The Erwin is a great all-rounder slope glider that tracks like it's on rails. Think top-end sports model. The roll rate is on par with a quick 60 inch when the ailerons and flaps are coupled. The airframe slips through the air with ease, retaining it's energy very well. The Erwin can also crack a good race turn demonstrating very good grip. Some people even dynamic soar the Erwin although the manufacturer recommends keeping it at sport speeds; 200mph and under. The wing control surfaces are all bottomed hinged and top driven to provide slop free controls, the gap seals and wipers produce a nice whine on fast fly-bys.
Construction is primarily of twill weave carbon fabrics. The layup results in parts weights that are perfect for sloping. There are double wing spar joiners that do the heavy lifting. The kit is supplied with 3 wing joiners, 2 made of steel and one made of carbon. Run both steels on heavy days and replace one with the carbon on medium days or use just the single carbon joiner on light days to reduce the overall weight of the ship. There is a space between the two joiner tubes in the wing root that can be opened up and a additional ballast tube can be added there if the builder desires.
The hardware kit supplied with the Erwin contains; fuselage servo tray and associated bits, FG control horns, ball links and metal tubes for making the v-tail pushrods, carbon fiber servo covers and cap screws to fasten the v-tail. The Erwin also comes with wing bags. The kit is very complete and the craftsmanship is excellent.
The Erwin is an outstanding design and has been well proven over the years.
Peruse the build instructions here.
We recommend 10mm thick servos for the wings.
- Wing span [mm]: 2045
- Weight [g]: 1300-1600
- Wing loading [g/dm2 ]: 44,0-54,2
- Airfoil: HQW/1,5/7mod-gestrakt
- Aspect ratio: 13,54
- Controls: Ail, Flap, Ele, Rud