I got the dual tail motor assembly all installed and working. It was very easy to do once I got the stock tail off

With this setup, I have to put my TP 1320 lipo as far forward as the canopy will allow before it will balance. I started to remove it, and shorten the tail boom a bit, but decided not to. I am planning to get a CNC head unit soon, and it is a little heavier than stock. If it is still hard to balance once I get the CNC head on it, I will trim down the boom at that time...


I took it out and hovered it for 10 minutes straight after a few adjustments to the proportional pot on the 4 in 1. This tail has easily twice the 'holding power' of a stock, single motor. The difference is amazing. Also, after about 10 mins, the tail motors were only a little warm to the touch

When I first tried to fly it, I found that I had to push the rudder trim full left, and still hold about 1/4 left rudder stick to hold the tail in one place. I had to crank the pot about 1/4 turn counter clockwise to get it to fly with the trim centered. This is presumably because the tail is much more powerful now, so less input is needed in the mix.

So, my first impression is a big ol' thumbs up for this mod! I will post again after I've had the chance to spend some quality time with it...


I took a few quick pics of it. You will probably notice that I also added a 3a fuse to the tail motors. I also added a 7.5a fuse to the main motor, but you can't see it in these pics obviously. They should save the 4 in 1 if things go badly

Very nice indeed. The only thing I hate about that setup is the plastic gear. I just find it so cheap and flimsy. Actually a bit cheaper than it really needs to be. Did they recommend adding a fuse or is that just something you wanted to do for safety??

No, the fuse was my idea. After all the 4 in 1 burnouts I've read about, it surprises me that they didn't put fuses on the motors from the factory. I guess they were worried about weight, but these mini fuses are very light.

I've had a chance to fly with the new dual motor tail, and I like it more every time! The motors barely get warm, even with no heat sinks, and it has LOTS of power. It will spin around 360° to the right in the blink of an eye

It seems to hold the tail much steader during fast vertical climbs also...

That little bit of extra weight out on the boom is a problem, tho... It's very hard to get it balanced even with a 1320mah battery. I am probably going to shorten the boom a bit once I get my new CNC head on it

i did the dual motor conversion over the weekend - and being tight i made a mount out of thin ally
save yurself 10bucks get into the modelling spirit!
i agree with everything people have said - this has got to be up there with the 'best mods for the blade'
true the battery has to be pushed forward but tail 'twitch' has gone and figure of eights are now a
pleasure!

I think I may order that in a week or two. It sounds about as good as I could hope for!

Do it! You won't be sorry... Anyone running a 3S lipo NEEDS this (or a comparable) mod.

I'm really curious to see how long the dual motors last. Before, after about 3 or 4 flights, I could tell the motor was starting to get weak. By the 10th. flight, it would barely run any longer. The dual motors still feel exactly the same as the day I put them in, and they have about 5 flights on them now...


When I did this mod, longevity was really my only goal, but I have found that the performance boost is awesome! I would hate to have to go back to a single motor tail now. I doubt I could hold it steady after being spoiled by the dual

I decided I am going to try the DD tail. So I bought GWS p/n EHS-12 heat sink, p/n H001-FD5002030B tail rotor blade, p/n EDP-50/H, and p/n HAS-002 tail fin. It will be a couple of days before I can put it togeather. I'll report back what I think.

Cool, another DD conversion to compare. I actually started putting mine on last night so Im hoping to start testing it out tonight. The size of the tail rotor really makes me wonder, but because its DD it just may work OK. The first sign of SUCKING and Im going duals with CT420.

Well I got on the DD tail today and ran 2 battery packs through it. The main thing I like about it is the length of the rotor. Its approx 1 inch shorter than the stock 1 so I think it may just be high enough to land and take off in grass.
I find it still gets pretty warm though. Its fairly hot to touch after a battery. Im thinking about buying a cheap thermometer that you just point at the motor to take a reading.
For the size of the prop Im quite impressed with the authority this new setup shows. The 2 batteries I went through in my basement in a 4x4 area since Im still learning so I dont have any feedback on what its like in FF etc but so far in hovering Im quite impressed.
Im now keeping track of how many batteries I put through this tail B4 it burns out so it may take a little while to have a result on longevity.
But so far so good. I think its a definitie step up from the stock tail.

Sounds good. I have seen positive reports about the DD setup as well as dual. I'm sure that either is going to be MUCH better than the stock setup. I will be very curious to see how long the motors last...

At some point in the future, I want to try the ducted fan tail mod also, because that looks too sweet! It will probably be quite a while, if ever, before I try it out, tho...

My stupid tail motor started it's typical signs that it's burning out on me today so it'll be needing a replacement soon. I think I'll probably get the dual tail motor mod at the same time as I replace the motor. It'll have to wait a little bit though... My current motor should last a little longer though.

