STEMME S12 User Manual

DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
CHAPTERPAGE 65
MAINTENANCE MANUAL STEMME S12
If a revision proved the aircraft to be “tail-heavy“, the minimum load m
P, min
for an unchanged
empty weight m
leer
and CG position x
leer
can alternatively be determined by following formula:
m
P, min
= m
leer
x
leer
- x
Flug, h
x
Flug, h
- x
P, h
With: Aftmost aft in-ight CG: x
ug,h
= 420 mm / 16.54 in (aft of RP)
Aftmost aft seating (CG) position
of pilot:
x
P,h
= - 650 mm / 25.54 in (in front of RP)
The certied limits of the empty weight CG as a function of minimum load can be derived from
the following gure 6.3.b and 6.3.c. Two dierent minimum seat loads depending on the
loading conditions have to be determined and noted on the Weight of Balance Report (Annex
D), the weighing logsheet in the S12 Aircraft Flight Manual section 6.3 and the placards on the
center console:
• Full trim water ballast and luggage compartment - takes into account that the tail water
ballast tank and the luggage compartment in the tail-boom are fully loaded correspond-
ing to their limitations. This “worst case” could lead values higher than the maximum load
and should draw the pilot’s attention to perform an operating weight and CG calculation
before ight.
•
Empty trim water ballast and luggage compartment - expect no loading in the water
ballast tank and the luggage compartment in the tail-boom. This value could be used by
the pilot if this loading case is ensure before ight.
If maximum or minimum loads for the dierent compartments and seats are observed and the
empty weight CG is within limits, the in-ight aircraft CG is always within certied limits. This
means, that the load in the seats must equal or be higher than the minimum load, whereas total
cockpit load (pilot + co-pilot + parachutes + baggage) must be below the specied maximum load.
The dierence of total cockpit load and the maximum load must at least allow for a fuel load
required for a 30 minutes ight at maximum continuous power (13.6 l / 3.6 US gal. / 3 Imp.gal.,
10 kg / 22.05 lb).

STEMME S12 Specifications

General

Brand	STEMME
Model	S12
Category	Aircrafts
Language	English