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Wots Wot pilots electric power?

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Vinegar Dave31/05/2015 21:43:46
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OK i am going for an electric wots wot. I am thinking of a G110 ( 295kv) from hobbyking with a 80esc running on a 6S 5000mha. firing a 13 X 6 prop

That maybe a bit OTT but looks good on paper but will it fit...help me out here guys

Geoff Sleath31/05/2015 22:09:57
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2552 forum posts
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Not looked into it in a lot of detail but at first thought it looks a bit heavy and more than you need to swing a 13x6. My recent electric conversion with a motor with a kv of 755 will swing a 13x6.5 but draws just over 60 amps from a 4S 3600 LiPo. That was too much for the motor (max I is 50 amps for 30 seconds). The 4s 3600 maH pack weighs 450 grams (nearly 1 lb) IIRC. Your 6S will be getting on for double that at a guess. My model weighs just shy of 6lbs ready to fly and seems OK with a 12x8 at 9k rpm (only flown it twice).. How heavy do you think the Wots Wot will be?

Geoff

Biggles' Elder Brother - Moderator31/05/2015 23:18:37
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My Wots Wot electric set up is:

1. An AXI 4120/20 Gold Line - expensive yes, but a lovely bit of kit that will last you years.

2. The ESC is a 70A Black Mantis.

3. The battery is a 6s 3000mAh

4. On the prop I have gone bigger than the recommended, at a 14x6.

That gives me excellent performance - take off at half throttle. Scale aeros no problem. Not quite unlimited vertical but pretty close! Flight times - 9 mins easy, 10mins if you don't do too many verticals!

BEB

Neil Middlemiss19/12/2015 23:52:06
1 forum posts

My Wots Wot electric setup is:-

Redback .61 package from Hobby Headquarters in Sydney.

Which is a 4250/06 650kv brushless out runner with a 60 amp esc running on 5S with a 14x7e APC prop.

The vertical performance is amazing. Overall flight performance is great.

Old Geezer20/12/2015 15:58:55
501 forum posts

I have a 4120/14 out of a deceased Wot4 and some 3S 3300 packs - I have a 70 amp esc to complete the set-up - looks like I've found a home for them all!

Frank Skilbeck20/12/2015 17:16:13
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3974 forum posts
95 photos

Dave, as you will see from the comments above a 295kv motor will need a bigger prop than a 13 x 6 to produce any real power on a 6s battery, you'd be better off with a motor in the 500-600 kv range on a 6s. Running the G110 with a 13 x 6 on a 6s battery will give you around 10amps/200watts at W.O.T., great for taxying around wink, the G110 would need a 17 x 10 to get above 700 watts (35 amps) a 13 x 6 on a 600 kv motor and 6s would give over 900 watts.

Jon Laughton21/12/2015 08:05:04
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1056 forum posts
86 photos

My set up: 6S 4300 mAh with an emax motor, 80A ESC and 14x6 wooden prop

The battery is a tight fit but does go in....and on this set up the performance is pretty hot!

I have also fitted a carbon copy u/c with more forward sweep to help take offs...

Jon

Bob Cotsford16/05/2018 11:54:39
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7162 forum posts
405 photos

I'm converting my Wots wot ARTF to electric power, are there any changes in thinking on power and battery installation in the light of experience? I've ordered the electric fittings kit to simplify things.

I have just liberated the power train from an E-Flite Splendor so I have a BL50 525kv motor, roughly 4656 sized and rated at 56A (odd number I know) with a 60A (75A burst, 5v5A switched bec) E-Flite speed control which I was running on 6S with a 14*7 APC-E. Battery wise I have a variety from 3700 to 5000mAh. How does that all stack up?

ps - if anyone is putting a kit together and would like a nice pre-cut cowl to suite a sidewinder four stroke I'm up for swapping mine + cash for an uncut cowl.

Chris Walby16/05/2018 14:23:38
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447 forum posts
68 photos

V Dave, don't do it !! IMHO its a very low KV motor and I think you will have to swing a big diameter/ pitchy prop to get the performance you want.

Mine set up is

Motor Dynamic 5055 680KV 1280W 80A, 80 ESC, prop 14x8.5 (85% max load) on 5S4500

Will climb vertical and flies a treat

PS from my testing for a 320KV on 5S on a 16 x 10 three blade (the biggest I have!) gave me 37A and 3.1Kg static thrust + will look like a windmill !

PPS - Again from experience there is a flaw with the battery try retaining method....but an easy fix.

Bob Cotsford16/05/2018 15:09:30
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7162 forum posts
405 photos

525kv too low? It ain't that much lower than your motor! The Splendor is a fully aerobatic foamy and I shouldn't have thought the 1000W power train would really be that wimpy. In real terms that's 1.3hp, a healthy 60 2s or 90 4s on a real world prop. Theoretical 10k rpm and the 14*7 pulled the Splendor around 'with gusto' as they say.

