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  1. coln72

    Enclosed trike / Velomobile dream

    CrMo is not that hard to get a decent weld, I can use a MIG to weld it and produce a strong joint. Its just that it is so damn thin it blows into holes easily. I've also heard of people getting a decent joint by brazing the CrMo, but I do not have any details of this process. Ever considered...
  2. coln72

    Building a tadpole from scratch...

    Nice trike. Looking to make one up for my boys as soon as I get the race trike out of the way.
  3. coln72

    Let's talk torquey

    I currently have a 14t motor gear driving a 63 tooth gear at the wheel with a 20" rear rim. I have a feeling that this may not be geared down enough for my 300w brushed motor. Hoping it will be able to take off from a dead stop (it does now but half of it is missing). Once rolling will be...
  4. coln72

    Enclosed trike / Velomobile dream

    Last years race trike weighed 24kg on the track :P The petrol pedal hybrid sits around 46kg.
  5. coln72

    Enclosed trike / Velomobile dream

    Thanks for that. The skeleton of the pictured trike (second pic of the uncovered frame) took a hit into the barriers at approx 50km/h and survived. It bent but I do not mind that as it absorbs some of the impact and makes the riders life a little easier in the crash. Every rider has walked...
  6. coln72

    My new build

    Thought I'd throw in an update. Finished the rear gear adaptor. This was a #$%# to machine as I started with a sheet of 10mm steel that I cut a circle out of using an oxy. This hardened the steel so much that it was wearing out the cutting tools and not cutting the steel :evil: Had to...
  7. coln72

    Building a tadpole from scratch...

    yes it is a good read on building trikes.
  8. coln72

    Enclosed trike / Velomobile dream

    We use "coreflute" which is used for signs. Its water proof, relatively stiff but can be bent, its available in different colors and thicknesses. Most of all it is cheap. You can buy a 8' by 3' (I think) sheet for under $30 Aus. Can do a complete canopy including floor with two sheets. Our...
  9. coln72

    Building a tadpole from scratch...

    Try http://www.greenspeed.com.au They are represented in the states as well.
  10. coln72

    One Cat Just Leads to Another.

    Ever thought of grabbing another front derailer and using it to lengthen the cage on your existing front derailer??
  11. coln72

    Biggest Chainring

    Picture angle - it was round
  12. coln72

    Project #3. Two motors, Three wheels, Six grand!

    Second that :mrgreen:
  13. coln72

    Biggest Chainring

    You could go straight to the horses mouth so to speak and contact Greenspeed direct in Australia. Have run one of their 80 tooth rings on a trike in the past when I was running a 16" rear wheel. and now have one on my pedal powered battery charger to help get the 18:1 ratio I needed for it...
  14. coln72

    My new build

    Well, I am getting sick of letting the kids (most of them are academic students) work on the trike - seems that I am fixing more of their stuff ups than actually going forward. Yesterday was spent making a new adapter to go over the freewheel to hold the 63t rear sprocket after the original...
  15. coln72

    One Cat Just Leads to Another.

    We used to make our own but you are right Amberwolf, it is a PITA. We now source them locally from a guy that gets them cnc machined. http://www.jacksonbikes.com.au/index_files/Page4719.htm I couldn't make one for the cost.
  16. coln72

    Cheapo motors..............

    After what happened down here in Oz this year, I hope the closest you see that fire is from your front lawn in the distance and all you loose is your favorite trail. Remember to stay safe and one of the stupidest thing in the world is to try and defend an insured house if it gets to that situation.
  17. coln72

    My new build

    I was looking to use the clutch on the electric motor to give it a bit of revs so we are not starting from a stall condition. The ICE set up really needs the trike to be mobile before it can be used. The motor is started by dropping it onto the rear tyre. I feel that this will only be used to...
  18. coln72

    My new build

    Thought I'd throw in an update. IT MOVES!!!!!!! Had the trike moving under electric power this morning :D Imagine a 6', 86kg guy riding in circles with his feet in the air (nothing forward of the front axle). Lots of strange looks from the students :lol: The team members took it out for a...
  19. coln72

    MTB Ebike Cornering

    Not sure how bike shocks consist of but if they are filled with oil, a standard trick for motorbike and cars that compete in showroom stock categories is to drill a small hole and drain the existing oil out. Then the shock is refilled with heavier weight oil and the hole carefully repaired...
  20. coln72

    Biggest Chainring

    lets man up peoples - 80tooth chain rings are the go. Available in both 130 and 110 pcd's. Exxy at $290 Aus though. From http://greenspeed.com.au or these 80 tooth jobbies in both pcd's for $200 Aus from http://trisled.com.au/
  21. coln72

    My new build

  22. coln72

    My new build

    double post sorry :oops:
  23. coln72

    My new build

    motor specs from web site http://74.125.153.132/translate_c?hl=en&sl=zh-CN&tl=en&u=http://www.unitemotor.com/ProductView_32.html&rurl=translate.google.com&usg=ALkJrhhLluWjhf_ENPKIMC-rMAM2GyQa3A
  24. coln72

    My new build

    The reason I am not using a hub motor is cost. At the moment I have a budget of approx. $1000 for the build so I am recycling a large number of components from previous trikes. This is why I am using the electric motor I am. It is a "unitemotor" unitemotor.com model number MY1016. Its...
  25. coln72

    My new build

    G'day all, This is my first post so be gentle :) I guess this is the right area to post. Thought I would give a brief run down of the trike that I am currently working on. It is a electric/petrol hybrid designed to compete in a 24hr race against other schools. The event is the RACV Energy...
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