Monthly Archives: June 2017

photo of Cutting 5/8-inch threaded rod

A New Way to Level a Teardrop

photo of Original scissors-jack handle

Original scissors-jack handle

Teardrop Trail Log: June 8, 2017

After three seasons of Teardropping, I still wasn’t happy with my trailer leveling solution. I originally purchased a pair of scissors jacks, but the folding handles they came with were frustrating to use. Also, the jacks had a tendency to fall over before they came in contact with both the ground and the trailer.

Stabilizers Aren’t Perfect

Next I tried stabilizers, and although they had advantages, they didn’t work as well with uneven ground. They were perfect in combination with a scissors jack though. By lifting each trailer corner where a stabilizer was attached, they could be easily extended and provided a rock-solid platform once set.

So, back to the scissors jack. What could I do to improve on the basic Harbor Freight design? I didn’t want to modify the actual jack, but wanted an adapter that would allow the use of a cordless drill instead of the wacky and hard-to-use folding handle.

An Improved Scissors Jack

photo of The scissors jack adapter

The scissors jack adapter

The solution turned out to be very simple. The handle receptacle, a “U”-shaped piece of metal the connects with the handle hook, was large enough to receive a 5/8-inch piece of threaded rod, and then capture a 5/8-inch nut inside the handle receptacle. A 9/16-bolt welded perpendicular to one face of the 5/8-inch nut, would then turn the handle receptacle when captured by the 5-8-inch rod.

photo of Drill driving the scissors jack

Drill driving the scissors jack

I talked with my friends at Vintage Auto, and they had it welded up in a few minutes, and even painted it. Back at the house, I found I could easily run the scissors jack up and down with a 12-volt DeWalt cordless drill. A test on the trailer was successful also — the combination easily lifted the trailer.

We would use it camping for the first time at the Red Power Roundup in Des Moines, Iowa (that’s why the bolt has an International Harvester Red head), and I had the trailer leveled and on the stabilizers in about 20-minutes. A new record!

photo of the scissors jack adapter in use

Scissors jack adapter in use

photo of the solar system with A new AGM battery

A Solar Upgrade for the Teardrop Trailer

Teardrop Trail: June 4, 2017

In the last few months, I’ve been working on a larger solar system to pump water at the ranch. We live out in the Texas Hill Country and occasionally experience power interruptions, and I wanted to use solar power to improve our emergency preparedness. The experience of designing and building that system led me to rethinking the teardrop solar system.

A New Battery

photo of Cutting a hole for the data display

Cutting a hole for the data display

Two 100-watt solar panels provide enough power to meet our modest camping needs, but I felt the battery could be improved. We were using a marine battery, but it was a compromise between high starter current (which we would never use)  and deep-cycle power for camping use. An Absorbed Glass Mat (AGM) deep-cycle seemed a better match. I ordered an Optima D34M Blue Top that could supply up to 55 Amp/hours of power and fit into the modest available space.

And a way to measure it

photo of The new data display

The new data display

Of course, fully discharging any lead-acid battery will shorten its life and normally one leaves at least a 50% charge. How do you know when you’ve reached 50% remaining power? You can estimate from the battery voltage, but measuring power directly would be best. That led to the second upgrade; a digital energy meter. It shows voltage, current and power, as well as the total power in watt/hours consumed since the last reset. Using the Optima battery as an example, I could use up to 330 watt/hours of power ((55 amp/hours / 2) * 12 volts = 330 watt hours) before it was wise to recharge.

Electric Kettles for Camping?

Finally, we enjoy electric kettles for heating water, and they’re perfect for camping. In many campgrounds, shore power is available and we can heat water for tea, coffee and washing up with ease. Would it be possible to use an electric kettle on solar power?

photo showing solar system With 1000 watt inverter installed

With 1000 watt inverter installed

Researching electric kettles and hot pots I found one model that only used about 1000 watts. A lot of power, but within reach of a not-too-expensive 12-volt to 120-volt inverter. It looked like fun to see if I could make it work, and I ordered an inverter and the necessary wiring to hook it up. Besides; the same inverter could be used to power a Crockpot or Slow-cooker — something we’ve already shown is practical.

The picture tells the story. The new battery, inverter and hot pot were connected and did indeed heat 12 ounces of water to boiling. It used 164 watt/hours of energy as measured by the new digital meter — about half of the available battery storage. Not too practical, but a fun experiment!