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Papa B

Getting Comfortable
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Everything posted by Papa B

  1. Just finished that axle testing, looking really good. They are definaltly strong enough, as with all thinkings testing took alot longer than first estimated. I tested in bending as well as torsion to assess the ability of the axle in cornering and side impact...
  2. for anybody who is interested, here is my interim report, its 3 pages of where the project is heading.... lr 4x4Interim report-Luke Burras.pdf
  3. Project progressing well, i am getting the flanges made up to load the my defender axle on the torsion machine, basically see how much it can handle before it snaps! So i am thinking that there is space for a viable product if its cheap enough, so dream with me... if i could make them using an alternative method, which afterall is the basis of the project (exploring new methods)what value would people be willing to pay to add them to thier truck? someone mentioned half the price of the killer axles?
  4. also what do you guys think about using a CVT, like that as on a scooter??
  5. Thanks for the input guys, i started with a reasonably similar view to all of you, that actually its been done and its been expensive. i think one of the biggest reasons people dont buy them is because they are so expensive, which is offcourse because gears are so expensive to cut. If i could bring the cost down with a fundementally differnt design ie: to use a belt/chain drive,bringing down the cost on gears and in the case of a belt it would not need lubrication... another option is to use existing gears, ie like those that bill van snorkel used (if i remember correctly) However, i am still in the early stages, i think its safe to say that its definatly more of a technical project with a marketing bit tagged on, in some ways it doesnt matter if it doesnt go to market, as long as i can understand why... We can make thinks much more cheply with the university workshop, its staffed with about 20 guys who's job it is to make things for projects. With regards to land rover axle strenght i am wokring on assesing thier strength through testing in the next couple of weeks. This will either yeild a confident yes, or a project stopping no! I have spent a while reading various threads, i saw the american guy on pirate 4x4, i think the main problem with his concept was that he limited himself to a typical gear mechanism, one of the beauties of a final year project is that it pushes you to explore new concepts and problems that have previously not been overcome, i dont want to just copy something that is too expensive, i want to make it cheap enough to be popular...i am pretty sure lots of people would have them over a lift, if they were cheaper??? loving the input!
  6. Hi, So i am reasonalby new to this forum, but i have recently just finished helping disty with his defender rebuild, went for a great drive in the snow just now! Basically, I am a 4th year engineering student and for my final year project i am working on designing and commercialising a set of portal boxes to be bolted onto the end defender axle casings. Currently i am reserching a few options and trying to validate the strength of the defender axle casing (i have an exciting experiment in the lab a couple of weeks where we are going to test a casing to destruction in a torsion load cell) I have had quite a god look around at the options availiable, mogs, volvo and projects people have undertaken as one offs. My aim is to have design fully validated, build them and test them and then begin marketing them. Currently i am considering: -tradition geared drop boxes -Chain driven like that of land rover's very own Ag-rover -Hyvo chain driven -Belt driven (the crazy out there, but strangely attractive option) Are people interested? One of the options i am thinking through at the moment is the issue of hub reduction, obviously an attractive option for reduction of stress on half shafts etc but also reduces the top end speed of your defender. As defender owners, if you were to fit portals would you prefer it if the final drive ratio stayed the same(hence same top speed) or do you consider the hub reduction as more important? cheers, Luke
  7. im doing a project at uni trying to design some bolt on portal axles, just getting my head in the game and learning what is already out there, does anyone know what truck these simca's are from?
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