Sunday, May 21, 2017

Rain stops play... again!

This weather is ridiculous. Hot and sunny one minute then pouring with rain and thundering the next. How am I supposed to get anything done?

The sum total of today's work is nothing much. I went over some of my welds again with a different rod. Then I filled in the two screw holes I drilled yesterday using my welding rod. Then I ground my welds smooth and drilled better placed holes to attach my CPU fan. I only drilled two holes because it's not a high stress application. I added a pair of brackets to the CPU fan mount that will allow me to install a separate top on my ventilation duct.
Then an epiphany struck me. Instead of making a square box structure, I could take a piece of flat steel sheet, weld it in place at the bottom then bend it upward to make a natural curve that would ensure ingested water would find a way out. Cutting the sides would be more interesting but welding shouldn't be any harder. Of course, by the time I'd grabbed some steel sheet to cut, it had begun to rain and I had to hurry indoors.

Talking about ideas, I looked into water heating. For $100 approximately, it's possible to buy an electric instant water heater. It takes 27 amps but my breaker boxes could be readily rewired to 50 amps. I have a 20A cord that could be replaced by a 50A cord. There's nothing remotely challenging there. I'd been thinking of adding a water inlet anyway. There's nothing to say hot water has to be supplied to the handbasin and not just ported in a jug from the shower.

Similarly, I've been considering a flush toilet rather than my current dry toilet. I'd have to install a septic tank but now that my welding is getting better, I see no reason why a modified beer keg could not be used. I rather suspect that whatever I flush into a beer keg would be far better than what was in it originally.

There is no limit to the upgrades it's possible to do to a motorhome. This ventilation system was unplanned but given the 100F inside yesterday, seems necessary. Once it is done, I might have to add more solar capacity. It's something I'd been thinking of anyway. 

For the moment, the plans are thus...
1. Install ventilation unit.
2. Fix 120v wiring.
3. Wire wiper switch.
4. Get the bearing steamed and greased, the kingpins checked, the pedals sorted out and work the short out of the electrics.
5. Retitle as a motorhome.

Saturday, May 20, 2017

Harbor Freight didn't have it!

No Saturday is complete without a trip to the hardware store. Today it was a trip to Harbor Freight to look for some 309L welding rods. These are barrier rods that allow me to weld stainless steel to mild steel. Harbor Freight had only 6011, 6013, 7014 and 7018, each of which is fine for its purpose but not for what I wanted to do. They did, however, have a multi pack containing two grinding disks, three flap disks and 5 cutting disks. That proved a valuable find!

I continued my hunt for welding rods but while Northern Tool had 308L and bronze rods, no 309L. It was the same story at Home Depot and Lowes (hiss, spit). In the end I didn't find my 309L rods but I did find some 312 rods at Tractor Supply. They were horribly expensive!

Back on the ranch, I pulled out my stainless tube and found a spare stainless sink tailpipe. The tube screws into the tailpipe. My idea was to weld the tube to my ventilation box. Things are in constant flux though. As I cleaned up my blobby welds I realized there are various alternatives to my plans. Of course, if I'd built the thing from plastic planking, I'd have been done and dusted a while back! I decided to go durable though and that means steel and welding.
Looking at the stainless sink tailpipe, I realized I had found my ventilation inlet. All I need do is to make a 1.5 inch hole and pass a new tailpipe with a nut through the floor. It's straightforward then to put a tube between the two tailpipes. This could even be as simple as a piece of large diameter Pex hose pipe held on with jubilee clips.

