yuri_base

200ft is my no-fly zone around tandems, always fly tangentially to their direction (that is, my speed is perpendicular to theirs) in front of them and maintaining the same minimum distance (>200ft) from them to my line of flight, and aim to be slightly lower than tandem at the minimum distance. An analogy: shooting a gun with somebody standing on either side of you at a good distance is one thing, aiming at someone and saying "I'm gonna miss you by a few inches, don't worry" is another... Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

For best performance, don't forget about the shoes! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

What are the changes from V-2? Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

This is the end of the world as we know it. Today, the much feared tectonic shift finally happened: the gay flowers of freefly pants made its way to wingsuits. I promise that I'll give up skydiving when I see two men in pink wingsuits ornamented with freefly flowers holding their hands on a dz and discussing how many times they touched each other in freefall. If I bump into them on a mountain, I just won't pull. I might not have high moral standards of Mother Teresa or pope, but this is way too revolutionary. Jarno, you're my hero! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

This totally makes sense. In the first approximation, speed depends only on wingloading (given the same coefficient of lift and drag). A 230lbs exit weight jumper and a 150lbs exit weight jumper can fly a 230 Spectre and 150 Spectre, respectively, side-by-side touching their endcells without giving any input to equalize the speed. If we take the drag on the jumper into account, however, a smaller canopy with light jumper should fly a little bit slower and with a little bit worse glide ratio than a heavy jumper on a big canopy with the same WL. To see why, imagine an extreme scenario: a 1lbs carton cutout of a person's silhouette (full size) under a 1sq.ft. Spectre.

The only reason to FLY a wingsuit is that people don't call you "flocker", the most embarrassing F-word on the planet. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

So, L/D is about 2.2 (the increased glide from 15 to 35s is a planeout). James, can you post the data as an Excel or text file? And do you have the distance covered on this flight? Thank you. Yuri Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

L/D Calculator is a tool to calculate average L/D and sustained horizontal and vertical speeds from time, distance and height flown on a BASE or balloon jump. It uses Wingsuit Equations in assumption of constant L/D, and lift and drag coefficients throughout the flight (hence, the result is "averaged" in this sense). Also, it assumes that there is no wind and exit speed is zero. Range of horizontal Vsx and vertical Vsy speeds from 20mph to 160mph is divided into grid with a step of 0.5mph, and for each point in the grid, WSE are solved for the duration of your flight to calculate the distance and height flown. The combination (Vsx, Vsy) that results in closest match is the answer, and L/D = Vsx/Vsy. Enjoy! Yuri Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Possibly. From your description it sounds like a misbalance you cannot compensate by changing your body position, in this case rebalancing by extending the leg wing might help. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

C# class library that solves WSE. Open the solution in Visual Studio 2005, hit Ctrl-F5 and read the important message from Che Guevara. Enjoy the shrooms! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Another magic L/D discovered: 2.631 is L/D sufficient for level planeout after reaching maximum possible vertical speed while spiraling headdown. Based on the assumption that all of lift serves as centripetal force and that drag simply equals to weight, the maximum achievable speed (while flying fully spread out, and with the same AoA as for given lift/drag coefficients Kl and Kd) is Vymax = 1/sqrt(Kd). Feeding this initial speed into WSE produces this magic L/D = 2.631, which is independent of wingloading and actual values of lift and drag coefficients (i.e., it's universal - applicable to all flyers). All in all, we have 3 magic, universal L/D's: 1.414 is L/D to achieve maximum horizontal speed possible 2.631 is L/D to achieve level planeout after reaching maximum vertical speed by spiraling down 3.567 is L/D to achieve level planeout after zero-speed exit It's pure fucking magic!!! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

You want some? Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

You probably meant pitch angle, not angle of attack. You do not directly control AoA, but it is rather the "indirect" variable which depends on both your pitch angle and your glide angle. AoA is the angle the relative wind makes with [some reference line of] your body, and is simply glide angle G minus pitch angle P. For example, if you're 10 degrees headlow (P=10) and you're gliding at an angle G=45 degrees (L/D=1), your AoA=35 degrees. If you're the same 10 degrees headlow, but you're gliding much more efficiently (G=22 degrees, L/D=2.5), your AoA is 12 degrees. For given pitch angle and body position, there could be different stable sustained flight modes (see wingsuit hysteresis). That's why you sometimes max out and yet barely move forward - because you did not arrive at efficient value of AoA by controlling the pitch in sync with the changing glide, and "got stuck". If the balance is off (for example, you're able to achieve very good lift from your armwings, and it tips you up), then you cannot achieve high L/D because the equilibrium AoA is off. This is an example how achieving better aerodynamics without paying attention to this interdependence of pitch, glide, and AoA, can hurt the performance. In this case, rebalancing is needed - for example, either by adding trailing edge extensions, or by using weights. (using weight is an easy way to see the effects of balance and finding out what you need to change) Trying to achieve right balance by relaxing legs, arms, bringing knees down, dearching more, etc. does not necessarily improve L/D because of this interdependence. Phantom has a very good armwing (solid inflation, smooth leading edge, easy-to-tension and not prone to flapping trailing edge, small and efficient inlets) which is easy to make produce a lot of lift, but the legwing lacks a bit of power, so Phantom is prone to put you in a bit head-high pitch angle. Managing weight distribution (e.g. 4lbs camera on helmet and sneakers vs. no helmet, heavy 4-5lbs boots) is important, as well is history, - or else you can get stuck at 1:1 glide ratio. To summarize, the most important thing, in my opinion, is the constant visualization of AoA (by feeling the relative wind hitting your face, and by observing your glide and pitch angles and subtracting them) during your flight, awareness of balance, and managing the history of your flight to avoid hysteresis. Yuri Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

