Slipstreams & Slipping Sands

IN THIS RANT: the ‘slipstream’ phenomenon, and why we need to keep much greater social distance when exercising outside – sprinkled with beach pics and boating right-of-way bits.

I’m still driving to Breezy Point from time to time to slip the park crowds on nice days. Why? Social distancing doesn’t seem to apply to bikers and joggers.

Maybe it’s self-centered laziness. Maybe it’s a healthier-than-thou attitude. Hopefully, it’s lack of awareness of what I’m going to write about below. But regardless, just like “Red, Right, Returning,” it’s WRONG. No, that’s not about right-of-way, but still…

Cute birds slipping the surf at Breezy Point the other day. Even at high tide, when the surf encroaches on our social distance space, it’s easier to get in a good walk and maintain social distance than at some NYC parks… and this is still in NYC! Steve Card, photo.

The image below is from a post by Jurgen Thoelen on Medium, which describes how studies in Belgium and The Netherlands conclude we need to allow MUCH more distance between us when exercising in public by biking and running. Even just walking. Jurgen sums it up well:

When someone during a run breathes, sneezes or coughs, those particles stay behind in the air. The person running behind you in the so-called slip-stream goes through this cloud of droplets.

Jurgen Thoelen, “Belgian-Dutch Study: Why in times of COVID-19 you can not walk/run/bike close to each other.”
The slipstream effect: social distance has to increase exponentially (a LOT) when people are moving at jogging and particularly at bicycling speeds.

I’ve been bitching about bikers and runners zooming (or slogging) right past pedestrians since this crisis got real. They often don’t take any care to pass at any distance, breezing – literally – as close as a foot or two past others. They’re breathing harder, and exhaling it onto those they pass.

As a lifelong sailor and angler, I’m acutely aware of the breeze at all times. I take care to try to stay upwind of anyone talking, breathing harder for any reason, and now – at the near apex of the infection and body count in NYC – not wearing facial covering or a mask. I mostly walk for exercise, but when weather favors it I ride my bike in Riverside Park on the mid-level esplanade. That way there’s room to see what’s ahead, and astern – with no surprises. I had to all but give that up with the extra crowds on nicer days as more people have more time to get to the park. It’s the only bright side of things for many people.

One’s upwind of the other; the one-footed boob is in the ‘slipstream’ of the other as the wind is head on (from ‘bow’ of far bird coming back toward ‘aft’ or ‘astern’ bird and camera. But wait, you say – no slipstream as they’re not moving. Wrong… wind. Steve Card, photo.

So, when I’m to windward of them (upwind), I’m also aware of the breeze carrying my breath in their direction. I stay farther away. Same for walking down the street. Windward sailing vessels give way to leeward ones (downwind) when they have the wind coming from the same side. Right or left; starboard or port… doesn’t matter what you call it as long as they both have it on the same side of their vessel. The problem is that on the pavement or in the park, people aren’t meeting me – or others – half way in return.

(Meeting, for right of way, is when two power driven vessels are approaching each other head-on or nearly so. This rule doesn’t apply to sailing vessels.)

One day in Prospect Park, that caused me to politely call out a passing pair of peeps (couple) who didn’t make any effort to walk in-line rather than side by side, forcing my other half and I to leave the road and walk in the dirt. The response I got was inappropriate, and so the convo degenerated. Who needs that when trying to maintain social distance while maintaining mental and physical well-being? Sheesh…

Breeze blown surf foam at Breezy Point, with a few random peeps for perspective. Steve Card, photo.

I’ve actually given serious thought to speaking softly and carrying a social distance stick with a fuzzy soft end (like a long handled duster). That can’t be construed as a weapon if aimed at a crossing biker or runner who won’t keep clear, right? Eh… let’s not go there, and so I don’t take the stick with me. Yet.

(Crossing is when two power driven vessels encounter each other, and they’re not meeting. So, they’re each to the other’s side. Even if one is coming slightly from behind; just not mostly. Yes, this gets technical; no, we don’t need to fully elaborate here. If you’re coming mostly from behind, you’re overtaking and you keep clear of what’s ahead. Guess what? That applies to sailboats coming up on power boats! Yeah. Back to our health…

6 feet away, or 6 feet under!

Steve Card, frequent recent rant. I penned it, but later saw that someone else came up with a slight variation so I’m sure many others have.

