Recent content by madact

Don't have a pic to hand, I'm afraid (it was a while back - a pic was taken but I'm not sure if it still exists, will post if I can find it), but when I got my Antec Solo PC case, I was on a racer with no rack... I tried carrying it under-arm (yes, I have quite long arms) but that got old after...

Sweet! That really came out looking the part :D, nice job doing this as a vacuum form system too, perfect for medium-size runs.

The flat spots seem to work much more nicely than the fat angle - the arc is very controllable, so that's one success. And I was able to get a 'narrow' fillet (3-4mm) with a slightly convex, somewhat 'stacked' effect easily enough (the spodge on the left was a restart): Certainly, the...

Cool, chart validation :mrgreen:... just think, if the chart's right, you could go the velomobile and get another 20mph on top of that :wink: joooiiiinnn uuusssss...

From experience, a 10mm high-tensile bolt is sufficient (12mm would add a bit of safety margin) - so long as the bolt is long enough for about 20mm of un-threaded shank inside the wheel mount, so the shear stresses aren't concentrated on the point where thread transitions to shank. If the bolt...

Not looking for a stack of dimes so much as I'm looking for a nice strong weld that will save my a$$ if I roll the thing at 110kph... I can do a stack o' dimes at low current, one at a time, and still get insufficient penetration (even on this stuff), the name of the game is getting penetration...

That thar, I'm afraid, is an illegal outlaw overpowered hoon-juice piece of prohibited technology down here :roll: Limit is 200W. Peak. We won't be seeing those in bike shops down here unless they change the power output of the unit or the laws of the land - and the proposal on the table for...

Fair enough, I've ordered some 2.4mm (this was using 1.6mm), I'll probably need some eventually anyway. In the mean time, I'm trying the fatter angle anyway (top is what I was using, bottom is what I'm trying out): ... and initial results are promising - much tighter arc / smaller weld pool...

Well, here's my efforts from this arvo: Looking a lot better, I think, but I still get this feeling you're going to say it's not up to scratch yet :wink: The pedal and better fit-up helps a lot, no burn-through problems today. I did notice I'm burning the point off the tungsten when the...

Looking good - awesome chart, sk8norcal, I'll be saving that :D - looks like the windshield could actually get you down to a Cd 0.7, less than a 'high' recumbent at 0.77 (if a little less comfortable with the crouch, but you look like you can take it :D), that's better than I expected. I suppose...

That's one thing I do know enough to avoid! I'm certainly not using anything like that on it, but alcohol isn't the only safe way to get a clean surface... I'm removing the galvanisation with hydrochloric acid (1:4 dilution of 300g/L), outdoors in a well ventilated area, rinsing, and drying (I...

Hmmm, the better beads I was laying today would have been in the 1/8" to 3/16" range... I'll see if I do any better with the pedal Yeah, I read that online today... after I did some welding. My practice pieces weren't fitted all that well, would have had gaps up in the 1/32 to 3/32 range...

Yeah, played with pulse today, results varied somewhat (it only goes to 25Hz, I tried the 1s on / 1s off 'learner' pulse and 25Hz 30% 60A/20A, which did seem to help keep the bead manageable - but not sure if this was just extra practice helping)... think I might take your advice though Whip...

Yeah, I know... this was done 'free hand' (i.e. work piece in a vice, me standing up, not resting hands on anything) in 30 min of my lunch break (including setting up the welder and packing it all away), I'll see how I go with a bit more time :mrgreen:. Also, I'll admit I did dip the tungsten...

Just did a test tigging of a couple of pieces of tube. Semi-destructive testing shows it to be plenty strong, and penetration was OK, but I did get a bit of burn-through and warping, and it's a bit bodgy looking, I was wondering if anyone had some advice on technique (apart from not rushing...