Turnigy H2218 to small?

[jamespl]

I have just had 2 turnigy H2218 2500kv outrunners delivered and I was going to use them in a dragon saga twin as a replacement for the stock 380 motors. I don't have the boat yet but the motors look really small. My question is have I purchased the correct size motors for this hull?

[Diegoboy]

Your concern is in the length of the 2218 motors corrcect?

They are the same diameter as the stock motors, but are much shorter. I feel they should work. The boat is what, about 25" right?

[martin]

I assume your refering to the twin 820mm or 32" Dragon cat, If so their to small to give any speed over the original 380 2636kv motors. Martin.

[jamespl]

Yes, it's the ekos clone. I was hoping they would be the same size as the ones in the latest ekos. Looks like I will have to scrap them then!

[martin]

Those motors you have are only 450 size heli motors, You want something like a 500 size heli motor. Not sure youll find any where the kv your looking for in those though. Martin.

[jamespl]

I think the H3126 (500 size) outrunners will be too big. Could try the 2200kv versions that fightercat stocks.

[martin]

Yes the 500 outrunner motors are 37mm diam, I would think a 380 inrunner with the cooler on is 34-35mm diam. But those Venom outrunners look quite big as well. Martin.

[martin]

Those Venom outrunners are the same diam as the 450 size outrunner motors at 27.8mm diam & 42mm long. Id give the ones you have got a try, They will be a bit slower because of the lower kv but you could up the volts.

[martin]

The 450 motors that you have are 500w, Turnigy do a 450/500 600w that is the same diam as the ones you have & same diam as the Venom ones. Their also 42mm long the same as the Venom ones, But the closest ive seen kv on these is 2900kv.

[Simon.O.]

Fwiw I run Heli motors in my bigger cat. 29-33" depending on how you measure it.
I have run 500 size 1600kv Turnigy's and now have a pair of 1800 (1900?) Typhoons in there.
They are run on 5S via 100 mystery type E-bay sec's
These are the motors i have run with a lot of success
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11181

These are the motors i now will be running.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9258

This may help :thumbup1:

[martin]

Their may be issues getting these 500 size motors in on the Dragon Saga cat because of their larger diameter of 37mm. Martin.

[Diesel6401]

I think the H3126 (500 size) outrunners will be too big. Could try the 2200kv versions that fightercat stocks.

I ran the 1600kv ones on 6s in a twin HOR 32". Motivated the hull really nice, and sound wicked. I ran CF40's but it will take more prop. I planned on CF45s but sold the hull before I could try them.

[jamespl]

I might try some leopard 2850 2950kv inrunners on 3s when I get some more pennies. I just thought those outrunners would be a cheap upgrade, guess not.

[Simon.O.]

I might try some leopard 2850 2950kv inrunners on 3s when I get some more pennies. I just thought those outrunners would be a cheap upgrade, guess not.

I try not to be a thread hog but I have to say this. Outrunners are great in boats.
Not all boats and not all applications, I have a good spread of OR and IR motors through the fleet and there are some that may change soon too.

IMO if you have a good air volume like a mono or Cat then an OR can be tried and sometimes be successful.
In general riggers are not good homes to OR motors but it can be done :banana:

If you have found some well priced cans to go in there then do it. It is all about learning and having fun. ! :beerchug:

[martin]

Most of my 450 outrunners now i make a watercooled mounting plate which keeps temps down as im pushing the motors to over 42000rpm unloaded. Martin.

[jamespl]

I try not to be a thread hog but I have to say this. Outrunners are great in boats.
Not all boats and not all applications, I have a good spread of OR and IR motors through the fleet and there are some that may change soon too.

IMO if you have a good air volume like a mono or Cat then an OR can be tried and sometimes be successful.
In general riggers are not good homes to OR motors but it can be done :banana:

If you have found some well priced cans to go in there then do it. It is all about learning and having fun. ! :beerchug:

I have found that the H3126 1600kv worked really well on 5s in my venom P1 and at $20 a motor they can't be beat

[Simon.O.]

Most of my 450 outrunners now i make a watercooled mounting plate which keeps temps down as im pushing the motors to over 42000rpm unloaded. Martin.
As a 450 size I assume they are 28mm dia ? what is the rotor length on the ORs that you run


I have found that the H3126 1600kv worked really well on 5s in my venom P1 and at $20 a motor they can't be beat
What size props are you running on these motors ?

[martin]

Yes diam 28mm length 36mm, Have used 3450kv,3600kv & 3800kv all on 3s. I have also ordered a 4400kv that is 28mm x 42mm long to use also on 3s 40c. All run on Octura metal x435.

[jamespl]

As a 450 size I assume they are 28mm dia ? what is the rotor length on the ORs that you run


What size props are you running on these motors ?

On the H3126 1600kv my setup was 5s, 90a esc set to 15deg timing turning an x640 prop. It went really well.

[martin]

On the 450 im now running 30degrees timing & PWM 16KHZ. Martin.

[martin]

If you want to see my 450 motors run theirs a couple of videos, Look under Mini & micro section & 3rd down titled 15" Micro Mono Video. Martin.