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- Newsgroups: rec.bicycles.tech
- Message-ID: <4sZAojlbv4@bi-l003.bi-link.owl.de>
- From: H.ZIERKE@BI-LINK.owl.de (Hans-Joachim Zierke)
- Path: sparky!uunet!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!math.fu-berlin.de!fub!sisyphos.owl.de!bi-link.owl.de
- Subject: Dynamo efficiency (Re: looking for DT Sw
- Date: Fri, 25 Dec 92 13:00:00 +0100
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- References: <crauel.724603784@vieta.math.uni-sb.de>
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-
- On 17.12.92, crauel@math.uni-sb.de writes:
-
- c> H.ZIERKE@BI-LINK.owl.de (Hans-Joachim Zierke) writes:
- c>
- c> () A Sanyo Dynapower is about 25% efficient, the bottom bracket dynamos
- c> () of Union and Soubitez 35-40%, the new Union 9001 40-45%. Engineers
- c> () working on this told me that the borderline for hub generators might
- c> () be 70%, but the DT hub will not reach this (a 70% efficient hub dynamo
- c> () will always be bigger than the DT).
- c>
- c> Thank you for this information. Do you also have information on the
- c> efficiency of the NORDLICHT and the AXA tyre-wall (or which is the
- c> proper notion?) generators, and would you be willing to provide it
- c> on this board?
-
- The numbers for Sanyo roller, Union 8601, Soubitez roller are independent
- test data, the number for Union 9001 is a factory claim.
- The 9001 (the small "mouse" with <please translate "Bariumferrit"> ;-)
- magnet material) is still in a prototype status. (UNION might tell you it is
- ready for production, but since I got a test sample, I'm sure it has a
- prototype status :^) .) I expect it to be very good when the work is
- finished.
-
- The factory claim of UNION will be okay, they don't lie normally - they
- always take the "best" speed for the measurement, as anybody would do.
-
-
- The NORDLICHT dynamo is about 20-25% efficient according to independent
- tests.
- I don't remember the exakt figure for the AXA, but it should be in the
- 35% range. This is a factory claim, too, but trustable.
-
-
- Ciao
- Hajo
-
- --
- Hans-Joachim Zierke ## Tel.: +49-30 / 394 8445 ## Fax: +49-30 / 394 8447
- h.zierke@bi-link.owl.de
-