So what the swizzle is a 'luftkappe', and why the hell would I want one?!
Be warned..what follows is likely to be geeky tech speak....!
Well, apparently it's a way of making your Rockshoc Pike/Yari etc feel more supple in the early stroke, but firm out to prevent bottoming out in the deep stroke ("What??!! Oh..it's a bike thing..I'm outta here..")
You can add tokens to the Pikes to reduce the +ve chamber air volume, thus increasing the ramp up.
The Luftkappe differs as it fits in place of the standard piston, but the 'dome' element of it increases the effective -ve chamber volume, whilst reducing the +ve chamber volume.
Wha? You may ask; well, the -ve chamber reduces the force needed to 'get the fork moving'. Thus, a bigger volume -ve chamber should allow the fork to 'start moving' a bit more easily..making it like a coil (but without the coil weight).
Does it do that...Well....I don't know as I've jsut finished fitting the Lufthansa and it's now bed time.
However, in the next few days I'll be sure to ride the bike and let you know.. However, here's a brief guide of how easy it was to fit...