Lifeboat Farm


Water ram pump
March 17, 2009, 3:29 pm
Filed under: Technology, Water

We are very fortunate to have a prolific spring on the property that supplies all the water we need. While we currently use petrol and diesel-powered pumps to move the water around the farm, we have always planned on using more sustainable methods.The first step is the installation of a water ram pump.

Ram pumps work on the principle of harnessing the “water hammer” effect – when you suddenly stop a descending column of water, the force produced is much greater than the weight of the water alone. This force, when used in a cycle can pump water considerably higher than the level it starts from. Water flowing downhill is passed through the ram pump and most of it is returned to the flow downstream while a small amount gets pushed up the hill. It’s inefficient but a small flow of water 24/7 using no external energy is a pretty good deal. Our ram pump delivers a constant 4L/minute to a header tank 40m above the spring.

ram_pump

The ram pump before installation. It only has 2 moving parts (both valves) – one visible and one inside the base of the dome. Wikipedia has a good overview of the how ram pumps work. While there are plenty of references available online I was fortunate to get the original instructions with my ram pump.

ram_pump_stream

The ram pump installed at the lowest point I could practically manage – about 4m below the point at which the water is collected. To the right of the pump is the path of the spring. Water that sprays out of the pump as waste will drain back into the stream. I still need to put a cement base under the ram – it will be in danger of hammering itself down into the bank otherwise.

ram_pump_drive_pipe

The drive pipe heading down to the pump. It’s just over 30m of galvanised 40mm (inch and a half) steel pipe. There is a gentle bend in the pipe to get over some immovable rocks. The ideal is to have a perfectly straight, rigid pipe to minimise water friction but a gentle curve is better than sharp bends.

ram_pump_reservoir

The reservoir at the top of the spring is made from a 200L plastic drum cut in half and lined with polythene. This ensures the drive pipe is always full and gives any sediment in the spring a chance to settle before the water goes to the pump. The inflow on the right is the overflow from the neighbour’s water catchment.

Here is a small video clip of the pump in action

Lessons from my installation

While I mentioned there are plenty of resources online regarding hydraulic ram pumps, most are related to theoretical performance and pretty diagrams of how the pumps work. Here are a few lessons I’ve learned from trial and error (and wish someone had told me before I started).

First up, and this is not a good thing to hear if you are considering “having a go” like I did, you have to set up the ram exactly as it’s going to be used in order to test it. As I will explain in the points below, there’s no dry runs, loose fits or shake-downs. Unless the ram pump is set up completely (and properly) it just won’t go. I spent a good number of frustrating hours trying to troubleshoot the operation of the pump before I realised this useful point.

The drive pipe – needs to be as rigid and straight as possible. It must be airtight for the pump to work. I did a loose fit test with everything assembled and air was getting in the pipe. Water does not compress but air does. Air in the drive pipe cripples the pump and you will get erratic cycling or none at all.

The reservoir – needs to have enough of a store of water to ensure air never gets in the drive pipe.

The ram pump – needs to be level for the valves to operate correctly and efficiently. Installing valves on both the drive pipe entry and the exit to the delivery pipe is a good idea to save you having to refill these every time you fiddle with the pump. The drive pipe valve acts as the on/off tap for the pump.

The delivery pipe – needs to be attached and be at the correct length and height. The reason for this is the weight of water in the delivery pipe, at the required height creates backpressure at the pump which balances the pressure of the water in the delivery pipe. Without the delivery pipe connected the pump will never cycle freely. My first instinct was to get the pump working, then attach the delivery pipe. This single tip would have saved me hours of cursing and tinkering and hopefully it will save you some time if you undertake a similar project 🙂

After all the planning, work (and a fair bit of swearing) I forgot to mention the absolute joy you feel the first time you see the pump cycling, delivering water with no external energy.

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Saving squash seed
March 17, 2009, 10:32 am
Filed under: Food, Garden

We had some delicious roasted gem squash with dinner last night. I’m saving the seeds and hopefully we can grow some next summer. These squash came from a market so we don’t know exactly how they were grown. If they came from hybrid seed then plants grown from these saved seeds will revert to one or other of the parent plants. If they were open pollinated then they should stay true to type for at least another generation. If they turn out to be nothing like what we want then the pigs will be happy.

squash_gem

Scrape out the seeds and put them in a bowl of water – the seeds will float to the top. If there is any flesh sticking to the seeds, give them a stir and it should fall away.

squash_seeds

Skim the seeds from the water and spread them on a paper towel to dry overnight. When they are dry, put the seeds in an airtight container in a cool dark place until you want to plant them. Well dried and stored seed will stay viable for several years so if you’re happy with the result of the first planting, you could keep the rest of the seeds for subsequent years.

squash_seeds_dry



Lessons from the garlic harvest
March 16, 2009, 10:05 am
Filed under: Building, Food, Garden, The House

Our garlic harvest was pretty modest this year. Considering the neglect it had to put up with I’m surprised we got any at all, let alone harvesting more than we planted.

garlic_dried

Next planting we’ll definitely do better but here are a few lessons we’ve gleaned:

  • Prepare the bed well. Don’t just turn over some sod and shove the cloves in. A fertile, friable bed that’s weed free is best. If it’s a raised bed, even better for drainage and warmth.
  • Keep the garlic weed free. In our case the grass from the pasture came back with a vengeance, competing with the garlic for moisture and light. When it came to harvest, finding the garlic among the long grass and occasional thistle (ouch) was difficult. We might even try planting the garlic through slits in a strip of carpet – it worked well for the strawberries this year.
  • When your Father in law helps by mowing around the gardens, be very clear about where the garlic is hidden so some of it doesn’t get an untimely haircut.
  • Harvest in six months, more or less. Traditionally, you plant garlic on the shortest day and harvest on the longest. It’s a good idea to dig up a couple of plants each week from 5 months onwards. That way you can tell the best time to harvest it all and you can pick a warm, dry day to dig. The less moisture on the garlic when you dig it up, the better it will dry and keep.


Preserving apples
March 15, 2009, 9:49 am
Filed under: Building, Food

Our rural road is about 5km long and has many “wild” apple trees growing along the roadsides. Presumably over the decades, children waiting for the school bus have dropped their apple cores and some have resulted in apple trees. While it’s unclear who actually owns the resulting apples, they do seem to go to waste much of the time. This year, we thought we’d put some to good use. An hour of collecting gave us these jars of apple preserve (for pies, desserts, applesauce etc) and a few Kgs of frozen apple slices. It’s tempting to sow a few more “random” fruit trees on the roadsides to see what else we could harvest in years to come.

apple_preserved



New pigs arrived
March 14, 2009, 5:58 pm
Filed under: Food, Menagerie

We arrived home with three weaner pigs this afternoon. They are destined to be bacon, ham and salami in about six months. Names haven’t been decided on yet but they will be suitably food-related so we don’t get too attached.

pigs_in_truck

Tonight they will stay in the stables (in their little straw house) and tomorrow they’ll go to their new home, free-ranging in our wood lot.

pigs_straw_house

Here they are discovering the feed trough.

pigs_feeding



Raspberry update
March 14, 2009, 5:46 pm
Filed under: Food, Garden

Back in October we planted some raspberry canes. A few months on they are doing really well – we have some small fruit forming and the plants are sending up new canes. We were originally concerned we’d have to lift the carpet to let new shoots up but it seems the carpet has rotted enough already that the shoots just push through (one less job to worry about).

The next job will be to establish the canes as separate plants so we can plant more in other spots on the farm.

raspberry_sprouting