Steel Trailer Drawing

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Neo
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Steel Trailer Drawing

Post by Neo » Thu Jun 02, 2016 4:29 am

Hi All,

Does anyone have any drawing of the original Steel Frame 26M Mac Trailer they could share with me?

Many thanks for your help.
Neo

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Sun Jun 12, 2016 7:44 pm

I ended up doing this myself.... This is for my own 2005 Trailer
I measured the trailer and drew this on PowerPoint (took a LONG time!!). It's not brilliant but hopefully understandable?... It's not drawn to scale and it's not 100% accurate, but pretty close....Measurements are in millimeters.

I used the rubber V-Block as a main reference point. There are 5 measurements marked in Red. IMO these are critical points.

I may update this if I discover any errors ... Let me know what you think?

All the best.
Neo


Image

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Tomfoolery
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Re: Steel Trailer Drawing

Post by Tomfoolery » Mon Jun 13, 2016 9:52 am

I don't see any elevations for the bunks. When I sketched the bunk arrangement for my OEM :macx: trailer (for future reference), the two large bunks were at the same elevation at the apex, but the little one up front was higher. That's important, as the boat sits on all three bunks at once.

Also, is that the OEM aluminium :macm: trailer? I thought one of the big bunks was actually on the axle.

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Mon Jun 13, 2016 4:42 pm

Hi Tom,

Yes it's a 2D view at the moment. But I'll try and measure up the 3rd dimension this week.

It's a steel trailer with just one small bow bunk, one big middle bunk and two bunk pads (port and starboard) at the back.
The lack of support often worries me, but it has the 2005 Mac compliance plate, so unless that's counterfeit it's the original trailer. So it's done quite well over the years.

BTW, after doing a Mac Bump I often find the bow sitting 1 or 2 mm above the bow bunk and resting on the V-block instead.... So I'm wondering if I should be doing something like raising the bow bunk?

All the best.
Neo

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sailboatmike
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Re: Steel Trailer Drawing

Post by sailboatmike » Mon Jun 13, 2016 4:50 pm

Thanks for taking the time to do that Neo, a great resource for the forum for future reference

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Mon Jun 13, 2016 5:35 pm

Thanks Mike,

I believe we need to support each other if we want to sail together :) ... And I wouldn't wish an 11 or 12 thousand dollar bill on any Macgregor owner.... I still need to crack that problem .... but I'm working on it :D

All the best.
Neo

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sailboatmike
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Re: Steel Trailer Drawing

Post by sailboatmike » Tue Jun 14, 2016 2:26 am

I see the problem being once you go over 2000Kg GMV, the price just goes silly after that.

Torque axle suspension may be the way to go, less weight because there are no springs, hangers etc so more load available for the boat even a tandem.


I will have to bite the bullet and give some of the Australian suppliers a call in regard to pricing, but I fear that the price will be nasty

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Tue Jun 14, 2016 6:25 am

Good luck with that Mike. :)

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sailboatmike
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Re: Steel Trailer Drawing

Post by sailboatmike » Tue Jun 14, 2016 9:56 pm

I have chased some prices down for torsion suspension

I can see why our friends in the USA just bang on an extra axle, its only a few hundred dollars, here in Australia its thousands

Single axle 2000Kg assembled with 6 stud hubs and hydraulic disks is $1430 you just have to pull off what you have and bolt the new one on - BUT its only available in Landcrusier 6 stud hubs

Tandem axle (1250Kg ea) are $1320ea so $2600 for the pair and are available in ford or holden stud pattern - tandem axles have to be rated an extra 25% so the 2500Kg will give you 2000Kg rating

Thats from Transtyle in Melbourne - 03 9775 1762

Huntsman dont do Torsion suspension

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Wed Jun 15, 2016 5:32 am

Hey Mike, did you check out these guys?
http://www.factorydirecttrailers.com.au ... -trailers/

They have a listing on GumTree
http://www.gumtree.com.au/s-ad/bairnsda ... 1058788656

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Thu Jun 16, 2016 11:01 pm

Neo wrote:with just one small bow bunk, one big middle bunk and two bunk pads (port and starboard) at the back.
Hi Tom, Sorry to mislead you ... there is a third bunk at the back too :)

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sailboatmike
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Re: Steel Trailer Drawing

Post by sailboatmike » Fri Jun 17, 2016 12:31 am

Have you seen this one Neo, 2800Kg Tandem kit

http://www.ebay.com.au/itm/DIY-trailer- ... 2119657428

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Fri Jun 17, 2016 2:34 am

Nice find but I'm not so keen because...
I'd like Disc brakes ... Can't bear the idea of those drums in the salt water .... Consequently I can't have electric brakes :( ... Does anyone do an electric solenoid that pulls the handbrake lever? ... Or is that too simple!! :?
In my case it's cheap to buy the metal axles from a metal suppliers and have drop axle stubs welded on.... Can wrap that up for $110 an axle.

I'm thinking that the only affordable way to do this is to put together all the parts and metals and make a 2600 GVM trailer myself but the breakaway brakes are the show stoppers.

All the best.
Neo

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Sat Jun 18, 2016 2:27 am

Ok here's the updated drawings

Image Image

Download the pdf here ... https://goo.gl/1f9gcZz

All the best.
Neo
Last edited by Neo on Thu Jul 14, 2016 6:49 am, edited 2 times in total.

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Neo
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Re: Steel Trailer Drawing

Post by Neo » Sat Jun 18, 2016 5:44 pm

My Bunks are made of what looks like constructional pine covered with a blue nylon strip. Surprisingly the wood doesn't appear to be rotting away but I would like to change to another material if I can.... Something more flexible, so under the weight of the Mac it flexes to the curvature of the hull.

Any suggestions on what I could use?

All the best
Neo

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