One insane englishman trying to rebuild the 1910 gaff cutter Tally Ho, in WA. (VIDEO)

[Peerie Maa]

No, my mistake ! It isn't fixed... I was just surprised it's 4 bladed.

Well, half right, 4 bladed.
Feathering, but can be fixed in some way.
There was a design with the blades free to rotate in the hub (Autoprop), and offset so that they adopted the optimum position to drive the boat.
I don't think that they would extract power from the water flow, though.
This is what the company's website says about pitch controls:

Independently adjustable external pitch control. Forward and reverse pitches can be changed in just seconds — even underwater.

Benefits: Custom fine tuning (in micrometer-small increments) of reverse thrust vs. prop-walk. (For most owners, eliminating prop walk is more important than maximizing reverse thrust.)

VARIPROP allows you to customize that balance for optimum control, maneuverability and safety. Independent fine tuning of forward thrust means that VARIPROP delivers the best possible performance (speed, thrust, fuel economy) in forward without compromising reverse performance – and vice versa

Looks as though you need a mask, snorkel and Allen key.

[Peat]

This is from the comments on the video ' Machining the Driveline & installing an unusual propeller'

"There are internal gears inside the hub that engage when the boat is put into forward or reverse, so depending on the direction of shaft torque, the blades rotate to a thrusting position. With the transmission in neutral and therefore no torque on the driveshaft, the water pressure on the blades pushes them into a neutral position." "It will only feather from forward thrust. If in reverse pitch the water pressure keeps it in reverse hence the ability to re-gen. It's simply a function of an offset hinge point."

[Peerie Maa]

This is from the comments on the video ' Machining the Driveline & installing an unusual propeller'

"There are internal gears inside the hub that engage when the boat is put into forward or reverse, so depending on the direction of shaft torque, the blades rotate to a thrusting position. With the transmission in neutral and therefore no torque on the driveshaft, the water pressure on the blades pushes them into a neutral position." "It will only feather from forward thrust. If in reverse pitch the water pressure keeps it in reverse hence the ability to re-gen. It's simply a function of an offset hinge point."

This made no sense,

It will only feather from forward thrust. If in reverse pitch the water pressure keeps it in reverse hence the ability to re-gen.

but from the operating manual

THE BEST WAY TO FEATHER THE PROPELLER IN THE SAIL POSITION IS:
VARIPROP sail position with mechanical gear-box:
+ Power at 3 to 4 knots in forward.
+Stop the engine and engage the transmission in reverse to stop the freewheeling of the shaft.
If the propeller is not feathered in the sail position the shaft will freewheel like with a fixed propeller.
In that case start the engine again and repeat the steps above.
Once the prop is feathered , it is better to shift the transmission to neutral.
DO NOT stop the engine while it turns in reverse. In this case the blades will stay in the reverse position and
will not feather. You can actually use this feature to drive a shaft generator.

I can't see it being water pressure from the boat's motion holding the blade in position, there must be a feature of the gearing in the hub. Maybe the assembly moves aft in the hub to engage some sort of brake or locking mechanism.

All in all, a clever piece of engineering.

[Powerwagon]

This made no sense,

but from the operating manual

I can't see it being water pressure from the boat's motion holding the blade in position, there must be a feature of the gearing in the hub. Maybe the assembly moves aft in the hub to engage some sort of brake or locking mechanism.

All in all, a clever piece of engineering.

My folks have one of these props on their motorsailer. It does exactly what you said, when you spin it in the forward direction the water pushes the blades (together on the gear) until they hit the stop (which you set). You have to be gentle going to reverse because the opposite rotation through the water makes them turn the other way and land on the reverse stops. If you roar and snort while maneuvering you can damage the internals.

[Woxbox]

Very early on he explains that the hybrid motor system is designed to charge the battery bank from the prop. No mention of what feed rate is expected. But that seems to be it -- no mention of a separate diesel genset, which many boats this size carry. I suppose if there's not enough wind to sail fast enough to spin the prop, they'll be firing up the engine for both propulsion and electric generation.

[Peerie Maa]

Very early on he explains that the hybrid motor system is designed to charge the battery bank from the prop. No mention of what feed rate is expected. But that seems to be it -- no mention of a separate diesel genset, which many boats this size carry. I suppose if there's not enough wind to sail fast enough to spin the prop, they'll be firing up the engine for both propulsion and electric generation.