Well Ive gone through 5 battery packs now (11.1V Lipo) using the new DD tail motor and its still holding up. I hovered a pack though it tonight and it seems to be about as hot as the main motor. Like I said before the DD is a step up from the stock motor for sure.
The 1 problem I have with it is that theres 2 small hex screws that hold the collar onto the shaft that I cant find a hex wrench for. It must be approxamately 1 sixteenth of an inch but I dont know for sure. Maybe a computer shop or radio shack will carry this. My LHS doesnt have 1 that small.. If anyone knows where I can find it lemme know plz.

Ive now hovered 9 packs through my new DD tail motor and its still sounding pretty good. No noticable loss of power, no glitching or unexplained noises etc. Im still pretty happy with this setup so far. When I bought the tail motor it already had 2 leads from it with a small JST like connector on it So I then soldered the opposite end onto the wires from the 4 in 1 onto this and I can simply plug in and unplug motors when I change them out. All in all I still think this is a step up from stock.

ct420 With your tail motors wired in parallel you are essentially adding twice the load of a single motor to your esc, if it wasn't for the lightened load your 4 in 1 would burn out very fast so its good that you have a fuse. A definite benefit of having the motors in parallel that I'm not sure you've realized yet is that you will be able to land your heli if one of the motors blows. Pretty much the only thing I would do to you mod is move the fuse towards the middle of the heli to balance it out a bit more.

Does anyone have pictures of the ducted tail mod? I'm really interested in seeing it.

I actually seen it yesterday. Not in use, just on the net somewhere and it looked pretty cool. Ill see if I can find it again and Ill post the site if I do.

Actually, no this is incorrect. It is not double the current load since each motor has less kinetic load on it. The current draw during normal flight is about the same (or even a little less) than with a single motor. It is less because less energy is being wasted as heat due to less brush arcing, etc.

I do agree, however, that if the motors were to become jammed and unable to turn somehow, that the current draw would be about double that of a single motor, which could blow out the 4 in 1. Of course, even with a single motor this could burn out the 4 in 1.

I did move the fuse up under the canopy several days ago. This is much cleaner...



Also, an update on the weight of the tail motors: I bought a more accurate scale 100g (+ or - .01g), and re-weighed the tail motors. They weigh about 16.4g each with the pinion gear installed, so my original posting of 8g was way off.

As youll read in the Im so dumb post I broke the tail motor support and had to replace it. Im using the DD motor and when I set it up I used the parts listed on the site. When I went to replace it tonight however they didnt have the GWS motor support so I decided to try use the stock support. I dont know why they say to use the GWS part because stock does work. You have to VERY slightly enlarge the hole where the collar comes through and widen 1 of the screw holes and it doesnt compromise the sturdiness at all. I thikn it may even be slightly lighter as well. Im going to order a bell hiller and landing gear from helidirect and I think Im going to get the aluminum tail motor support as well because it looks so strong. Probably never have to worry about breaking it again.

Well with all the excitement of waiting for my new parts to arrive I forgot about my tail motor post. It died. Im running the DD motor and had about 11 full flights on it. I dont think it wore out though.

Last time I flew it I had a pretty good crash which involved piledriving the tail into the concrete and splitting the boom. Motor was fine before the crash and right after it was spinning jerkily. Had to even start it spinning a couple times by starting it with my finger.

I have another motor here and so Im definitely staying with the DD until I get a real good reading off it.

Well Ive tried out the DD setup and decided even though it works very well it does not solve the burning tail motor problem. All Im doing right now is hovering in my basement and the motor reaches extremely high temps.Gets so hot you dont wanna touch it for more than 2 secs. I got about 12 flights out of it and after a minor crash it quit working.
I think the life of this motor is a little longer than the stock motor but it dies pretty fast just the same.
I just ordered the CNC dual tail motor mount from HeliDirect so Im hoping itll be here next week some time. I believe the only way to get extended motor life is to go dual motors.I picked up a pair today so I can at least fly my heli till it gets here.
So even though the DD has good power and controls the tail well I dont think it has the life span needed.

Its hit and mis with the GWS DD motors. My first on lasted 14 hours...the second lasted just under 6 hours.

I too use the OEM tail housing and simply dremmel the motor seat round (flat sided) and elongate on bolt hole. works like a charm and is much more robust than that GWS tail motor mount and fins (break if you look at them funny).

I was using the eflite 2 in 1 esc/mixer to run the brushed gws tail with a brushless himax 2015 3600 main. After the second motor, I went to the feigao 12mm long can with the gws prop adaptor and a gws 4530 prop. electrifly 12a esc, GY240 gyro (hh needed for brushless tail).

No more problems.

I too love the smaller size of the DD props and find it stays out of the dirt and grass much better. If you stall a brushed motor under power, your gonna kill it or shorten the life at least.

You can buy allot of gws dd motors for the price of the brushless setup. aprox. 1/3 will be bad...