Sportster softail chopper frames3/10/2024 Please note design and safety disclaimer on the drawing. Sufficient gussets should be added to the frame based on where the maximum loading will occur. All connections between the tubes were assumed to be perfect. Welds in real life are not perfect and can fail much earlier than this load.Engine load as well as a persons load will most likely never exceed this value and the frame as designed should be sufficiently rigid for this application.Slight deformation occurs of 0.07” with this extreme load. Frame can withstand load of 2200 lbs without any significant material failures. ![]() And it helps tremendously because the only other way for us to specify those compound bends and angles would be to have multiple horizontal and vertical dimensions on multiple views.Īdditional Technical Details Of The Rigid Bobber Plans (Details of sotftail plans are very close and if you need specific load tests on it let us know). ![]() Our bobber plans were simplified by creating special "sectional" views: This shows you how the frame would look if it were cut at a specific plane. In addition, there are numerous locations where there are repeat dimensions which are unnecessary and clutter the drawing making it hard to read. So if the frame has unique bends on it then these bends are specified with a bunch of dimensions which force you to do multiple calculations in order to determine exactly what angle the bend needs to be, as well as what the length of tube should be. ![]() See below for a Finite Element Analysis.ĭisadvantages Of Buying Bobber Plans Anywhere Else But Here: The main difference is that the plans you will find for sale elsewhere only have basic views of the frame. The frame measurements are as exact as they can be including load tests and more. Our bobber plans were not just drawn up on a kitchen table.
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