Rollercoaster1 Bracket Dimension?

[Daibheid]

I want to raise the rear swinging roller set on my Rollercoaster 1 trailer to get the keel well clear of the swinging beam as the boat comes on to the trailer. I photographed the extra high support brackets on a Rollercoaster 5 thinking I'd just stroll into Indespension's agents and pick up two pairs.

Not so simple but they are willing to make them up for me although they don't have dimesnioned drawings. So I put together a dimensioned sketch but found I never measured the pitch of the 8 mm bolts on my RC 1 that support and secure the two 60x40 sections. (These sit lengthways on the swinging beam and carry a pair of rollers at each end) Can anyone provide the pitch of the two holes highlighted in yellow? It'd save me a drive to measure 'em and I can't find anything anywhere on the web so if someone has an RC1 sitting nearby and wouldn't mind running a tape over it.....? Even better if someone has a dimensioned drawing for these extra high brackets!

Thanks!

[Downhilldai]

64mm

[Daibheid]

Originally Posted by Downhilldai

64mm

Thanks Downhilldai for the superfast answer but I scaled the photo and came up with a range of 50- 60mm. Is that a centre to centre dimension and is it defo an RC1.

sorry to be cagey but this is going to be 8 holes in 4 brackets!

I know I know, I'm an ungrateful wretch!

[David G]

Originally Posted by Daibheid

I want to raise the rear swinging roller set on my Rollercoaster 1 trailer to get the keel well clear of the swinging beam as the boat comes on to the trailer.
Thanks!

Can't you just move the two roller sets closer together?

Won't this lift the hull higher and away from the swing beam?

Cheers,

Orve.

[Downhilldai]

It's a Roller Coaster 1, circa 1994, braked version. Dimension is 64mm at hole centres.

Orville has a point - are the rollers that far apart that the keel fouls the beam? A bit of adjustment may solve your problem. The downside of raising the boat is that it's less likely to float off the trailer and will take a lot more wnching back on.

[bedajim]

Originally Posted by Daibheid

Thanks Downhilldai for the superfast answer but I scaled the photo and came up with a range of 50- 60mm. Is that a centre to centre dimension and is it defo an RC1.

sorry to be cagey but this is going to be 8 holes in 4 brackets!

I know I know, I'm an ungrateful wretch!

If they are making them up get one of the holes sloted

[Daibheid]

Originally Posted by bedajim

If they are making them up get one of the holes sloted

I like that idea - thanks- must check see if they planned on drilling the holes or have a punch press or nibbler which'd make it easy to slot.

To Orville and Downhildai, fair point on the roller adjustment. I did bring them as close together as I could but the flat planing step, some deep chines and lateral stability limit this. The V in the bow is quite pronounced and is the risk area so I've no option but to raise the rollers. I have the bruised knuckles from the impact driver freeing up the U-bolts and the rusty socket set from the session at the slip the following day trying to optimise that adjustment option!

The points about having to sink the trailer deeper and winch more are spot-on too but raising the rear rollers is the best compromise to protect the keel during recovery.

Great feedback guys - it's great to have a a second opinion to help cover all options/implications.