Aircraft Brushless motors a go go ?

[jimmiprice]

Dudes does anyone know if a brushless motor from an RC plane will work in a buggy ? It seems the choice for dedicated buggy motors are limited. Im sure that i read somewhere in the past that NEU motors where from aircraft, if so im guessing any airplane motor will work... Been looking at some turnigy brushless motors that look just the trick but does anyone know ?
Jimmi.....

[mac]

The main difference would be the kv's available,
you could look at motors designed for ducted fans
another company is similar to neu is lehner(from germany)but you will end up paying a premium for these aswell.

[Marvin]

It depends on their quality, and as mac says, the KV, and the size (which helps determine torque).

If they are low quality, mass produced ones then the torque probably won't be enough to keep up with the demands of an 1/8 buggy/truggy.

Look at motors for Heli's as they need more torque - an Align 600XL isn't too bad.

The best motors are Neus, the Castle Motors (also Neus), Hacker motors and Lehners.

[mambamax]

just be carefull if you go for the Align 600XL as some of the earlya models had a tendency to of the shafts snapping off

[Marvin]

It's unlikely any of the earlier models are left on sale by now, just get one with 5mm shaft diameter and you're fine, probably.

[jimmiprice]

Thanks for the replies fellas but as my last 8th brushless conversion (Novak HV & 4.5t Combo into an Xray XT8) lasted 1/2 a lap before bursting into flames i have decided to air on the side of caution. Maybe an aircraft motor would of worked but i didnt want to risk it.
Ive went for a 1700kv losi motor run by a Mamba V3. Im going 6s 5000mah lipos so im hoping the high volts through the lower kv motor should be great. Im after good performance and 20 mins runtime. Ill let you know how i get on.......

[niggs98]

have tried to helli motors. they worked fine but were torquey motors so had no top speed so wernt really right for the aplication. have had experience of the mamba motors and also mr helliwells neu motor. both worked faultlessly through neo and took lots of abuse

[Marvin]

As Nathan says, they are torquey motors, so the gearing must be changed, though you could also use a higher voltage Lipo (I know some people who are using about 1100kV motors with 22.2V) to counter this too.

It is a lot easier to go with the car motors though, although Neu's, Hackers, Lehners etc are all originally Heli/Plane motors anyway. Even the Castle Neu's are based on the original Neu motors, so are really heli/plane motors.

[AmiSMB]

Thanks for the replies fellas but as my last 8th brushless conversion (Novak HV & 4.5t Combo into an Xray XT8) lasted 1/2 a lap before bursting into flames i have decided to air on the side of caution. Maybe an aircraft motor would of worked but i didnt want to risk it.
Ive went for a 1700kv losi motor run by a Mamba V3. Im going 6s 5000mah lipos so im hoping the high volts through the lower kv motor should be great. Im after good performance and 20 mins runtime. Ill let you know how i get on.......

Interesting info on the Novak ;)

[PaulUpton]

If the KV rating on a motor is higher does that mean more or less power?

Thanks
Paul

[electric]

If the KV rating on a motor is higher does that mean more or less power?

Thanks
Paul
more power but more amps being drawn through your esc and out of your battery

[PaulUpton]

Thanks, ive got a Novak 5.5t HV which is 3100kv, is pretty quick, but broke the rota on it and have ordered one from the states but has been over and month and not received it yet, so looking at other possibilitys!

Paul

[Marvin]

Overall, higher kV = higher revs but lower torque than lower kV motors. That's why crawlers use 21.5T motors which have loads of torque but no revs.

[PaulUpton]

Overall, higher kV = higher revs but lower torque than lower kV motors. That's why crawlers use 21.5T motors which have loads of torque but no revs.

It takes of like a rocket, but seems to lack on top speed!!

Am looking at a Speed Passion 5.5t silver arrow motor to go in it!!

Paul

[Marvin]

It's gearing that controls overall speed and acceleration. A high kV motor geared down is theoretically going to be very similar to a low kV motor geared up. A lower kV motor will have more torque (turning power) than one of high kV.

