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Old Jun 14, 2009, 10:12 PM
Tye
Chacotoma, NM
Joined Jan 2004
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Leon Shulman's Zomby

In the June issue of Model Aviation, page 58, Mr. Shulman offer's his plan for a blue foam Zomby. He uses an AXi 2208-34 motor together with a Jeti 8 amp ESC. The next larger Jeti is a 12 amp unit, without that much price difference. Being an electric "newbie", would it be to my advantage to select the larger 12 A. ESC ? Or .... Would the 8 A. ESC be perfectly adequate. He uses a 2 cell lipo. Is anyone else out there using a similar set-up, and any additional information for improving the system in this plane would be greatly appreciated.

Thanks for your help.

zak
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Old Jun 14, 2009, 10:28 PM
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Xpress..'s Avatar
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No harm in going up to the 12amp other than increasing weight from the larger ESC.
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Old Jun 15, 2009, 12:55 PM
Tye
Chacotoma, NM
Joined Jan 2004
706 Posts
Xpress, excellent point my friend !

Would you or any one else here, happen to know the weight differnce between the 8 amp, and the 12 amp JETI brushless ESC ? ? ?

Thanks again for your help.

> zak
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Old Jun 15, 2009, 01:09 PM
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8 amp is 7 grams:
http://www.hobby-lobby.com/advance_p..._2967_prd1.htm

12 amp is 10 grams:
http://www.hobby-lobby.com/advance_p..._2968_prd1.htm
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Old Jun 15, 2009, 04:05 PM
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Xpress..'s Avatar
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3 gram difference, not a whole lot for the zomby
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Old Jun 15, 2009, 09:14 PM
Tye
Chacotoma, NM
Joined Jan 2004
706 Posts
Thanks for your input guys.

My primary concern is knowing if the JETI 8 amp ESC is robust enough, to deal with the power surges between the AXi 2208-34 brushless motor, and a 2 cell Li-Poly battery. What do you think ?

Thanks again.

zak
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Old Jun 15, 2009, 10:17 PM
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I run a few AXI 2208/34 motors on 3S with 10x4.7 props. I have an 18 amp ESC on them. Guess I'd rather be safe than sorry. Personally, I would go with the larger one in case you ever want to step it up to a 3S lipo.

Laine.
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Old Jun 16, 2009, 03:23 PM
Tye
Chacotoma, NM
Joined Jan 2004
706 Posts
Quote:
Originally Posted by lmopar69
I run a few AXI 2208/34 motors on 3S with 10x4.7 props. I have an 18 amp ESC on them. Guess I'd rather be safe than sorry. Personally, I would go with the larger one in case you ever want to step it up to a 3S lipo.

Laine.
Thanks Laine. I think that I am going with your good advice, and buy the 18 amp unit. Would you happen to know how much heavier the 18 is over the 10 amp unit, which weighs 10 grams ? ? ?

Thanks again.

Ed
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Old Jun 16, 2009, 11:38 PM
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I dont know, but I wouldnt worry about it. If a couple grams makes any difference that you can notice, I'll be VERY surprised. Ounces, I MIGHT worry about... grams, I wouldnt pay any attention to.

Laine.
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Old Jun 17, 2009, 11:42 AM
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Go for the larger capacity ESC. It will give you more versatility for use in other/next planes. 3 grams just isn't going to matter unless you are a serious perfomance geek or a competitor.
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Old Jun 17, 2009, 02:48 PM
Tye
Chacotoma, NM
Joined Jan 2004
706 Posts
Quote:
Originally Posted by Lost_Dawg
Go for the larger capacity ESC. It will give you more versatility for use in other/next planes. 3 grams just isn't going to matter unless you are a serious perfomance geek or a competitor.
Well the Jeti 12 amp = 10 grams, and the 18 Amp = 21 grams, per the Hobby Lobby catalog, so that's an 11 gram difference ! .

So I'll need to consider that. The plane I'm considering is on page 58 of the June issue of Model Aviation. It's Leon Shumans Zomby. Please take a look at it, and tell me if it has enough wing area to handle the 18 amp Jeti ?

Thank you for your inputs.

Ed, electric newbie
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Old Jun 17, 2009, 04:57 PM
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I have looked at the Zombie in the magazine, it wont notice 11 grams. Go for the 18 man. However, I would go with a Castle Creations Thunderbird 18. I have used many of them and they work great. might be lighter too.

Laine.
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Old Jun 17, 2009, 05:09 PM
Tye
Chacotoma, NM
Joined Jan 2004
706 Posts
" I would go with a Castle Creations Thunderbird 18. "

Thanks Laine. And the AXi 2208-34 motor would work OK with the Castle Creations 18 ? ? ? Remamber, I'm a raw newbie here Sorry ! Is this a good motor ?

And what mail order company handles Castle Creations ?

zak
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Old Jun 17, 2009, 05:12 PM
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Hobby-Lobby carries them, so does Tower Hobbies, you can order direct from Castle Creations and there are many other places that have them too.

AXI's are excellent motors. I have 10 or more of them. They cost a bit more than some of the "economy" type chinese motors, but in this hobby, you pretty much get what you pay for. If something is REALLY cheap, its probably for a reason.

Pretty much any brushless ESC will work with any motor. The only real concern is voltage and amp draw.

Laine.
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Old Jun 17, 2009, 06:09 PM
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Oh, and the CC Tbird 18 is 17 grams, so its right there in the middle.

Laine.
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