NVWOCI WVS Posted October 11, 2007 Report Share Posted October 11, 2007 right so you might remember this http://www.trials-forum.co.uk/forum/index....hl=design+level well, i now have a final design and if any of you are interested here are the cad models. i think i might have made a mistake somewhere as the rear end looks a bit too long, but the geo when finished should be.>1060WB>385+CS (horizontal dropouts)>72* head angle>+20 to +25 BBgonna start building it after half term hopefully Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted October 11, 2007 Report Share Posted October 11, 2007 Larger diameter tubing would probably make it look a little more normal, and chances are it'd make it less flexy too.Just a thoughtComing along nicely though Quote Link to comment Share on other sites More sharing options...
Heatsink Posted October 11, 2007 Report Share Posted October 11, 2007 Looking good so far!Here's your To Do list for top marks/personal interest:Produce some simple 2D images showing the tyre clearance around the seat-stay & chain stay regions when the wheel is at the limits of its position in those horizontal drop outs.Produce a weight estimation for the frame based on the tubing Mass per unit length - Ask yourself how this could be optimisedProduce some concepts for improving strength at the key stress regions of the frame, looking at existing solutions already out there, gussets etc, and taking into account the additional massProduce some calculations taking into account the stresses which may exist in the tubing when hit/pulled by a force that you think is meaningful (mass of average person is say 80kg, what force may be passed through the frame on drops?) The cross-sectional area of the frame will influence the actual stress that occurs - how does this compare with the yield stress and UTS of steel?Compare the stiffness of using different tube profiles, rectangular & circular, based on Second Moment of Area Calcs - In which directions is stiffness important in a frame?Viable product? Cost of frame build versus perceived price market would pay. How could this become more viable if production done at a larger scale?Steve Quote Link to comment Share on other sites More sharing options...
The Hitcher Posted October 11, 2007 Report Share Posted October 11, 2007 Looks pretty kool, what programme did you use? Back end does look massively long but might just be how it looks. Keep us informed on how the buildings going Quote Link to comment Share on other sites More sharing options...
NVWOCI WVS Posted October 11, 2007 Author Report Share Posted October 11, 2007 thanks, steve. thats really useful yeah, got to do all the stress calculations and stuff still. oh yeah, thanks for the offer but edd potts sorted me out with some rb seals Quote Link to comment Share on other sites More sharing options...
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