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Acro Wot mk2 artf electric advice plz

Making a electric set up for acro wot (balsa)

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Tom Ling23/03/2016 15:44:37
48 forum posts
3 photos

Hi everyone, could anyone recommend or help me make a set up for an Acro wot mk2 please I'm going electric with it and I would like a bit of speed and vertical power.

I'm happy to go 5-6 cell and a 60-80 size speed controller as I would be able to put it in other models in the future, but I can not work out what motor to go for, Im still new to the electric side of things but I love chucking a battery in my acro wot Foam E and would now like to go a bit bigger and faster, many thanks Tom.

Biggles' Elder Brother - Moderator23/03/2016 22:10:36
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15748 forum posts
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Well Tom, no one seems to be stepping up to this one - so I'll have a go! I can't specifically advise about the AcroWot, but I can tell you the typical set up I use for a hgh performance aerobatic model of that size - in particular I'll tell you the set up I use in my Wots Wot. A similar set up would work well with the AcroWot I believe.

Motor - I'm using an AXI Goldline 4120/20 kV 465. OK, this is an expensive motor - but it is a excellent piece of kit. It will power your AcroWot and last to power two or three more models after that! But if you really don't want to spend that sort of money then something like this would be the economy choice. (although note that motor would need a 5s battery)

ESC - You'll want a 70-75Amp ESC. Something like this would do.

Battery - I use a 6s 3000mAh (will give you about 8 minutes aerobatic flying) or a 6s 5000mAh (will give you about 10-11 minutes) with my AXI set up. You could use a 5s but your current draw might be higher then.

Prop - I find that between a 14x6 and 15x10 or so gives a good range of performance on this set up. The first yields better pick up and acceleration, while the second gives higher top speeds - you pays your money etc.,..... Remember ALWAYS check with a power meter before committing to full throttle on any set up!

Hope this helps!

BEB

Edited By Biggles' Elder Brother - Moderator on 23/03/2016 22:11:56

Bob Cotsford23/03/2016 22:23:11
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8382 forum posts
463 photos

Alternately this HK SK3 is the one I've got in my .60 size Curare and it pulls that along nicely on a 12*10 or 12*12 using 6S 4000 packs. A HK 80 A esc and a separate LiFe receiver pack makes up the full kit.

AndyD23/03/2016 22:54:34
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748 forum posts
523 photos

4max do a good sport setup 5055-580 on 5s 70 a esc 14x7 prop,ive got that setup on a sebart sukhoi and a simalar setup in my 120% ballerina,plenty of power,go on his site and look under setups or customers models.

Allan Bowker24/03/2016 14:20:21
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1633 forum posts
227 photos

It's always worth looking at Andy Green's Model Database or his Electric Flight Database

There is an AcroWot MkII listed but IC and not Electric
Maybe you could contribute your final electric setup?

 

Edited By Allan Bowker on 24/03/2016 14:59:16

Chris Lee12304/06/2016 15:47:43
60 forum posts
7 photos
Tom what setup did you go with in the end? Im thinking of of getting the balsa acrowot if/ when my foam e version dies.
Tomtom3904/06/2016 16:47:01
691 forum posts
1 photos

I used the SII Scorpion 3026-890Kv with 70Amp esc in my case Hacker pro spin with 14X7 APCE prop on three cells 850 W (I used a 4500 Mah ) and on 4 cell I got just under 1100 W on 12X 6 APCE I could prop hang it . Average duration 81/2 mins with at least 30% left on batteries (less if you are a throttle jockey!)

Biggles' Elder Brother - Moderator04/06/2016 17:18:52
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15748 forum posts
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I've lieterally just finished converting an "old" IC AcroWot to electric - well last week,.

6 cell, 3000mAh, 50A ESC, OS OMA 5020-490 (over kill really but its what i had). Propped it down using a 13x5 so giving around 900W. I'm getting 10 mins mixed aerobatics with 40% left in the battery!!