Yes, Leo did also say that 15 minutes of engine time in harbor would recharge the batteries.

[Hwyl]

He also has the option of feathering the prop for least resistance. I'll bet that he uses that mode more than he expects.

[J.Madison]

Yes, Leo did also say that 15 minutes of engine time in harbor would recharge the batteries.

That doesn't pass the sniff test. Just ballpark figures, if the electric motor and battery bank are sized to propel the vessel for a significant amount of time, and the diesel is maybe twice as much power as needed to propel the vessel, then at best you get two minutes of electric run time for every minute of charge time. I bet in reality it is more like 1:1. So 15 minutes of charging will run the lights and systems but certainly wouldn't fill an empty battery bank.

1:1 is still really good compared to lead acid.

[Hwyl]

Jon, I took it as meaning: It would recharge the batteries with the electric motor out of the equation.

[Mark0]

Victron batteries are made from Winston LIFEPO4 cells - which specifies 0.5C charge rate allowed up to 3C (with temp control). I'm sure the system bank would be sized for the generating capacity and it seems silly to try to push more than 0.5C, it would be bad engineering to reduce that margin.

I'm setting up our boat with a prop shaft generator (It should produce similar power to the system on Talley Ho under sail). This is where the hybrid system will shine- I figure we will be able to generate 400W or so while under sail. This will keep the lights / fridge / chart plotter on easily. Much better on a traditional boat than a massive solar arch.

Cheers,
Mark

[Rumars]

He has a 40kWh battery bank, and a parallel diesel-electric propulsion, 85PS/20kW. In diesel generator mode (wich it can do with or without the prop turning) it has a capacity of 10kW. The hydrogenation production depends on how fast the prop turns at a given speed under load.

Theoretical electric range is 2h at full power, but it will probably be used mostly for maneuvers and quiet motorsailing assistance, so actual range will be several hours more.
Theoretical recharging time with the diesel is 4h, but that's only if the batteries are flat.

[Peerie Maa]

Just a little bit of Tally Ho
Tender to Tally Ho Episode #136

[ron ll]

That is a pretty sweet dinghy.

[Rich Jones]

I've nothing against ply/fiberglass boats (I've built five glued lap boats) but I just can't see this boat on Tally-Ho.
Everything on Tally-Ho is 100% traditional and for Leo to choose this dinghy seems a bit off. He explained why he doesn't want a traditional boat, but why not something that at least looks traditional?
Also, this tender seems a bit small for a boat the size of Tally-Ho. It's a three-person dinghy at best and a crew wanting to go ashore will be bigger than that.
Why not a 14-footer hanging on davits off the stern?
He did mention that this will be "one" of Tally-Ho's tenders, so time will tell.

[Peerie Maa]

I've nothing against ply/fiberglass boats (I've built five glued lap boats) but I just can't see this boat on Tally-Ho.
Everything on Tally-Ho is 100% traditional and for Leo to choose this dinghy seems a bit off. He explained why he doesn't want a traditional boat, but why not something that at least looks traditional?
Also, this tender seems a bit small for a boat the size of Tally-Ho. It's a three-person dinghy at best and a crew wanting to go ashore will be bigger than that.
Why not a 14-footer hanging on davits off the stern?
He did mention that this will be "one" of Tally-Ho's tenders, so time will tell.

Leo did say that the rubby dubby would be used for moving more crew or stores than that little folding punt.
If you want authenticity, the tender would not have been in davits on the stern, Tally Ho is not an oyster skipjack, it would have been in chocks somewhere on the deck. Which is exactly why Leo did not go down that route.

[Toxophilite]

I think he's going for a mixture of old and new throughout. Mostly traditional with modern touches throughout where advantageous. Like the hybrid engine/motor system. As far as dinghies it seems quite practical, It has performance qualities he enjoys and whilst it doesn't look uber salty , it's not a RIB of plastic dinghy

[Peerie Maa]

^ This.
That dinghy, lashed down between two deck houses, will be the only non trad part visible from outboard. With the possible exception of the anchor windlass.

