Chipper 18HP DR Chipper

   / 18HP DR Chipper #11  
I just used my new 18 hp DR chipper for the first time too. It did a nice job on two piles of limbs trimed from oak trees. A three inch branch eight foot long would run through well but the motor would labor. Any larger diameter and the length had to be reduced or the motor would almost die out. This is hard stuff and the chipper did the job. Right now I am happy with it but I have only spent an hour run time. Did spend fifteen minutes claering the output chute. I was having too much fun feeding it and did not keep the chips cleared away.

I did get my chain saw helmet with the mask on after I had one of those end pieces hit me in the chin. It was not hard but the ear protection is a good idea too.
 
   / 18HP DR Chipper
  • Thread Starter
#12  
Tim, Very close to my results. Funny you should mention the chain saw helmet. I went and got mine for the next session. Not hit yet and likely not to be hurt while wearing safety glasses but it seems prudent to use the safety equipment eyes and ears are hard to replace.

Ya gotta keep an eye on the output chute and give the pile a kick now and again (or move the chipper a bit.) A good reason to keep an eye on the output chute is that if you chip something and nothing comes out you are clogged. What happens next is smoke from the centrifugal clutch which if you mistake for spilled oil could get serious. It survived but made me feel dumb. Seems wet evergreen needles, not long like pine but JUNIPER, sticks inside the output chute even with the chute's output end is unobstructed. So stay alert to note that stuff in yields chips out with no apparent delay.

Pretty stiff trailer, huh? Bet it would go airborn and do barrel rolls with little provocation. May make that another project to widen the track width and add larger wheels and springs if I end up towing on the road much.

Patrick
 
   / 18HP DR Chipper #13  
I just rented a 6" capacity, hydraulic auto-feed unit last weekend for $100/4hrs on the meter. I had built-up multiple piles of large brances and small trees and did with very little trimming. This monster ate it all up in two hours and created one heck-of-a-pile of chips without any of the hassles reported here. I still had two hours of meter use left and no more wood. I too considered the DR but couldn't justify the expence when I could rent a chipper. My father want's to purchase a DR too as he will use it at a location where rental units are not availble. Do you also find rental to be unavailible?
 
   / 18HP DR Chipper
  • Thread Starter
#14  
mk62 Different strokes for different folks. For me, rental is a minimum 50 mile round trip subject to availability with constraints of having to plan ahead and out guess the weather (this is Oklahoma, even the best weather folks in the world located only 35-40 miles from me can't get the weather very good.) It isn't a religious thing with me, I do rent once in a while. Last time was last year, a large ride-on diesel ditch witch. I have 160 acres, not heavily wooded but with trees scattered all over in various densities. Left alone the oak and juniper (most locals erroneously call 'em cedar) will take over the pastures. At least every other year we get a limb breaking ice storm. AND this place had been let go pretty much for quite a while. I have a backlog that would have made rental of a large unit like you got a reasonable option but I still need something for the random time when I have a little spunk left, the fields are dry enough to drive on, I can con my wife into helping etc.

For example: We went out and worked with the chipper and chainsaw for an hour and a half after supper this evening under one pear tree that I had pruned pretty good last winter. Made two heaping FEL buckets (Hi cap 72 in) of chips that I dumped next to the dozen roses I planted for my mom. Would have finished sooner but half way through the job we discovered a nest with 4 eggs in the brush pile we were destroying. So we set the nest to the side while we worked, left some brush, and replaced the nest so hopefully the birds will accept the situation and continue sitting on the eggs.

Anyway the point is, for a large batch job, rental is reasonable. For the odd moment when the spirit moves you, weather is good, field conditions are good, etc. like after supper at 6:45 PM it is a bit late to think about rental from an outfit 25 miles away that closes at 5 or 5:30 PM. Still, I need everything the 18HP can give me part of the time and wish for more. As I have little interest in heating with wood (so far) I would rather chip the larger pieces but can't. This is a fairly small percent of my limbs. Once I get the big stuff cut off and disposed of that partially obscures the view of the 3 ponds visible from the house and some other "big stuff" , then for the most part I will be dealing only with stuff the 18 HP will handle well.

So you can see, for my situation, economics aside, owning is far more desireable and practical. If I were on a lot tighter budget then I would have to trade off convenience for cash. I spent the money but it buys me a lot of time and convenience. I had folks ask why I bought a tractor. Couldn't I just rent one cheaper? Even less practical that renting a chipper, I think.

