Q23 flies

Norm

Anarchist
579
2
wow - looks good

what is the wind strength ?

Doesn't look like much wind, although most video footage doesn't seem to reflect actua; windstrength

 

hughw

Member
338
73
uk
8-10 knots, boatspeed about 14 uphill and touching 20 down. But early days and theres a bit more to come yet when things get set up better and we've done some proper testing with different settings.

 

hughw

Member
338
73
uk
got about 60 kgs in the bulb which is enough for 90 degree stability as well as leaving on a mooring - fin is 18. It's just enough too so that if you want to sail/race without the foils then gives the boat a nice feel for when people are having to learn the skill of sailing a scow hull at a heel angle!

 

hughw

Member
338
73
uk
some exhaustive testing planned for this boat and then was always aimed at being a 3 man sportsboat that anyone can go foiling around the place in.

Production plans yes - we are inviting feedback to see what peopple do and don't like, a lot of sailors will be having a go on it too. We've got some minor mods pencilled in but so far its all pretty much worked as it's supposed to.

Also thinking about a smaller - say FDish sized 2man boat along similar lines, and could also do a very nice one at say 30' that really would have some pace:))

However, we want to keep the concept as a simple, easy to fly and quick sportsboat - no need for complex systems that need twekaing and adjusting all the time, boat does all the work and you are along for the fun.

This too is all glass apart from rig and foils, so costs can be kept under control and we've ideas on how to build foils in production friendly ways to help on costs there.

 

Speng

Super Anarchist
4,987
13
Cincinnati, OH
Bulb is irrelevant sailing a scow at the heel angle is not that difficult, as is the spinnaker guff at those speeds you can't carry a kite anyway. Take 50kg out of the boat and it foils even better.

Bigger is not better with foils so forget the 30 footer.

 

hughw

Member
338
73
uk
Bulb is irrelevant sailing a scow at the heel angle is not that difficult, as is the spinnaker guff at those speeds you can't carry a kite anyway. Take 50kg out of the boat and it foils even better.

Bigger is not better with foils so forget the 30 footer.
have to remember that this is a bit different conceptually to the E/C scows - it's lighter than a 20' C scow with bigger rig and less beam so is naturally tippier.

Interestingly it's not so much the overall displacement that affects take-off speed as the generated power - so 50 kgs yes might fly fractionally earlier, but its getting the power into the boat that counts - so sailing three up and no traps gets to fly almost exactly the same as 2 up and on the wires. It's a drag thing rather than displacement, and this hull form at this displacement has minimal drag change for 50 kgs difference.

Anyway, will be sailing with Michi for 5 days next week and get some more information on it all and do some structured testing.

Going bigger - plus for this would be to deal with sea conditions but it wouldn't change the speeds significantly so that would be the reason for adding some length.

 

nedev

Member
75
1
Extremely cool!

Is the scow hull shape a relevant factor for the flying? I could imagine that if sea state comes into play a "normal" hull shape has advantages.

Cant wait to see an actually flying dutchman!

 

hughw

Member
338
73
uk
Zurich and then possibly Lucerne for more wind and waves depending on what the weather does...

Scow form - for this boat it had quite a number of attractions, and one of the main ones was that in the event of a 'departure from controlled flight' as our aviating friends would have it then all that happens is that it bounces and pops straight back up into flying mode with very little loss in speed.

Flat stone on pond stuff, but something with a pointy front end has every chance of tentpegging/ploughing and then loses speeds and is off the foils at best, at worst then only got to look at a few Moth clips!

On top of that, we get a nice wide base for the foils to start with which helps get the required righting moment without the complications and expense of racks, and then we can also have a low windage boat when in airborne mode.

Uphill with some heel on then it cuts through waves very nicely - sail it upright though and both noisy and slow. There are other things in there too, but those are the primary drivers for this particular boat

As ever there are some compromises as with any boat, but from these first weeks of sailing it all seems to work very nicely, we have stable flight without needing wands and other complications, and really any reasonably competent small boat sailor can jump in and 10 minutes later is happily flying.

 

P_Wop

Super Anarchist
7,113
4,263
Bay Area, CA
This is so good, Hugh. Nice one! Looking forward to news on developments and tweaks.

Must be a rather interesting section on the foil - low speed lift vs high speed drag must have provided you with some entertaining calculus!

 

Spoonamore

Member
129
16
PA
Members of our Y Flyer fleet (19' Scow) have been kicking around some of the same points Hugh. The light wide and flat set up would just skip along if you lose foil. Well done.

 




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