…for walking, the distance of people moving in the same direction in 1 line should be at least 4–5 meter, for running and slow biking it should be 10 meters and for hard biking at least 20 meters. Also, when passing someone it is advised to already be in different lane at a considerable distance e.g. 20 meters for biking.

Jurgen Thoelen, in the Medium post we’ve referenced and will link to below.

So, 6 feet ain’t nearly enough! Not unless we’re walking slowly with no wind, or stationary.

That’s the takeaway. I bike; I get it. It’s hard to keep distance when people are everywhere, often moving at different speeds and directions, on foot or on a ‘vessel.’ That can’t be an excuse; it’s potentially dangerous to others…

  1. You might be infected and contagious and not know it.
  2. You might pass someone else who is.
  3. Forget SARS/COVID-19: you might hit someone!

So, if you can’t Overtake, Meet, or Cross responsibly… JUST DON’T DO IT.

Surf scenery, social distance style. Breezy Point. Steve Card, photo.
Here’s a link to Jurgen’s post on Medium with more insight into that study…

https://medium.com/@jurgenthoelen/belgian-dutch-study-why-in-times-of-covid-19-you-can-not-walk-run-bike-close-to-each-other-a5df19c77d08

We Started Sailing!

Well, yeah – we went out on that super warm day in February, but that doesn’t count.  We officially kicked off our 2018 sailing season on March 31 and Easter Sunday, April 1.  No foolin!  On both days we chose our Pearson 10M, Kilroy Was Here.  (Our Pearson 26, Second Wind, was an option as well.)

The Longest Season in the NortheastSM – another way we give you MORE.

Anywho, Saturday saw light and variable breezes to start out, including a little motionless hang time.  It’s all good in the Sound and its surrounding bays and harbors… there’s little current, and very predictable commercial traffic.  Soon, enough wind picks up to sail meaningfully, even as little as 5 knots.  (Don’t try that in NY Harbor and the Rivers.)

See the trimaran between the boys? It was our only sailing company the whole weekend. it seemed to appear from Manhasset Bay, a quick sail even for a monohull from City Island or vice versa. Kept photo bombing us!

Later, the southwesterly picked up just like a summer sea breeze, but cooler of course.  We made it to Stepping Stones Lighthouse, our modest goal, before that and rode it almost to Fort Totten off Little Neck Bay.

Sailing wing on wing up the Sound as we cruise back toward Stepping Stone Lighthouse on Saturday. Open Long Island Sound is behind and to the right.

We passed the light again, then decided that was plenty of fun and rode the building breeze back in to get docked up.  This was a Club sail with two members present- Adam (graduate of several of our courses who went on to bareboat in the BVI based on that), and Piers, a recent learn-to-sail graduate who’s going to take 105 next weekend and 103 & 104 as the season progresses.

The wind picked up nicely after reaching the light on Saturday and we flew back north before turning into Eastchester Bay to berth the boat.

Easter Sunday was a teen outing put together by a long-standing client and friend of the Sailing Center, Jim, who has a small daysailor of his own.  The young adults had a blast, all taking turns steering, and eventually letting Jim have a shot.

Teen trip on Easter Sunday! One more hiding out of sight somewhere, plus the Dad of two who put it together. Stepping Stones starting to look familiar back there?

We did the true City Island-style Lighthouse Loop!   Okay – technically, not – we didn’t go around Stepping Stones.  Not worth it; tricky passage and waste of distance and time.  But we went just past it and turned and looped alongside.  Good enough.  Then, we went very close to Gangway Rock, cutting between it and it’s very nearby gong buoy.  How  close?  THIS close…

Gangway Rock Light, off Manhasset Neck. Gorgeous picnic spot – there’s a deeply curved bight with a beach that locals call Half Moon Bay. That’s an osprey flying in the photo. Almost always a next on the lights near City Island, making for numerous birdwatching (and listening) options.

Then, on to Execution if the wind held and the teens steered well.  And both did their duty.  So, we went all the way around Execution and its red nun on the far side, and then tacked to head back to City Island Harbor and then around into our off-season slip for Kilroy on the Eastchester Bay side.  Lovely ride.

Approaching Execution Rock Lighthouse, Easter Sunday. Fun, easy and safe itinerary – out around the light and back! Have to look at the chart and see what marks the safe passage, but if you bother, it’s easy.

Did we mention the fun?..

Post faux-Titanico fun on Easter Sunday aboard Kilroy Was Here.

Want to get in on it?

