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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/01/2011 :  12:10:49  Show Profile  Visit Adam C's Homepage  Reply with Quote
How do you design your HPV's? Pencil and paper or CAD software? If you use CAD software which one do you use?

Speedbiker
human power expert

USA
2421 Posts

Posted - 11/01/2011 :  14:52:17  Show Profile  Reply with Quote
Both. For a fun liner I use pencil. For a serious liner my team uses Unigraphics. My brother being a UG guru.
What do you hope to build. Warren, where is that page of liner design guidelines?
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/01/2011 :  14:58:53  Show Profile  Visit Adam C's Homepage  Reply with Quote
I'm hoping to builder a racer to compete at Battle Mountain next year.
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OpusthePoet
recumbent guru

USA
678 Posts

Posted - 11/01/2011 :  21:04:40  Show Profile  Visit OpusthePoet's Homepage  Reply with Quote
Initial concept pencil and paper, everything after that done with CAD.

Opus

My gas is up to $0.99 a burrito, $5.99 for premium and I'm only getting 10 miles to the regular burrito. Dang $0.99 burritos are smaller now.
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/01/2011 :  21:07:46  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by OpusthePoet

Initial concept pencil and paper, everything after that done with CAD.

Opus

My gas is up to $0.99 a burrito, $5.99 for premium and I'm only getting 10 miles to the regular burrito. Dang $0.99 burritos are smaller now.


What CAD program do you use?
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Jeff Wills
human power supergeek

USA
1204 Posts

Posted - 11/01/2011 :  21:20:32  Show Profile  Visit Jeff Wills's Homepage  Reply with Quote
quote:
Originally posted by Adam C

I'm hoping to builder a racer to compete at Battle Mountain next year.




You're better off buying an existing machine and modifying it to your requirements. I bought a clone of the Cuda-W from Warren in 2010, and I've been working on it since (off and on) to get it running properly and fitting me. (He and I are the same height, but I'm about 2 inches wider across the shoulders.) I'm still hoping to be ready by Battle Mountain next year.

If you want to be ready for Battle Mountain in September, start building now.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/01/2011 :  21:25:34  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by Jeff Wills

quote:
Originally posted by Adam C

I'm hoping to builder a racer to compete at Battle Mountain next year.




You're better off buying an existing machine and modifying it to your requirements. I bought a clone of the Cuda-W from Warren in 2010, and I've been working on it since (off and on) to get it running properly and fitting me. (He and I are the same height, but I'm about 2 inches wider across the shoulders.) I'm still hoping to be ready by Battle Mountain next year.

If you want to be ready for Battle Mountain in September, start building now.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html



We are "building" now. We acquired the Cal Poly Lazarus faring molds a few weeks ago and are fervently going through design iterations presently.

Edited by - Adam C on 11/01/2011 21:27:21
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Speedy
recumbent guru

USA
752 Posts

Posted - 11/02/2011 :  08:19:11  Show Profile  Reply with Quote
simple robust 2D that can output a .dxf file (useable on waterjet, laser, large printers, etc)

http://www.3ds.com/products/draftsight/overview/
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warren
human power expert

4833 Posts

Posted - 11/02/2011 :  09:13:30  Show Profile  Visit warren's Homepage  Reply with Quote
I use paper, sometimes CAD (cardboard aided design).
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/02/2011 :  10:15:07  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by warren

I use paper, sometimes CAD (cardboard aided design).


Hahahahahaha!
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/02/2011 :  10:17:32  Show Profile  Visit Adam C's Homepage  Reply with Quote
Has anyone used Google Sketchup for their HPV designs?
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Speedy
recumbent guru

USA
752 Posts

Posted - 11/02/2011 :  11:11:19  Show Profile  Reply with Quote
sketch up is useful to a point ...
the free version I was playing with a couple years ago wouldn't output a file extension that could be used in a CNC
.stl , .dxf or such


turbo cad is often on sale at places like office depot for less then $100 it is a 3D Cad and will output the proper files
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Royle Juusola
Starting Member

USA
16 Posts

Posted - 11/02/2011 :  13:05:08  Show Profile  Reply with Quote
I use Solidworks, however I get my copy free because I'm a student.
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/02/2011 :  13:13:26  Show Profile  Visit Adam C's Homepage  Reply with Quote
One of my goals for our team is to be as low budget as possible. There are several free CAD programs available.

http://www.freebyte.com/cad/cad.htm

Has anyone tried these CAD programs? Some of them look interesting. I'm definitely going to check them out.

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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 11/02/2011 :  13:18:19  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by Speedy

sketch up is useful to a point ...
the free version I was playing with a couple years ago wouldn't output a file extension that could be used in a CNC
.stl , .dxf or such



turbo cad is often on sale at places like office depot for less then $100 it is a 3D Cad and will output the proper files


It looks likes this functionality is available on the professional version of Sketchup which is $495.00.
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jhnj26
Starting Member

33 Posts

Posted - 11/02/2011 :  17:12:35  Show Profile  Reply with Quote
This may be of interest:

http://www.123dapp.com/

- John
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Speedy
recumbent guru

USA
752 Posts

Posted - 11/02/2011 :  17:29:25  Show Profile  Reply with Quote
AutoDesk is looking to make up ground lost to SolidWorks
this program should do it
thanks for sharing
more input once I try it for a while



quote:
Originally posted by jhnj26

This may be of interest:

http://www.123dapp.com/

- John

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OpusthePoet
recumbent guru

USA
678 Posts

Posted - 11/03/2011 :  16:58:29  Show Profile  Visit OpusthePoet's Homepage  Reply with Quote
I used to use a program called Q-CAD, but when I upgraded my OS I couldn't find a compatible version, I'm trying to get a program called SAG-CAD running on my hardware/OS combination but the program doesn't like my video card, plus it's text output is in Kanji and I only rear Katakana and Hirogana (and I hope like heck I spelled that right because my spell-checker loses its mind on non-European languages). Because of my budget I have to use old computers and free software (this box is running a PIII 733MHz CPU).