I have a 430kv motor in my Curare turning a 12*10 on 6s, that's not exactly a slouch either.

Right, your answering the first post from 2015. How about my proposed setup?wink Mods to the supplied electric kit?

Tomtom3916/05/2018 15:14:48
656 forum posts

Hello Bob. No real issues re the electric conversion kit from Ripmax. Mounts were fine but you may need to tailor to your motor for fit. I'm using the standard Ripmax bits, with exception of having to widen the hatch area to fit my 6s 5000's . Worth making a copy of the battery tray as easily misplaced . I changed the captive bolt to 6mm (only because i had loads of  nylon screw/bolts . Had two so far and both have been firm favorites.

Edited By Tomtom39 on 16/05/2018 15:21:52

Tomtom3916/05/2018 15:26:06
656 forum posts

Just been looking at your proposed motor . Cant see much info on the net on it. I'm using the Eflite Power 60 470KV on 16x8 APCE . Pulls about 1300W on sub 75 amps. Let me know if you want pics etc (I cant seem to upload those but could email them to you )

Biggles' Elder Brother - Moderator16/05/2018 15:31:28
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Its a while ago now, but I don't recall having any issues with implementing the electric set up I describe above.

Operationally it has proved fine - I know some don't like the battery retraint method - but I have no problem with it. Basically I built two extra trays (copying the first) and three batteries are perminantly allocated to this model, taped onto those trays. I change the tape every couple of months that's all.

BEB

Edited By Biggles' Elder Brother - Moderator on 16/05/2018 15:32:06

Bob Cotsford16/05/2018 15:41:35
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7162 forum posts
405 photos

Taj, the 50 is a step down, would you say the 60 setup has more than enough power? Seeing as these models fly on a 46 ic, I'm hoping it will suit my more relaxed flying style of late.

David, good idea, I'm sure I have plenty of liteply in stock. The packs that were Splendor specific should do the trick for this - I hope!

Tomtom3916/05/2018 15:54:19
656 forum posts

60 will nearly prop hang on the 6 S . Ive actually flown mine off the ground and carried out some pretty basic aero's on a duff motor . Which having stuck it on the watt meter was reading 35W per lb! So to answer your question . I don't think you will have too much of an issue with a .46 . It should give you all the fun with slow grace . Might even go vertical ! wink Take care.

Tomtom3916/05/2018 16:00:03
656 forum posts

Bob sent you PM

Bob Cotsford16/05/2018 17:21:29
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7162 forum posts
405 photos

Thanks, I'm just getting ready to take my ancient Dad out for a 93rd birthday meal, I'll reply later.

Chris Walby16/05/2018 17:41:37
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447 forum posts
68 photos

Its a while ago now, but I don't recall having any issues with implementing the electric set up I describe above.

Operationally it has proved fine - I know some don't like the battery retraint method - but I have no problem with it. Basically I built two extra trays (copying the first) and three batteries are perminantly allocated to this model, taped onto those trays. I change the tape every couple of months that's all.

BEB

IMHO I have to beg to differ, as standard the banjo style hole and nylon screw is a accident waiting to happen as it will only be a matter of time before it will come loose and the battery fall out (been there, had that).

The mod is simple and does not affect the original design so you can make a couple in case you loose one, just far better than major rebuilding in my book

.ww battery plug.jpg

Biggles' Elder Brother - Moderator16/05/2018 18:03:50
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15143 forum posts
1407 photos

Well of course one of the beauties of this hobby is the independence it permits; "your aeroplane, your rules"!

Obviously that's fine, but I can only report as I have found - after literally hundreds of flights with this model I have never had the slightest cause to doubt the retention system. Never once, as far as I can recollect, have I even found the screw to be slightly lose.

BEB

Bob Cotsford19/05/2018 21:44:48
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7162 forum posts
405 photos

The deed is almost done. The supplied standoffs were twice as long as I needed, luckily I had a set of 35mm ones left over from my petrol model period and those were just right. Of course I had to drill the alloy adaptor plate to suit my motor but otherwise it went together easily enough.

I did add a 1/8" ply doubler under the battery tray to give the captive nut a bit more to bite on. I swapped the captive nut for a 5mm one and used a 5mm nylon thumbscrew to lock the battery plate. All I need do now is make a couple of extra battery plates. If I make some clones of the tray setup I can standardise on it for 6S models. At the moment that's just the Curare but it seems as good a system as any. I haven't tried balancing it with a battery in place but I suspect that I will get away with little or no lead needed.

As for the cowl, clubmate Eddy has promised me his uncut spare one, nice one Eddy!

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