GGR 2022

littlechay

Super Anarchist
1,137
517
Nelson
Recent experience using a ElectricYachts QuietTorque 10 electric motor (equivalent to a ~18 hp diesel) with a 300 Ahr, 48V LFP battery system comprised of 12V, 100Ahr Battle Born batteries along with 3 SunPower 110W solar panels while crossing from San Francisco to Oahu in a 30ft, 11,500lb, full keel sailboat....no you can't continually motor sail with the prop turning at ~900 RPM with this setup. We did motor sail for several hours when becalmed on two separate days so we could get ahead of weather fronts, but we then needed a few days of good sunshine to fully recharge the batteries. Sure we didn't have optimum placement of solar panels relative to potential shading, but using the motor continually was far from being our plan. We did run the motor in "regen mode" a few times during the crossing to charge the batteries, but it was mainly to slow the boat down a bit when the wind was 25 knots and above. I also have two 50W panels to keep the 2 batteries for the 12V house system topped off. We never had a shortage on the house side.

If you want to do continual motor sailing with an electric motor you will need a diesel or gas powered generator, more solar, and/or a wind generator. Not sure why you want to continually motor sail, but to each their own.

View attachment 558829
Your panels would not survive a good rinsing either, that has to be a consideration for this type of event.
 

littlechay

Super Anarchist
1,137
517
Nelson
Absolutely correct. Panels were put out in that configuration under tame conditions. It's pretty trivial to take them down and stow them quickly if necessary.
Yep but for ocean passages in the high mid latitudes they would have to be permanently mounted and finding a functional place for solar is an issue on boats of this size. But for cruising in not so tricky stuff your solution is good. I have used similar. Panels can be stowed under a mattress when not in use.
 

Kolibri

Member
488
575
Haleiwa, HI
Simon has been stuck in a lull for the last couple days. Kirsten and Abhilash are closing the gap. The next several days could get very interesting.

1671224052602.png
 

Jambalaya

Super Anarchist
6,768
154
Hamble / Paris
So talk me through this running sail. The high cut clew furling jib/genoa I understand. What is this running sail, not kite material or sizing and not a jibtop either ?

K leaving Hobart btw

DB9B8C23-3CDB-47D4-BA42-AEEA557BDD1F.png
 

trisail

Anarchist
508
564
So talk me through this running sail. The high cut clew furling jib/genoa I understand. What is this running sail, not kite material or sizing and not a jibtop either ?

K leaving Hobart btw

View attachment 562619
Good evening,
It is a two ply sail.
Both the luffs are stitched to a single boltrope which fits into the roller furler foil.
The two clews are separate.
When heading upwind or reaching, the two plys lie together and the sail looks and sets like any headsail.
When you run you seperate the two plys and pole out the windward ply. The leeward ply fills on its own same as if it was the leeward or leach area of a spinnaker. Or you can set the leeward ply on a second pole if you want to. I don't think Kirsten does that though.
You can reduce the sail area while running by just furling the two plys together on the furler. The headsails areas stay balanced.
When you go onto a reach again, you just let the weather side sail flop over onto the leeward one.
Some maneuvering with sheets are required.
North Sails in Cape Town suggested the sail for her.
Regards.
 

littlechay

Super Anarchist
1,137
517
Nelson
Good evening,
It is a two ply sail.
Both the luffs are stitched to a single boltrope which fits into the roller furler foil.
The two clews are separate.
When heading upwind or reaching, the two plys lie together and the sail looks and sets like any headsail.
When you run you seperate the two plys and pole out the windward ply. The leeward ply fills on its own same as if it was the leeward or leach area of a spinnaker. Or you can set the leeward ply on a second pole if you want to. I don't think Kirsten does that though.
You can reduce the sail area while running by just furling the two plys together on the furler. The headsails areas stay balanced.
When you go onto a reach again, you just let the weather side sail flop over onto the leeward one.
Some maneuvering with sheets are required.
North Sails in Cape Town suggested the sail for her.
Regards.
Roll inducing machine. Better used well off dead down wind to avoid the death roll. :)
 

Jud - s/v Sputnik

Super Anarchist
6,542
1,889
Canada
So talk me through this running sail. The high cut clew furling jib/genoa I understand. What is this running sail, not kite material or sizing and not a jibtop either ?

K leaving Hobart btw

View attachment 562619

Coupla links on double headsails (whether twin luff grooves on furler foil,
or using a Solent rig, the second article):



The vid on the GGR site with Don McIntyre sending Kristen off has some description of how it works, as she’s on board setting sail, and he’s on the pursuit boat describing how’s she setting things up as she’s working on deck. Some description too, I think, on the vid of her arrival in Hobart. BTW, Mark Slats effectively used twin headsails in the last/first GGR.
 

Latest posts




Top