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Old Jul 13, 2005, 11:07 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
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group order: 40mm dia,18slot laminations. Turned parts can now be ordered.

Ralph Okon (a.k.a. www.powerditto.de) is putting together a group order for 40mm. diameter, 18pole statorlaminations. A minimum order of 5000 laminations is needed to start a production run. Minimum order per person is 50. One 0.20mm lamination (NO20 iron quality) will cost 0.5. Flux ring and frontplates will probably also be available by then. Keep in mind, this is not a business for Ralph, he's in the business of curing people

More info, drawings:
http://www.powercroco.de/crocogrund.html

You can place your order here:
www.neodyme-magneten.de
-> shop
-> English flag

David Theunissen's Crocodile pages, lots of info:
http://www.flyelectric.ukgateway.net/
-> diy brushless motors
-> Crocodile motors

Ralp Okon's Crocodile pages (English & German)
www.powercroco.de

Wolfgang Mrotzek's Crocodile pages:
http://goldeneye.ethz.ch/motoren/electric/index_EN
-> Motore
-> electric engines
-> Krokodil

Infrared camera video from Wolfgang's site, 1.7MByte
http://goldeneye.ethz.ch/motoren/ele...ermokroko.mpeg

Original German thread:
http://www.rclineforum.de/forum/thre...threadid=88112

'Crocodile' subforum, in German but they don't mind posts in English:
www.rclineforum.de
-> E-Motoren, Regler & Steller
-> Projekt Crocodile



edit: added www.neodyme-magneten.de and several homepages

Vriendelijke groeten Ron van Sommeren
diy motor building tips & tricks
diy outrunner discussion group
int. E fly-in & diy outrunner meet, August 28th, Nijmegen, the Netherlands



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Last edited by Ron van Sommeren; Dec 27, 2006 at 09:59 AM.
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Old Jul 13, 2005, 12:17 PM
Good Better Best quest.
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Australia, VIC, Cranbourne East
Joined Apr 2004
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If people right click on the link and select translate it works ok.
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Old Jul 13, 2005, 12:22 PM
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Old Jul 13, 2005, 05:44 PM
foamforce pilot
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Deutschland, Schleswig-Holstein, Braak
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heya - I'm registered here

just found out

well, I tried my best to translate the page, the english version is linked on top of the german site.

yours Julian
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Old Jul 13, 2005, 08:36 PM
Lance Armstrong- 7 times!
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Madison, Wisconsin
Joined Sep 2001
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Are they really only .2 mm thick?

I'm tempted to order some. Would you be able to ship some to the US?

Thanks,
-Hans
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Old Jul 14, 2005, 12:38 AM
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Old Jul 14, 2005, 08:53 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
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@Hans/Flybike
The thinner the better: less (parasetic) eddy current losses, higher efficiency.
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Old Jul 14, 2005, 07:31 PM
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Wow.

So all 50 (not counting wrapping and maybe whatever separates them) add up to 1cm?
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Old Jul 15, 2005, 01:38 AM
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Old Jul 16, 2005, 01:28 PM
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I may have missed it but what is the size of the inside hole? (for the bearing).
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Old Jul 16, 2005, 02:56 PM
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Old Jul 16, 2005, 05:16 PM
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Ralph, have you considered a larger bore to take more robust bearings? I'm interested in swinging larger props (20-24 inches) in scale planes and it appears to me that I would have to use an 8x12mm bearing on the 'bell' end. These are at the bottom of the load range. A 16 or 18mm bore would allow 7x14 or 8x16mm bearings which can handle significantly greater loads.
Your views? Regards, David.
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Old Jul 17, 2005, 04:06 AM
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Old Jul 17, 2005, 05:14 PM
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Old Jul 18, 2005, 09:35 PM
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Ok, I just ordered the minimum number because I just don't want
to be left out. This looks like a truly exciting project. Do I need to order more?

Can you give some more details about the motor you have in mind?
I'm not really technical so I'm looking for Power converted in a way
I can understand. Will swing XX x XX prop. Is equivalent to X spec. motor
Will fly X helicopter. What kind of maximum Watts?
When will cans be available? Will there be a tutorial for this specific motor?

Thanks for the info.

Oz
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