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T O P I C    R E V I E W
Terry Posted - 11/02/2017 : 12:52:10
New poster here. I have been playing around with home made Velos for a few years.
I have had much help from members like ricmantoo and more recently Garrie Hill.
My interest is wood composite .the first Velo designed mostly by Rick turned out pretty well and I am now attempting to copy a WAW.
https://www.flickr.com/photos/146970675@N08/shares/tf8K02
I usually have lots of questions about Velo construction and bike stuff? but I do have a pretty good background in wood composite projects,so I like to help out interested parties where I can. Computer workings is definately NOT my strong suit! I hope these links to pics work , I am still trying figure all this out!!!
I have resisted posting before to this section as it seemed to be going in odd directions with old odd stuff!? For awhile I thought there was a hint of satire? Anyway, if a section is supposed to to be about velomobiles then I better add my 2 cents!
Terry

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25   L A T E S T    R E P L I E S    (Newest First)
carolina Posted - 12/15/2017 : 00:34:58
Terry, what in the hell ya doing? Merry Christmas and a happy new year 2018!

velosRus.com
carolina Posted - 11/11/2017 : 18:04:49
Also terry, you might like a big strong chain canal on this one. I dont know how your other velomobiel is in that department but my chain canal is like a spar on a plane.

velosRus.com
Speedbiker Posted - 11/11/2017 : 16:33:36
Also remember that your structure is only as strong at it's thinnest cross section. Loads don't care how fat the ends of a structure is if it's skinny somewhere else.
Carbon over even the lightest wood is a great idea!
carolina Posted - 11/11/2017 : 12:44:17
Here is pic of my velomobiel. You want the twin no teeth chain wheels. You want chain under bridge with a tiller. It doesnít matter about wide booms base and vertical,, your legs want hit. That is 10mm chain wheel axle, what you must use.

[/URL]

You see my seat adjustments, just quest hardware. I love my velomobiel. Like you, l own the company and will just make another.
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velosRus.com
carolina Posted - 11/11/2017 : 12:29:13
Daniel designed this for EVO people. Take your time, this is the hardest area of velomobiel unibody. Your bridge should be covered in cf and a piece of innegra sandwiched in between cf. Its 9$ yard. Carbon & innegra is strong as death.

[/URL]

The three black circles i made are all lilí fatter and wider which is no problem with cf-wood. You can shape balsa and cover with cf.

The wide base with couple bearings down @ bridge base it strong. This dang thing is strong because that is a 18 speed Pinion transmission setting atop. It can move forward or backwards with the round tube you see, then locked down.
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velosRus.com
carolina Posted - 11/11/2017 : 12:10:04
1) I can mail you the plug terry if ya want, then later you can mail back!

2) I think you should use cf over your sanded and shaped wood. AFTER YOU SAND YOUR CF OVER LAYUP AND SPRAY CLEAR ON IT IT WILL BE BEAUTIFUL.. Just get few yards of 11oz twill and yard of straight uni from compositeenvisions.com

3) I like tiller best and stock off shelf parts from the old country to me. I try not to invent hardware, its enough to care and improve all these molds (tools).

4) I have not figured out the tube backwards will work with tiller in the way. Unless one running on one side of tiller which might be good place for velcro to hold tiller vertical for getting in and out.

_________________
We can keep working on this with speedbiker, Garrie, warren, etc., and others and we might come up with something good.
ó

velosRus.com
Terry Posted - 11/11/2017 : 10:41:02
Update...
Stephane sent me drawings of the WAW boom. I can use those as a basis for another design. I will still try it in carbon or wood composite,or maybe both?
Stay tuned for a new mock up!
I suggest my idea of molded top and bottom plates will resist peddle forces adequately but I see how a long lever will definately spread the forces out even more!
Mike, I plan to use a tiller steer like yours in this version!
Also ,I'd like to copy your quest seat , can you send me some measurements so I could get a profile?
Thanks T
Speedbiker Posted - 11/11/2017 : 01:35:47
Terry, assuming you keep the full verticle tube, the run the tube from the seat to right behind the bb. And don't make the tube running forward from the verticle tube any longer than necessary.
carolina Posted - 11/10/2017 : 21:40:30
Man l donít know, but the waw has 2 tubes going back in photobucket and l will just keep thinking.

velosRus.com
Terry Posted - 11/10/2017 : 20:55:56
quote:
Originally posted by Speedbiker

Built as is you would have to over build it to take the loads. Run a tube back to in front of the seat and you can use lighter materials. Proper engineering, like physics, is not a matter of opinion. It's either a poor design, or a great design. Your present thoughts represent the former. But there is still time to improve it :-)


So, a tube from in front of the seat to the vertical member. Okay, where is the best place to terminate , the higher the better??
carolina Posted - 11/09/2017 : 21:36:41
Speedbiker

This is difficult: on the waw there are 2 tubes going backwards. This is all done for a removable front cowling/fairing.

