KrisFlyZ

Hope you read the link and all material presented on the NASA website. Specifically the following link. http://www.grc.nasa.gov/WWW/K-12/airplane/bernnew.html I posted that because it was cool to visualize the flow turning and feel the force. Maybe even point out the importance of Camber. Kris.

Actually you are not flying in most flocks either. You are just falling with more style coz you got more material to in style with colorful suits . They are loads of fun though. Most times its more fun than flying anyway. Kris.

Hold a spoon lightly so that it hangs nown naturally and can move easily like a pendulum if a force were applied to it. Now place this close to a tap from which water is flowing at a decent rate..move your hand so that the convex (or bottom) part of the spoon barely touches the water. See what happens. The spoon is 'sucked'into the water stream and the water flow changing direction and following the trailing edge of the spoon. You can feel this force on your fingers. Lift from flow turning. http://www.grc.nasa.gov/WWW/K-12/airplane/right2.html It was pretty cool to visualize the flow turning and actually feel the force. On the flip side, take a knife or ruler and stick it under the flow at an angle see what happens and the pattern the water bouncing from the flat surface follows. Repeat the experiment with the concave side of the spoon facing the water flow. Cool huh! Kris.

This is So Sad. RIP Eddie. Kris.

Is that why you are selling your S6? I heard at the DZ that a new product was going to be released soon by BM. Kris.

It does not say if the thing has WAAS/EGNOS capability. It costs around £80 for a bluetooth GPS reciever(no recording) with SiRF III and WAAS/EGNOS. Until Galileo is operational that seems to be the best data logging option. I was thinking a GPSMAP 60 or 76 CSX with an external antenna mounted on the helmet would be the most accurate and economical option. This seems like a much cheaper alternative. Kris.

Thanks. That story brought back fond memories of the mountain and Arco. Kris.

I have a phantom and that's the only suit I have until the new one arrives. Then I'll sell this one and own just one suit. The days of having too many suits are so yesterday . Kris.

Nice one dude!! Give me a buzz if you are in London before 30 Dec. Kris.

When you get there have people with a different body types fly with your system and gather data so that you can have data from different sample. I am trying to come to Zhills around that time as well see how that goes. Kris.

If most people are using Garmin GPS units...uploading to Motionbased.com(free...limits number of logs you can store on the site if its a free account) is one idea. Or if the computer has a GPS mapping product like Mapsource everyone can download to the same machine and compare data. Kris.

Don't you think this poll is pretty much the same thing? Kris.

You can compare materials and construction and things like that but comparision of suit performance among different pilots is an exercise in the masturbation of ones ego. Read this post by Dwain. Here is an example he gave in that post The obvious extention to this is how is it fair to compare flight data between differently built people. Because the 'wing' dimensions and weight may be entirely different. How much area(in a truly custom wingsuit) increase one can get by wearing a wingsuit depends on their physical characteristics. Two people of the exact same height and weight (and total width and length and thickness if you want to be really specific) and different leg and torso lengths will have a different area. Making a performance comparision is pretty pointless. As humans we will always try to compare because that's the natural human thing to do. Kris.

Why? Everyone thinks theirs is better than everyone elses so we might as well have these discussions until we beat them to death....or they are fun enough anyway..... kris.

For flying from the airplane...I would choose a Phantom over the V2 anyday and twice on sunday . kris. P.S: This is the best thread ever...

Those are big words coming from the person who posted multiple times about his problems filling up his wingsuit in the crotch area kris? http://dropzone.com/cgi-bin/forum/gforum.cgi?do=post_attachment;postatt_id=72250; Hey be thankful my shlong did not fill up that suit. If it did all yall's(how do you spell yall?) penis would be waaay smaller than mine. . Kris.

man im glad i have a girl friend Looking at your Avitar, you have the loosest condom I've ever seen! t Are you saying his penis is too small? Kris.

My best flights to date have been in the SF.3. In theory the Vampires are better. Kris.

Your post confuses AoA and pitch. In the last sentence do you mean pitch or AoA? Because headdown and flat from start refer to pitch. What equations did you use and what ax and ay did you use? Because these are non zero. Are you talking about 45 degree AoA? Because at zero velocity 45 degree AoA = what pitch and what L/D? The graphs are more than a bit off in regards to real world observations. Take a look at Terje's exit in this movie. The flight starts way before 200'(if that of fall) and I cannot tell if the AoA is 45 degrees. By the time a wingsuit flyer falls 300m, well over 1:1 GR can be reached. You have seen James's bridge day video? Depending on opening altitude, that final GR is probably over 1:1 at that point and the altitude lost is not even 600'? Kris.

OMFG you flying 7 to 1 Kris. P.S: Did you already finish your trip to Z hills?

I knew that mentioning suit names was a mistake. Anyway... Angle of Attack and Pitch. ========================== http://www.aerospaceweb.org/question/aerodynamics/q0165.shtml http://en.wikipedia.org/wiki/Angle_of_attack It seems like AoA can never be negative for a wingsuit flight(pitch can be but not AoA). A negetive AoA would mean that the airstream is hitting the top surface of the wing. This would mean that lift is negative. Playing with the FoilSim applet on the NASA aerodynamics website shows this. Camber ======= http://en.wikipedia.org/wiki/Camber_%28aerodynamics%29 This is a good thing. We can create Camber by pressing the legs down and sucking the gut(kinda hard and needs a lot of ab strength...shoulders on level with feet as some of the suit nmanuals describe it) and(or) by bending and rolling the shoulders but keeping the legs straight...this seems to reflect the way most real world wings are...the bulge in the wing shape is nearer the leading edge. Angle of Incidence ================== http://en.wikipedia.org/wiki/Angle_of_incidence On some suits this is not zero. To the best of my recollection, the manufacturers reason for this was that it aids in reducing the angle of attack. Kris. Edited to make clicky's

Not comparing the different planforms Glen. But as a side note. There should be no doubts that the V suits have larger area then the S-3 or the S6 in addition to having a whole lot less drag and a better wing distribution. See Chucks V1 vs S6 comparision. One of Robi's own articles on aerodynamics goes on for three paragraphs about the problems with increasing area of the wingsuits. Increase in area is a good thing but not just anywhere. One striking feature of the V series arm wings is the concavity from wingtip gripper to body attachment point. See the pic of my V2(previously owned). Try holding a flat object under a tap and see where most of the water goes, then hold a spoon under the water and see what happens. Its the simple things in life

Granted just making a big suit will not make it the best gliding suit..... But bigger is better . The best suit(V2) you make is bigger than any other suits that you make(Prodigy, Phantom). Now slower........ Kris.

This is a good site as well

No Dude...the one people are talking about is not the original suit of death(as bill(sullyflyer) called it at Z-flock 1). This is a new product. Kris.