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DannyC
08-12-2014, 03:15 PM
So,

I finally plucked up the courage to cut the fishmouth into my main tube for the cross-beam. :surprised:

The wheelbase will be around 42-43 inches I think.

I need to adjust things a "TAD" because the measurements look to me to be 2 degrees out of true. :taz:

It seems to be a bit "harder" working with round tubes rather than square/oblong ones. :dunce2:



http://s5.postimg.org/a23qc58ir/P1030244.jpg (http://postimg.org/image/a23qc58ir/) http://s5.postimg.org/9qm9zds2r/P1030245.jpg (http://postimg.org/image/9qm9zds2r/)

Still, as Taffy said...Never say "Die".

I'll get there.

Twinkle
08-12-2014, 03:27 PM
Im still using the spirit level on my phone but I have just ordered a inclinometer from flea bay I hope it gets here sooner than those freewheels

keep up the good work

regards emma

DannyC
08-12-2014, 03:45 PM
My inclinometer is a really cheap "Silverline" one 6.99 on flea-bay.
It is quite good (for the money).

Will (hopefully) adjust the cut and tack/weld it up tomorrow.

flat
08-12-2014, 04:02 PM
So,

I finally plucked up the courage to cut the fishmouth into my main tube for the cross-beam. :surprised:

The wheelbase will be around 42-43 inches I think.

I need to adjust things a "TAD" because the measurements look to me to be 2 degrees out of true. :taz:

It seems to be a bit "harder" working with round tubes rather than square/oblong ones. :dunce2:
I'll get there.
Sneak up on it Dan. LOL
Round is harder in many ways. It rolls, no index facet, T-joints can't be butted without FM relief cut, circular welds are tricky to keep on the line... And much more.

You are getting there, in fact.

darnthedog
08-12-2014, 04:20 PM
It is actually why Brad uses square tubing in his plans. Much easier to determine center up and down. But you are not the first to challenge round tubing or the last I 'do venture. So hang in there as we all know it can be done. The challenge is in the doing. But it is all in the name of fun. So hope your having loads of it.

flat
08-12-2014, 04:33 PM
Above all, get a round-tuit. :jester:

tman
08-12-2014, 05:23 PM
what if you lay the main pipe on a level surface roll it to get proper angle on the head tubes and tack weld a small pipe along side to hold that angle and one in the middle where you want the notch center hole saw it in groove between the two pipes to get a half circle cut in boty then cut welds and weld cross beam to bike. hope this is understand able ad helps

DannyC
08-13-2014, 08:07 AM
I made some minor adjustments to the fish-mouth with a file and the fit is now within a half of a degree (indicated).
I think that will be close enough over these lengths. The "cross" formed by the intersection of these two pieces is pretty much square too!

I went to tack it up only to find that my gas bottle is empty (it must have a very slow "leak" because it wasn't when I last used it).
Exchange bottle will be here tomorrow though so that's good.

Going to order the bearing sets for the head tubes next.

darnthedog
08-13-2014, 09:41 AM
I went to tack it up only to find that my gas bottle is empty (it must have a very slow "leak" because it wasn't when I last used it).
Exchange bottle will be here tomorrow though so that's good.


When done welding for the day be sure to shut the bottle off. It could be coming out of anywhere- The bottle fittings themselves sometime develop leaks in the flange seals. So when not welding to save on gas shut the bottle off in the future.

Glad to see you back from Cyberspace.

bambuko
08-13-2014, 10:36 AM
What you need Dan, is the tube holders, like this:

https://lh3.googleusercontent.com/-Ot88Ou-1Ctw/U-t2zBZTzuI/AAAAAAAAPOA/CGXQu7Jz9-c/s800/IMG_8158.jpg

Made out of hardwood, will last you lifetime of projects (note the grain direction, for strength).
And if you make them in matched pairs, like so:

https://lh5.googleusercontent.com/-z6lpV42K9i4/U-t21nVHKVI/AAAAAAAAPOA/0SKHIl-noDc/s800/IMG_8160.jpg

they are very useful in jigging/setting up for welding as well.

DannyC
08-13-2014, 11:28 AM
Thanks Bruce & Chris,

I had the bottle tap turned off (well, hand tight at least - as I do after every session) so I'm not sure where the leak was, no matter really, the replacement will be here tomorrow.

Interesting idea on the wooden blocks, are these instead of or as well as Engineers blocks?
Only problem is getting them made up I suspect. I don't have the facilities to make them here.

I weighed the two main frame parts yesterday and it comes to 20 pounds for just the 2 parts shown in the photo's in my original post (excluding the G-Clamp), so I think this is an improvement over the current trike.

bambuko
08-13-2014, 12:00 PM
I use them instead of v-blocks.
They are better in as much that they do not squash and distort the tubes, but the downside is that they only work for one size.
Making them accurately with simple woodworking tools might be challenging but not impossible?