Also, the Speed Passion motor is likely to be very similar in construction to the Novak, so will probably suffer a similar fate to the Novak you have. That's why people pay stupid money for Neu motors (about £150-200) as they have far better rotors which don't break up. This has always been a problem with the cheaper motors (especially the Feigao based ones - like Speed Passion and LRP), which also get quite very hot.

[richardmid1]

KV ratings have very little to do with power. The only reason a low Kv motor has more torque is because you run it on higher voltages. Watts determine the power of your setup (volts * amps) and also gearing.

A high kv motor on lower voltages will pull more amps than a low kv motor on higher voltages.

[dodgydiy]

i have this in a losi 8

SPECIFICATION



Stator Diameter: 30.0 mm (1.181 in)
Stator Thickness: 26.0 mm (1.024 in)
No. of Stator Arms: 12
No. of Magnet Poles: 8
Motor Wind: 6 Turn Delta
Motor Wire: 24-Strand 0.25mm
Motor Kv: 1400 RPM / Volt
No-Load Current (Io/10V): 3.33 Amps
Motor Resistance (Rm): 0.010 Ohms
Max Continuous Current: 80 Amps
Max Continuous Power : 1680 Watts
Weight: 199 Grams (7.02 oz)
Outside Diameter: 37.5 mm (1.476 in)
Shaft Diameter: 4.98 mm (0.196 in)
Body Length: 48.4 mm (1.906 in)
Overall Shaft Length: 74.2 mm (2.921 in)
Max Lipo Cell: 6s




1 x Scorpion Outrunner Brushless Motor HK30 Series 22.2V 1400Kv (HK3026-1400KV)


it is quite small, is very smooth and has very good torque but as is said earlier needs to be geared up to get good speed. i am on 22.2V, using a 15 tooth pinion on it, giving a similar top speed and acceleration as my nitro 1/8 (losi 8 w caster grenade 5 port) and really good driveability with none of the heroics of having too much power. the local track is quite small for an 1/8 so it suits it fine. when i can afford to i will probably get a proper motor, but for now and at a price of £54 it does the trick

[losi madness]

what pinion gear would you use with 2045kv and 1900kv 2200kv and 2650kv the spur gear is a 68t but for the 1900kv and 2045 i got a 54t spur for these 2 motor what pinion gears would you buy as they cost alot

[richardmid1]

Dodgydiy,

I had the 1600kv version in my Trex 500 heli, very nice motors and the 1400kv is the most powerful but the most power hungry. The bearings also require frequent lubrication. Hyperion do there own version of the Scorpion motors for the same price but the bearings are better quality.

I think a good motor to go for on 6s would be the Align 600M motor 1220kv, although it would be better suited to a truggy as it is a big motor.

[losi madness]

anybody know about gearing some motor plz

[SuperSparkSteve]

what pinion gear would you use with 2045kv and 1900kv 2200kv and 2650kv the spur gear is a 68t but for the 1900kv and 2045 i got a 54t spur for these 2 motor what pinion gears would you buy as they cost alot


You've asked this question about 20 times now!!!

I dont think anyone can help you!

Stop clogging threads up by repeating the same old crap or you'll prob end up banned......AGAIN!

[dodgydiy]

richardmid1

i use a ptfe based lubricant mixed in with bearing oil which takes care of any bearing troubles, a little costly but very good and reduces maintainence quite a lot. bit off topic but how did you get on with the trex 500, i have been learning using an eco 8 and was looking at the trex as a possible upgrade route

[hockeyhead019]

hey guys,

i know i'm like a month late on the topic, however i'd be wary of using any aircraft specific motors, both because of the kv ratings (not as significant) but the torque difference, there isn't an extreme need for torque to power planes like the torque used in cars, granted you could test gearing combination and probably work something out eventually but i think i'd stay away from it.

[dodgydiy]

hey guys,

there isn't an extreme need for torque to power planes like the torque used in cars, .


you would be amazed how much torque you need to spin a prop, i used an 8 by 4 prop to run in and get a base setup on my .21's and they do struggle a bit with what would be considered a correct size prop for them, cars require less torque and more revs due to the gearing whereas a prop requires loads of torque and lower revs as most are direct drive.