uniforest or tujfun

[cooks]

i guess thats my answer then thanks for your help Chris and Brushcutter.

[mendiplogs]

HI chris yes we run a ingland winch 5.5ton on 105hp tractor it a good job mate thanks jon

[Brushcutter]

A 100hp isn't a lot of hp but it should be fine to run a 8tonne winch. It will be at the top end of what you can run power wise. It will be sub 1tonne on the linkage i would have thought so balacne won't be too much of an issue.

 

Just as a point of reference i got a quote for a 9tonne Igland double drum. They're a jaw dropping 13k+vat. Although when you think thats only about 6.5k a drum. So you can see what value the uniforest offer. Iglands are ace though.

[mendiplogs]

HI brushcutter i run a 5.5 ton igland its a good winch on my mf 399 thanks jon

[cooks]

Brushcutter what does your valtra come in at HP wise & does the 6.5 fransguard make the tractor stutter?

 

The uniorest does seem really good value just easier to spend less on the 8 ton mechanical version at the moment but thinking i will end up regretting not getting the EH model in long run.

 

How good was the deal they offered you?

[Brushcutter]

Its an A92 so its around about 90hp. The tractor has never stuffered with 6.5 tonne on it. I've pulled the tractor back digging in about 18" an it didn't stall. Snapped a full steel winch cable and it didn't stall. pulled things so heavy that the winch refused to move it and the tractor didn't even sound worried.

 

I think it was £5500+vat for the EHpro and the remote and delivery.

[difflock]

I must say that I wanted an electro hydraulic, but reckoned that with my casual almost hobby usage I could not justify one, so opted for the rope operated version.

Once I saw it on the back of the tractor and how the mechanism stuck out the side etc etc, I swopped it for an Electro hydraulic version.(& Thank you Jeffery)

I was well pleased with my decision as when I am "sliping" a buch of logs down the Rodding I can slack the winch before the softer bits and winch them in again, more straightfordwardly than with a rope operated winch?

I run a 5 tonne Kerpan on a nominal 85 HP DB 1490, which is about all the old girl is fit for, and is as big as I need. I Only got manky conifers:thumbdown:

One point perhaps is that the Electro hydraulic comes standard with the lower line speed, in the rope operated one can choose either or (0.60m/s or 0.90m/s?)

I really swithered between the Uniforest & the Kerpan, with virtually no difference in the price.

Cheers

M

[cooks]

Difflock that's a good shout about line speed on the EH models ihad not noticed that.

 

Have you got the radio control unit ?

 

Brushcutter why would you choose the extra wide butt plate out of intrest?

 

Cheers Lads

[difflock]

Not yet, for me it would be a luxury, I might buy a "buckshee" one offen e-bay or wherever mind, for when I wish to single handedly fell a tree against its natural inclination:blushing:

[b101uk]

Mm, I would question the wisdom of putting an 8 to 9 tonne skidding winch on the back of your average 100hp tractor then putting it atop a “steep bank” and winching wile on your own with a remote control.

 

Your average 100HP tractor will only be 4 to 4.6 tonnes.

The top pulley of a 9t winch will be ~5ft above the edge of the buttplate.

The tractive force will be <9t with most of the rope paid-out.

 

9t @ ~5ft leverage height is equivalent to 4.5t lifting force ~10ft forward of the buttplate which is well ahead of the tractors rear wheels and not that far behind the front wheels given most tractors have at lest >65% of there weight centred on there rear wheels you have a realistic chance of tipping the tractor over even if its square on to the pull direction, if its not square on to the pull the chance of it going over more than doubles for each 10deg out of square from the direction of pull.

 

Also most 8 to 9 tonne winch need 50kw to 55kw of power at the PTO stub available at engine tickover RPM, it is unlikely that a 100HP (~74kw) tractor will have 50kw of power available at tickover at the PTO stub, given engines in tractors have about half there peak power/torque available beneath 1000rpm (engine) and that is also beneath there peak torque RPM.

 

If your tractor is not up to the winch you are using then you don’t have the capability to do maximum load pulls at minimum line speed especially with electro hydraulic systems given there on or off nature, so all you can then do is rev the tractor to peak torque rpm just so you get the maximum line pull but you then have all that extra line speed and electro hydraulic clutch slip each time you engage drive which all conspire to make fine control difficult and increases the speed that things can go wrong.

 

Given you say you want to pull up to ~90ft3 (~2.5m3) at a time which for the sake of argument I will assume to be green oak at ~1t/1m3 then a 6t winch will have ~3t of minimum pull with almost all the winch rope in yet alone paid-out and ~2.5t of timber on the forest floor doesn’t take 2.5t of line pull to move it, it only takes 2.5t of pull if you lift it vertically!