Main Menu

Jodel D.18

 

jodeld18
D.18


The success of the DC1 lead M. Delemontez to make a thorough revision, and the first D-18 took to the air in the spring of 1984. At first glance looking quite similar to the DC1, there is hardly a single point where Delemontez has not changed something. The prototype has a slightly bigger span than the DC1.


An aircraft entirely of wooden construc-tion and built from plans. No kit is available although some sub assemblies can be for control surfaces and undercarriage and perspex canopy can be bought. Douglas Fir is a major material but Australian Hoop Pine has been found very satisfactory.


As a two seater the D18 has relevance as a local tourer. The one piece cantilever wing incorporates a sturdy box spar, wooden ribs and ply covered leading edge with dacron covering on the remainder. Flaps are optional. The fuselage is of rectangular cross section with a rounded top decking and made up of wooden longerons, bulkheads, plywood rear formers and is plywood covered. The perspex canopy is attached to a steel tube frame and hinged at the rear. The completed aircraft with some judicious construction will fit into the microlight category and becomes a very cost effective construction project.

 

Jodel-D18-2

 

As the Ultralight specifications changed during the 1990's, many builders realised that it should be possible to register a D18 as an U/L with only minor modifications. SAB also seems to have seen this as a new marketing niche. In late 1999 a brochure emerged telling about these recent Jodel developments.

The new variants are called D185 and D195, and differ from their D18 and D19 forerunners by having:
- an 8 cm wider, more comfortable fuselage.
- the hood extended towards the rear, opening by sliding the rear part rearwards.
- flap of increased area (which means increasing wing area as well) to lower the stall speed. The increase in area is simply done by stretching the trailing edge of the flap rearwards by 100mm, leaving the wing unchanged. The flap is also extended all the way to the root rib.
- hydraulic springs (oléopneumatique) in the undercarriage.
- gross weight reduced to 450kg.
The rearwards extended hood makes installing the 65l fuel-tank behind the seat the only option left.
The brochure lists the specs. of the planes to be very similar to their ancestors. A stall speed of only 60km/h sounds a little optimistic however - at least at gross weight. The engines that are used for the D18/D19 are also listed as suitable for the ultralight variants - VW1600 - 1800, Rotax 912, JPX, Limbach and Jabiru.

 

Jodel-D18-3

 

Plans are being sold to homebuilders, but they were never factory produced.
In the 13 years that passed between the prototype's first flight and the summer of 1997, SAB had sold approximately 470 plans.

D18 Sovereign
Engine: VW 17l0cc, 58 hp
Wing span: 7.50 m
Length: 5,70 m
Wing area: 10 sq.m
Cabin width: 1,0 m
Fuel capacity: 65 lt
Seats:2
Empty weight: 245/255 kg
Max weight: 460 kg
Cruise speed: 175 km/h
Climb (2p): 3,5 m/s

D18 UL
Stall: 32 kt / 37 mph / 60 kmh
Cruise: 94 kt / 109 mph / 175 kmh
VNE: 134 kt / 154 mph / 248 kmh
Empty Weight: 235 kg / 518 lbs
MTOW Weight: 460 kg / 1014 lbs
Climb Ratio: 700 ft/min / 3.5 m/s
Take-off distance (50ft obstacle): 820 ft / 250 m
Landing distance (50ft obstacle): 1450 ft / 443 m

 

Jodel-D18-sktch

 

 


Copyright © 2017 all-aero. All Rights Reserved.
Joomla! is Free Software released under the GNU General Public License.