new toy help for math gurus

[raptorheli2]

finally bought a new boat and need some help from the math geeks!

details are thus-

Avon 580 adventure RIB
Mariner 100hp 4 stroke
Indespension trailer
AUW is 1000kg.

i need to find out how much force it will take to pull it up a driveway with a 25 degree incline so i can arrange an anchor point and suitable winch for doing this.....only prob is i have NO idea how to work this out.

anyone?

cheers

[wibplus]

Hi, not much idea how to work it out either but I have a winch which clips on to a floor mounted plate to pull a caravan up my drive. That is quite a steep slope.
I only used it once but then we decided to sell the caravan so the winch is sat in my shed. I can have a look at the destructions and see if that can explain how to work it out.
I will get back to you if I find out anything useful.
Bill.

[gorber]

It is 423Kg if there were no friction etc, but there is friction, so it will be a bit more than that (I think 500Kg of pull would be enough).

Andrew

[raptorheli2]

thanks for this guys, appreciate it. surprised it is so little going up a gradient....good stuff. i'll be massively over speccing the winch anyway with a 1500-2000kg unit.

it's more so i can make an anchor point on the drive.

bill-is this an electric system you have/would you sell it and what is the plate exactly? pics would be awesome if you have any for ideas on my app.

edit-25 degree incline was a guess till i get home and put my iphone on the hill so i'll update accordingly later folks if massively different.

cheers

[gorber]

About 360N (Guess as I don't know coefficient of friction of the trailer) 500kg will easy do it. Also from this I can tell you that if the cable snaps it will accelerate at 2.13m/s/s so don't stand behind it.

I'm not sure how you get 360N from that.

It should be Sin(25deg) X 1000kg = appx 423kg excluding friction

In terms of Newtons it would be about 4150, but not many people think of those units in the real world.

[unwind-protect]

423kg is just the holding force, of course. Overcoming friction to actually pull it up the slope probably requires quite a bit more.

[Mart61]

Here's all ya need:

[raptorheli2]

lol......

i'll be getting 1500kg plus winch anyway so just how to mount it to the floor now is my issue.

cheers

[crofty]

new toy help for math gurus

Post the question on an off road land rover forum they will have the answer

[Kozmyk]

Anchor ideas -

Winch on trailer.
Anchor plate bolted/set into concrete OR anchor pole (removeable)

Winch in garage offset to wall, run cable through pulley anchored to centre line of drive.

[ddracer]

I'm not sure how you get 360N from that.

It should be Sin(25deg) X 1000kg = appx 423kg excluding friction

In terms of Newtons it would be about 4150, but not many people think of those units in the real world.

No i relised my math was wrong after i rechecked it so i deleted the post to save confusion as you had already answered it.

[raptorheli2]

little update folks, my driveway is exactly 13 degrees on the old idog, how much diff that will make i dunno. the good news is if anything it's less stress i guess

some pics of the rig if it helps out.

sorry i don't know how to find out about the trailer friction??

cheers

[inferno]

That won't need much!!! Could you not reverse it up the driveway? Then use wheel chocks/chain and post to hold it?
How about a pulpy system and good old fashion tug o war style effort?! I once used an old block n tackle to do similar With!

[raptorheli2]

the top of my driveway where it will stay is flat so no issues there. it's more the road i live in i don't have a lot of room to get it in while on the car.

also i have NO intention of putting my car down a slip so want electric winch for that purpose aswell.

cheers

[electricsceadu]

all you need is this