An engineering problem to exercise the intellect: I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around. I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound? I think mound is the likely answer, but before I move the dirt I thought I'd throw it open for debate whilst I try searching on line for it.
Allan Duncan wrote:
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound?
(Demonstrating my ignorance of all things outdoors...) I thought that if one star picket wasn't enough to tether something to, you just used more star pickets. Presumably that doesn't work here because you'd run out of room for all the pickets?
Allan Duncan wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound? Well just to help with contextualising the problem, can you move pump + diesel without a crane ? if so and providing stability is not an issue (eg rolling over); sinking the whole contraption would seem more likely to stop it walking around ! Is it outside with the possibility the 'bath-tub' will fill up with water ?
regards Rohan McLeod
Allan Duncan wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound?
Well just to help with contextualising the problem, can you move pump + diesel without a crane ? if so and providing stability is not an issue (eg rolling over); sinking the whole contraption would seem more likely to stop it walking around ! Is it outside with the possibility the 'bath-tub' will fill up with water ? regards Rohan McLeod
On 12/01/13 20:14, Rohan McLeod wrote:
Allan Duncan wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound?
Well just to help with contextualising the problem, can you move pump + diesel without a crane ? if so and providing stability is not an issue (eg rolling over); sinking the whole contraption would seem more likely to stop it walking around !
Around 50 Kg. I think a bath tub profile will cause it to walk up the side and tip over.
Is it outside with the possibility the 'bath-tub' will fill up with water ?
regards Rohan McLeod _______________________________________________ luv-talk mailing list luv-talk@lists.luv.asn.au http://lists.luv.asn.au/listinfo/luv-talk
On Sat, Jan 12, 2013 at 7:00 PM, Allan Duncan <amd2345@fastmail.com.au>wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
Air or water cooled the lower RPM of a stationary diesel is a problem in both cases
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy.
Not really, we secured a 1920's single cylinder water cooled (convection with a header tank no water pump for cooling) donkey engine weighing 180+ kgs with stakes and running at 200 RPM and only firing every second revolution it was pretty thumpy. You need to angle the stakes at 45 degrees from the corners both on the horizontal and vertical planes. So from the top your stakes at the corners would run under the corners all pointing to the middle and then from the side they also slope down under the engine TOP VIEW \ / \ / \ / / \ / \ / \ SIDE VIEW \ / \ / \ / \ / Dont use bungee strap but something less elasric like nylon ratchet tie straps, ideally the anchor points on the frame are higher then the top of the stakes thereby pulling the frame and engine/pump down to the ground. We used chains and 4 inch pipe for the donkey but the principle is the same, just scale hardware to suit your needs So, what profile should this pad have, bath tub or mound?
I think mound is the likely answer, but before I move the dirt I thought I'd throw it open for debate whilst I try searching on line for it. _______________________________________________ luv-talk mailing list luv-talk@lists.luv.asn.au http://lists.luv.asn.au/listinfo/luv-talk
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On 12/01/13 20:27, Hiddensoul (Mark Clohesy) wrote:
On Sat, Jan 12, 2013 at 7:00 PM, Allan Duncan <amd2345@fastmail.com.au <mailto:amd2345@fastmail.com.au>> wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
Air or water cooled the lower RPM of a stationary diesel is a problem in both cases
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy.
Not really, we secured a 1920's single cylinder water cooled (convection with a header tank no water pump for cooling) donkey engine weighing 180+ kgs with stakes and running at 200 RPM and only firing every second revolution it was pretty thumpy.
You need to angle the stakes at 45 degrees from the corners both on the horizontal and vertical planes.
So from the top your stakes at the corners would run under the corners all pointing to the middle and then from the side they also slope down under the engine
TOP VIEW \ / \ / \ / / \ / \ / \
SIDE VIEW \ / \ / \ / \ /
Dont use bungee strap but something less elasric like nylon ratchet tie straps, ideally the anchor points on the frame are higher then the top of the stakes thereby pulling the frame and engine/pump down to the ground. We used chains and 4 inch pipe for the donkey but the principle is the same, just scale hardware to suit your needs
If you get the pad right, there isn't much average lateral force involved, so springy anchoring is better - the unit has flexible hose connections, and the battery sits separately with only the cables linking it. (The unit came with a battery mount, but putting a battery on board would just shake the lead oxide off the plates.)
On 12/01/2013 7:00 PM, Allan Duncan wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
Why not use four largish tent pegs. Two on each side if the skids are appropriate? Cheers, Mike
Hi, Is the engine mounted to the frame via heavy-duty springs? Can you modify the frame, or build a new bottom-frame to support the original frame, and mount the latter onto the former via springs? Also... A "stake" the size of a phone pole is more than adequate for tethering a Chihuahua. :-) Depending on the size of the pump engine, the size of the stakes (at least 2), soil properties, and any slopes present... there will be a stake size that proves adequate. Bungees may not be adequate to tether to such stakes. Springs may be required. Alternately... Cut a rectangular "frame" large enough for the pump system, out of 4 pieces of 6x2's. Stake each of those 4 sides securely on top of solid level ground. Cut a piece of plywood that neatly fits into the wooden frame. Place the pump system on top of the plywood inside of the new wood frame. You can even mound loose dirt on the outside of those 4 frame pieces, for extra migration-prevention. Cheers, Carl On 12/01/13 19:00, Allan Duncan wrote:
An engineering problem to exercise the intellect:
I have a water pump powered by an air cooled diesel, all mounted in a frame which in turn sits on two skids parallel to the crankshaft. Air cooled diesels are noisy and leap up and down, a lot, and the pump likes to wander around.
I wish to make an earthen pad to sit this on, but I would prefer not to tether it to stakes with bungee cords, as keeping a stake in the ground without the use of a concrete pad is iffy. So, what profile should this pad have, bath tub or mound?
I think mound is the likely answer, but before I move the dirt I thought I'd throw it open for debate whilst I try searching on line for it. _______________________________________________ luv-talk mailing list luv-talk@lists.luv.asn.au http://lists.luv.asn.au/listinfo/luv-talk
participants (7)
-
Allan Duncan -
Carl Turney -
Hiddensoul (Mark Clohesy) -
Mike Mitchell -
Rohan McLeod -
Rohan McLeod -
Trent W. Buck