The holes for the fan didn't go in the right place, sadly. I decided to drill two holes rather than 4 because it's not a high stress activity. As the nuts for the number 8 bolts are somewhat small, it's not possible to weld them in place. That had me redesign my vent a little. I am designing it so I can replace my fan if required or even remove it and replace it with a small but potent bilge blower. Today aside from the two holes (which I might redo tomorrow), I decided to add a flange to the top of the unit that I can screw a top onto. I prepared all the surfaces and will get onto that tomorrow. The bottom also needs to be removable in order to also facilitate easy fan replacement.
The temperature outside the bus was way cooler than inside. Inside it was 100F while outside it was 80 or 90. When fresh air is coming in, the temperature will be much cooler. The shower tailpipe will be a great ventilation inlet as it can be stood on without issue and can be laid flush with the floor. Indeed, when I next visit the hardware store I might get a larger diameter tailpipe for the bus interior as I feel I might yet end up with a bilge pump.

In my redesign of the top of the ventilation unit, I decided to make the top removable in order to make access to the fan easier. That allows me also to upgrade the pipe at the top of the unit to a larger size by simply making a new top plate. That will allow for an upgrade from 1.5 to 2 inches for a 2 inch bilge blower.

I was beaten today by the heat, humidity and mosquitoes. Thus, after planning my flanges I headed indoors. Tomorrow I shall weld together the rest of my filter box structure, weather permitting, and make a start on the top and bottom. The door is going to be very simple. I'll just solder a nut to the back of the flange

that I'll install on the edge of the filter box. Rather, four nuts. Once the door is bolted on with lock washers, all should be fine. For security, I suppose I could use 1/4 inch torx bolts. The door can be very simple - a rectangle of steel with a single vent and a rib that presses the filter into place.

One of the other things I got today was a set of small grinding wheels for the pistol drill. Those will be handy for cleaning blobby weld on the inside of my frames. I'll try to clean those tomorrow too.

Sunday, May 14, 2017

Welding again

Today started with a plan. Yes, I have them occasionally! Anyway, the plan was to work on the ventilation system. Had I the bravery to put roof vents into my bus, a powered ventilation system would be unnecessary but I'm not going to poke holes in a perfectly good roof fir whatever reason!

I started by welding a small square of angle together. I felt really proud when I'd done it. Then I noticed how warped my creation was and then how one angle wasn't right and I couldn't even fit the CPU fan the box was designed for. So, out came the angle grinder and version 2 took shape. Now the reason it was off kilter could have been due to the angle maker I bought from Harbor Freight. While it gets the 90 degrees right, the horizontal hold can slip a little.
 
Above, you can see the fan holder beginning to take shape. The plan is to have the fan at the top and the filter on the front of my ventilation unit. It's done this way to try to keep water out of the mechanism. The next challenge will be a vent and filter changing door. For that I'm leaning toward a removable door that presses the filter into place and just screws on.
That's the unit so far. I was wondering how to attach the fan. I'd been thinking of a spring clamp. Then somebody suggested making the bottom removable and using ordinary screws. Well, I could do that but M5 is way too big for the holes in the fan. 10-24 is also too big. I'll have to try smaller bolts. The best solution would have been roof vents but as my bus was not equipped with emergency escape hatches. Thus I have to do what I can. This might not be the full solution but it should help. The white roof and the heat extraction fans have already helped. If necessary, I can always upgrade the extraction fans to something more powerful. For $30 each there are CPU fans that claim 200 cubic feet per minute. My bus interior is 24 feet by 6 feet by 7 feet approximately or around 1,000 cubic feet though it'll be less because of stuff inside. That'd take two fans at a combined 400 CFM around 150 seconds to expell all the air in the bus. For the mention though, I'll go with what I have planned.

Saturday, May 13, 2017

Bring me some wine!

Today being wet and arc welding not being the sort of activity those desiring a long life expectancy should carry out in rain or wet weather, the plan was to work inside the bus. Originally the idea had been to work underneath the counter and fix the faulty wiring on the one socket. The rain and general dismal nature of the day killed that idea though. It wasn't really possible to see. Mind, I am also exhausted after the working week. Driving school busses for a living really takes it out of me. It's the kind of day for a jug of wine and something not too complex.

