 for a motor pales compared to the price of most glow engines. Sometimes it's nice to buy exactly what they recommend for a plane so that it goes together exactly as they intended.

However, there are a lot of good substitutes in this thread and modifying the firewall a little to save a chunk of change is no biggie.
Old Aug 23, 2012, 11:04 AM
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I also recommend Suppo motors where maximum power is not the quest but a good, reliable and efficient motor is required. I have various different brands and my biggest (30%) and most expensive planes run on Axi motors (5kW +), but for a lot of my fun planes I use Suppo. In fact, I have 21 Suppo motors. I did not use all of them yet, but never had a motor failure. The one 2212 I rewinded for more power and push more than 500 watt through a 50 gram motor. I did dinamometer tests on some of it and it is more efficient than most the expensive brand named motors.
Old Aug 23, 2012, 12:46 PM
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more "Suppo" motors here:
http://www.graysonhobby.com/catalog/...cs-c-9_36.html

There's a couple of other vendors that sell them in other aliases.
Old Aug 23, 2012, 01:10 PM
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Almost any servos will work with the Futaba (or any other) transmitters. About 35-40 gram servos are "regular" size. 30 gram servos are light. Both analog and digital servos are available for about $8 each on the web. servocity, leadershobby, hobbypartz.


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