First I have no aurora 2 but an Aurora1-22 and an A15-18. I would choose ultra light if you want to hydrofoil or surf. Although you could go to 5 knots and below with the standard fabric the lighter will make it much easier, but if you don't plan to go in such light wind or surf then standard will be fine. If you like slow then well they will be very slow on a 50cm bar, I steer all my foils even down to 6m occasionally with the rear leaders, with the aurora 22 I need to do it a lot. North bars also have a Y and foils don't like that especially for low end, but you can use it still. Between Aurora1 and lotus, there is quite some difference, between A15 and lotus they are pretty similar. The a15 is more user friendly and the aurora a bit more performance. Quite a few have said the Aurora2 needs some adjustment out of the bag, not many have said that about the A15 but most have adjusted the A15 to get more performance. If you want easier get the A15, more performance Aurora2. I don't think there would be a huge difference between them.
I owned an Aurora v1 22m too (optimized bridles and standard cloth comparable to dlx from flysurfer), and a FS s4 10m lotus (similar design, far lighter comparable to light cloth from pansh), and recently a Pulsion 12m (limited AR like pansh a18, even lighter).
I am 60 kg with large foil wing, but transfering my personnal experience to +50 % of you weight, and assuming a18 behaviour is close to Concept'air Pulsion's, I would recommend you the A18 with no hesitation, light cloth if you can afford it which may do a big difference even under 7-8 knots :
- aurora 19m should rapidly be too powered, with a depower far less efficient than a LEI. I was overpowered as soon as foiling with a speed 15m, not comfortable knowing that such kites are hard to drive when un-powered.
- aurora 19m will be very long to turn, hence difficult to manage lulls under 6 knots
- transitions in hydrofoil will be very technical with aurora due to slow turning
- for the waterstart, a18 will be more agile which will largelly compensated the difference of size and projected area (aurora is more flat on top of the +1m2)
-a18 much more fun for surf
- more user feedback on a18.
- a18 certainly more userfriendly for medium skills in foilkites.
In my opinion in your case (hydrofoil and surf), the main (and only) advantage of the aurora would be for racers : the speed when pointing upwind and downwind at narrow angle. But in the detriment of a transverse "standard" ride where you will not be able to ride as soon as the wind speed increase (due to overpower). Aurora should stay at the zenith with a bit less wind, but a18 should win when working both kites .
So, A18 definitelly to me ...with light cloth which will save you some swim back to shore and easier kite work when underpowered and for waterstarts.
I agree with what Regis-de-giens wrote. I own a Aurora v1 19m, Speed2 19m, A15 18m and at 90kg they all get me out on light wind sessions. If you want to go faster the higher aspect ratio Aurora and Speed kites do better. I'm enjoying the A15 more now, it's fast enough and I'm more agile on the board. I like the A15 better on a pulley bar. The light fabric is probably better performance but the trade may be less durability/life.
Macisback wrote:Where can i still get a pulley bar?
My first one for the Aurora 22m was the original bar from an old LEI Liquid force 16m model Assault ; it is sometimes called "turbo bar" if you look for a second hand. Then for a friend who bought also a Aurora 19m, I did it myself for him, indeed not complicated : 1 pulleys on each extremity of the bar, longer rear pre-lines than will go through the pulley and then attached to the front line starts above the trim (to double the trim as well). After first trials, if bar pressure is too high for jumps, you can also try to put a not along the rear lines to lock the pulley at a certain bar stroke ( which will limit the turbo effect at maximum pull-in stroke)