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Larry Lem
human power supergeek

South Sandwich Islands
1997 Posts
Posted - 05/14/2012 :  07:28:56  Show Profile  Reply with Quote
More room for heels, I see.

Larry Lem
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sean costin
human power supergeek

Lesotho
1925 Posts
Posted - 05/15/2012 :  20:04:23  Show Profile  Reply with Quote
I haven't a clue if there is more room for the heels. As they say, A miss is as good as a mile.

The design is going to 3D printing compliments of Dr. Dave at CCSU. Should look great up on Raymond's mantle.

quote:
Originally posted by Larry Lem

More room for heels, I see.

Larry Lem
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Larry Lem
human power supergeek

South Sandwich Islands
1997 Posts
Posted - 05/15/2012 :  21:26:58  Show Profile  Reply with Quote
And an interference can be a wasted year.
Compare the two front views. The old front was much rounder.

Larry Lem
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Speedy
recumbent guru

USA
661 Posts
Posted - 05/16/2012 :  09:22:07  Show Profile  Reply with Quote
When you 3D print are you going to have the parts move for clearance check or is this mantle art ?
why I ask
At work we have 6 - 3D printers for knocking out proof of concept.
Last week I printed a car with moving engine, transmission, wheels. Everything fully assembled in one print cycle with several material properties.
I'm allowed to print interesting things ... no cost.
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raymondg
recumbent guru

829 Posts
Posted - 05/16/2012 :  20:19:15  Show Profile  Reply with Quote
We're also going to be laser or waterjet cutting cross sections at the critical pedal box and shoulder/helmet locations for check fits of actual geometry.
-Raymond
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Speedy
recumbent guru

USA
661 Posts
Posted - 05/17/2012 :  08:30:48  Show Profile  Reply with Quote
Have you seen the new Autodesk 123Make software ?
It makes 2D slices from a .stl model which then can be printed or cut.
Easy to use.
A free download.
Should be super useful in fit checks and mold making.

BTW
Recently changed jobs (6 weeks in)
Paycheck comes from Autodesk but I report to Instructables.
Shop manager for a shiny new, high tech fab shop ... all the stuff.
Next door to the Techshop in SF with full access to their machines too. (also Autodesk supported)
A bit of a black ops situation in that - all this high tech but the building is funky, nondescript rat hole in an alley.
Lots of artisans in the neighborhood and share the building with Burning Man's Department of Public Works.

A weird and wonderful change of pace.

Hoping to be out at the races this year to watch.
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Speedbiker
human power expert

USA
2037 Posts
Posted - 05/17/2012 :  09:33:25  Show Profile  Reply with Quote
That sounds great, Steve. When can we expect to see your next wonderbike/streamliner?

:-)
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Speedy
recumbent guru

USA
661 Posts
Posted - 05/17/2012 :  10:01:28  Show Profile  Reply with Quote
in progress
I'm guiding, engineering, support and watching
a highly talented youngster is doing the fab work and pedaling




quote:
Originally posted by Speedbiker

That sounds great, Steve. When can we expect to see your next wonderbike/streamliner?

:-)
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Dreamer
recumbent guru

USA
542 Posts
Posted - 05/17/2012 :  20:15:47  Show Profile  Reply with Quote
quote:
And an interference can be a wasted year.

A carefully constructed mockup with a working drive provides information the computer generated drawings likely can't. The human foot exhibits dynamic changes during a pedal stroke that differ from rider to rider and may well vary when fatigue sets in.

With the rider in the mockup pedaling at high rpm a visual inspection can check clearances. Pedaling at lower rpm allows a critical "can your foot hit the shell" approach to design that has the potential to identify fatigue induced clearance variations in the foot box.

full scale mockups may be a more time consuming process than computer modeling but when the rider hits the road they provide a cheap guarantee that the rider will fit and an opportunity to make design modifications before constructing the finished fairing if they don't.