I like to tinker. One of my tinker projects on hold for nearly 5 years, requires a chipper. I want to try to build or modify a thermostatically controlled auger (think pellet stove) to feed wood chips from a chipper. That would make wood heat thermostatically controlled with pilotless electric ignition and real practical as I would never run out of stuff to chip because I can plant a few acres of fast growing brush and harvest in rotation so I would have a perpetual supply. The house I will start later this year will have in-floor hydronic heat. That system doesn't care how you heat the water only that you do heat the water so I can have a conventional propane fired boiler but with a few valves can accept hot water from any prototype I may want to try. It would be possible to rent a chipper for that situation but I want to own the means of production.

Patrick
 
   / 18HP DR Chipper #15  
Patrick,

On the subject of rental vs purchase - you summed up my situation exactly. Planning for rentals is some combination of fortune telling, luck and work.

I find that periodic one hour sessions of moving dirt are very stress reducing. A half-hour session with the big chipper is unbelievably calming. Longer sessions start to seem like work./w3tcompact/icons/grin.gif
Heck, I bet I can justify the expense by savings on a therapist.../w3tcompact/icons/clever.gif

On the chipper feeding an auger fed boiler - my neighbor has a system similar to this, but he buys the chips in bulk - the ones he makes locally go for cross-country ski trails. He had enough trouble with the automatic feed that he installed a backup propane system. If you want more info, I can find out more.

-david
 
   / 18HP DR Chipper
  • Thread Starter
#16  
David, I like the therapy cost justification. Being near the top of the food chain, I don't feel I really have to justify my well thought out, rational, and reasonable decisions to anyone but chose to share my thoughts for the enlighten*(&* err ah I mean amusement of the masses. Translation: I can't plan ahead so rental isn't fun.

Now then about the chipper fed boiler. Gadzooks! I never had a clue that anyone had ever done that before. Seemed reasonable to me. Lets synchronize our positronic brains... does his auger feed chips or pellets? There are a lot of pellet stoves on the market some with automatic ignition, thermostatic control, variable BTU output, and so forth that are fired by pressed wood pellets (look like rabbit stuff, input not output, food). If it is a chip feeding auger system rather than a pellet stove then I am seriously interested and would be grateful for any information that you are willing to provide... pictures of mechanism, scans of manuals and documentation, maker's contact information, or whatever is available. I thought I was going to have to do a lot of developmental work. If this pans out maybe I coulld buy some auger parts or...

I gotta go etch the inside of my dune buggy gas tank that did not explode when I patched it with my wire feed gun using "innershield" flux cored wire and then brazed the welds to reduce porosity.

Patrick
 
   / 18HP DR Chipper #17  
I'm almost positive it is a chip feed system. He gets chips by the semi-truck load. It heats a 12,000 sq.ft. house. Castle actually - yep with battlements, secret passages and all... I'll see what I can find out about the system.

-david
 
   / 18HP DR Chipper #18  
Burning your chips is an interesting idea. A pellet stove owning friend once told me his only problem with the stove was it's sensitivity to moisture in the pellets. I find my pile of wood chips doesn't dry well, especially if green wood is fed through the chipper. Do you anticipate a problem in this regard?
 
   / 18HP DR Chipper
  • Thread Starter
#19  
MK62, I once redesigned the lighting for a MK48 rework facility, any relation?

Now then MK, regarding anticipating troubles. Yeah, lots of them, I just don't know what they all are yet. I have done conlsulting and prototype development and from that experience the only thing I know for sure is that you never really know for sure. I was thinking about drying racks for chips that could be covered with tarps overnight (dew) and in inclement weather(open to air on bottom, made of perf metal or expanded or...). Jury out on that. Thought about a preheat situation where the storage hopper would be warmed by waste heat, by either stack gasses, or from the burner itself, or both. Lots of ways to do it. Just consider the fastest consumption rate and worst case moisture content (includes consideration for variability due to wood type etc.) and how long it would take to sufficiently dry the chips prior to entry into the fire box.

I even thought it possible that, like with diesel fuel, you might need a seasonal blend, like adding some, dare I say it-perish the thought, store bought wood pellets. Wood pellets ignite reliably and for me chips are untested as regards automatic ignition. So I might have a pellet requirement for ignition. I'm not a fanatical purist and the thought of adding propane for reliable ignition/ease of automatic ignition doesn't bother me, they just aren't my first choice.

Patrick
 
   / 18HP DR Chipper #20  
Variable moisture content causes his auger to jam up, making unattended operation problematic. He solved this by installing a propane backup system.

-david
 
 

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