[python] Re: Yellow Submachine

Hi Jurgen

Thank you so much for those pictures and explanation of the Yellow Submachine!! I never heard back on that email I sent out him. Its too bad as I would like to have learned much more. I'd still love to see some basic plans of that very original bike. He must have worked to something.

Sorry I've been kind of hanging low myself. Almost a year ago I got a great deal on a brand new 30Ton press;

http://surfin_dude.tripod.com/creative/equipment/machine.html#Press
http://surfin_dude.tripod.com/creative/equipment/PressF.jpg

which I've only recently set up. I originally got it to do mundane things like press a shaft on or off a "hole" but recently I started to think it might be good for sheetmetal work. I tested it out on a light bracket design for my streetmachine (see attachment). The idea was to make the bracket strong but not really noticed. This gave me an opportunity to learn sheetmetal mode in ProEngineer. Once done a flat pattern is a button press away. I had some 0.090" (2.3mm) steel sheet laying around so designed it for that. I made a bending jig like two nested upside down square-bottomed "U"s. Happiness was seeing it bend like it was paper (so fast it literally snaps into shape). I see many possibilities here. :-) I might try tube bending. BTW the picture also shows my custom speedo-mount. This recently allowed me to see what 67kph is like (going downhill in the Gatineau Park). I don't know how you guys do it. That speed seems slow in the car but on the Streetmaching it felt like I was Craig Breedlove going for a land speed record (yet there was a lot of headroom for even more speed if I wanted it).

I envy the ability to see such a collection of wonderful bikes all in one place like Spezi!

Cheers
Daryl


From: Jürgen Mages <jmages@xxxxxx>
Reply-To: python@xxxxxxxxxxxxx
To: "Python Mailinglist" <python@xxxxxxxxxxxxx>
Subject: [python] Yellow Submachine
Date: Mon, 1 May 2006 21:11:38 +0200

Hello listies,

recalling the big resonance, the Yellow Submachine had
in previous threads, I would like to present some up to date
material:

http://www.python-lowracer.de/doc/Yellow%20Submachine-DSCF4701.jpg
http://www.python-lowracer.de/doc/Yellow%20Submachine-DSCF4702.jpg
http://www.python-lowracer.de/doc/Yellow%20Submachine-DSCF4703.jpg

Credits to Hanno Hirsch who took the pictures at the SPEZI
recumbent fair Germersheim last weekend.
More here: http://www.hpv.org/scene/karlsruhe/SPEZI06/

The sense of all the submachine's contraptions is mostly the on-the-fly
adjustment of the seat height from lowracer to highracer position.

Other rumours speak of brake energy recuperation (because of the
rubber band) but I doubt that. Also note the SON hub dynamo in the
rear and the Speedhub in the front wheel: Lecker fiets!

At the end of this posting you can find an epic german explanation by
Ernst  from Liegeradforum. Maybe s.o. is willing to translate that  ;-)

Finally I want to apologize for sparse mailing list presence in the next
time. Reason is this:
http://www.python-lowracer.de/pics/gallery/P3%20on%20Tour.jpg

Cheers,
Jürgen.


1. Yellow Submachine: Prinzip hat nichts mit Speicherung oder Rekuperation
von Bremsenergie zu tun. - Der Sitz ist vielmehr neigungs- und
höhenverstellbar, zwischen "hoch und aufrecht" (in der Stadt etwa) und
"tiefliegerähnlich" (zum Düsen auf Strecke). Vorderradantrieb, Knicklenker.
Der geflochtene Gummistrang balanciert das Fahrergewicht zur
Höhenverstellung aus. Die zusätzliche "Bremsscheibe" hinten ist durch eine
Feder normalerweise angebremst, blockiert die Höhenverstellung, wird zur
Verstellung über einen weiteren Bremshebel am Lenker gelöst. Eine
"Demonstration" funktionierte so: Anfahrt in Liegeposition, beim Anhalten
vorn gebremst, dabei "Verstellbremse" hinten gelöst --> "Staucheffekt" läßt
Sitz von allein in "Aufrechtposition hochbocken", weil das System sozusagen
durch Kompensation des Gewichts über den Gummistrang "in der Schwebe" ist. -

Super Details weiter an dem Teil: Der vordere Teil des Sitzes ist beweglich
und wird durch Einbeziehung über eine Strebe in die "Schwenkmechanik" immer
in optimaler, weil verrutschsicherer, Position gehalten. Der linke
Lenkergriff ist hohlgebohrt, und ein zum Spiegel hochgeführter Bowdenzug
bewirkt, daß bei der Sitzverstellung dieses "HPV-Schwenkflüglers" der
Spiegel immer in korrekter Einstellung für den klaren Rückblick bleibt. -
Eigenbau-Sitzplatte (mit Polster) läßt sich nach vorn aufklappen, dahinter
ist Stauraum. Usw.....

Ernst

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