Don
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raymondg
recumbent guru

829 Posts
Posted - 05/17/2012 :  20:34:12  Show Profile  Reply with Quote
I had Sean video his pedal stroke through many revolutions, and send me his shoe measurements. I then picked frames out of the video that represented the worst case, mostly from heal drop, and used those frames to generate the models shown in the image below. I then created an offset surface of my fairing design to check clearance to a certain tolerance. This is an evolved approach from what I used on the Orion, which worked out pretty well.

Of course, if I got any part of that process wrong, printing models of it wouldn't tell me anything, as they would be to that error, instead of reality. Cutting out full size templates that Sean can mount up to his Nocom, and then pedal in, should tell us all we need to know.
-Raymond
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Speedbiker
human power expert

USA
2037 Posts
Posted - 05/17/2012 :  21:34:04  Show Profile  Reply with Quote
If it fits as well as the Coslinger after my brother modeled it, you'll be golden. I believe a similar technique was used.
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JMvD
New Member

71 Posts
Posted - 05/23/2012 :  11:43:15  Show Profile  Reply with Quote
The website of team Cygnus went through a couple of changes. The updates of our project will be published at:

http://cygnushpv.blogspot.com/ (English)
http://cygnus-hpv.blogspot.com/ (Dutch)

The Dutch website will serve as a training guide for the Dutch language. So you will be able to read and speak Dutch by the time we arrive in Battle Mountain next september.


The photo's not worthy enough for the website can be found at:
https://picasaweb.google.com/107515777067169972313/


Cheers,

Jan-Marcel
(on behalf of Team Cygnus)
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W Hilgenberg
recumbent enthusiast

USA
260 Posts
Posted - 05/27/2012 :  01:43:09  Show Profile  Reply with Quote
Over here in California we have picked up the work again on the bike now that the ASME bike has been finished and we can pull people back to our project. As we stand right now, the subframe is mostly finished and we are now starting on the initial CNC cutting of the fairing mold. For there we will do a hand finish of the shape and modify anything that was missed in the CAD stage and then we can start the layups!

For pictures and info of our latest progress;
http://auroraspeedbike.blogspot.com/2012/05/mold-and-pump-progress.html

For our general blog of the details of all the past milestones;
http://auroraspeedbike.blogspot.com/

Enjoy!
Will Hilgenberg
Aurora Speedbike Team Lead
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Upright Mike
human power expert

USA
3038 Posts
Posted - 05/27/2012 :  05:38:36  Show Profile  Visit Upright Mike's Homepage  Reply with Quote
I discovered last weekend that a low gear helps out immensely when launching. I was racing my Chuck No-rush (thank's Thomas for the name!) streamliner in Michigan. Previously it had only a 100 gear inch low. I repeatedily dumped it over while someone tried to start me. I installed a 65 gear inch low this past weekend and started several times with no problems.

Over this summer I will be working with Don (airxxxwolf) to redo the drivetrain to accomodate a 65 gear inch low to 233 gear inch high. Last time at Battle Mountain, I spun out my 200 gear inch high (58 mph at 95 rpm).

This time I want to do at least 65 mph, and more importantly, don't want to dump it at the start (that's embarassing) I'll have a 14-speed setup with double cranks, but figure I'll only cycle through 9 gears to get up to speed.
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W Hilgenberg
recumbent enthusiast

USA
260 Posts
Posted - 06/01/2012 :  06:45:53  Show Profile  Reply with Quote
We finished cutting the first half of the mold! All that is required is to do the hand finishing once we figure out where we will be working this summer. But we are making progress. Now we just have to cut the other mold half during finals week. . .

www.auroraspeedbike.blogspot.com





And with our rider Matt Baker in the outline.
Edited by - W Hilgenberg on 06/01/2012 06:46:50
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ellen
Starting Member

Netherlands
31 Posts
Posted - 06/05/2012 :  14:02:00  Show Profile  Visit ellen's Homepage  Reply with Quote
Just finest the Velox X
For pictures look at www.elan.cc

Greetings Hans van Vugt
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Larry Lem
human power supergeek

South Sandwich Islands
1997 Posts
Posted - 06/05/2012 :  14:27:43  Show Profile  Reply with Quote
VeloxX for Ellen, what a surprise!
A vehicle and rider to challenge Barbara at last. And already testing!

