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Nov 19, 2012, 07:54 AM
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United States, NC, Lawndale
Joined Mar 2008
168 Posts
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Old School Conversion Question Speed 400
Hi, I have a couple Zagis that flew on speed 400 motors with 8 cell nicads. What would be an equivalent brushless, watt and KV rating to switch over to lipo 3 cell? Inrunner may mount easier but could probably fabricate mount for outrunner as well.
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Last edited by Tabasco; Nov 19, 2012 at 08:01 AM.
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Nov 19, 2012, 10:16 AM
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Chattanooga, Tennessee, United States
Joined May 2003
26,279 Posts
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The easiest option is a 2835 inrunner of around 2200Kv which would spin a 6x4 on 3s at around 17-18A
http://www.giantshark.co.uk/keda-kb2...-p-402617.html |
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Last edited by Dr Kiwi; Nov 19, 2012 at 10:59 PM.
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Nov 19, 2012, 01:19 PM
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USA, NC, Wilmington
Joined Sep 2010
1,069 Posts
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Quote:
http://www.headsuprc.com/servlet/the...50-Zoom/Detail |
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Nov 19, 2012, 03:52 PM
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United States, NC, Lawndale
Joined Mar 2008
168 Posts
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Did a quick search for the inrunner and could not find. Hobby King is down. May go with the outrunner.
Thanks for the suggestions!!!! |
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Nov 19, 2012, 04:21 PM
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Australia, WA, Kalgoorlie
Joined Apr 2011
1,313 Posts
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Mega 16/15/4 inrunner paired with 3S Lipo of 1800-2200mAhr, 6x4 prop, around 24A. Ballistic performance guaranteed! Also check out the HET inrunners.
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Nov 19, 2012, 04:28 PM
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United States, CA, Bear Valley Springs
Joined Feb 2000
24,569 Posts
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Nov 19, 2012, 11:01 PM
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Chattanooga, Tennessee, United States
Joined May 2003
26,279 Posts
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Quote:
With a Zagi Carbon 5.1x4.9 on 4s you get 642g @ 97mph from 15.10A/207W |
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Nov 20, 2012, 12:24 AM
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United States, CA, Bear Valley Springs
Joined Feb 2000
24,569 Posts
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Make sure you install a spar!
mw |
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Nov 20, 2012, 06:05 AM
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Kingston, Canada
Joined Jun 2004
10,383 Posts
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Yep. Otherwise you might run into the deadly Zagi flap!!
 Had that happen till I put a spar in it. I think Tic had something to do with it. Gord. |
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Nov 20, 2012, 06:17 AM
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United States, NC, Lawndale
Joined Mar 2008
168 Posts
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Thanks for all the info!!
Years ago I put a fiberglass spar in when I built the Zagi so maybe nice to revive the wing. Just to save me time from waiting to get home to measure, any remember what length prop the Zagi can use? |
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Nov 20, 2012, 10:55 AM
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United States, CA, Bear Valley Springs
Joined Feb 2000
24,569 Posts
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I used a 6x4 most of the time. You can always open up the cut between the elevons but I would consider it kinda pointless with this airframe.
mw |
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Nov 20, 2012, 09:03 PM
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Canada
Joined Nov 2000
5,166 Posts
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Does one really? have to go to motors virtually as heavy as the S400.. Seems a bit much.
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Nov 20, 2012, 11:12 PM
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United States, CA, Bear Valley Springs
Joined Feb 2000
24,569 Posts
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Helps to maintain the original balance...especially if the airframe has already been built and flown.
mw |
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