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The Swiss Miss
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7,380 Posts
Don't try to ride as fast as your friends just to keep up. It's ok to push yourself but stay in a range you feel comfortable. You'll get faster automaticly the more experience you gain.

The guys I'm riding with do 100+kmh on the easy to overview runouts of our resort, but they have 20+ years experience. 125 was max one of them hit on our perfectly groomed and empty black slope (with reducing wind break by riding without jacket).

Albeit I'm riding many moons, my limits are well below. I'm rather cautious and my top speed depends a lot on the board I'm riding. With my long/stiff Jones Flagship 158 I do 80kmh with confidence AND fun. But with my shorter softer Ride Farah 153 I'm only confident up to 70kmh. Hit 90kmh with the Flagship once, but this was beyond my "comfort speed limit". Not because of the board, it still was completely stable, but for me this speed was simply too scary.
 

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Not quite reformed yet
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8,439 Posts
x2 what's been said already! 2011/12 was my first full season riding and try as I might, I couldn't crack 30 mph!!

Conditions will probably play a big part in your comfort level too! Late this season, we got some really good snow. Conditions were great on the groomers & I blasted past that 30 mph goal & maxed out around 48-49 mph! Now I am pretty comfortable cruising the groomers in the 35 mph range while I look for places to really fly!! :D Of course all of this was on some pretty great snow! Now if it's really hard or Icy? My confidence takes a BIG nose dive & I'm not willing to go anywhere near that fast!

First few months riding in spring of 2011, I took a couple of HARD slams on the bulletproof shit & it still freaks me out a bit when it gets like that so I slow WAY down! (...next season gonna see about getting a board with some of the more aggressive magna traction tech & see if that helps De-wussify me some!!) ;)

Next season,.. 55+ mph???? ...maybe! :dunno: :D

[Edit]
Oh yeah,.. Tiny, crowded hills & resorts like we have here in MI. can put a limit on your speed too! Some day's it's like riding in a Pinbball machine dodging all the skier's n shit!! :dunno:
 

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Banned!
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7,679 Posts
1. faster than you

2. slow the fuck down you are already going too fast

:cheeky4:

3. the gps on your phone is inaccurate anyway unless you use an app like ski tracks that adds slope into the equation.
 

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2,715 Posts
Fuuuuuck Boulder.........I always find it funny to fuck with Boulderites. Whenever it comes up in conversation, "So.....where do you live?". Boulderite says, "We just relocated to Boulder....couple blocks from Pearl St." I immediately reply, "Oh.....I'm so sorry!". The confused look on their face always makes me smile!
 

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845 Posts
3. the gps on your phone is inaccurate anyway unless you use an app like ski tracks that adds slope into the equation.
Why is this? I thought speed was speed?

Curious because I use ski tracks and as of late an app called maprika, because it overlays your runs on the resort map.

In Maprika it tracks speed, but I don't think it tracks slope and have no idea if it takes that into account.
 

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Banned!
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Why is this? I thought speed was speed?

Curious because I use ski tracks and as of late an app called maprika, because it overlays your runs on the resort map.

In Maprika it tracks speed, but I don't think it tracks slope and have no idea if it takes that into account.
because math and stuff, pretty sure even ski tracks is not doing the math realtime speed/slope, but using an average....
 

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Premium Member
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7,585 Posts
If you look at someone going straight down, like a skydiver, and your above him it appears like they are moving really slow with exception to whatever forward momentum they are carrying. If you look at him from the side he is hauling ass. Gps can't differentiate from the angles that you are approaching the earth so the speed it will see is based on how fast of a forward motion you have. If your going 100mph down a 45 degree slope it would track around 50mph unless something is adjusting for the slope/angle of approach.
 

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Not quite reformed yet
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8,439 Posts
^^x2^^

Slope Matters.jpg

Both these lines are the same length. If GPS sees you've taken 2 min. to travel both of these and slope is not accounted for accurately,.. It believes it took you the same time to travel a shorter distance! Thus it tells you you were moving slower!!!

(...explains why I'm a "Speed Demon" on the Bunny hill and a fucking Scaredy Cat Pussy on anything steep!!!! Yeah, that's it!!!) :giggle: :laugh::laugh::laugh: :D:cheeky4:
 

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Reformed Creep-o-saurus
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6,863 Posts
I've used garmin connect for my tracking, both using cell phone tracking apps, and a proper GPS watch. GPS on it's own is able to determine your elevation (remember it's triangulating or multi-angulating off satellites, so it measures how far you are away from each satellite, and calculates where the spheres line up).

Nevertheless, garmins website corrects for elevation using USGS data (as far as I know)... So it SHOULD be calculating for actual speed on the slope, not just horizontal speed.

