Igarashi motors for real scale speed

[Jay-Em]

A tip for those that are about true scale running ànd own an IBU 2 Pro.

The Igarashi N 2738?51 is a 12 volt 5-pole 380 type motor. It runs about 15000rpm on 12v (or a 3s LiPo)
The great thing is that its 5 poles make really slow creeping a doddle. They are super-torqy, and they are really frugal with the Amps. Even on 7.2v they run admirably, be it a tad slow. Not very useful in modern tanks.

However, on my Jagdpanther they run eerily like the real thing. (I must have watched the restored Jagdpanther demo in Trier tens of times..)

I buy them via Conrad. I believe they also sell to the UK. Sadly, You people in the America's and Oz seem to be out of luck. I haven't been able to find any webshop there that sells them.

Shame. Missed opportunity.

The snowcat/pistenraupen community swears by them. They are thé motor to use if You're upgrading the Kyosho Blizzard from "mad formula-1 snow-racer" to "convincing snowcat with plenty low rpm grunt"

By the by, Conrad also sells the 16000 rpm 7.2v version wich looks suspiciously like the standard 'high torque" motors that come with Taigen gearboxes. Be it that Taigen powdercoated them fancy black.

For us Euro's (and soon-to-be fòrmer Euro, Brit compatriots) it seemed handy to me to have some other supplier than Jamara and its JP-line. Price is about the same, €9.-

PM : Checked with Conrad . Co . Uk. Yep. They got them in stock.

[BarryC]

Is this the motor your are describing? Looking for a slow creeper as well as torque for my M1A1 Abrams.

http://www.conrad-electronic.co.uk/ce/e ... view1&rb=2

Thanks,
Barry

[Jay-Em]

Is this the motor your are describing? Looking for a slow creeper as well as torque for my M1A1 Abrams.

http://www.conrad-electronic.co.uk/ce/e ... view1&rb=2

Thanks,
Barry

Yes, exactly, that's the one. In my Kyosho Blizzard, with metal tracks, a tiller and a blade, 4.5 kg in total, it's neigh unstoppable. As long as there's grip, it'll go forward. The guys upgrading the Blizzard to almost pro-spec, love them.

In my Jagdpanther it gives that lumbering, but powerful sense, especially on 11.1v/3s. It's no speed-demon, but it feels just -i donno- "right" I guess. Even on 7.2 or 7.4 it is respectable, be it slow.

On 3s it goes about as fast as the stock Heng Long's, maybe a tàd faster, be it with múch more grunt. Sand, Grass, these motors just don't care. They feel like the longer 480-sized motors, but without the space requirements, and without the larger amp-use. 5-pol Iga's on 11.1v are really frugal compared to their long-can 480 brothers.

What I like about them even more, is how smooooth they are. None of that jerky movement that powerful 400's on 7.2 have. 5-poles are a tremendous asset if You like supple movement.

But, Yrmv. Some guys think they're not very strong, because they are not as snappy as 3 poles. That's álso the result of their smoothness, and is deceiving.

[BarryC]

Thank you!

I do not intend on doing "battle" with my tanks so I am looking for more realistic operation, being able to crawl before running is important!

Barry

[Jay-Em]

An option for us US guys may be this:
http://autotrol.com/model-230-dc-gear-motor.aspx

Seems real close and the reduction choices are pretty good for scale speeds...

Cheers!

Those are completely different motors. Those are the sc. "Coreless" motors often used in electric gizmo's in cars, pop-up gps, shove-out drink-holders, that sort of stuff.

They are not nearly as powerful as the Iga's, or the usual 380 type motors used in tanks. They áre often very small, and work well in, say, 1/24 tanks as semi-direct-drive when using conical gears so the motors can sit length-wise in the Tank.

For us tankers -until the moment tank controllers start supporting brushless as a standard- it's Mabuchi RS380SH, or If You want more torque, RS380PH ( commutator-shifted, or "advanced", so they need some tweaking to use in a tank gearbox) or RS390 i.e. "480 type" long-can 380's and its variations.

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Addendum.

Something to think about when considering 5-pole brushed motors :

The larger, 700-sized variations have been -until the advent of the outrunner brushless HP & torque monsters- The mainstay of large (1 m + ) size speedboats, because large speedboats with high-pitch hydro-props need tremendous torque to get on plane, most 3-poles get overwhelmed, and burn early. Not so with 5-poles. They excel in bottom-power, but cannot match -for the same voltage- the high rpm that 3-poles can muster. Hence the higher voltage needed for the Igarashi 5-poles to match the rpm of their 3-pole brethren.

In my hydro's and speedboats it was beercan-sized 700's (5-poles, and even 12-poles! )with massive amounts of cells to get real speed going. Think 2 x 8.4v racing packs to start, òn to 24 cells or more.. Brrrr. Mucho €€€€ or $$$$$ or £££££££

I always looked at it this way: 3-poles are gas-guzzling 2-stroke screamers, while 5-poles are fuel efficient, 4-stroke low rpm diesels with drive-shaft breaking starting torque.

Nowadays, brushless outrunners with just 2 x 7.4v laugh in the face of the elderly 700's. Speeds unheard of in the nicad-brushed days, are coming with rtr boats, out of the box, and in model-flying -apart from super scale planes- brushless outrunners consistently outperform their fuelie brethren.

(I feel really old, when considering the leaps and bounds the RC hobby has taken the last 20 years.. )