The Junkers Profly Ultima is a German
aerobatic homebuilt aircraft
Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...
that was designed by Andre Konig and produced by
Junkers Profly of
Kodnitz, introduced in 1993. When it was available the aircraft was supplied as a kit for amateur construction.
[Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 182. BAI Communications, 15 July 1998. ]
By January 2014 the aircraft was no longer offered by the company.
Design and development
The Ultima features a cantilever
low-wing
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes.
A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...
, a two-seats-in-
side-by-side configuration
Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction.
The original use of the term in English was in ''tandem harness'', which is used for two ...
enclosed cockpit under a
bubble canopy
A bubble canopy is an aircraft canopy constructed without bracing, for the purpose of providing a wider unobstructed field of view to the pilot, often providing 360° all-round visibility.
The designs of bubble canopies can drastically vary; s ...
, fixed
tricycle landing gear
Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...
with
wheel pants
An aircraft fairing is a structure whose primary function is to produce a smooth outline and reduce drag.Crane, Dale: ''Dictionary of Aeronautical Terms, Third Edition'', page 206. Aviation Supplies & Academics Inc, Newcastle Washington, 1997. ...
and a single engine in
tractor configuration
In aviation, the term tractor configuration refers to an aircraft constructed in the standard configuration with its engine mounted with the propeller in front of it so that the aircraft is "pulled" through the air. Oppositely, the pusher co ...
.
The aircraft's span wing mounts
flaps and has a wing area of . The cabin width is . The acceptable power range is and the standard engine used is the
Rotax 912UL
The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, l ...
four stroke
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directi ...
powerplant. For its aerobatic role the Ultima is stressed to +6 and -4
g.
The Ultima has a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for pilot, passenger and baggage is just .
The manufacturer estimated the construction time from the supplied kit as 400 hours.
Specifications (Ultima)
See also
*
List of aerobatic aircraft
An aerobatic aircraft is an aerodyne (a heavier-than-air aircraft) used in aerobatics, both for flight exhibitions and aerobatic competitions.
Most fall into one of two categories, aircraft used for training and by flight demonstration teams, wh ...
References
{{aerobatics
Ultima
1990s German sport aircraft
1990s German civil utility aircraft
Single-engined tractor aircraft
Low-wing aircraft
Homebuilt aircraft
Aerobatic aircraft
Aircraft first flown in 1993