Opus

My gas is up to $0.99 a burrito, $5.99 for premium and I'm only getting 10 miles to the regular burrito. Dang $0.99 burritos are smaller now.
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Speedy
recumbent guru

USA
752 Posts

Posted - 11/04/2011 :  12:20:59  Show Profile  Reply with Quote
this one looks and feels like Inventor
so far I've found only one proprietary file extension so it may not be of much use



quote:
Originally posted by jhnj26

This may be of interest:

http://www.123dapp.com/

- John

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Roy_Rada
Starting Member

USA
11 Posts

Posted - 11/08/2011 :  13:10:43  Show Profile  Visit Roy_Rada's Homepage  Reply with Quote
Hello all,
I'm the captain of HPV design team at the University of Florida. We do our initial brainstorming in pencil or with chalk on a white board. I also sometimes do simple sketches in microsoft paint. All of our serious designing is done in CAD using solidworks. I don't have experience with much other software, but I like solidworks. It gives us the ability to create an accurate 3d model, indicate materials used, run FEA to predict failure, and also we can import our fairing and run CFD to determine drag coefficients etc.
SolidWorks is also great for producing drawing files and other files for a design report.
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jhnj26
Starting Member

33 Posts

Posted - 11/08/2011 :  15:24:06  Show Profile  Reply with Quote
I think it is a fairly standard file format:

http://en.wikipedia.org/wiki/STL

and click on "STL (file format)" in software.

- John

quote:
Originally posted by Speedy

this one looks and feels like Inventor
so far I've found only one proprietary file extension so it may not be of much use

quote:
Originally posted by jhnj26

This may be of interest:

http://www.123dapp.com/

- John



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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 01/16/2012 :  23:36:52  Show Profile  Visit Adam C's Homepage  Reply with Quote
I came across this neat CAD program called T-Flex.

http://www.tflex.com/nv_cad_12.htm

http://www.progecam.com/cad/tflex/Brochures/T-FLEX%20CAD%20Brochure.pdf

It's from a Russian software company. Unfortunately, I don't think it's sold in the US yet. I'll keep looking, though.


Edited by - Adam C on 01/16/2012 23:40:06
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25hz
human power supergeek

Canada
1223 Posts

Posted - 01/17/2012 :  05:47:43  Show Profile  Visit 25hz's Homepage  Reply with Quote
I used to mainly use a piece of paper and pencil to rough sketch a design, but i got a hold of an old copy of 3D Studio Max, and as my designs are pretty simple and angular, it was very easy to learn the basics of 3DS and design in it. I made all the wheels, seats, and most important parts in 3DS, so when I wanted to make a new bent, I just imported the wheels and seats, positioned them where I wanted, and filled in the frame to connect the parts. The thing I liked was it would show me where there was interference and whether physically the design would work. After that, I just recorded the angles of cuts, and lengths of the frame pieces, and built the bents.

http://fleettrikes.com/cads/26%20inch%20rear.jpg
http://fleettrikes.com/cads/mk4%20seat.jpg
http://fleettrikes.com/cads/flying%20cross%20md%20frame.jpg
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purplepeopledesign
recumbent guru

Canada
584 Posts

Posted - 01/18/2012 :  02:28:57  Show Profile  Reply with Quote
I use Rhino3D. Much better interface than Solidworks.

:)ensen.

Those who claim to be making history are often the same ones repeating it.

Video of my trike
http://www.youtube.com/watch?v=MdSLRD_2vzc
Photos of my trike
http://www.flickr.com/photos/purplepeople/
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Adam C
recumbent enthusiast

USA
227 Posts

Posted - 01/18/2012 :  08:38:36  Show Profile  Visit Adam C's Homepage  Reply with Quote
quote:
Originally posted by purplepeopledesign

I use Rhino3D. Much better interface than Solidworks.

:)ensen.

Those who claim to be making history are often the same ones repeating it.

Video of my trike
http://www.youtube.com/watch?v=MdSLRD_2vzc
Photos of my trike
http://www.flickr.com/photos/purplepeople/


I've been seriously thinking about getting Rhino 3D. I've read their website thoroughly. I see a lot of purdy rendered examples of artsy fartsy stuff like like dragons, jewelry, shoes, furniture, etc., but I don't really get a sense as to how good it as as a mechanical CAD program. Can you build solid models with Rhino 3D? Can you build assembly models with it? I assume it does not have a 2D drawing package?

Edited by - Adam C on 01/18/2012 08:39:05
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purplepeopledesign
recumbent guru

Canada
584 Posts

Posted - 01/18/2012 :  11:55:26  Show Profile  Reply with Quote
Rhino is in use mostly by industrial designers. It does not do "solid" models, but it does 3D surface models. The question to ask is what is the difference? As far as I can tell, the only advantage of a solid model file format is when you have an assembly of multiple parts comprised of different materials. With that, FEA can do it's job on the whole assembly. For CFD, the software only needs to know the surface geometry and for that Rhino excels. If I could afford it, I would also have Solidworks with the associated CFD and FEA. I would model in Rhino and import to SW for assembly and analysis. Instead, I tend to build with a "solid" strength factor built in... at the cost of weight instead of money.

:)ensen.

Those who claim to be making history are often the same ones repeating it.

Video of my trike
http://www.youtube.com/watch?v=MdSLRD_2vzc
Photos of my trike
http://www.flickr.com/photos/purplepeople/
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