That said, and I've said it before: Phone GPSs suck. STOP COMPARING TOP SPEEDS! In my experience, phones seem to vastly over estimate the top speed for the day, and it's wildly inaccurate. I experienced 10-20 km/h swings in top speed from day to day.

After switching to a GPS watch, my speeds dropped to a more reasonable level, and the difference between days on the same hill dropped to about 5 km/h (which seems reasonable to me).

GPS phones are great ways of tracking total distance, and number of runs for the day, as well as showing your buddies the route you took if you split up. But I think they're useless for comparing top speed... :dizzy:

http://www.gpstrailblazer.com/skydiving/
 

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Premium Member
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3,151 Posts
I've used garmin connect for my tracking, both using cell phone tracking apps, and a proper GPS watch. GPS on it's own is able to determine your elevation (remember it's triangulating or multi-angulating off satellites, so it measures how far you are away from each satellite, and calculates where the spheres line up).

Nevertheless, garmins website corrects for elevation using USGS data (as far as I know)... So it SHOULD be calculating for actual speed on the slope, not just horizontal speed.

That said, and I've said it before: Phone GPSs suck. STOP COMPARING TOP SPEEDS! In my experience, phones seem to vastly over estimate the top speed for the day, and it's wildly inaccurate. I experienced 10-20 km/h swings in top speed from day to day.

After switching to a GPS watch, my speeds dropped to a more reasonable level, and the difference between days on the same hill dropped to about 5 km/h (which seems reasonable to me).

GPS phones are great ways of tracking total distance, and number of runs for the day, as well as showing your buddies the route you took if you split up. But I think they're useless for comparing top speed... :dizzy:
Figured out your problem. Try using MPH...
:D:giggle:
 

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Premium Member
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Ah the states, some of the most advanced technology in the world, but the general population hasn't caught up yet! :yahoo:


I like metric. I wish everyone here used it. Working in medicine that's almost all I use throughout the day. I just wish the speed limits in Canada And other 3rd world countries were higher than 80-100 km/h. Fucking granny driving everywhere. I'm surprised I didn't get any tickets while driving around up here. I was doing like 140-150 everywhere. Makes me feel like I'm really hauling ass though.
 

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Reformed Creep-o-saurus
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I like metric. I wish everyone here used it. Working in medicine that's almost all I use throughout the day. I just wish the speed limits in Canada And other 3rd world countries were higher than 80-100 km/h. Fucking granny driving everywhere. I'm surprised I didn't get any tickets while driving around up here. I was doing like 140-150 everywhere. Makes me feel like I'm really hauling ass though.
2 lane highways are usually 100 km/h in AB, and highways are 110 outside of the cities! :yahoo: I usually cruise at 125 without an issue...

I too wish we'd all adopt metric completely. I use metric when I'm woodworking now. It's a lot easier/faster multiplying and dividing whole numbers than it is fractions! Less errors means I do a better job.

In the type of construction I'm in, it's all metric. Tonnes, cubic meters, centimetres of concrete, millimetres of tolerance on the concrete finish.
 

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Premium Member
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927 Posts
40 years old, second year after a 11 year hiatus. Was out about 30 times this year and hit 79 straightlining down a nice chute in powder. That was fun.
 

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Banned!
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This used to be the case but it really is not so much any more. As an instrument rated pilot, I use GPS for instrument approaches. Few years back, a GPS approach was considered a non precision approach because the system did not calculate vertical height and motion well. The average GPS approach had minimums that were on par with an NDB approach ( the least accurate ).

This is no longer the case as both the processing power of GPS units and the improvement in the satellite coverage has increased. A GPS unit, even a handheld or cell phone, has much greater accuracy and the panel mounted units are near perfect. Now with ground based WAAS (wide area augmentation system) these units now allow a precision glide slope approach.

As a result of aviation driven accuracy, all GPS units including cell phones have seen a huge improvement in accuracy and this includes major corrections to this vertical speed error. Today, your small handheld units are highly accurate and the deviations small.

There still exists some potential for error however and that is dependent upon direction of travel and your location on the plant. The GPS satellite constelation is in geosynchronous orbit around the equator. The farther north you are in the northern hemisphere, the lower the azimuth is of the signal and this makes it a little tougher for the unit to calculate vertical height than near the equator. Terrain will also cause more signal degradation. If you are at a high northern latitude in say the PNW on a north facing slope, you loose some coverage from some of the satellites due to geographical interference. It's the same reason your XM radio will cut out in the mountains or in heavy timber. This lapse of coverage intermittently will create errors in the unit and throw your speeds off. Ride a south facing slope in the northern hemisphere and you're golden.

Isn't your pilot stuff a bad example though? I didn't get into the math because I'm averse to it...but with the exception of like fighter pilots.....doesn't most piloting involve pretty low angles? I mean what is the angle of landing approach?

Just axin.
 
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