Is that the stretch between the rail bridge & the "M9" weir, Bridge of Allan in the Background, or is it first corner downriver of the rowing club? If the latter what time on which day did you take it?
Originally Posted by 9D280
I'll post back once I have figured it all out
Well, this may need further investigatiion.
10 will be plenty for a departure tirme. We could leave at half ten & still get to Kinkardine in time to meet the Canal posse.
This is where it all gets complicated. The notes I got related to departing from Stirling on a rising tide with a 4' draft boat. The main issue being the "rapids" that form at low tide on the corner round from the rowing club. If my calcs are right, it should have at least 5' of water approx 25 mins either side of high tide. (based on what the "Maryhill" needs for safe navigation)
Now, the times etc I used were based on a 5MPH (not knot) speed but it would appear that if we continue upriver at a higher speed, then we could potentially arrive on the up side of high tide, get a half decent stay, and return (and this is where I am guessing a LOT) potentially 1 hr after high, and still be able to get downriver.
As the tide his high, there should be sufficient draft to make 10 or so Knots safely over the ground, as there are strong outgoing currents, and at high tide plenty of depth (for a rib!) The marks on the briidge piers in Kev's photos show the kind of HW depth available - similar amounts of mud can be seen around the a91 bridge at low tide.
The ford at Cambus will likely be the "party point" where we need to break out the disposable BBQs on the mudbank!
I am not going to post thoughts on timing over it just yet, as I worked that lot out in a sunny beer garden attatched to a pub with a pleasant selection of real ales.
Suffice to say I want to recheck my figures in the cold light of day....