Heres one plane of cf piece, mine would glue as a whole circle & touch both wwís and velo walls w/arch above. I would haf to use in my unibody. . Iam watchin terry too but he has tank steer.

[/URL]

The waw design has had strong animal riders. I think green one above is deadly strong but stationary bb. My velo will never be xl.

The velo-tilt velomobiel boom drops straight down, maybe that could help:

l see three boxes.
1) bridge
2) horizontal circle perimeter box on wall , floor, wheel wells.
3) vertical velo-tilt style box.


[/URL]
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velosRus.com
Speedbiker Posted - 11/09/2017 : 20:53:31
Mike, even with your invetered "T" box sections it isn't a proper design to manage the bending and twisting loads, but the carbon box sections are beefy enough to handle it. The loads are acting against very short levers where a long lever would handle the loads much more efficiently. On our liners the bb is on a tube that runs forward from the seat and has a tee running from one side to the other. This easily hands pedal loads from the strongest riders because the loads are spread out between points that are very spread out. While a very strong rider might never ride either of your velos, if they did damage would likely occur.
carolina Posted - 11/09/2017 : 19:46:56
Terry, i learned how strong the bridge is once glue in between frt two wheel wells. Its like a steel box as you know from your other build. You can have rear tube on rear bridge & frt base tube on frt of bridge floor.

[/URL]

You can bring it back almost to the yellow tape in frt of seat.

[/URL]

I will make a plug and mold for cf unit that is outside perimeter made at whole front of WAW. Set in place with windshield adhesive unlike yours but hopefully work. l have tiller,, l canít go backwards. . Not one thing wrong with Daniels DF boom design but in the future want removable frt too like waw.

_________________



velosRus.com
Speedbiker Posted - 11/09/2017 : 18:48:25
Built as is you would have to over build it to take the loads. Run a tube back to in front of the seat and you can use lighter materials. Proper engineering, like physics, is not a matter of opinion. It's either a poor design, or a great design. Your present thoughts represent the former. But there is still time to improve it :-)
Terry Posted - 11/09/2017 : 17:47:12
Yeah, that might help with the forces.
I am trying for the lightest I can do but if there's was too much twist I guess I could add a tube back towards the seat.
Thanks for the input.
Speedbiker Posted - 11/09/2017 : 17:12:01
Will a tube run back toward the seat to help manage the twisting/bending load?
Terry Posted - 11/09/2017 : 16:46:40
Yes, that is where the bb , should be situated..
I have jig that I can use( once I get the seat built) to double check bb location.

It is 12" off the floor and 7"" ahead of the wheel wells.
carolina Posted - 11/09/2017 : 16:19:12
Terry, is this about where you would want your bb?

Your hood has great visual everywhere.

[/URL]

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velosRus.com
carolina Posted - 11/09/2017 : 16:08:56
Remember this one?

This guy has real short legs and is only one that can ride rhis waw unibody.

I like this homebuilt idea below but pretty sure l canít fit: i bet this is strong and he has big fat cf going back towards seat. ZOOM IN!

[/URL]
ó

velosRus.com
carolina Posted - 11/09/2017 : 16:01:02
Hes not far off. Below is the stock one, zoom in. It has tube going back towards seat but thats it. ZOOM IN!

Terry donít forget you can buy the quest sliding bb/affordable if needed.

[/URL]
ó

velosRus.com
Terry Posted - 11/09/2017 : 15:59:02
Speed biker, you may well be right about the forces?
Since this is still at the "idea" stage, do you have any?

I am wondering if a wishbone shaped tube would tend to resist forces better? The closer the BB is to the verticle support ,the less flex there should be? My best guess measurement puts the BB about 7" ahead of the wheel wells..

This design makes for problems with long legs?

Ah, it would be sooo much easier if we peddled with only one leg!!

Speedbiker Posted - 11/09/2017 : 13:23:22
In would suspect that design wouldn't manage loads very well. You normally want a long tube(lever) resisting the primary forces.
carolina Posted - 11/09/2017 : 10:34:39
I love it, & itís adjustable.

velosRus.com
Terry Posted - 11/09/2017 : 10:10:48
Well, this is still in the planing stage but here is a mock up of a carbon adjustable "boom"https://flic.kr/p/GoM9Ci
Whatcya think??
carolina Posted - 11/07/2017 : 17:29:00
Alrite Terry man, dyyying fur some pics of your boom! Throw us a bone please .

velosRus.com

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