Skyline load capacities

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KiwiBro

KiwiBro

Mill 'em, nails be damned.
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Hi fellas,

Was looking at the Tajfun mobile skyline specs and it lists a load capacity of just over 6000Lbs. But I am not sure I understand that. Does this mean that's the most the skyline would be happy about carrying completely airborne and if it were dragging a log rather than a full lift, it could handle much more?

Is that how it's normally accepted?

In the scenario of having to span a sensitive gulley or the like and clear the ground, is it safe to assume the skyline in question could only handle an approx 3t log? If so, that's pretty lousy when harvesting dense/wet logs.

Here's the moz 300 skyline:
Resize

Specs are here:
http://www.tajfun.com/docs/downloads/en/moz300_en_imperial.pdf
 
Don't forget to add the weight of the carriage, too. I wonder if they are including it? Generally we speak in terms of payload and it does sound like it might be 3 tons maybe less. I'd be asking these questions from the manufacturer. It looks like a Koller type. Maybe go to their website and compare?

We talk in terms of payload. That would be the weight of the logs. But you do have to figure in the carriage weight and that takes a lot of payload away from the smaller yarders. And yes, full suspension would be possible at that weight, but then you have to figure in the strength of the tail hold, and deflection, and all the variables.
 
That's a cute little yarder but I wonder about those tires. Are there outriggers to keep it from jumping up and down?

6000 lbs dead weight isn't a lot but it could still put a strain on things. There's always the temptation to pull a little more and a little more and a little more after that because nothing broke so far. I think I'd want to talk to guys who have actually used one and used it for some length of time before I cut loose with any money.

Manufacturer's specs are a good guideline but I'd rather see it work.
 
Gologit said:
I didn't read the fine print in the brochure so I missed that. I'd still like to see it pull. I'll get out of here now and leave you yarder experts to your toys.
Click to expand...

I'll get an early start on my next year's Christmas list. I know nothing about yarders, but I want this one. And the tractor. And a crew of six 25 year olds, each with 40 years of yarding experience. And some just the right size timber. And some beautiful mountain land. And ... . Nothing like cool machinery to get me cranking.

Seriously, always good advice to check with those who have extensively used the product. I am personally curious as whether the hydraulics of the trolley/carriage winch is battery powered or powered by an engine. Every battery powered device I have ever operated seems to die at the most inconvenient time and when you don't really have time to wait for a recharge.

I've got to get back to my list now. Remind me how do you spell the name of that thing again?

Ron
 
slowp said:
Don't forget to add the weight of the carriage, too. I wonder if they are including it? Generally we speak in terms of payload and it does sound like it might be 3 tons maybe less. I'd be asking these questions from the manufacturer. It looks like a Koller type. Maybe go to their website and compare?

We talk in terms of payload. That would be the weight of the logs. But you do have to figure in the carriage weight and that takes a lot of payload away from the smaller yarders. And yes, full suspension would be possible at that weight, but then you have to figure in the strength of the tail hold, and deflection, and all the variables.
Click to expand...
Thank you. If the payload is 3t, that's putting a pretty large hurdle in the way of paying something like this off, even though I don't know what it would cost. I wonder what the pulling force of the skidding cable is.
 
I would love to have one here, but my property lacks good tailholds so I'd have to get another piece of heavy equipment to tie it to. The neighbors wouldn't like having that in their road and the talkie tooter might get complaints, although they've had geese, peacocks and roosters.

Guyline stumps might also be problematic--I'd have to try to make twisters and would probably manage to get hurt. I'll just let the steep ground be. The trees provide a bit of privacy and slope stability, I hope.

The big yarders had feet that were hydraulic. They'd telescope down and provide a bit of stability. Think of it as yet another hydraulic part to break down.
 
Found a price, albeit an old one, of Euro 48,000 (excl. VAT). So I guess that's not much change from USD 60k.
 
that's pretty vague info, the capacity number. your % deflection will change that number quite a bit, the more deflection the bigger the payload. That yarder looks like its for thinning small wood, period. Also, yes, big difference between partial and full suspension. I'll bet 6,000 is an optimal level that your on the ground rigging will rarely allow for. like a koller 300. Humptulips is the one who knows it all, see if he sees this.
Interesting about raising the tires, gologit is right, machines can't sit on rubber, the downward pressure would blow out the tires if nothing else.
 
Yup, I think all the tire mounted yarders have the feet on them. There was a really cute little Thunderbird yarder here a few years ago. It was about that size, but with a cab. It was made for thinnings and it worked beautifully and I wish I had a picture of it. I think I only have parts of it in pictures and I'm thinking it was track mounted.

Here is a link to a link, that won't open for me. The download is free. Looks like they have a spreadsheet program to replace the old Loggerpc program. You went out to the field, ran a few profiles in the unit, plugged in slope and distances, chose a yarder configuration and the program would spit out payloads for each station and would identify the limiting spot--lowest payload station, on the profile.

http://www.fs.usda.gov/detail/r6/landmanagement/resourcemanagement/?cid=fsbdev2_027048
 
hammerlogging said:
that's pretty vague info, the capacity number. your % deflection will change that number quite a bit, the more deflection the bigger the payload. That yarder looks like its for thinning small wood, period. Also, yes, big difference between partial and full suspension. I'll bet 6,000 is an optimal level that your on the ground rigging will rarely allow for. like a koller 300. Humptulips is the one who knows it all, see if he sees this.
Interesting about raising the tires, gologit is right, machines can't sit on rubber, the downward pressure would blow out the tires if nothing else.
Click to expand...


Thank you for that vote of confidence but I think you are likely to be dissapointed.
I looked through the specs and to tell you the truth I don't have a clue about payload specs by weight. I could give you a guess if I could tell you what size lines it carries but those are listed in some foreign code? I will say for a small thinning rig 6000 pounds doesn't sound out of line if that is full suspension. As Patty says a lot of things that doesn't tell you.
Out on the riggin' we seldom know how much a turn weighed so I'm guessing but consider if maybe that carriage weighed a 1000 that leaves you 500o for a turn, you get 10 of those to the landing you've got yourself a load of logs. I doubt most thinning turns would go that much so anybodies guess but when I thinned we seldom suspended anything. I'm thinking it might be adeqate.
Be nice to know what size the lines are on it.
Sounds like it has hydraulic jacks and some kind of foot. Madills and Skookums were that way. 4 guylines, Kind of reminds me of Kohlers. From the description it sounds like the Skyline drum is operated seperatly from the skidding and haulback via a separte hydraulic motor. Be interesting to see what the brakes are on it or a dog like the Kohlers which I considered to be unsafe.
Carriage says electrohydraulic so I'm thinking a charger run off one of the pulleys on the carriage which could be OK. Kohler carriages charge the hydraulic system off a pulley on the carriage and that works.
It looks like the dropline is the end of your skidding line similar to an Eagle. It says it feeds it to you so maybe powered slack puller but hard to say from the literature.
Anybody notice that odd set up with the backline feeding through the carriage. That doesn't look good to me.
 

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