As the bus badly needed tidying inside, I set to. Rather, I would have set to but needed containers for all the loose bits and bobs that have been floating around in cardboard boxes. The bus looked like cardboard city inside! A trip to Dollar General was in order where they had two packs of three plastic food boxes. Just the ticket! Needless to say, I also had to stop for fuel. My little SUV isn't bad at 19mpg but 18 gallons (which is what I usually put in) doesn't last more than about a week. Thank heavens fuel was only $1.95 a gallon!
I set to, filling plastic boxes with bits. I decided one box would hold metal and wood screws, another metric stuff and another imperial. Most of my metric stuff is M5. I had another box for odd stuff like brackets and hinges and yet another for unsorted random bits that were lying around. After a while, I was amazed. I could actually see a patch of countertop. Well, I threw out a couple of boxes of absolute junk. A couple of dead bugs, plastic packaging, dull razor blades etc.
This tidying lark is definitely not for the faint of heart. Once I've done tidying, I'll have to go through everything in the bus again. I'll have to decide which clothes to keep and which to donate. The same for a lot of other stuff. I'm overloaded with a lot that's just plain junk. It's very different from the day I arrived in this world with not a stitch of clothing or the way I arrived in America with just one suitcase! The aim though is to clear up construction debris at the moment. I need to be able to see what still needs attention.

As far as I know, things I need to do are to add a forced air ventilation inlet and complete welding the ventilation unit together. Then there could be security bars added to the back window. I need to touch up the outside paintwork. The wiper still needs to be wired correctly at the switch end and I need to check the kingpins, steam and grease. The last part, steaming, greasing and checking thevkingpins probably needs to be done by a real mechanic. Not a work mechanic who's doing it as a favor but somebody interested in being paid to do it. It costs more but the results are far more satisfactory. I learned a long time ago people doing things as favors etc do a half assed job - the same as those miserable trade deals.

Thursday, May 11, 2017

Overheating

Today was horribly hot at 97F inside the bus. I made the mistake of wearing jeans which didn't help either! Put simply I didn't do much as I spent the day feeling the effects of the heat.

I have had various ideas about putting an outside air intake into the bus. One was to put an intake under the bus. That would have been simple for installation but not for changing the filter. Another was to put the filter and fan inside the bus skirt with air being drawn through a vent through the skirt then pumped through the floor. That all seems a lot of work though!

The latest idea is to copy the existing vent in the side of the bus and pull air in through the side and pass it into the cabin through a filter. After looking at the existing intake, it seemed rather much of a challenge to use it but that might be possible. It merits further investigation.

While I was out today - being my birthday I had the day off from work - I browsed Lowes looking at things for my ventilation plans but ended up buying nothing. I looked casually for plumbing parts but decided not. In the end, the only money I spent was $2.53 in Starbucks for some very mediocre coffee.

Returning home, I cut some more angle iron ready to weld together to hold a CPU fan but did no welding. It was just too hot. Maybe the weekend will be better.

Sunday, May 7, 2017

Moving swiftly onward

The other day, in the store, I looked at water solutions. I'd been thinking about plumbing supplies in order to put a simple faucet inside the bus connected directly to a mains inlet. There are so many plumbing parts on offer that the whole thing is looking pretty darned confusing. I decided to let the matter rest for the moment or at least until as I wrote this, I wondered about putting a 5 gallon bucket with its lid securely attached, connected to the water supply but with a float so it acts as a cistern. Water can then be pumped out as needed with the advantage that if the float failed or the water pressure got too high, the lid would pop off the bucket rather than flooding the bus.

Today started with my looking again at my wiper system. The motor was jumping and clonking at one point in the cycle. That, I identified as a bolt that was fouling the rotor arm. A few adjustments later and the bolt was correctly fitted and the arm was no longer being fouled. While I was st it, I adjusted the wiper orientation so it is now identical to the other wiper. There is one tiny fault in that my wiper shaft is not quite horizontal. It's not far off and it does work so I'm not too bothered.