Our Sailing Club has Skipper memberships for those of you who are ready to just go.  We also have Social/Crew memberships for those who are not.  Want to bridge the gap?  Of course, as a school, we have courses, clinics and even private instruction.  We have what you might need not just to skipper a day sailor in Long Island Sound, but to cruise the whole thing or charter a Bareboat yacht in the Caribbean, the Mediterranean, or anywhere else charter companies exist for that.

Want to see some clips?  Here are two on Insta…

Saturday’s Club Sail

Easter Sunday Teen Sail

Want to learn more?  Here you go…

Sailing Club Memberships

Sailing Courses, Clinics & Privates

Instructional Sailing Vacations

 

 

 

Turn Initiation: it’s not just for Skis and Snowboards anymore…

As we’re deep in the throes of a cold start to the winter – polar vortex/arctic blast kind of cold – thoughts are somewhat removed from sailing.  But not entirely.

While on the slopes enjoying fresh pow over the holidays, and warming back up to techniques shelved during the boating season, I was reminded of the concept of turn initiation.  Don’t ski or ride?  Don’t even sail yet?   No problem – we’ll break it all down and maybe even get you stoked in the process.

Looks like this rider either tried an abrupt start or ending her last turn that way. Wasn’t there; can’t be sure. But it looks like she made a zig-zag of quick pivot turns in a that are on the right in pic. Her edge and bottom of board are a brake right now. Good if she wanted to stop quickly. How does that translate to the rudder of a sailboat? Read on…

“Turn initiation” is the technique used to get a ski or snowboard to go from flat on the snow to beginning a turn to one side.  Anyone who can link turns on either kind of plank knows what I’m talking about.  It’s like this: we make certain motions to suggest to the equipment that we want to turn instead of going straight.  After it starts listening, we add more motion to shape and complete the turn to the extent we want.  Regardless of what kind of turn we make, we have to start it – and eventually end it.

Same with boats!  Techniques, and consequences for ignoring them, are different.  Thankfully for sailing, there are usual no real consequences.

If you ski or ride, but are beginner to intermediate, it’s time to think about this again as you begin your snow sliding season.   You experts out there don’t think much about it, but warm up your technique and self-critique as you get your form back each season.

These guys are about to go down a moderately steep trail at Killington in Vermont. Skiers have two planks. Duh. Translation to sailing? Twin rudders that can operate independently. Kewl!

Back to sailing and turning a boat.  Let’s leave special techniques like steering with sails, and with body weight, out of it and focus on the thing we all use all of the time: the rudder.  (Don’t even sail yet?  That’s the fin that we turn back in forth behind the boat to make the boat turn, like a paddle stuck in the water and angled to one side.  Makes the boat turn.)

At the most basic level, we angle the rudder to one side or the other when we want to turn a boat.  Some boats have a stick attached called a tiller, found on smaller boats and almost mandatory to learn with.  Once the boat is in the upper 20-foot range, and especially at around 30 feet, it tends to have a wheel instead.  As the rudder is angled more to one side, the pressure of the water hitting it pushes it back the other way, taking that end of the boat with it.  The boat pivots in the middle, and turns.  (The direction the fin aims is also where it want to go once it gets moving.)

So, to make a slight or narrow turn, the rudder does not need to angle much to the side.  To make a sharp or tight turn, the rudder needs to move pretty far over.   Turn initiation is really the rate of motion to get it started, so that the whole process works better.

On a board or skis, if we suddenly wrench the plank over to the side, we often catch an edge in the snow and catapult or slam.  No fun.  But if we get the edge to gently start engaging, and then add more edge and pressure, we can smoothly get the plank on its edge and into a turn.  Can’t usually skip steps: have to START the turn before shaping and completing it, before ending it.

I haven’t skied since I as a boy, but I’ve watched a lot of skiers.  Good skiers are graceful in their transitions.  I’m a pretty solid boarder – somewhere in the advanced range by objective standards I’ve come across. I’ve watched a lot of boarders too.  I won’t pretend I know how to turn skis.  But Im supposed to be expert at understanding how to turn a board, as I’m a certified instructor.  So, I’ll talk about boards.

“I PISS on snowboards and boarders!” That you?  That’s fine. We’ll just shred around you and share the slopes with others.

