If you have additional information (ex: specificity of piloting, various characteristics...) on the hang glider Firefly by UP Ultralight Products, you can supplement his card by adding your comment or write to us :
I have the prototype of this model. the sail is rather heavy and all black. If you need any measurements, I can set it up to get them. It flew well though I haven't set it up in many years.
Le corbeau des montagne imaginé par UP.
Rich Pfeiffer told me in 1982 that he flew the first prototype of the Firefly on his first hang gliding flight. He said it had a tendency to spin when stalled.
Just put down my firefly 220 with rainbow sail. Sad day. Flew it for 45 minutes one day by catching thermals off a rock face at High Rock, Penn-Mar Pennsylvania. I found it to be very stable in most conditions