Showing posts with label flight characteristics. Show all posts
Showing posts with label flight characteristics. Show all posts

Thursday, July 22, 2010

Gradient XC3 - Impressions after some XC Competition Flying

For those who are watching this blog for info on my experiences with the Gradient Avax XC3, I can say this - It is one sweet wing.  My hope was that the wing would retain the handling of the XC2 while displaying increased performance, and the guys at Gradient pulled this off magnificently.  

The wing feels and responds to inputs much like the XC2; so much so that I felt very comfortable close to the terrain and flying strong, rough thermals over the flats of Eastern Washington, on my first flights of the Chelan PWC.  The trailing edge is a bit firmer than the XC2 without that 'stiff-brake' feeling exhibited by the Gin and Niviuk EN-D wings.  The brake travel is about the same as the XC2 but I find the XC3 to have less spin tendency than even the XC2.  I still haven't reached the spin point while flying the wing in very snotty tight thermals.  The wing is very good at communicating the location of the 'bubble' core of the thermal.  The wing is very communicative while not being jittery or twitchy.  The ride is pure Gradient - not stiff and rough - more cushioned but firm. . .

There have been reserve tosses every day in Chelan but my wing has been purring along with nary a tuck.  I was able to get the wing to frontal while flying at 3/4 bar on the practice day (my first real flight on the wing) and was able to save it by reducing the bar and a brief, sharp, tug on the "C" risers to keep the tips back.  The frontal promptly popped out and away we flew, on heading and on speed again.  I love this wing -

I'll explore the corners of the envelope more when I'm in better air & less gaggle traffic -
The build of the wing is still very light but durable.  The ribs at the leading edge are reinforced with partial mylar laminations with plastic 'strimmer lines' about 3/4" from the leading edge of the wing, running from the top of the nose of the airfoil along the bottom edge to 5" or so beyond the "A" attachment points.  There are 'gibus arches' incorporated in the ribs along the "B" attachment points.

On the third task of the PWC the conditions at launch were very light and fickle.  The launch queue was moving very slowly as many were having fits coaxing their 2 and 3-liners into the crossed light winds.  I laid out and brought the wing up easily, built it on the way up and got off the hill easily - Much like the XC2 in it's easy ground handling.  I used "As and Cs" alot on the XC2 but am using the brakes and As on this wing because it only has the 3-lines.

Speed-bar is fully usable and very effective.  I can feel that beyond 3/4 bar the glide is affected quite a bit, but 3/4 or less is very effective in keeping up with comp ships.  I had many transitions where I was gliding with comp ships and getting to lift sources at the same altitude and time as they.  Flying this wing gives me the mind-set that I'm on a competitive wing.  I don't have any direct comparisons against the few GTOs and Omega 8s, here in Chelan, but the Boom and R-10 pilots flying with me are indicating that I'm getting excellent transitions with them.  Climbs are also very good.  The sink rate has been improved from the XC2 and the handling is good enough that it's possible to use the rough lift more effectively than the less maneuverable ships. 

Landing is simple - enough said?

These are my early impressions, but I think that there is little lurking for me to discover.  I've been flying in rough conditions for 5 days now and am very happy with this wing.  Highly recommended for pilots with the experience to fly a high-end EN-D wing, especially recommend for pilots who like the gradient handling and/or have experience on the XC2.

Tim 



Wednesday, July 14, 2010

Gradient XC3 - First Impressions


I received my new Gradien Avax XC3 yesterday and kited it for an hour.  Today I flew 2 sled rides off a 700' hike-up to check the trim and handling of the wing, before I head out tomorrow to fly in the Chelan PWC.

Here are a few of my initial impressions.  I'm sure I'll have more meaningful info next week, after climbing in 8 meter/sec thermals and pushing the bar all day.  But for those of you who like the minutia, and are looking for any info about this new wing, here's a bit -
My Background: 
Most Recent Wings: Gradient Avax XC2-26 (220 hrs)Gradient Aspen2-28 (120 hrs) – Airwave Sport 2 (200 hrs) – Gin Bandit (40 hrs) – Edel Confidence (80 hrs)

The XC-3 is a 28 meter wing (100k-115k), standard blue color.  The bottom of the wing is all white with a small Gradient (smileyface) logo at the centerline at the leading edge and trailing edge of the wing.  The blue is a lighter, baby blue, than the blue used on my previous Gradient wings (Aspen 2 and Avax XC2). I chose the 28 since I'm flying a heavier harness now & the XC3 is a meter smaller than it's XC2 counterpart.

The lines are thin, unsheathed Edelrid Aramid - 1.2mm to .5mm in a 3-riser configuration which reduces line length by about 20%.

The risers are thin but robust, with “snap” type brake handle stowage and nice swivels on the brake handles. 
 
The speed system on the XC3 is a 2-pulley system and is easier to use than the one-pulley XC2 system.  I really didn't find the one-pulley to be a problem, but the XC3 will be much easier to modulate and hold speed for those long transitions.


Workmanship is excellent.  The wing ribs are thin material with a mylar type of reinforcement along the lower surface.  A 'strimmer-line' reinforcement runs along the lower surface beyond the "A" line attachment points.

The Aspect Ratio of 6.8 and 3-line configuration made the wing a different animal while ground handling, but using A's and brakes was very effective in controlling the wing without the Aspen like launch into the air.  The tips seem a bit more 'sticky' on the XC3 than they were on the XC2.  I'll be watching this more next week, but in the small assymetrics I pulled today, the tips needed patient pumps to come out.  Control was very good during the recovery.

Launch is very Avax XC2-like. The wing comes up easily and can be stopped accurately with brakes or rear-risers. Directional control is good. No bad habits.  



Landing was very straightforward.  Good control and no problem deep in the brakes during the swing-through flare.


Like I said, I will (hopefully) get 15-20 hours on this wing in race conditions, next week.  I'll have much more meaningful info then.


For my complete bit of feedback on flying the XC3 go HERE.
Tim