3.567 is the magic L/D at which wingsuit will fly horizontally after a natural planeout on a BASE jump. With L/D higher than that, you'll even temporarily go up. In the attached example, wingsuit equations are solved using Mac's Grapher utility (Grapher file with WSE is attached in .zip) for a range of L/D's and polar curves (horizontal axis - horizontal speed, vertical axis - vertical speed) are plotted. Starting with zero initial speed, the vertical speed momentarily becomes zero if L/D = 3.567. Running the equations for a wider range (L/D from 0 to 25) creates an interesting 'psychedelic' picture. The race to achieve the magic L/D = 3.567 started today. If you're not in, you're not revolutionary enough! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

I made a mistake - was looking at the wrong place in data, it's hard to identify the actual landing (~20-30 data points) in the sea of noisy data (~5000 points). That L/D = 0.6 was an artifact of applying the theory that requires horizontal flight, while it was in fact the front riser turn. Here's what I think is the actual landing. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Forgot to turn off smoothing (the graph above was smoothed over 10 adjacent points), here's the raw data. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Great success! Here's the result of Vadim's swoop at the Ranch. He used toggles which explains relatively low L/D. It'd be interesting to see the results for risers as well as for different canopies. The device works in horizontal flight, and it does not need to be actual swoop: you can practice high in the air and level off using the accuracy trick. Zee best is yet to cum! Yuri P.S. Two accelerometers were used that recorded data independently (blue and red lines on the graph). Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Fuckers, they steal my ideas. And that's awesome as long as it's useful for advancing the dream of human flight. Just by looking at the pictures of these little suckers... they suck! we can do better! Much better. Because they're limited by bones and landing, we're not. And we got BRAINS, too... at least, some of us. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Tristan, that's BRILLIANT!!! You're one of the most revolutionary WS people in the world! Only V-2 owners will understand the point. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

As a person who has highly artistic tastes comparable that of Picasso and Van Gogh, I feel this event does not meet high standards of artistry as it is. It needs to be a triathlon. In addition to wingsuit round, there should be two more: tango and synchronous swimming. Yes, you heard it. The true beauty of two men touching each other cannot be fully expressed without these more intimate art activities. While I have no clue who will win the wingsuit round, I'm pretty confident that Jarno and Costyn will win the tango round, while Jeff and Tony will take the hearts of the spectators in synhcronous swimming like a storm. Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

13:6 We wins! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Does anyone else here have BLPS? BLPS - Bent Legs Pain Syndrome - is a condition when you can't bend your legs, or half-collapse your amrwings, or arch when you're flying wingsuit - because it almost brings you physical pain, or is equivalent, in some sense, to physical pain. It's when you can't watch any video of flocking with a bunch of people "flying" with bent legs. It's simply too painful to watch! Even BASE videos where jumpers try to stay relative to each other. I literally cover the phone with my palm or drag the scrollbar on computer to skip when I watch videos like this, because it's too painful to watch! A streamer at only 30 degrees to vertical??? (L/D = 0.6). What a torture! Is that FLYING?! Can't watch NOT FLYING. It's disgusting! Can't stand NOT FLYING. It's like, WTF?! "Why didn't you slow down?! - Well, I couldn't. I can't bend my legs..." I'm Yuri, and I have BLPS. Join the revolt against BMFS - Barely Moving Forward Syndrome!!! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

wrong assumption. no suit fly below the horizon What is your pitch angle when you fly for max L/D? Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

On all pictures of V-2 - except for some of Robi - the armwing is almost inflated! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio

Forget about stacks, they look too Maxim! If you can train your 70 horny men of questionable orientation to hold their hands and form a superlong flying wing, the vortices rolling from the wingtips will cancel each other and you essentially get a giant aspect ratio with L/D = 70:1! You'll be able to circle Lake Elsinore from sunrise to sunset catching thermals and land the whole formation without those stupid chutes. 420 foot wide connected formation with amazing glide ratio... now THAT'S a REAL world record! Android+Wear/iOS/Windows apps: L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP iOS only: L/D Magic Windows only: WS Studio