Cart dynamics
Hell, just drive to the Owens whenever you feel like getting a bit o' airtime, right Rick?Christopher LeFay - 2016/02/08 20:16:23 UTC
Houston, Eastern Redneckistan, Texas
My home site was in a valley; our LZ was surrounded by forest- as a consequence, I abjured towing. Now, transplanted to the flat lands of Texas, towing is the flying necessity.
And you've already got the best equipment possible within the confines of human engineering so education is all that's left to work on.There's still much that sucks about towing- mostly those first few tense seconds -stuff I need to do my best to guard against through education.
Jesus H. Christ. How complicated can you possibly make an issue like this?Here I'd like to specifically address all-things-cart related: cart adjusted to a parlous height; getting stuck on the cart; coming off askew; dangle angle and displacement. Mostly we talk about these things here when deconstructing an accident- otherwise, specific considerations oft go unsaid.
http://www.hanggliding.org/viewtopic.php?t=22540All too often our best practices amount to what we have gotten away with or are most comfortable with;
LMFP release dysfunction
Diev Hart - 2011/07/14 17:19:12 UTC
I have had issues with them releasing under load. So I don't try to release it under a lot of load now.
I reckon there's value in contesting views on the best way to launch from a cart. You'll likely have insight I wouldn't even know to ask about- so have at it -but I'll start with a few questions I know enough to ask.
Christopher LeFay - Houston, Texas - 79849 - H4 - 2007/06/24 - Daniel Zink - FL AWCL CL FSL RLF TUR XC
And ignore all the ACTUAL, LETHAL, and DELIBERATE problems we have in aerotowing.What dangle-angle do you prefer- head relative to bar -and why?
Do you lift the cart a bit before releasing it? If not, why not?
What is the ideal cart height adjustment- slightly higher nose angle than trim speed?
While on cart, is weight shift for roll necessary, or is a good hold on the cart sufficient to keep the wings level?
Do certain sized control frames pose any special complication on the cart?
Do you allow yourself to be pulled through to normal flying position for the speed, or do you resist being pulled through at all?
Basic stuff-but your thoughts on those or any other consideration that comes to mind will be appreciated.
If he's got an AT rating shouldn't he also be able to tell everybody what weak link value he should be using?Mark Moore - 2016/02/08 20:46:15 UTC
Houston
I hate to be that guy...but, honestly, it you have an aerotow rating, you should know the answers to every question you just asked.
http://ozreport.com/forum/viewtopic.php?t=24846If you don't, go to cowboy up in Wharton. Bart and Tiki cover all of your questions in their instruction.
Is this a joke ?
Bart Weghorst - 2011/08/28 20:29:27 UTC
Now I don't give a shit about breaking strength anymore. I really don't care what the numbers are. I just want my weaklink to break every once in a while.
Yeah Mark. Those assholes probably CAN tell him how to put a glider on a cart and launch.Mark Moore III - Texas - 87409 - H4 - 2011/09/10 - Joel Froehlich - AT FL LGO PL TAT TPL CL FSL RLF TUR XC - ADV INST, TAND INST
But weak links for gliders are all EXACTLY THE SAME.rregier - 2016/02/08 20:57:37 UTC
Kitchener
There are nuances. Gliders differ.
Knock yourselves out. As long as there's no actual substance to your discussion there won't be any problems.The question of cart geometry and adjustment for different gliders is worth talking about.
Al Haig.Christopher LeFay - 2016/02/08 21:11:59 UTC
I do know *an* answer to each- but am looking to fill out understanding with diverse insight. Moreover, at the same local you suggested, we see some variation, some great. I do not intend to limit consideration to what I know or that which I know I don't know (thank you Karl Rove).
OPINIONS? You're in Opinion Nirvana over there.Bouyo - 2016/02/08 21:50:20 UTC
I recently went through my AT rating and received the very helpful advice of keeping your shoulders centered on the control bar and making roll inputs leading with the feet, instead of the more customary full-body weight shift. If you move your shoulders to either side of the control frame you're changing your tow point in relation to the tug which is counter-productive to keeping in-step with the tug. It helped my control inputs a lot while on tow. - Does anyone else have opinions about that advice?
Idiot.I'm using a three-point tow by the way.
He'll need it after the opinions start rolling in.Good luck with your flat land flying.
Suck my dick, Nate.Nate Wreyford - 2016/02/08 22:32:30 UTC
With such an awesome resource like Bart and Tiki (in addition to other instructors and advanced pilots in Wharton), why go to some place with so much noise and so little signal when looking for answers?
Bullshit. If they weren't perfect easily reachable releases and standard aerotow weak links would be really dangerous.Christopher LeFay - 2016/02/08 23:05:29 UTC
There are plenty of good reasons. No one, no mater how good, is perfect.
Yeah?Some folks see some things, some others- and not every instructor can reach every pilot;
http://ozreport.com/forum/viewtopic.php?t=24846
Is this a joke ?
What's it matter?Jim Rooney - 2011/08/31 09:25:57 UTC
So please, find me something... that you didn't make... that I can go out and buy from a store... that's rated and quality controlled... that fits your desire for a "non one size fits all" model, and *maybe* we can talk.
But you see... I'm the guy you've got to convince.
(or whoever your tug pilot may be... but we all tend to have a similar opinion about this)
When they're......not every pilot can hear what every instructor is saying.
...being visited in the hospital they can.Jim Rooney - 2011/08/31 09:25:57 UTC
Only later, when we're visiting them in the hospital can they begin to hear what we've told them all along.
I wonder how I managed to survive all those years just making the glider go left and right by feel alone.Even more important is the sort of unanticipated insight provided by each student- take Bouyo's post as a GREAT example.
Welcome to Nate.While I appreciate your sentiment, Nate, you've added more to the noise you lamented!
If you have anything to offer Bouyo in response to his question, I'm sure we'd both appreciate it. Less meta, more discussion, thanks.
Moronic Hewett based crap.Michael Farren - 2016/02/09 05:25:12 UTC
South Bunbury Western Australia
Christopher, this link should take you to the Hang Gliding Federation Australia (HGFA) towing manual. Page 15 contains a brief outline on the key requirements of the cart (tow trolley) and angle of attack setup for the wing prior to launch.
http://www.hgfa.asn.au/resources/Tow%20Manual%20v5.4.1.pdf