[Mark0]

^ This.
That dinghy, lashed down between two deck houses, will be the only non trad part visible from outboard. With the possible exception of the anchor windlass.

I'm positive the windlass is going to suit the boat !

[Rich Jones]

^ This.
That dinghy, lashed down between two deck houses, will be the only non trad part visible from outboard. With the possible exception of the anchor windlass.

It's possible it won't be so visible after all. The high bulwarks will help to conceal it from a side view, and he might just have the thing tarped while not in use.

[wizbang 13]

it is almost impossible he will not have a 12' zode with a 15 yammie as well
ubiquitous

[Peerie Maa]

it is almost impossible he will not have a 12' zode with a 15 yammie as well
ubiquitous

Leo is going electric on the rubby dubby, discussed in the YouTube.

[Lemsteraak]

I'm really glad that Leo showcased Russell Brown and his dinghy design. It is quite an accomplishment and very refined. I was looking at the shaped foils and realized this is a planning hull like a Laser or a racing dinghy.

[gypsie]

I made my nutshell to be my tender.
In any chop it takes nice dings out of the hull. They kind of bash each other - no boat wins.

Rubber duckies are very gentle on wooden hulls.

[Rich Jones]

Watching the video again I realized that I had missed Leo's mention of a second tender being a rubber duckie with an electric outboard. I wonder if it will be a RIB or something that can be totally deflated and stored while offshore.
So, the split tender would be more of a recreational tender than work horse.

[emf]

In any chop it takes nice dings out of the hull. They kind of bash each other - no boat wins.

I had a Norse pram for a dinghy which worked great except for the bumping against the hull part. I think that may be the reason some dinghies have a thick rope around the gunwales. Those padded gunwale guards would work better, I just don't care for the looks.

[Slacko]

I put rope around the gunwales of my dinghy.
It mostly works, but they still manage to clash if not tied together appropriately.
That dinghy looks awesome, and rows great.

[Peerie Maa]

In any chop it takes nice dings out of the hull. They kind of bash each other - no boat wins.

The best way to deal with that on a boat of Tally Ho's size is to rig a fender board, a wood board with 4 fenders attached to one side, slung on a couple of lines so that the fenders are against Tally Ho's topsides and at the right height for the dink to berth against.
This is the new, simpler alternative.


https://www.walmart.com/ip/WOOWAVE-B...boat/503425627

[wizbang 13]

dat don't werk on an anchored bote ,
when everyone elce is terrorizing the place with THEIR 15 yammie,the big boat rolls one way, the skiff rolls the other way, and all those fenders /boards wind up INSIDE the skiff making it bang even harder
gotta trail em astern

[Hwyl]

Actually the best way, which is also period correct, is to use a dinghy mooring boom.

As to whether the dinghy is period correct, remember that Flo-mo was accused on this forum of using the lies of the PT 11, when in fact he was using the lines of Hereshoff's Biscayne 14.

[Peerie Maa]

dat don't werk on an anchored bote ,
when everyone elce is terrorizing the place with THEIR 15 yammie,the big boat rolls one way, the skiff rolls the other way, and all those fenders /boards wind up INSIDE the skiff making it bang even harder
gotta trail em astern

Actually the best way, which is also period correct, is to use a dinghy mooring boom.

This, although I was thinking more about when you bring it alongside to climb in and out of the damned thing.

[Rich Jones]

It will be interesting to see the boarding ladder Leo comes up with.
No one is going to be hopping on and off Tally-Ho without one.
It should be traditional but easy to stow.

[Hwyl]

Tank issues and a little woodwork.

[Hwyl]

I think he is putting way too much tankage in. 400 liters would be plenty, and he should have the tanks further forward. I like daytanks, but that's just me.

[Rich Jones]

What shoddy workmanship on those tanks! Leaks all over the place. Incredible that the maker didn't pressure test the things before shipment.

As for tankage, Leo is talking about world cruising including having to cross large areas in the doldrums and low-wind high pressure systems. No sense bobbing about in the ocean for days/weeks whistling for wind.

[Rich Jones]

Leo was very diplomatic in the video when talking about the manufacturer. Probably worried about a lawsuit if he trashed the guy.
I wonder what his words were when they first discovered the defects after waiting 6 months for these tanks to show up!

Other than that, all the interior joinery is looking good!