Pike Perfect ET (Extended tips)
To make something which you call „perfect“ even better seems to be a very hard task. But for the season of 2009 we wanted to offer an add-on to our successful Pike perfect. It didn´t need ExtraTerrestrial help but some time here on earth to calculate about the pros and cons for an “Extended Tip”-Version of our Pike perfect. Finally with the beginning of the 2009 flying season we are able to offer the Pike perfect ET to our customers.
Here are some lines from the designer Philip Kolb about the new wing tips and their development:
There is a kind of idiom heard
very often in soaring: “Bigger is better!”
The non linear airfoil
transition from the tip’s root chord (airfoil PK-91B) to the tip (airfoil
PK-995) was designed and developed according to the method described in the
Pike perfect development article. For this new transition the airfoils were
designed for their local Re*sqrtCl range to offer more equal Clmax values along
the span and less drag in the higher lift range from Cl = 0.5 upward.
Some pictures from first flights in Cyprus 6-8.march: