dterrick 0 #1 January 9, 2003 Going to the DZ Saturday for winter jumps. Recent luck suggests we'll be sitting a bunch. I'm particularily interested in the length of the steering lines as I suspect they may be short. Suggestions? Anyone have a Rigger's manual handy? Dave Life is very short and there's no time for fussing and fighting my friend (Lennon/McCartney) Quote Share this post Link to post Share on other sites
rigging65 0 #2 January 10, 2003 Contact Beezy Shaw at Precision, he'll be more than happy to help you out. (423) 949-4688 or [email protected] "...and once you had tasted flight, you will walk the earth with your eyes turned skyward. For there you have been, and there you long to return..." Quote Share this post Link to post Share on other sites
riggerrob 558 #3 January 11, 2003 Raven II line trim specs Spectra Base NCA 324.8 NCA to NCB 8.6 NCA to C 27.7 NCA to D 50.6 NCA to T* 22.0 Base A 326.1 A to B 9.3 A to C 26.3 A to D 48.9 A to T 21.5 BL to Tog 65.8 These numbers were transcribed from a FAX sent by Precision Aerodynamics 01/30/1996 11:53 It says Inches converted from metric. * With deployment brakes set, assuming standard riser configuration Quote Share this post Link to post Share on other sites
dterrick 0 #4 January 11, 2003 Thanks for the tip - Beezy had the numbers to me by Friday morning!! It's too cold to jump, will be measuring soon. Dave Life is very short and there's no time for fussing and fighting my friend (Lennon/McCartney) Quote Share this post Link to post Share on other sites
dterrick 0 #5 January 12, 2003 Hi again RiggerRob! Took the PA specs and did some measurin'. First off, I now understand why 'simple' rigging services cost $'s because I easily blew an evening measuring and then calculating (and that was with my computer's help with the math!!). I bet a 'professional rigger' would have stopped at about line 3 because the results wee not great. The whole A set hsad shrunk 8 cm +/- except the one line that had been replaced which was only 2 cm short! the R4 A line was 12 cm short !! The R2C and R2D were also noticibly shorter than the surrounding lines. The D lines were all over the place (-2 to -8). The tail with brakes set was HIGH on he LHS (+3) and LOW on the RHS (-6). There was a 5 cm difference (-12 and -7) in the toggle settings. Worse yet it appears that the LS was the one that was shortened and that's the high side of the canopy already. Can you say "warped" ?!?. 'splains a few things about its ground-hungriness (trim change), sluggish performance (warped) and difficult to impossible flare (well, it IS old... but apparently there's more). Seems that a day in my basement has been time well spent. Now I KNOW I need a new canopy - I just can't see changing 5-8 lines so they are "equally" worn out and a new lineset on old F-111 just doesn't seem like money well spent. Oh well, it'll make a cool car cover Dave Life is very short and there's no time for fussing and fighting my friend (Lennon/McCartney) Quote Share this post Link to post Share on other sites
riggerrob 558 #6 January 13, 2003 Sorry about that dude. I would have sent you metric specs if you had asked. Precision is one of the few companies that publish both english and metric trim charts. Fortunately I have both types of chart and both types of measuring tapes. Hint, the quickest way to measure the health of a lien set is to compare the A lines. Start by tying the risers together and applying 10 or 20 pounds of tension (5 or 10 kg for the metric dudes). compare the A lines. If they are symmetrical, good. Now measure the difference between the longest and shortest A lines. When the difference approaches 3 inches, I recommend replacing all the lines. Hint, by the time you start replacing the fourth line, it becomes as expensive to replace all the lines. I agree with you that it is not cost-effeftive to replace entire line sets on old F-111 canopies. Quote Share this post Link to post Share on other sites
