Author Topic: CEM Schottel drives.  (Read 2724 times)

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speedweeder1

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CEM Schottel drives.
« on: July 02, 2016, 03:34:00 »
Hi Guys,
 I can't get hold of Cornwall model boats at the moment, reason being that I purchased a couple of drives for a tug I am building, I am just about to reassemble and fit them and had a sudden thought do they have any form of lubricant in the lower drive assembly, If not what do you suggest ?

Steve.

des

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Re: CEM Schottel drives.
« Reply #1 on: July 11, 2016, 22:08:47 »
Hi Steve

I am considering CEM050 or -070 Schottels for a project.  I've emailed them about getting dimensions & installation instructions so I can determine space requirements, both inside and below the hull, but they replied that this data is not available.  Looks like you've got to buy one or two first, then work out how to install them, or even if they'll fit.

Can you tell me if these CEM units come with brass or plastic props?

I can see from the photos that the CEM's are different from Graupner's Schottles - the mounting appears to be different, and the steering is certainly different.  Could you post a photo of these areas?

Can you tell me how much these units project both inside and below the hull.

Thanks,

Des.

2tugboats

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Re: CEM Schottel drives.
« Reply #2 on: July 20, 2016, 22:33:22 »
Thank you Steve and Des. . .I am working and studying the same drives for my tug.
I have chosen the Graupner G2335, but haven't purchased a pair yet. They are 
presented as matched for "900 motors' which I need because my tug is large scale.
Probably a little small for my application, but extremely good handling.

From what I can find, they all are plastic with stainless shafts and gears. My model's
picture shows a brass colored propeller but the promo says that all components are plastic.

I, like you, would really like to hear from some who have installed these drives.
And of course, shared photos are priceless around these docks.

Michael
Yet another case of why men and women go down to the sea in ships. . .A pleasure to be here and smell the salt air. Thank you Tugboat Forum. . .Michael in Anacortes, Washington www.twotugboats.com

Volker

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Re: CEM Schottel drives.
« Reply #3 on: July 21, 2016, 00:52:09 »
I think the Schottel drives offered by Cornwall Model Boats are from Krick:
http://www.krickshop.de/e-vendo.php?shop=krick_e&SessionId=2026x81dd5750b826c71a533404fad02b1d75&a=search&SearchStr=schottelantrieb

When you klick on a model you get to a more detailed page. Though the main page is in English the description is in German. The following dimensions are given for the CEM 040:

Schottel-Durchmesser A 40 mm hinten......= Schottel diameter A=40mm at back
größter Durchmesser B 50 mm ................= Maximum diameter B=50mm
Propeller-Durchmesser C 38 mm ..............= Propeller diameter C=38mm
Schafthöhe D 30 mm 37 mm ....................= Height of shaft D=30 mm
Höhe im Rumpf E 28 mm ..........................= Height in hull E=28mm
Gesamthöhe F 108 mm .............................= Total height F=108 mm
Antriebswellen-Durchm. G 4 mm ................= Drive shaft diameter G=4 mm
Lenkausschlag +/- 90° ..............................= Steering angle +/- 90°

For the other Schottels the dimensions are given accordingly.
You could ask Krick about lubrication: info@krick-modell.de
Regards, Volker


des

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Re: CEM Schottel drives.
« Reply #4 on: July 21, 2016, 04:45:55 »
Thanks for that Volker.  What is that step, or offset, in the vertical shaft tube?

Des.

Volker

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Re: CEM Schottel drives.
« Reply #5 on: July 21, 2016, 06:12:11 »
Hello Des, my best bet would be to ask Krick. info@krick-modell.de
Perhaps they can help you. Or you ask a dealer to measure it. I just have the information on their website.
Regards, Volker