Sounds like you're having fun Iain! You were on the right track lengthening the rear lines, you might need to lengthen the "pigtail" at the kite so you can use the same bar on both kites. You should find all the information you need here
www.kite-fantastic.co.uk/articles/mx5alan/peter-lynn-arc-setup-faq.html
If you can't make sense of that then feel free to ask again, better safe than sorry!

The pigtail is the leader line attached to the kite.

schmik

Despite the problem with the lines, the ARC630 is a fast kite, much faster than the 11m LEI I used at kite school. Not sure what the wind speed was - but doing figure 8's would see me ploughing deep divots 50m down the beach in a few seconds, in the soft sand I way able to cut nice big arcs left and right and the occasional jump which my kids recon was at least my height and at least 15m long. Next time I'll wear shoes, I just about sanded all the skin off my feet.

quote:

---

and the occasional jump which my kids recon was at least my height and at least 15m long.

---

Try getting more height, and less length on your land jumps. You will definatly break a bone or even better paralyse yourself.
Good Luck
Oh and make sure there are lots of people around that you can plow into

A 630 is only 6m sq .

I'm flying a S1120 ( Tobes the chicken loop line snapped yesterday and I had another swim in, the sharks in Botany bay must be well fed) and however on the 1120 the rear lines are basically slack when the bar is out, the kite would probably fly without any rears (but you wouldnt be able to turn). My rear lines actually bow in the wind when the bar is out, they are not tight like an LEI. If the rears are too short then when you pull the bar in the rear act like breaks and then kite will fly backwards or downwards, You can try to use the depower to tweek this if your having issues on the day, this would make the fly lines shorter and hence act to lenghten the rears.

So with the S1120 my setup is such that with the bar in the kite still flyies forward but only just. That is pretty much full power no speed, when the bar is out, the rears are comparitively slack and the kite flyes fast.

Cleat and pully setup works fine, just watch that when you have the line pulled in at the cleat, that the tail doesnt wrap itself around the leash line, if it does your quick release is cactus, I use a clip to stop it twisting around the leash and chickloop rope.

Also check the lengths of all your lines, they might not be equal. From memory the 630 needs about 230mm of slack in the rear lines, you make this with extra rope at the bar attachment or the kite, its easier at the bar IMO. Check the web site that tobes recommended.

make sure the QR works.

A.

To answer the original question, the rear lines are far too short. You need to lengthen them somehow. The easy way, and to keep the same bar, is to lengthen the rear pigtails (the strings between kite and bar/lines).

I've had two setup's for my old 630. One was a bar just for the 630, very long rear lines and short pigtail attachments. It was setup with a very long chicken loop and a very long adjustment strap. You can launch the 630 directly down wind, but make sure you know what you are doing, it CAN bite you.

The second setup was a "standard" type bar setup with a much shorter chicken loop and much shorter adjuster strap. I had to put very long pigtails on the kite so that the rear lines were long enough and I had it very well tuned to the SHORT range of sheeting adjustment I think the 630 has.

I would suggest the latter setup (less likely someone else will attach a standard bar to the kite and have absolutely no control of the kite). You want about 10cm chicken loop travel, "normal" length adjuster travel and an extra 50cm+ in pigtail length. If you know the kite you will know when the length is good. Don't go TOO long, you lose all steering, this is BAD. Test this in like 5 knots. You should always side launch.

This kite is great fun in 25+ knots. For me 30+ on a number of occasions and very comfortably. If you keep jumping on the beach you are going to hurt yourself or, worse, someone else.

Iain-b
the front lines on the s arcs : 630 shuld be 200mm longer than the
rear lines , with the power strap/pulley fully sheeted in.
venoms and g arcs run on lines at equal length.
try lengthening front pigtails 200mm on your 630.
this should allow you to fully power and depower with your power strap/
pulley to suit conditions.sheeting in on bar is still needed to turn
kite quickly,then back off to allow kite to accelerate in new direction.
if kite stalls/stops or start going backwards power strap or bar sheeted
in to much. tip:to get kite moving if stalled , grab and pull front lines. good luck

I stand corrected,tobes is right . lengthen rear pigtails.
5 year of flying p/L kites can do that to you.

The buggy guys are totally nuts, I've seen them doing about 70kph in 40-50knt winds on Muissenberg beach. I've even seen them racing each other around markers on the beach.