Using spinnaker halyard for Solent stay?

[Poey50]

It's not the greatest photo but I'm wondering if I can get away without a dedicated halyard for rigging a sail on a Solent stay (to be used occasionally for No. 3 jib and storm sail) and use the spinnaker halyard instead. That is the one emerging from the mast then round the large block and dropping parallel to the mast. A red dot is close to the Selden inner forestay attachment point (about 12 inches down from the top of the mast). As the spinnaker halyard is off to the side it doesn't look like it would rub - it's the angle that I'm not sure about, starting above rather than below the intended stay.

 

[Roberto]

I have mine exactly like that, I covered a couple of metres of the two spinnaker halyards with additional dyneema covers to suit the solent and storm jib luff lengths, material basically indestructible. Not the very best solution, but saves an additional hole and work on the mast top.
In case you plan to sail on the same tack, just choose the leeward one.

 

[dom]

Should be fine if the spi gear is rated appropriately. What will you ramp up the forestay tension with, a 4-8 cascade?

Also, how is the forestay attached to your deck, though guessing fine if inner stay already specced?

 

[Poey50]

Should be fine if the spi gear is rated appropriately. What will you ramp up the forestay tension with, a 4-8 cascade?

Also, how is the forestay attached to your deck, though guessing fine if inner stay already specced?

I'm planning a dyneema cascade - already sorted for a strong point on deck.

 

[dom]

I'm planning a dyneema cascade - already sorted for a strong point on deck.

Then no prob if everything is suitably specced, and assuming spi halyard is also dyneema.

 

[Poey50]

Or ... a high load block or even a high load low friction ring spliced onto the Selden O fitting (pictured) and hanging just below it to give a good angle. Together with a dyneema halyard running outside of the mast. Has anyone done that?

 

[BabaYaga]

I would imagine a loose hanging block or ring could rattle horribly, especially in situations where hoisting a storm jib was called for.
You don't have a spare sheave in the mast top? Could perhaps be used in combination with one of these further down?
https://jimmygreen.com/running-rigging-accessories/47651-selden-halyard-lead

 

[dunedin]

A storm job on the inner stay won’t come up beyond 60% or so of the mast height, and with the forces the stay will pull off to leeward.
I think you will find on one tack the spinnaker halyard will be pushed against the main forestry and will chafe badly.
Seems like a bodge?

Some boats have the spinnaker pole uphaul high up the mast, and with suitable spec this can double as a storm jib halyard

 

[Poey50]

BabaYaga and dunedin - both good comments. Back to the drawing board - not really something to wing.