Hello James, thankyou for those links. I can’t see that the interlacing issue will affect the accuracy of the frame by frame analysis because the accuracy is already so low! I was getting 6, 5, or 4 frames per second between the nose and the middle of the board. Your gps recorder picks the highest speed over 1/10th or 1/100th of a second doesn’t it? For comparison I only need to pick one or two fast frames. Water flowing up the face shouldn’t make any difference at all. Regards, Roy
Roy, I have been following your posts and you are without a doubt New Zealands most incredible waterman.Your rail grab bog squat is the best in the business as are your boards and fins and footage and website and personal style and flair, you are the most amazing individual ever to grace the hallowed pages of swaylocks. But 1 thing Roy, what about a 13’9" fat penguin built in timber weighing say 55lbs with multiple tunnel fins? Roy if any one can do it you can. Go get 'em tiger, you are the guru!
Roy, did you see my attachment clearly marked as an interval of 10 frames moving from board tip to body only
ill let you work out the math i think it puts you in the sub 20 mph zone
just get the gps man !
Soul
Hi James, I would get a gps today but the cookie jar is empty. Did you go through the entire ride frame by frame? There are one or two places where 4 or 5 frames is all it takes to go from the nose to the middle of the board. I calculate that this puts it in the +25 mph category. Regards, Roy
Thanks for the kind words Darren, I thought I was normal but who knows? I don’t know much about those penguins, maybe you should have a go yourself, anything’s possible.
Regard, Roy.
PS The best way to perfect the bog squat is to use a long drop toilet with a squat plate instead of a ‘throne’. If you don’t have a long drop then you can practice by standing on the toilet seat, and squatting down with your knees around your ears. This posture is better for bowel elimination also. Remember to wipe the fooprints off the seat afterwards, and when actually surfing, don’t move the bowels, as it is toxic to do it directly in the ocean.
Hi Roy,
Before any further assertions are made about your surfing speed, it might be more interesting (and relevant) to wait until you can quantify via GPS unit.
Well said Dale. I agree, I won’t post any more speeds till I have a gps.I am still interested if anyone else has a video clip though. Regards, Roy
Hey Roy
You said somewhere else in this forum that you wife films you when you go out. I would like to see more videos of you on your creations. Perhaps you could post links from your website.
cheers
Hicksy
you remember me a friend of mine. when he drives under the influence of canabbis he feels he goes really fast. the truth is he never shift to 2nd gear, and drives all the way home at 10 mph. It’s all about relativity. Einstein was right. Every subject carries his own space and time, and yours are moving faster than mine. Jack.
Maybe those speed estimates from Hawaii are under rated like their wave size? You know, like a 35’ face being “8-10 feet” ?
I’m serious. Have any of those guys claiming 20-25 mph top speed actually been tracked via GPS or radar? Maybe it’s cool to underestimate speed?
Also, hard (maybe impossible) to accurately track the guys going vertical in quick bursts of speed. Roy’s down the line approach to surfing seems like it would be more conducive to GPS time trials than someone like Kelly Slater who does a lot of zigging and zagging while getting from point A to point B. KS’s latitude and longitude positions from A to B wouldn’t reflect that he had maybe gone really fast while going to X,Y and Z along the way. Maybe a radar gun approach would work better for that?
Does a really sucky wave create faster board against water speeds while maybe slower point A to point B speeds? Does board against water spped count? Maybe one of those boat speedometer transducers mounted on the tail would work? A small 12 volt battery and speedo unit could probably be carried in a pack of some sort?
Sorry - just thinking out loud.
Roy, Thanks for the anal insight. You da man !!
Quote:
…I’m serious. Have any of those guys claiming 20-25 mph top speed actually been tracked via GPS or radar? …
…Does board against water spped count? Maybe one of those boat speedometer transducers mounted on the tail would work?..