For most turns on a snowboard – and some experts say all – we initiate by twisting the front of the board slightly so one edge is pressing into the snow and the other starting to lift.  Think of holding the ends of an ice cream stick with your thumbs and forefingers.  Now, think of holding one end level, but rotating or twisting the other end slightly.  That’s the general idea.  In the air, this does nothing but flex the stick.  But on snow, one edge of that stick presses into the snow, and starts to take the rest with it to that side.

Of course, we add some at the other end, and make more of a turn.  And, release.  And, rinse and repeat, maybe mixing it up from time to time to not get bored.

How do we translate this to turning a sailboat?

Think of the rudder as the edge.  initiation is turning the rudder ever so slightly to suggest to the boat that it should stop going straight, and to pivot.  Once it listens, we gradually increase the rate of turn but angling the rudder more.  But at what rate?  And how far?

This is the beautiful part, elegant in its simplicity.

We slowly, steadily, move the tiller to the side.  One simple, steady motion.  Easy.  How far?  Until we like how much the boat is turning.  For how long?  Until we’re half way through the turn, at which point we reverse the motion at exactly the same rate.

What if we need the turn to happen quickly?  Well, there is no shortcut here unless we’re throwing the boat around with our body weight, and/or using sails to help turn the boat.  Again, let’s leave it at rudder only for this discussion.  (And even when we’re using other techniques, rudder action doesn’t change.)

Too many sailors just jam the rudder over hard when they want to make a quick and/or large turn, especially for tacking (crossing through the wind quickly and ‘catching’ it again on the other side).  Jamming it over skips the initiation.  Consequences?

Drag.  The rudder is now sideways to the water, creating lots braking resistance.  Imagine gliding along in a canoe or kayak, and suddenly jamming the paddle in the water off the back end, with the flat side perpendicular to the direction of travel.  Sea brakes!  Craft slows down.  Think of air brakes on a plane.  Overuse them at the wrong time, and the plane starts to drop.

Stalling.  Because it’s angled too aggressively to the flow of water, the water doesn’t flow around the far side of the rudder, and and bottlenecks against the near side.   Water flow around the rudder allows the rudder to take the back end of the boat with it in an arcing turn, and therefore makes the front go the other way, pivoting around the middle.  Stall the flow, and we stall the turn.  (This also increases “leeway,” both when turning and when trying to go straight, for those with more sailing savvy.  It’s why excessive rudder angle has to be dealt with one way or another when going straight.)

Sorry, only one color still had ink… On your left: outline of a sailboat and its rudder, shown twice – straight, and also cocked slightly to port (left). The curved lines and arrows show how the water would flow over it on both sides and allow good turn initiation. On your right: severe rudder angle typical of many sailors when they make a large turn, especially to tack (cross through the wind quickly). Arrows and squiggly lines show turbulence with little to no water flow.  This is what happens if you simply jam the tiller over.  What a drag…

It’s slightly counter-intuitive at first.  “I want to turn hard, so why not just turn the tiller/wheel hard?”  Doesn’t work that way.  You’ll get there sooner by starting slower.  A slow, steady, linear motion of the tiller (or wheel) gives you everything you need:

  1. Turn initiaiton.  Suggests to the boat what you want to do, and it gently begins.
  2. Shaping.  We turn the rudder enough to get the turn shape/speed we want.
  3. Completion.  So simple – half way through the arc of the turn, we just reverse what we did with the rudder at the same steady rate!

The tiller moves in a linear fashion, but the boat turns in a crescendo/decrescendo.  See?  We’re teaching to both logical learners and musical/rhythmic ones!   If we graph it out, we’ll see different patterns for the tiller and the boat…

On your left: graph of what the tiller motion is like – linear in speed.  On your right: the effect this has on both rudder angle and boat’s turn shape: good turn initiation, shaping, and completion. WooHOOO!

The more rudder angle, the greater the turn.  To get there, we simply move the tiller steadily to gradually increase rudder angle, and therefore the rate of turn.  Your boat will take over, and the rudder will follow.  When you feel that, you’ll know you got it right.

Then, you’ll be ready to shred!

Want to learn more about turning a sailboat?  See us at NY Sailing Center in the spring.  We start in April.

Want to learn how to snowboard?  Already ride, but want to improve or take it to the next level?  Our Director, Dockmaster and rambling Editor at Large, Captain Card, is a certified snowboard instructor who loves to teach.  Hit him up to discuss getting out on snow.  This can be as close as Mountain Creek, NJ (an hour from the GWB), as far as South/Central Vermont, or mid way at Hunter or Windham in the Castkills.