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Speedbiker
human power expert

USA
2001 Posts
Posted - 03/24/2012 :  19:32:59  Show Profile  Reply with Quote
Victor, that ring was HOBBED(do you know what that is?) by Boris Zakeldiev in the helicopter factory(city) where he was head engineer. I always figures he used those teeth for aligning it in the hob. He had fasinating stories of building an hpv in the Soviet Union. Boris was a genius hpv designer, or maybe in general. Now, lost to us to other pursuits.
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sean costin
human power supergeek

Lesotho
1921 Posts
Posted - 03/24/2012 :  20:29:20  Show Profile  Reply with Quote
It's a 104 T. I think it weighed 3 lbs before I primitively holed it out many years ago. I think the internal splines were to fit on a custom BB made by Boris. Everything Boris did was custom. Tom Ollinger has a 123T version of this ring. - I hope.

This chainring has a nasty notch in it. Boris says that he paid the machinist at Mil Helicopter in vodka to make the ring and he had started drinking it during the job. I'm not sure if Boris was joking, which he often does, but it does makes a good story.

The spindle pictured is a 60mm. I'll hopefully get a 70mm in there and the Boris ring will be driving a Bike Friday Modified Capreo hub.

I'm surprised no one mentioned the reversed spyder (compliments of Steve Delaire) which allows for a wider chainring positioning even when used with an ultra-narrow BB by running the pedal through the chainring. The Oddyssey Black Widows were perfect for this since the spyder bolts on to the cranks.

Tomorrow I will lop off the front of the Nocom and bond in a new BB at the proper extension.

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Speedbiker
human power expert

USA
2001 Posts
Posted - 03/24/2012 :  20:50:07  Show Profile  Reply with Quote
Sean, I thought yours was a 108. Mine(yours) I think is a 132. If course it won't fit in any hpv design I know. That Boris was a cool dude. I expect he is doing quite well, now.
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Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts
Posted - 03/27/2012 :  21:49:05  Show Profile  Reply with Quote
I would have to fix my cleats so my heels pointed outwards so as not to strike the chain and chainring. I don't normally pedal like that and wonder how that'd work.

Larry Lem
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sean costin
human power supergeek

Lesotho
1921 Posts
Posted - 03/28/2012 :  04:30:16  Show Profile  Reply with Quote
Larry,
It will not be necessary to alter my foot position at all. There his usually a huge space between the chainring and the shoe because the chainring is usually positioned on the other (internal) side of the crank. I am just narrowing that space between the shoe and the chainring because with the big ring you can run the pedal spindle under the teeth of the chain ring. This picture shows the cranks will clear the frame by about 3/16"and the chainring is positioned about 3/4"outboard of where it would normally be if I had mounted them on the normal side of the crank. In fact in this case, They would rub against the frame. unfortunately, I will need to use a pedal spacer to get enough clearance for my shoe, but 'll be able to cut this spacer down by 1/4" from what you see here.

In case anyone is confused, I put both crank arms on the same angle just to make sure I had proper clearance.
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Speedbiker
human power expert

USA
2001 Posts
Posted - 03/28/2012 :  05:54:20  Show Profile  Reply with Quote
Not much turning to the right. Welcome to the wonderful world of speedbikes. Nice work so far. Let's see that shell design!
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raymondg
recumbent guru

824 Posts
Posted - 03/28/2012 :  12:46:07  Show Profile  Reply with Quote
The shell is still (d)evolving. We'll have to see at what point it is fit for human consumption. As a teaser, I will say that since the constraints are fairly typical, the design looks fairly typical.

-Raymond
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Speedbiker
human power expert

USA
2001 Posts
Posted - 03/28/2012 :  14:17:16  Show Profile  Reply with Quote
Not too unlike a certain super fast trike shell, I hope!
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raymondg
recumbent guru

824 Posts
Posted - 03/28/2012 :  21:54:36  Show Profile  Reply with Quote
Well, aside from wanting to go fast at Battle Mountain, it has a completely different set of requirements. It will look much more like my first bike I made in college, only much smaller and lower.
-Raymond
(corrected. Thanks Larry)
Edited by - raymondg on 03/29/2012 08:51:39
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Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts
Posted - 03/29/2012 :  10:22:07  Show Profile  Reply with Quote
Perhaps start different threads for other bikes? Particularly when posting pictures? I know we all get carried away and inadvertantly redirect threads.

Unfortunately, there isn't much info available on Graeme's build and progress for this thread.

Larry Lem
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expedlar
Starting Member

United Kingdom
12 Posts
Posted - 03/30/2012 :  18:03:46  Show Profile  Reply with Quote
[http://www.humansinvent.com/#!/6131/return-of-the-flying-scotsman-inside-graeme-obree/]
We see some of his componentry in this interview. His kitchen is used as his workshop. :-)

quote:
Originally posted by Runxner

http://www.obree.com/ihpva.php

Graeme sets out on this unique adventure aboard his latest 'homemade' bike - 'Pie in the Sky'.

Team Low-Life
Lowracer Test Pilot/Evangelist
Adelaide, Australia
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Ben Goodall from Tri-Sled
Starting Member

Australia
48 Posts
Posted - 03/31/2012 :  18:54:26  Show Profile  Visit Ben Goodall from Tri-Sled's Homepage  Reply with Quote
Maybe someone can start a thread "Parts of your speedbike inspired by house appliances" ?

