Does VG affect sink rate?
As opposed to a deliberate stall. Sometimes when things are going south you wanna deliberately stall the glider 'cause stalls are totally benign and mere inconveniences. ALWAYS the better option to trying to fix a bad thing because you don't wanna start over. Why else would we all be using Davis Links to convert climbs with anything over minimal thrust into stalls by predetermination?Robert Kesselring - 2015/09/03 10:25:52 UTC
Lower stall speed and better glide ratio sound like exactly what I'd want for a flat slope launch to get me off the ground sooner and further away from it sooner. I wouldn't want to launch with full VG because that would be a very bad time for an accidental stall.
What are your thoughts on using 1/4 to 1/2 VG for flat slope launches?
Tormod Helgesen - 2015/09/03 10:55:54 UTC
I always use 1/4-1/2 for launch. The wing lifts sooner and pitch pressure is less. Gets you off earlier with less tendency to pop the nose.
Show me some videos of relevant problematic dolly and platform tow launches. Show me slow climb-outs, nose pops, stalls - full or tip, worries about VG settings and wind shifts, shallower slopes.NMERider - 2015/09/03 14:07:51 UTC
I use 1/4 VG religiously for flat slope launches. It's critical to avoid stalling a tip and roll authority is also of paramount importance. If you can't get safely airborne in this configuration then you may want to think about not launching until conditions permit a safe takeoff with 1/4 VG. Different gliders may vary with the affect of different VG settings. I use this on my Sport 2 155 and T2C 144.
For light air shallow slope foot launches we are operating at the EDGE of our capabilities. Trip, stumble, failure to maintain proper pitch with glider level, air shifting to cross or tail - we can be instantly FUCKED. Full available power is marginal as all hell - gets us to two or three miles per hour over stall speed then we lift off and pray everything keeps going right or the slope starts dropping away fast.
Stationary winch, truck, boat, aero... We've got POWER...
10-03323
http://farm3.staticflickr.com/2928/14397296584_1d0e5e389b_o.png
...coming outta our ASSES.
Course just about all you hear from the hang gliding establishment is how much more dangerous than slope launching towing is due to all the "complexity" of the latter.
And the towing industry can't breathe a word of this MASSIVE selling point 'cause since the beginning of time all these total fucking assholes have been...
Jerry Forburger - 1990/10
High line tensions reduce the pilot's ability to control the glider and we all know that the killer "lockout" is caused by high towline tension.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=2467Towing Aloft - 1998/01
A weak link is the focal point of a safe towing system.
Pro Tip: Always thank the tug pilot for intentionally releasing you, even if you feel you could have ridden it out. He should be given a vote of confidence that he made a good decision in the interest of your safety.
weak links
http://www.youtube.com/watch?v=JByP6Crvrx4Jim Rooney - 2007/08/01
Whatever's going on back there, I can fix it by giving you the rope.
It's more of this crappy argument that being on tow is somehow safer than being off tow.
Tandem Hang Gliding - Passenger Hook-in and safety procedures for winch-tow
... painting all this power they have at their disposal as the enemy and their magic fishing line - which...Mike Robertson - 2012/07/12
And we take off with this... We call it a weak link - many people would call it a fuse... And that fuse is all we need to tow us up. And if anything ever happened that got us over-tensioned that would just break - and we'd be free flying, which is just what we like.
http://www.chgpa.org/forums/viewtopic.php?f=2&t=3661
Flying the 914 Dragonfly
...prevents transmission of all but a small percentage of said power - and ultra safe drivers poised to fix whatever's going on back there by giving us the rope as our only hopes for more than extremely short term survival.Jim Rooney - 2008/12/06 20:01:49 UTC
You will only ever need full throttle for the first fifty feet of a tandem tow. Don't ever pull a solo at full throttle... they will not be able to climb with you. You can tow them at 28 mph and you'll still leave them in the dust... they just won't be able to climb with you... weaklinks will go left and right.
In slope launching you fix just about anything that's going on by pouring on more power and speed, in tow launching you fix whatever's going on by abruptly chopping it yourself or having it abruptly chopped for you by a stupid piece of fishing line or an even stupider safe driver.
Go to an aerotow operation with 914 Dragonflies that's brought in low powered / climb rate tugs to help out with a fly-in or competition and see how many people are fighting to get in line behind the 35 horsepower stuff. That percentage will match up pretty good with the people asking the meet heads if it's OK to use safer weak links.
Talk to some of my old asshole buddies from this neck of the woods. Ask them when they're more scared - at the top of the Woodstock slot with five miles per hour coming straight into the slope or on the cart at Ridgely with a five mile per hour switchy tail.
These motherfuckers have painted themselves into a corner from which they'll NEVER be able to extricate themselves. They'll never be able to use their most obvious and indisputable selling point to their advantage without having to totally refute all the crap they've been pouring down our throats for decades and thereby totally destroying whatever vestiges of credibility they're still trying to perpetrate.