venture 25 jib track placement or block location?

[Venture25_79]

Hi everyone,

I'm looking for advice for jib block placement for a bwyachts 100% jib on a venture 25.

The previous owner seemed to have installed tracks for a storm jib and Genoa and it seems none of them are quite right for the 100% jib. I'm currently using the storm jib tracks with the cars all the way aft. (The storm jib guess is speculation but these inner tracks seem way too far forward for a normal job)

I'm looking for advice about a starting point for jib block placement - how far aft and how far from centerline is reasonable for a 100%?

Here are some pictures. I'll be removing or rebedding all these tracks this year because the PO used galvanized bolts that have since rusted. So it's a good opportunity for me to get it "right".

I have searched all over for deck pictures for car placement for a 100% job but haven't found much out there.

Thanks!

[Highlander]

I,m sure the mac25 only had a bullseye on both side for to run the jib sheets thru as seen in this pic



here,s another pic just aft of the shrouds



I guess u could put a block there in that location also but I,d move it as close inboard as poss. for better pointing

if u r going with jib track then I,d say the best place would b the front of the track to start centerline on each side of the mast as close to inboard as u can just like my 26M



J

[Highlander]

[Highlander]

Genny track location




hope this helps u out
Notice that in that last pic the guy has jib & genny winches installed
J

[Venture25_79]

Thanks everyone!

What I have found is the older Ventures have totally different deck layouts from any photos I've seen. I did more investigating today as the wind direction was favourable for hoisting at the dock.

Photo 1 - Following the "draw a line from halfway up the luff through the clew" method, it looks like a reasonable placement would be 1/3 back along the handrail. The orange line is the existing track:


Photo 2 - Deck view. Orange line is the current track. I am considering moving this track to either the green location or the blue one. Blue has the advantage of being closer to centerline, but Green has three nice advantages too:
1. No interference with the deck organizer I would like to install soon (I want to have halyard/vang/outhaul on the starboard side and reefing on the port and there isn't much flat surface to work with)
2. No interference with the rail on the way to the winch
3. Direct line to the winch which is on the deck halfway back along the cockpit seats
It's hard to tell from the photo but the green area is on a curve.

The red circle is a filled hole - I thought that it could have been the original fairlead location but it's just one bolt hole. But there's a matching one on both sides so it's possible that's what it was for originally? The green circle is where the arrow in photo one points as a rough estimation of a "starting point" for car placement

Any thoughts on my green location before I drill are much appreciated. I think this weekend I will tie a block to the handrail to get a feel for the possible outcome.

[Venture25_79]

So I did some more tinkering. Seems there are two options that will work with my deck organizer plan:

1. Outside and forward. This has the advantage of allowing more forward car placement in case I have the jib partially furled. (Green)

2. Inside and aft. This has the advantage of being closer to centerline, however I suspect with 100% jib I will almost never use the aft half of the track. (Blue) - I can't place this any more forward without the halyards interfering with the track.

Maybe I am overthinking this! But after filling a dozen holes from pervious owners I'd like to get this right before drilling!

Has anyone fiddled with these general locations before?

[Venture25_79]

For those following along at home, I think I'm settling in on this layout - by letting go of the idea that the lines from the mast should be 90 degrees abeam, I could have the inboard track and the organizer.

One thing I have been searching for and can't find examples of is the idea of the track being mounted on spacers that raise it above the deck 3/4 inch so the mast lines could go under the track. Is this a thing that anyone actually does? or is it a bad idea for some reason?

[Stickinthemud57]

It looks like you are giving this a lot of careful consideration and that you don't appear to be proposing anything outlandish.

Your suggestion about putting the track on offsets worries me a bit, as it is something I have not seen done, thus am leery of. Even though the vectors are mostly aligned with the rail, the lever action created could be problematic, even at low levels. Keep in mind that friction at the point of contact with the deck (enhanced by bedding material) and better shear strength for bolts when the track is in direct contact with the deck will make for a significantly more secure mount than an offset mount, even slight.

Not that I have seen you suggest otherwise, but whatever you do, don't depend on screws. Bolts must pass through the deck and be backed up by washers or plates.

Consider also the possibility that there is possibly such a thing as too close to the centerline when it comes to mounting sheet pulleys. I tend to defer to the designer of the boat when it comes to this. In a conversation with Todd M. of BWY, he actually advised against trying to set the rails any further inboard than the liner recesses (portions of saloon roof liner in my 26S which drop to accommodate the rail bolts). He said he worked very hard to do this, and that it was not worth the effort.

One approach might be to set a rail just above the windows and see how that serves you. You might then experiment with some kind of temporary pulley attachment more inboard to see if you think it really helps.

Keep in mind that you will also need to trim for beam reaches, and setting the pulleys too far inboard may not work too well for this.

[Highlander]

Here u go I installed 7ft genny track on the cabin roof of my about 4" off the deck I fabricated 4 mounting two piece high grade alum brkt,s 1/4 & 3/4 way & attached the ends to the stanchions


if u zoom in u can see the port side one mounted between the stanchions & two mounting brk,s
if u need more detail here u go its a lotta work let me know if u want the inside mounting details with backing plates





















hope this helps u out

J

[Venture25_79]

This is all helpful! Thanks. I'll post pictures when I'm done