Bubblegum drawings

I spent a day with the Redondo lowracer ...
taking fotos and doing full scale drawings.
Ostensibly this is for Smitty to make one for himself ...
or plans for someone else to make their own.

The drop-outs were easy ...
I held the paper right up against them and outlined them.
The rest of the form (frame) was kind of iffy ...
because it isn't exactly flat ... I was sorta outlining it
with the pen ... then straightening the lines,
and getting the proper widths.
I did manage to get all the critical angles
with a large woodshop protractor

Mach2 - latest changes

At this stage ... I have a different fork on the front ...
Not sure if it is raked too much ... have to ride it and see.
I used an adjustable angle pyramid neck.
And I stuck a seat on it.
I need to throw a few more parts on it, ride it, and see what to do next.

Rather than 90° bending a tube ...
I heat bent a "U" which connects thru a delrin plug/tube.
That's a 1" EMT tube welded to it.

At the top end of the steering tube ...
I inserted a smaller tube with an inside diameter of abt 7/8".
So I could insert the steering gooseneck and handlebars.

Here's a sideview of that front fork ...
I'm still thinking about that ...
may go with a different fork ... we'll see.

Done! _ Braking Solved ...

Finally solved the braking problem with the trike ...

$50 plus shipping & handling

gives you this Avid BB7 disc brake ...

which will skid the rear wheel (much to grandson's delight).

That other disc brake just wasn't stopping anything.

At last! I am done with the headache of this project.

Now I can get back to working on the Mach-2 ...

and making the jig for a Bentech SWB recumbent.

I still have the tubing for another Lowracer & another DeltaWolf.

Fotos for A.D. Carson

A.D. Carson sent me an email requesting some better fotos of the Mach2 ... particularly of the welding on the bottom tubes. The lines of the bottom tubes looks pretty good. My welding is NOT all that great. All I can say is that I manage to stick things together. And use a grinder to smooth the mess out ...

This is where the bottom tubes connect to the Bottom Bracket.

Needs more grinding ...

Topside view of bottom tubes connecting to the rear triangle.

Bottom view of the bottom tubes connecting to the rear triangle.

Side view of bottom tubes connecting to the rear triangle.

I like the way the lines flow without too bulky connections.

Mach 2 Update2

I welded on the bottom tubes ...
This is an indoor shot at night so it isn't well lit and I couldn't reall get back far enough to get a good side-view shot.

This is a shot of the front end.

I ground off the stubs and welded the bottom tubes directly to the BB
This gives a cleaner line directly back to the rear.

I did some hacksaw cuts so the tube ends would overlap the portions of the rear forks. This made for a cleaner looking transition. Also tacked the seat tube to the bottom tubes.

Slow Progress ... Mach 2

Several years back, I cut up this bicycle to make a Mach 2 designed by A.D. Carson. It's kind of like a Tour Easy clone, but with a lower frame profile.
Anyway, I've finally started to work on the frame ... It was all kind of rusted and such ... so I've sanded, still have to grind the welds, and add the bottom tubes. Then I'll make a seat for it ... bend up some EMT tubing and weld it together. Then I'll have to seriously experiment with USS (under seat steering).

This is the view from the end ...
It's not too far out of whack ...
I'll tweak it some more before I weld the bottom tubes on.

Here's a look at the front triangle.
You can see that I ground the former bottom tubes off the bottom bracket (BB). At the moment it has a Schwinn front fork which has been modified for a 20" wheel. And, from the decals, you can tell that it used to be a "GIANT" bicycle. The Salt Lake City registration decal reminds me that I bought this bicycle from the D.I. Thrift Store in
St. George, UT. As I progress ... I'll show more fotos.

Finished Product?

This young fellow can't keep his hands off what is supposed to be his older brother's trike ...
Guess which one is most likely to ride this trike ...
2/3 rd's of the time ... probably this grandson.

This is a front quartering view.
16" front wheel
Geartrain from 24" bike

Right side view.
Pink steer rod from my "Bubblegum" lowracer.

Rear view.
S&B fiberglass seat with cover.
20" wheels

Here's a video of him riding by
just to show that it works.