Quad 2 ctd
I have been avoiding things I don't really know yet. One of these things has been the actual motor stuff. I had picked up a car seat motor with a 7/16" diameter,non-standard threaded worm gear shaft. It runs at 190 rpm. After much gnashing of teeth, a gear ratio of 20:1 was arrived at for elevation, and a consultation with McGuire Breaing here in Seattle got me to take this in two steps- a 12 tooth spur gear on the motor to a 60 tooth (5:1), which has a 15 tooth on the same shaft going to a 60 tooth on the main gun axle (4:1). Great!
Except-
The 12 tooth can only have a 3/8" bore in it.
Grr.
Cool, right?
Wrong. I overshot. It is now too narrow. I have another one coming sometime next week. Then I get to try again. The kicker is, I can't chuck it up so I can test the gear as I go, because the white plastic gear on the shaft a)won't come off (a good thing in general), and b) won't fit inside the chuck of the lathe.
Heavy sigh
Alright, back to cosmetics
I started building an enclosure for in between the blast chambers so the workings of the gun are hidden. I will find a way to greeblie it up so it doesn't just look like a plexi box, but for now...
I also changed from the 6:4 PVC reducers in the back to 6" couplers. It makes this look cleaner.
This is the point when the Celebration news came down, just for continuity's sake. This last Wednesday night, instead of working on the quad during down time, messed with a different project. It was frustrating.
But, after a couple of conversations with the folks on the project, we all agreed that the show would go on.
So, yesterday I started tackling the issue of ballast. First thing was to make a cradle for weight. I may have mentioned before I am a stagehand, and on stage we use "bricks" (stageweights ,pigs choose your nomenclature) to counter the weight of flying pieces.
A brick (actually a quarter brick, about 7 1/2 pounds in this case- it varies all over the place)
A 1"x 1" tube about to become a retaining device on the brick
That got welded into the ballast section, to be used later.
In the meantime, reinstall the axle (yes it will have to come out again to install a gearbox, don't remind me)
Attach the ballast section
Side walls
And realize at this point that, your idea to not have to lift as much weight by leaving the barrels and blast chamber cones off won't work, because of this little screw here on all four of the reducers.
Yeah, that one, that's so out of focus and hidden behid the aluminum. It's there.
OK, take off the side walls.
Screw on the barrels. (tiny little screws
Install the cones
THEN put the side walls on. Put the yoke on (no pictures, sorry)
Get a friend to help you lift, because this thing is now well over 100 pounds and more than a little awkward.
Put on the aft shell
AND....
.
At this point, only the side walls have any primer on them. The HIDs (the lights) kind of wash the rest out, so it doesn't look too bad, all things considered.
This is what the ballast section inside looks like, without the shell on
The bottom wafer is welded in. The 2" bricks are 30 lbs each. Figure 90lbs of counterweigh, not including the frame (all steel) or the shell, and whatever else ends up getting added.