Should make for some good photos I would think :-)
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Upright Mike
human power expert

USA
3008 Posts
Posted - 04/01/2012 :  08:45:30  Show Profile  Visit Upright Mike's Homepage  Reply with Quote
quote:
Originally posted by expedlar

[http://www.humansinvent.com/#!/6131/return-of-the-flying-scotsman-inside-graeme-obree/]
We see some of his componentry in this interview. His kitchen is used as his workshop. :-)
GREAT VIDEO! INSPIRATIONAL! It looks like he will steer the fork directly with two stubs welded to it on either side. He is rather modest, and to him the build process is as much a part of the adventure as the race it seems. I hope he does well, and looking forward to meeting him in Nevada - where he'll be amongst other like-minded cycling revolutionarys.
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PUGZCAT
recumbent enthusiast

Canada
241 Posts
Posted - 04/06/2012 :  04:08:31  Show Profile  Reply with Quote
I wonder how Graeme Obree is going to cook up the streamliner shell in his kitchen. I hope he doesn't run out of time. I suppose there's plenty of composite experts and engineering students in Scotland who would be more than happy to help out the underdog and national hero.
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expedlar
Starting Member

United Kingdom
12 Posts
Posted - 04/07/2012 :  07:19:37  Show Profile  Reply with Quote
watching
http://www.youtube.com/watch?v=ZTKTTnk0v2Y

Obree had no career in cycling before his hour record: unemployed, training by himself, no HRM or trainers.... give him a warm welcome to the US of A! Obree is a legend!
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Adam C
recumbent enthusiast

USA
219 Posts
Posted - 04/07/2012 :  18:25:37  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by expedlar

watching
http://www.youtube.com/watch?v=ZTKTTnk0v2Y

Obree had no career in cycling before his hour record: unemployed, training by himself, no HRM or trainers.... give him a warm welcome to the US of A! Obree is a legend!

Great video! What an amazing person. You don't have to worry about Obree getting a warm welcome when he comes to Battle Mountain.
Edited by - Adam C on 04/07/2012 18:26:04
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Alan Krause
recumbent guru

508 Posts
Posted - 04/12/2012 :  16:22:35  Show Profile  Reply with Quote
I don't know if it works but here is a link to a picture on facebook
https://www.facebook.com/#!/photo.php?fbid=192925390825281&set=a.131256213658866.24847.131222586995562&type=1
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PUGZCAT
recumbent enthusiast

Canada
241 Posts
Posted - 04/23/2012 :  17:38:18  Show Profile  Reply with Quote
Hmm, Obree's bike, my guess, could be a bottom bracket behind the rear wheel prone bike. Time will tell.
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PUGZCAT
recumbent enthusiast

Canada
241 Posts
Posted - 05/01/2012 :  13:54:09  Show Profile  Reply with Quote
www.facebook.com/photo.php?fbid=207586629359157&set=a.131256213658866.24847.131222586995562&type=1&permPage=1

Prone bike, complete with sauce pan sections shoulder holsters!
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Speedbiker
human power expert

USA
2001 Posts
Posted - 05/01/2012 :  14:36:11  Show Profile  Reply with Quote
Looks like there is going to be alot of frontal area. I fear this is not good.
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raymondg
recumbent guru

824 Posts
Posted - 05/01/2012 :  18:58:46  Show Profile  Reply with Quote
Thom, funny, I saw that pic, and thought it looked like it was going to have very small frontal area, at least a lot smaller than I thought when I saw the first pic he put up. The height difference between the knees and the butt is very similar to the more common recumbent positions that have been so successful, but there will be no head bubble above that. It looks like his position will be similar to his first world record and world champion upright positions, just with his legs rotated out behind him.

Given the size of his motor, and his history, this might work out very well for him.

-Raymond
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PUGZCAT
recumbent enthusiast

Canada
241 Posts
Posted - 05/02/2012 :  03:13:04  Show Profile  Reply with Quote
Consider how high the frame is off the ground the frontal area won't be much more than 27 inches required for the foot box height. I can only guess what the fairing is going to be made out of, paper mache make from the daily newspaper?
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sean costin
human power supergeek

Lesotho
1921 Posts
Posted - 05/02/2012 :  04:33:17  Show Profile  Reply with Quote
If I recall correctly there was a prone streamliner at Eureka that had a tiny width. I seemed to recall it was named "Taco something". I remember it didn't go too well and I think the bike was hastily finished. I think the bike was rather seamless and it split in the back and bottom where the rider would enter, something like the Cutting Edge bike. It looked to have great potential, but I never recall seeing that guy again.

Anybody have a picture of that one?

Too bad Graham doesn't have composite experience. It seems this bike would benefit.

Sean
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bowi
Starting Member

Netherlands
15 Posts
Posted - 05/02/2012 :  04:57:01  Show Profile  Reply with Quote
quote:
Originally posted by PUGZCAT

Consider how high the frame is off the ground the frontal area won't be much more than 27 inches required for the foot box height. I can only guess what the fairing is going to be made out of, paper mache make from the daily newspaper?


Maybe an alloy fairing, like the 'Alleweder'?

I would advise him to give HPT Delft a call. The moulds of the VeloX 1 are for sale.....But I don't think it would fit.

Seb
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Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts
Posted - 05/02/2012 :  12:53:51  Show Profile  Reply with Quote

secret test photo

Larry Lem
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