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Old Jan 19, 2012, 08:46 AM
red_z06 is offline
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plank n shankbone pilot
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Chris

That motor looks good if you can get the weight down below 35g. That is 2.3g from 44g or so target. That makes it 40.5g. Which one cell are you using? 160? That is 4.1g or so. That makes it 35-36g bird. Wow!

Anyone know what the BEC is on the AR6400LBL? if it is 5v, there should only be a marginal speed drop in the servos.



I too would like to know how that motor performs on what weight airframe.
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Old Jan 19, 2012, 01:02 PM
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I was running 120's and 160's on mine.

No idea about the BEC voltage.

Chris
Old Jan 26, 2012, 08:12 AM
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Hi Chris, I just received your 18" Yak54 kit yesterday very nice quality should be a nice step up from the UMX 300. A quick question what would be a good starting point for CG on this model.Thanks Walter
Old Jan 26, 2012, 10:53 AM
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Quote:
Originally Posted by Yogi1 View Post
Hi Chris, I just received your 18" Yak54 kit yesterday very nice quality should be a nice step up from the UMX 300. A quick question what would be a good starting point for CG on this model.Thanks Walter
Its about 1-1/2" back from the LE at the center of the wing, This is also aprox the center of the milled X's on the wing. Be sure to post some pics

Thanks
Chris
Old Jan 30, 2012, 08:24 PM
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Got mine a week ago today. Finished the build last Thursday. Today was my first decent chance to maiden. I did it outside with a slight breeze but with gusts to 10 or so.

I decided to take it to work and fly in our banquet hall. No wind! I trimmed her out on low rates and then hit high rates to have some fun! Flies great, Chris! Tight loops, knife edges, aileron rolls. I, unfortunately, had to quit early and head home. The female battery plug on my AR6400 broke. One of the wires. Oh well.

I built it with the gear on but decided to remove it for weight savings and the floor is carpet so the wire skids didn't do any good.
Old Feb 20, 2012, 08:55 AM
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I finished my 18" Yak and was able to maiden her on Friday night at our indoor fly and was quite pleased. Now we fly on a small basketball court with only about 6 feet of extra space on the sides and around 20 foot ceiling height. I was a little concerned at first because my model came out 32 grams without battery but was soon relieved to to find that this plane flys just fantastic even at a little heavy. It has an excellent speed envelope and is quite agile with out being touchy the only place you see the extra weight is in a pure prop hang hover other than that as soon as you are even slightly moving forward it feels way light with no tendency to drop a wing at all. I built it with Pacer 560 glue which is probably where the extra weight showed up.I like this stuff because it does not harden the foam and remains flexable. I'll get some pics up soon I could not be more pleased I am going to try a GWS 5x3 prop this Friday over the stock 4-Site 130x70.Yogi
Old Feb 22, 2012, 02:49 PM
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Crash & Learn
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Buddy's Bowker


Here's a pc of my buddy's bowker.These planes are just awesome little fly'ers.Stable and soooo predictable.
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Latest blog entry: New Additions to the Hanger!
Old Feb 22, 2012, 02:54 PM
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Love the paint work!
Old Feb 22, 2012, 05:00 PM
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Verry nice!
Old Feb 22, 2012, 05:55 PM
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Here are a few pictures of my Yak nothing fancy just a quick sharpie job.Yogi
Last edited by Yogi1; Apr 05, 2014 at 03:12 PM.
Old Feb 22, 2012, 07:45 PM
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Very cool Yogi, If you guys have pics of your UMX Yak's please post them

Chris
Old Feb 27, 2012, 10:21 PM
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Well it's not an 18" but i think it still deserves a spot on this thread.
https://www.rcgroups.com/forums/show...8&postcount=87
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Old Feb 28, 2012, 10:20 AM
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Quote:
Originally Posted by Greasemonkey2u View Post
Well it's not an 18" but i think it still deserves a spot on this thread.
https://www.rcgroups.com/forums/show...8&postcount=87
Thanks for posting the pics! Looks like the 22"er came out great!!

Chris
Old Feb 28, 2012, 08:55 PM
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I want a 22"er! Nice!
Old Mar 19, 2012, 02:16 AM
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Any chance this plane could be picked up as a BNF unit for under $200.00?


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