Having done that, I briefly considered fixing the one 120v socket but as it was a fine day, I decided to leave the socket for a rainy day. Thus I thought about the steel angle and steel flat stock that I bought from Tractor Supply. It being a fine day,  I pulled out my angle grinder and my welder. The plan was to make a start on my forced air ventilation system.
In Harbor Freight on Saturday, I'd picked up an angle clamp that would hold two objects together to be worked on and keep them at right angles. I was very careful, welding. I just tack welded since the material then took it out of the clamp in order not to destroy the very lightweight clamp. Once I'd removed the work, I clamped it to a steel girder to complete welding the angle. I had to wait for it to cool before rotating to weld the other side. Each angle was two welds and two sets of waiting. Thus, it took quite some time. Eventually though I was rewarded with a completed frame, even though it was very slightly but totally usable warped.
As can be seen, my little Honda lawnmower engine filter fits very nicely inside, as intended. The plan is to mount the engine filter behind a louvered door on the bus skirt then put a CPU fan behind the filter to blow cool, cleaned air into the cabin of the bus via plastic plumbing piping.
Now you should be able to grasp an idea of the concept. My next problem will be to locate a funnel to reduce the tube cross ection to 1.25 inches in line with the size of pipe I wish to use. I'm choosing that size because that's the size of my hole saw. Bigger hole saws just cost money and I'd really prefer to speed up the air flow anyway, which is what the funnel will do.

Now, I'd been thinking of a door but as I wrote this, I realized I don't need an actual door. A single louver could just hinge upward and be secured by simple screws at the bottom. The only thing I'll have to wait on is installing my ventilation unit. That will be dependent on my forthcoming front solar panels and my being able to get underneath the bus again.

Saturday, May 6, 2017

Wiper working

A few days ago, I bought a bronze roller bearing. That, I slipped into the wiper transmission and over the 1/4 inch bolt. The wiper system worked and the wiper even self parks. I'll have to carry out more adjustment because the motor arm is in the wrong place so the wiper clunks badly. It's just minor adjustment of the motor arm and a bugger adjustment of the wiper arm. This is what they look like right now.
While I was out, today, I bought some steel angle to weld together to make a holder for my Honda engine filter. I'd been looking for a ready made door that I could put on the outside of the bus but it seems I'll have to build that too. So, I got a few other bits to help me make the frame etc in perfect proportion. Welding is always tricky! I have enough steel from old fridges to make a decent housing.

In Lowes (hiss, spit), there was a length of 10-3 flexible cable. That will easily carry 30A so I bought the offcut in order to use about 8 inches to fix my one malfunctioning socket. That, I'll probably get to after I've satisfactorily completed work on my wiper setup. That's almost right but not quite. It's just a case of keeping making adjustments. I'm not an expert - this is the first time I've ever done this and I'm learning as I go along.

I wasn't originally going to do any more welding since my welding isn't that great. I'd thought of riveting aluminum parts together to make my new air intake but I think it's going to be better if I try welding again. What I need is a mount for the air filter with a mount behind the air filter for a CPU fan then a door in front of the air filter that presses the filter securely into its mount. Keeping the door closed will be a challenge. I'm considering using a simple slide bolt and fitting a spring behind it to keep it closed. I'll have to modify the bolt slightly in order to make it more usable - unless I encounter a better idea!

The plan with the air intake is just to build the intake with the door, fan and filter then attach it securely to the bus but to leave installing the ducting and the power cable until the critters have all been cleared from under the bus.

As the air filter is 6x4 inches, I'll use a 4 inch diameter fan and put a little funnel to concentrate the air flow into a 1.5 inch tube. That will increase the speed of the air and also allow me to use my existing hole saw to make the new hole in the floor for the air ducting. That might not sound too generous but the bus is small and running consistently, this in combination with my extraction fans will reduce interior temperatures down to around the same as outside temperatures in the summer.