“Over the bottom” speeds measured by GPS on one of Dale’s mats have already been reported in this thread by soul and Dale. As I recall, the max speed was about 23 mph. Measurements of “through the water” speeds, measured with a pressure guage, were reported as early as 1974 by Michael Paine, as part of his senior thesis: http://www1.tpgi.com.au/users/mpaine/thesis.html The speeds he reported were 5 -10 m/s (11-22 mph). As I previously posted, measurements by persons who have an interest in building functional artificial wave structures (and financial success as a motivation to get it right) of the peel angle of waves successfully traversed by surfers report minimum values (maximum speed over the bottom) of about 33-degrees (for small waves, with the angle increasing with wave size). For a four foot wave (moving about 15 ft/sec, or 10 mph at the breaking point) this would correspond to an over the bottom speed of about 27-28 ft/sec, or ~19 mph. A six foot wave (assuming the 33 deg. peel angle hasn’t decreased) would give 23 mph. Seems to me that all of these methods give comparable magnitudes. “Over the bottom” speeds obviously relate to whether or not one makes the wave; “through–or over–the water” speeds relate to the prediction (or deduction) of the board’s hydrodynamic qualities. MT
I didn’t read the whole thread so forgive me if this is redundant. I keep seeing references to GPS and other devices for speed measurements. Wouldn’t it be simple enough to put two buoys out at a known distance from each other, have the surfer take off behind one of them and measure the time it takes to get past the other? R=D/T
Its all Common Sense.
For Decades its been reported in the popular surfing literature
that maximum surfboard speeds in either large waves or
extremely fast breaking waves were 25mph, maybe 30.
Thats in a class of waves that most of us dont have access to
for surfing.
The popular literature just reflecting results from various
studies.
How anyone can think they are going 25mph in small lackluster
waves on equiptment that has more drag because of humongous
board length(longer than any traditional board in any age) and more fin area and fin drag than any fin design
that has come before…well it goes into the category of
either self delusion or unconquerable ignorance.
For perspective…
“We are not going fast, you just think we are… maybe we might hit 30 mph in a big drop. If you don’t believe me, get on a hood of a car and find out!”
Bob Simmons - Legendary Surfers - “1947 & Radical Changes”
When I am on my Paul Gross shaped Simmon’s outline (10-4), I go fast. The feelings and sensations of speed are intoxicating and at times perhaps deluding, leaving me thinking(this is where it gets dangerous) that my board is the fastest in the water.
Surfing is all about the feelings. Thinking is mostly toxic pollution for humans me thinks.
Flying down the line like a hood ornament!!
Roger
CALL ME 3169 this is my viewer # of this thread the controversy is everlasting 'bout whooz da vastest…damn aint we all about fast? the limits of acceleration and glide are a major part of our collective facination…the measuring of this speed is a great mental exercise and the depth of the concern is vast…nobody wins but we can all throw in…ambrose …I say great thread and I stand at 186 000 mi per secomd and I owe it to waikiki
Halsose,
-
A longer board does not necessarily have ‘more drag’.
-
More fin area does not necessarily mean ‘more drag’
-
‘Traditional’ boards longer than my 11’9" have previously existed
-
Your opinion on my speed analysis has no factual basis or intelligent content
Your attitude would possibly be welcomed at the flat earth society but has no place in a rational discussion.
R.S.
Hello Surfthis, It would work in principle. What we are doing with video analysis is similar.
An interesting historical statement Dale, but if we are supposed to be taking it as a serious argument against the idea that it is possible to go ‘fast’ then I am going to continue to do video analysis and post the results. You suggested that I shouldn’t do so presumably because of possible inaccuracies but what could be more inaccurate than the kind of statement made by Mr Simmons?
Of course it is fun to swap quotes as a lunchtime diversion from the scientific task at hand, so here’s one:
'A winner says there ought to be a better way to do it; a loser says “That’s the way it’s always been done here”. ’
( Sydney J Harris ) Winners and Losers pg 28