Battle Mountain will indeed be crowded this year.

I hope that you will use some other material for the windshield than "acrylic" since it is usually so brittle. (I am uneducated about possibly more advanced forms of acrylic.)

Larry Lem
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Garrie L Hill
human power supergeek

USA
1305 Posts
Posted - 06/05/2012 :  17:39:13  Show Profile  Reply with Quote
Larry, PETG.

Garrie "carbon based lifeform" Hill
HPRA Co-Dictator of the East
for pics of some of my time and money sucking projects
http://garriehill.winkflash.com/
and
http://s58.photobucket.com/albums/g277/cfbb/
and videos
http://vimeo.com/5513519
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cbroome
Starting Member

USA
37 Posts
Posted - 06/06/2012 :  07:29:37  Show Profile  Reply with Quote
Acrylic would pose problems at B.M. Tech Inspection.

-- Chris Broome
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W Hilgenberg
recumbent enthusiast

USA
260 Posts
Posted - 06/06/2012 :  07:42:10  Show Profile  Reply with Quote
Even that far away from the riders face? I fully understand the reasoning for head bubble so was wondering about the window being at the feet.
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cbroome
Starting Member

USA
37 Posts
Posted - 06/06/2012 :  07:48:45  Show Profile  Reply with Quote
Check the photos from Hans Wessels's crash in the White Hawk in 2004:


http://www.recumbents.com/wisil/whpsc2004/resultsfriday.htm

You can't control where any pieces of shattered acrylic might go.


Chris Broome
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Larry Lem
human power supergeek

South Sandwich Islands
1997 Posts
Posted - 06/06/2012 :  08:04:00  Show Profile  Reply with Quote
I don't know if Garrie was pointing out that Hans will be using PETG, or was just indicating that is what folks would use as an advancement in windshield construction. I know that's what George Leone uses and tried to help me with. I've simply been buying polycarbonate Windwrap windshields from Terracycle.

In the Elan blog, it is quite possible that the use of the word acrylic may not have been exact and may have simply been a stream of consciousness/typing.

I thought the Deft folks mentioned the windshield material that they used last year but I can't find it on their site now.

Larry Lem
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Upright Mike
human power expert

USA
3038 Posts
Posted - 06/06/2012 :  13:43:28  Show Profile  Visit Upright Mike's Homepage  Reply with Quote
Lord of the Rings
I just got a 70 and 80 tooth Chainring in the mail from RaptoBike! Thanks Arnold! He is super quick with shipping! The chainrings are supernice. I remember the days when the largest rings out there I think were 62 tooth for some Moultons. Everyone else had to make their own superbig chainrings. Now big rings can be bought without having to give a bottle of vodka to some guy in a Russian helicopter factory to mill one out for you (I'm referring to this story I've heard from Sean-Thom-Garrie) Who knows maybe even this most famous of Russian imports will make its appearance at Battle Mountain this year. I think Garrie gave a duplicate chainring to Steve this year in Florida....

http://www.wisil.recumbents.com/wisil/racing2012/florida_mowett/Awards%20Garrie%20Hill%20awarded%20Steve%20Hansen%20a%2092%20tooth%20chainring%20for%20his%20trike%20%20to%20go%20faster.JPG
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Speedbiker
human power expert

USA
2037 Posts
Posted - 06/06/2012 :  14:21:15  Show Profile  Reply with Quote
Sean will likely use the Russian ZAK 104 tooth ring(hobbed in helicopter city). I plan to use a Pete McAdams custom 90. Pete is from Canada and does beautiful work with a lazer and mill.
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Speedbiker
human power expert

USA
2037 Posts
Posted - 06/06/2012 :  14:22:57  Show Profile  Reply with Quote
Oops. My other liner will use a McAdams custom 96....
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