BEB

Chris Lee12304/06/2016 20:04:01
60 forum posts
7 photos
I was hoping to use my heli packs which are 6s 5000, a bit heavy? Whats the biggest pack that will fit?

Edited By Chris Lee 1 on 04/06/2016 20:04:43

MattyB04/06/2016 21:42:35
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2026 forum posts
31 photos
Posted by Tomtom39 on 04/06/2016 16:47:01:

I used the SII Scorpion 3026-890Kv with 70Amp esc in my case Hacker pro spin with 14X7 APCE prop on three cells 850 W (I used a 4500 Mah ) and on 4 cell I got just under 1100 W on 12X 6 APCE I could prop hang it . Average duration 81/2 mins with at least 30% left on batteries (less if you are a throttle jockey!)

Really? Running the numbers both those setups look to be over the maximum currents (70A) for both ESC and motor. It may be ok with careful throttle management, but personally I would have gone for a higher voltage, lower Kv, lower current setup which would definitely be more efficient overall and probably be easier on your batteries in the long run.

Edited By MattyB on 04/06/2016 22:00:21

Robin Kearney05/06/2016 01:09:58
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1080 forum posts
183 photos

Hi Tom,

I've converted my ARTF Balsa Acro Wot to electric, using a Hobby King G46 motor, 15x8 prop, 5s 4000mAh pack and a 70A speed controller. I bought a ESC without a ubec, so I also have a small nimh pack to power the radio.

I get 7 or so minutes with about 30% left in the packs. Performance wise, well it used to be powered by an OS 81 Alpha four stroke, and I'd say the electric setup has more power than that.

r

Chris Lee12305/06/2016 08:41:49
60 forum posts
7 photos

Has any one got any pictures of how and where the battery goes in / out?

Jason Hyland28/07/2016 13:06:26
42 forum posts

I'd be really interested in some photo as well. I just picked up the acrowot package from 4-max, but there are zero instructions on using the EP conversion kit supplied. I guess it may be obvious to some

Chris Lee12328/07/2016 13:13:01
60 forum posts
7 photos

I'll take some tonight and see If I can upload them for you.

Although mine has been modified for larger packs.

They go in the slot you need to cut out just under the motor then, mount the tray mount inside and bolt the slider to that.

I can't use the tray as my packs are too large. The instructions for the EP kit are in the instructions for the acrowot.

Chris Lee12328/07/2016 13:15:43
60 forum posts
7 photos

http://www.ripmax.com/Instructions/a-cf006.pdf

Page 8 on the PDF or Page 16 in the manual.

Jason Hyland28/07/2016 13:24:14
42 forum posts
Posted by Chris Lee123 on 28/07/2016 13:15:43:

http://www.ripmax.com/Instructions/a-cf006.pdf

Page 8 on the PDF or Page 16 in the manual.

You beauty

Jason Hyland28/07/2016 13:25:29
42 forum posts

I can't use the tray as my packs are too large. The instructions for the EP kit are in the instructions for the acrowot.

Wot a numpty, how did I miss that

Chris Lee12328/07/2016 13:33:00
60 forum posts
7 photos

we all do it from time to time.

Jason Hyland04/08/2016 11:41:41
42 forum posts

Hi Guys,

My build is progressing but I could do with some suggestions about how to complete the battery mounting plate. I'm not entirely sure how the items A,B and C should be constructed. The manual suggests

"Glue the spacer and top plate to the mounting plate as shown – do not use excessive glue as the angled section of the battery plate must be able to slide freely in and out of the box section that has been created".

I think the top plate is "B", mounting plate is "A, and the spacer is "C" ? I think I should glue C on A then B on C, if you see what I mean?

Any suggestions ?

Thanks, Jason

Colin Carpenter04/08/2016 14:26:27
635 forum posts
35 photos

Jason. Correct. Strap battery onto tray and slide tongue down and bolt down . Simple and works fine but just ensure bolt is tight. Colin

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