D1 specifications

Wingspan:                                                            4,5 m
Length with Subaru engine:                              3,3 m
Wing area:                                                           10 m2

Empty weight prototype:                                  210 kg
Max take-off weight:                                          340 kg

Cruise speed:                                                      220 km/h
Vne:                                                                      270 km/h
Stallspeed:                                                             85 km/h

Loadfactor:                                                           +/- 6g

Tank content:                                                       60 ltrs

Engine on prototype Subaru EA 71, 1600 cc, 50 HP in direct drive, liquid cooled
uses 13 l/hr mogas at cruisespeed

Propeller on prototype: 138×110 cm wood, fixed pitch

Construction: all metal, mainstructure aluminum 6061 or 2024

Landing gear: monowheel type, retractable and steering mainwheel with rubber compression spring
tailwheel with shock cord suspension
tipwheels with metal torsion spring suspension


Suitable engines:

The prototype is fitted with a 1600 cc Subaru EA 71 engine, propeller directly fitted to the crankshaft. The engine is lightened, all redundant aluminum is milled from the housing and the steel oilpan is replaced by an aluminum one.
The cooler is placed in the starboard wing.

Other engines that will do the job are the 1800 cc VW and the 80 HP Jabiru although this one would not fit in as nicely as the other ones.

You can also install a 2 stroke like the Rotax 582 but the fuel consumption will be more.